Construction Review Africa

th

a 24th Anniversary Edition

August 2013, Vol 24 No.7

www.constructionreviewonline.com

Cunene River Bridge The longest bridge in Angola

In this issue...

Fulton Awards Celebrating Excellence and Innovation Ceiling Designs Defining space in an open floor plan Eskom’s Green Plant Environmentally friendly project UNABCEC celebrates 20 years Uganda

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MAGAZINE CONTENT 14

August 2013 Volume 24 No. 7

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Peter Kleynhans President of South African Institution of Civil Engineering (SAICE) WEB CONTENT

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REGULARS The Site Board News Association News Events New Products Corporate News

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SUPPLEMENTS Quality Office fittings

14

Ceiling Designs

16

Chillers, Cooling & Refrigiration Systems

20

PROJECTS Fulton Awards

24

10

Eskom’s Green Plant on Schedule

30

PICTORIAL 16th BUILDEXPO 2013 TotallyConcrete Expo 2013

11

Continues to Implement Growth Strategies

Cover Story Cunene River bridge

12

GUEST

Peter Kleynhans

Palabora Mine Company (PMC)

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Rehabilitation of sinkholes and life threatening hazards related to dolomite

36

Rural Electrification Improves Development

40

UNABCEC Celebrates Twenty Years

44

Share your opinions and comments in our Construction forum

24

44

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Construction Review is published eleven times a year and is circulated to members of relevant associations, governmental bodies and other personnel in the building and construction industry as well as suppliers of equipment, materials and services in Africa, the Middle and Far East. The editor welcomes articles and photographs for consideration.

Material may not be reproduced without prior permission from the publisher.

The publisher does not accept responsibility for the accuracy or authenticity of advertisements or contributions contained in the journal. Views expressed by contributors are not necessarily those of the publisher. © All rights reserved.

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Vol. 24 / No. 7 ISSN 1025-2886 Home page:

www.constructionreviewonline.com

August 2013

MANAGING EDITOR Robert Barnes

The Site Board Africa building standards called to question Africa’s construction industry is under scrutiny due to the frequency of collapsing buildings. A look at the year so far reveals that this problem is not unique to any single geographical area. In January, 5 people died and scores of others were injured in Kisumu, Kenya’s third largest town. At the end of March, a building under construction collapsed in Tanzania's largest city, Dar es Salaam, claiming more than 35 lives. The developers violated a permit to build an apartment building with 10 floors and at the time of collapse, it had 16 completed floors, with 3 more planned for a total of 19 floors.

In May, 4 people were killed when a building under construction in Nyagatare, some 100 km northeast of the Rwandan capital Kigali collapsed. The most recent incident reported took place in July in Nigeria's most populous city Lagos, where at least 6 people died when a three-storey building they were living in collapsed due to structural defects. These are just but a few of the many such incidents reported in the press with not only loss of life but also severe injuries as well as financial loss.

COUNTRY EDITORS Kenya - Francis Makari Uganda - Irene Kabuzire Nigeria - Boladale Ademiju WRITERS Irene Kabuzire, Elaine Young, Emmanuel Onsomu, Newton Mthethwa, Lindsay Wagner WEB / GRAPHIC DESIGN Augustine Ombwa Frankline May Moses Ngunjiri ADVERTISING Kenya William Mutama, Fred Okoth, Frances Lagoussis (Mombasa), Trizah Njoroge South Africa: Christine Tamukedde, Manoko Thosago, Prince Moyo Tabitha Muthoni,Winnie Sentabire, Angeline Ntobeng, Nqobile Ndlovu Uganda: Penny Komugisha, Betty Nabakooza Botswana: Dickson Manyudza, Gerald Mazikana Ethiopia: Haimanot Tesfaye Tanzania: Tom Kiage

Developers are to blame for this state of affairs with greed being the great motivator but alas the old adage of build cheap built twice has never been more true. Developers have been blamed for not hiring professionals to oversee projects as professional fees are seen as an unnecessary expense much as when a patient self medicates avoiding the consultation costs of seeing a doctor for a proper diagnosis.There is the need for governments as well to take a more than casual role in enforcement of building codes and regulations so as to ensure only trained professionals and contractors are permitted to carryout building works.

Robert Barnes September 2013

October 2013

Security Keeping unwanted guest out and our valuables in. We take a look at the emerging trends in locks including access control systems.

Formwork and Scaffold A scaffold is essential in providing safe access and a safe place to work from in construction either in the exterior or interior of a building.

Wet Services In this issue we look at submersible pumps that find use in boreholes, drainage, sewage pumping, general industrial pumping and slurry pumping.

Fire fighting and safety devices Most fires can be prevented by taking fire regulations seriously and installing reliable fire alarms and fire fighting equipment in buildings

November 2013

December 2013 - January 2014

Wind Power Wind power provides only about 1% of global energy needs but with breakthroughs in technology this inexhaustible supply is set to revolutionise the world

Machinery There are few construction equipments that can claim to be more versatile and important as an excavator.

Building Automation We take a look at today’s building automation systems that monitor and control environments in buildings for the safety and comfort of occupants.

Air conditioning The three components of heat, ventilation and air conditioning as found in the acronym HVAC need to be carefully considered to ensure the right system is installed.

The editor accepts letters and manuscripts for publication from readers all over the world. Include your name and address as a sign of good faith although you may request your name to be withheld from publication. We reserve the right to edit any material submitted .

Send your letters to:

info@constructionreviewonline.com

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NEWS

Cameroon

Yaounde, E. Guinea to build US$2million Bridge Cameroon and Equatorial Guinea have reached an agreement to construct a bridge on River Ntem on the 159km trans-national Kribi-Campo-Bata road.

Cameroon's Minister of the Economy, Planning and Regional Development (MINEPAT), Emmanuel Nganou Djoumessi and Equatorial Guinea's Minister of State in charge of Regional Integration, penned the Memorandum of Understanding in the conference hall of MINEPAT. The Memorandum of Understanding is to carry out studies in view of financing the project. The two countries need to raise their counterpart funding to meet up with the US$2million (about FCFA 1 billion) commited in 2012 by the African Development Bank. How much each State is expected to contribute will only be known after the studies have been carried out.

Upon completion, the road project, 77 km of which is on Cameroonian soil and 82 km on that of Equatorial Guinea, will greatly boost economic The bridge is part of the 159km trans-national highway between Cameroon activity in the sub-region as it will ease the movement of people and Equatorial Guinea. and goods. The project is in line with the trans-national transport infrastructure in the Central African Sub-region.

Kenya

Belgium to fund US$11.7 million Kenyan dam The Belgium government will help fund the construction of a multi-billion shillings water dam in Elgeyo Marakwet County in Kenya. The project which will be situated at Sibor forest in Keiyo South District will be funded jointly by the Belgium and Kenya governments at a cost of Ksh1.5 billion(US$11.7million).

Upon its completion, the project will serve more than 64,000 residents in Iten town. The town, which is the county headquarters and its environs has been experiencing acute water shortage. Among the public institutions along the Kerio Valley set to benefit from the water project are Tambach Teachers Training College, Tambach Sub-District Hospital and Tambach Boys High School.

The Kenyan government has allowed the county government to undertake the construction of the project that will start in a year. Feasibility studies and design work at the site have been approved by the government. The multi The Kenyan government has allowed the county government to undertake the construction of the project that will start in a year. Upon its completion, the billion shillings project was initiated by the Rift Valley Water Board four years project will serve more than 64,000 residents in Iten town . ago but stalled along the way due to lack of adequate funding.

Tanzania

New teminal for Julius Nyerere International Airport

The construction and completion of Terminal III at the Julius Nyerere International Airport in Dar es Salaam is set to open up activities in other sectors in the country. Tanzania Civil Aviation Authority proposed to construct a third terminal complex at the airport. BAM International, a Dutch company, was awarded a contract worth â‚Ź130m (US$170million) for the design and construction of the first phase of the new terminal in April 2013.

Julius Nyerere international airport is the largest airport in Tanzania. The airport is located 12km away from Dar es Salaam city. It was previously known as Dar es Salaam International Airport and was renamed in the honour of Julius Nyerere, the first president of Tanzania, in 2006. The airport is operated by Tanzania Civil Aviation Authority (TAA).

The construction and completion of Terminal III at the Julius Nyerere International Airport in Dar es Salaam is set to open up activities in other sectors in the country.

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The airport handled 1.82 million passengers and recorded over 70,460 aircraft movements in 2011, while handling 23.9 million tons of cargo.

August 2013

US$93Million constructed

hospitality

university

to

Kenya

be

A multi-billion shilling construction of the country’s first fully-fledged university offering degrees in purely hospitality is due to commence at the Kenyan Coast. The Ksh8 billion (US$93Million) ultra-modern tourism university to be known as Ronald Ngala Utalii College, will be set up at Vipingo, Kilifi County on 60 acres of land belonging to the Ministry of Tourism. Rea Vipingo donated the land for the project fully funded by the Kenyan taxpayer.

Tourism Fund CEO Allan Chenane, who is overseeing the design work, says the community around the institution will also be advised to put up hostels for those who will want to live outside the college. Chenane says the facility will also have a modern stadium not only for students but also the community. The Tourism Fund boss adds that locals will also benefit from wells that will be sunk around the proposed university.

Upon completion in five years, the facility will boast world-class services that include a 500-bed, five-star, beach hotel, a level five hospital and learning institutions for nursery, primary and secondary school levels for the community.

Upon completion in five years, the facility will boast world-class services that include a 500-bed, five-star, beach hotel.

Liberia

Liberia to build Africa's biggest shopping mall A South Korean investment company, the Make Group, says plans are far advanced to invest US$695 million in the construction of a Commercial Complex in Liberia which will be home to Africa's biggest shopping mall and a product manufacturing component; an Industrial Complex, for the manufacturing of cars, mobile phones, power generators and other electronic devices; a Residential and Educational Complex, with schools, hospitals and halls for major events; and a Resort and Leisure Complex, with modern hotels and other recreational facilities.

The company's delegation which recently paid a courtesy call on President Ellen Johnson Sirleaf at her Foreign Ministry office said the construction will be done on some 325 acres of land, adding that discussions and negotiations with the National Investment Commission were far advanced and nearing the conclusion stage.

Briefing President Sirleaf, Mr. James Juhee Han, Chairman and Proprietor of Make Group said that three months following the conclusion of the negotiation and the signing of an agreement, the construction of the Millennium Complex will begin.

Ethiopia gets construction

US$300million

for

Briefing President Sirleaf, Mr. James Juhee Han, Chairman of Make Group said that 3 months following the conclusion of the negotiation and the signing of an agreement, the construction of the Millennium Complex will begin.

Ethiopia

railway

The Export-Import Bank of India has approved a US$300 million line of credit to Ethiopia, paving the way for construction of a railway line linking Asaita in the Afar Regional State to the new port being built at Tajourah in Djibouti.

The agreement was signed between T.C.A. Ranganathan, chairman and managing director of Exim Bank, and Ethiopia's State Minister of Finance and Economic Affairs, Ahmed Shide in New Delhi. The Minister noted that the railway link to the port will provide increased impetus to growth, particularly in the northern part of the country.

The line is part of a larger regional project to improve railway connectivity in Ethiopia and other east African countries, he added.

The loan has been under discussion since the visit of Indian Prime Minister Manmohan Singh to Ethiopia in 2010.

The Exim Bank of India has approved a US$300 million line of credit to Ethiopia, paving the way for construction of a railway line linking Asaita in the Afar Regional State to the new port being built at Tajourah in Djibouti.

August 2013

7

ASSOCIATION NEWS & EVENTS

The National Council for Construction - Zambia The National Council for Construction (NCC) says the increase in the price of cement is unfortunate especially coming after rises in fuel in other critical sectors. NCC Executive Director Dr Sylvester Mashamba said there is need to probe the widespread increase in the general price of commodities.

He said the increase in the price of cement would increase the cost of construction. "On one hand they want to remove subsidies to have money to build hospitals, school and roads but then the same measure seems to push up the prices of other commodities including cement," he said, "We need to probe what has pushed the price of cement up."

Dr. Mashamba also pleaded with people that were increasing prices to ensure that they were commensurate with the fuel hike.

The National Council for Construction (NCC) says the increase in the price of cement is unfortunate especially coming after rises in fuel in other critical sectors.

A 50 kilogramme bag of cement is trading from KR 70(US$12.8) to KR 78(US$14.3) from the previous KR 55(US$10.1).So far Zambians have had to deal with widespread increase in fuel prices that started with government's removal of fuel subsidies that pushed the prices of several basic needs upwards.

Power Investors Summit Position your company alongside major stakeholders and international investors contracted to transform Nigeria’s power sector at the inaugural Nigeria Power Investors Forum this October. Download the full agenda.

Why is the Nigeria Power Investors Forum relevant? Nigeria’s power sector reform witnessed setbacks from inception due to a lack of political will, the uprising of the labour party against the unbundling of the state owned PHCN and the resignation of the former Minister of Power created uncertainty and shattered the confidence of interested investors in Nigeria’s hugely attractive power privatisation process.

Date:

2nd – 4th October, 2013

Venue: Lagos Oriental Hotel,Nigeria Contact: Melanie Botting Email:

m.botting@energynet.co.uk

Website: www.energynet.co.uk

Suddenly, 2012 marked a major turning point in the history of Nigeria’s power sector.

After the restructuring of the Ministry of Power and a transparent and rigorous transaction process Manitoba hydro was first awarded the management contract for the transmission company of Nigeria (TCN), five core investors were awarded licenses for the Generation companies (GENCOs) and ten investors were awarded license for the distribution companies (DISCOs). The 15 preferred investors have now paid their 25 percent instalment for the purchase price for the PHCN successor company with a remaining 75 percent to conclude the negotiations.

ITS & Road Safety Forum 2013 Summit Following the success of the ITS and Road Safety Forum Qatar 2012, where global leaders in the ITS and road safety industry came together in Qatar to uncover the latest project updates and industry developments, IQPC is proud to host the ITS and Road Safety Forum Qatar again from 16-17 September 2013 at the St Regis Doha, Qatar.

This summit will provide a benefi cial forum for Intelligent Transport Systems (ITS) and road safety stakeholders and international members of the transportation industry from across the value chain. The 2012 forum was opened by H.E. Eng. Nasser Al Mawlawi, President of Qatar Public Works Authority, Ashghal, and was attended by more than 300 international and local executives who are shaping the future of ITS and road safety in the region.

Date:

16th-17th September, 2013

Venue: St. Regis Hotel, Doha, Qatar Contact: Mausam Ali Khan Email:

MausamKhan@iqpc.ae

Website: www.itsroadsafetyqatar.com 8

With Qatar allocating approximately US $12.5 billion on improving and creating road networks, Qatar Public Works Authority, Ashghal, is focused on implementing sophisticated ITS to provide a multimodal, safe, efficient and sustainable transport network. Qatar Public Works Authority, Ashghal, have demonstrated their commitment to the delivery of safe road infrastructure through the integration of state-of-the-art technologies and transport systems and the launch of their ITS Masterplan which will be delivered before 2017.

August 2013

PRODUCTS

JCB’s 512-56 Loadall Telescopic Handler The 512-56 Loadall is the largest machine in the company's range of telescopic handlers. It can lift a maximum load of 12,000 lbs. with a maximum lift height of 56 ft. Its high-boom design ensures optimum operator visibility when working or traveling. Standard axle-mounted stabilizers provide efficient chassis leveling for lifting larger loads.

The unit is now equipped with a high-torque, low-emission Ecomax diesel engine that is paired with a four-speed powershift transmission. Features include heavy-duty axles with torque-proportioning differentials and a lower-mounted, spacious, ergonomically-designed cab. www.jcb.com

Superlite Void Formers and Pile Casings The Superlite Void former has been developed to provide the South African construction industry with a low cost, lightweight and robust cell former. They are designed to meet the stringent performance requirements imposed by local design and on-site conditions. They are spirally locked, seamed and swaged for maximum strength and resist the full hydrostatic pressure of concrete and all loads associated with the compaction or vibration of concrete during placing. Superlite cell formers are available in uncoated or galvanised mild steel.

Standard material thicknesses are 0.6; 0.8; 1.0; and 1.2mm. The standard maximum length of the cell former is 6m, but special longer lengths are available on request. Where extra-long lengths are required, the cell formers may be supplied in split lengths and fitted with a system of spigot and socket joining collars to enable the contractor to achieve any length that may be required. Stop ends can be provided if required to prevent the ingress of concrete, if the cell is to be used as a void former. www.armco.co.za

Hyundai R480LC-9A & R520LC-9A Excavators The Tier 4 Interim R480LC-9A and R520LC-9A crawler excavators feature the Hi-mate Remote Management System for access to the machine's vital service and diagnostic information from anywhere with Internet access. Low emission, low noise Cummins QSX11.9 engine with up to 50% torque rise; 352 hp, Variable speed fan clutch \Two-stage auto decel system, Power, Standard and Economy engine modes, Redesigned hydraulic system, Slimmer, stronger tubing in enlarged cab; see-through upper skylight and one-piece right-side glass; safety glass windows on all sides of cab, Integrated seat and console,. Adjust able air-suspension standard, Color LCD display cluster with digital gauges monitor temperature, fuel levels and other maintenance items. R480LC-9A; Operating weight: 108,420 lbs, Bucket breakout force: 54,950 lbf, Max dig depth: 27 ft. 9 in, Length: 39 ft. 6 in, Width: 11 ft. 7 in, Bucket size: 1.31 to 3.96 cu. yd. www.Hyundai.com

Gyproc’s new DONN ceiling system The South African Gyproc team has launched the reinvented DONN ceiling system. Industry stakeholders, including contractors, architects, project managers and media, were present at a series of events in cities across the country. The new generation of DONN grids are fully compatible and interchangeable with previous versions, and now have a light-reflective steel capping and are coloured snow white. Their galvanized steel construction ensures rust resistance.

Being the most trusted and widely installed exposed grid system in the country, DONN is committed to manufacturing products to ISO standards, ensuring superior quality and consistency. Testimony to this, is the product's 60-minute fire rating for stability and integrity, the only system on the market with a fire rating above 30 minutes in accordance with SANS10177:Part 2. www.gyproc.co.zae August 2013

9

CORPORATE NEWS

Nigeria

GE's US$1billion bet on Nigeria Nigeria’s desire to become one of the world’s twenty largest economies by the year 2020 is gradually becoming a reality with the choice of a multi-billion dollar private company, General Electric, to establish a US$1 billion manufacturing and training facility at the free trade zone, in Calabar, the Cross River State Capital.

Speaking during the foundation-laying ceremony, which was performed by Nigeria’s Vice President, Namadi Sambo, at the construction site in Calabar, the company’s President and CEO, GE Nigeria, Lazarus Angbazo said GE’s mandate is to encourage the creation of local employment, eliminating imports, thereby leading to a robust Nigerian Economy.

In a report to shareholders, GE global CEO, Jeff Immelt, says Sub-Saharan Africa was off the radar when he became CEO. Today, the company is at a US$3 billion annual run rate, and that could double in the next few years. GE could have “US$1 billion Franchises” in Nigeria, South Africa, Mozambique and Angola. Immelt says that they are investing in capability and people General Electric plans to establish a US$1 billion manufacturing and training adding that there are very few American companies in the region. He says GE facility at the free trade zone, in Calabar, the Cross River State Capital. would sell more gas turbines in Africa than in the U.S. in the next few years.

Murray & Roberts appointed for JKIA railway line to commence CTI urges more taxes for US$200 million Bay West Mall this year imported cement

The company took to the site in Port Elizabeth's western suburbs recently under the eye of Alex Boyazoglu, MD of M&R Buildings.

The project which needs Ksh6billion (US$70million) to take off is expected to be complete by the end of 2014.

CTI Chairman, Mr. Felix Mosha expressed concern that highly subsidised imported cement is unfairly competing with locally-made cement.

Co-developers of the super regional Bay West Mall, Abacus Asset Management and Billion Group, have appointed construction industry giants Murray & Roberts (M&R) as the primary contractor on the R2 billion (US$200million) project, set for opening in early 2015. The company took to the site in Port Elizabeth's western suburbs, adjacent to the N2, recently under the eye of Alex Boyazoglu, MD of M&R Buildings.

Construction of the railway line linking Jomo Kenyatta International Airport and the city centre is set to start before the end of this year, the Kenya Railways managing director Nduva Muli has said. He said the corporation is finalising on the tender process for contactors.

The Confederation of Tanzania Industries (CTI) wants the government to slap more taxes on imported cement to create a level playing field with local cement producers. Speaking at a news conference in Dar es Salaam, the CTI Chairman, Mr. Felix Mosha, expressed concern that highly subsidised imported cement is unfairly competing with locally-made cement, thus threatening local producers.

The construction of the mall will create about 10,000 jobs during the construction phase – 3,000 through direct employment and more than 7,000 indirect and induced jobs. A further 1,500 permanent jobs will be created to staff 250 retail outlets in the 90,000m² shopping centre, which will be similar in size to Cape Town's Canal Walk shopping centre, also built by M&R. A 50 percent minimum target has been set for the use of BBBEE, local labour and spending on the project within the local economy.

The developers have also appointed Azola Tybosch as the community liaison officer to assist Bay SMEs to register on a database for possible work on the project.

10

The line will be in two phases one from Embakasi Railway Station to the Syokimau Railway station and the other from Syokimau to JKIA. The project which needs Ksh6billion (US$70million) to take off is expected to be complete by the end of 2014. It is expected to ease transport from the Central Business District to the Airport.

The journey which takes less than half an hour during off peak can take up to two hours during traffic jams. The airport commuter line is part of the larger Nairobi Commuter Rail Project that is aimed at easing Nairobi's traffic flow and is expected to cost about Ksh26 billion (US$302.5million). The Imara Daima and Makadara stations are 80 per cent complete and are expected to be operational in two months time.

Mr. Mosha said local producers can hardly compete with their foreign counterparts who are highly subsidised by their respective governments.

The CTI's Director of Policy and Research, Mr. Hussein Kamote, also noted that while indicative price for cement is US$100 per tonne in the world market, some countries are subsidising their producers to enable them sell the same at between US$74 and US$90.

Even though he did not mention the countries that are subsidising their cement producers, it is a known fact that Pakistan has been highly subsidising its cement producers.

August 2013

Billion Group keen on Africa Academy to increase number of US$117million boost for expansion Menengai geothermal project qualified draughtspeople

Billion and Rebosis chief executive, Sisa Ngebulana, says Billion is undertaking 12 retail shopping centre developments in Africa.

The academy also assists candidates with job placements through an online portal hosted by the CAD Corporation.

Kenya has for years depended heavily on petroleum and this has had an adverse effect on her economy.

The Billion Group, a property developer that is also the asset manager of JSElisted Rebosis Property Fund, has several significant developments underway in South Africa, and is simultaneously targeting retail developments on the rest of the continent, which may eventually be listed separately.

Software Company CAD Corporation in partnership with CAD Corporation Draughting Academy has opened a new academy to assist in filling the gap for skilled draughtspeople, designers and computer-aided design (CAD) specialists. South Africa produces 1, 000 draughtspeople a year and according to the South African Institute of Draughting (SAID), 5, 000 draughtspeople should be trained every year.

Increasing growth of Kenya’s geothermal energy has continued to attract international interest in the recent years. The World Bank has pledged to inject an additional KSh10 billion (US$117million) to the Menengai Geothermal project to speed up drilling and exploitation of eco-friendly energy.

Billion and Rebosis chief executive, Sisa Ngebulana, said recently that Billion was undertaking 12 retail shopping centre developments between Angola, Ghana, Nigeria and Uganda, which would each be between 25,000m² and 40,000m² in size. He said the group has offices in these regions and has had people there on the ground for the past two years.

While the centres were likely to house some South African retailers and local retailers, the group had seen strong international interest from the likes of French multinational retailer Carrefour. Members of the leasing teams who had let Dubai Mall and other centres in Dubai had recently joined Billion's leasing team.

CAD Cor- poration Draughting Academy MD, Robert Schmidt says the draughtsperson course at the academy is structured to prepare students in their careers by focusing on software training, including a variety of Autodesk software.

The academy also assists candidates with job placements through an online portal hosted by the CAD Corporation. The course outline was developed with lead- ing industry experts to expose students to the maximum amount of theory, software and practical industry knowledge. The course duration is 90 days for full-time students and ten months for part-time students.

World Bank’s pledge comes at a time when the project’s developer Geothermal Development Company (GDC) is intensifying effort to seek investors to build power plants in the project aimed to produce 5,000MW by 2030. Speaking during a recent tour of Menengai Project, Nathan Belete, the World Bank sustainable development sector leader said they will support the project as they are satisfied with the current progress on the ground.

Mr. Belete assured GDC of the World Bank’s support to ensure it achieves its intended goal of driving the Kenyan economy. The importance of developing alternative sources of energyfor Kenya cannot be overemphasized.

Association Partners Kenya

- Architectural Association of Kenya - Institute of Quantity Surveyors of Kenya - Institute of Engineers of Kenya - Association of Consulting Engineers of - Kenya - Association of Professional Societies of East Africa APSEA) - Kenya Property developers Association - Institution of Surveyors of Kenya

Namibia

Institute of Namibian Quantity Surveyors Association of Consulting Engineers of Namibia

Uganda

Institute of Surveyors of Uganda

Zimbabwe - Zimbabwe Institute of Quantity Surveyors - Zimbabwe Institute of Engineers - The Construction Industry Federation of Zimbabwe (Cifoz)

Ghana

- Ghana Institute of Engineers - Architects Registration Council - Ghana Institute of Surveyors - Ghana Green Builders Association - Ghana Institute of Planners

Tanzania

Botswana

- Tanzania Institute of Quantity Surveyors

Institute of Botswana Quantity Surveyors

- Construction Regulation Board (CRB)

Ethiopia

- Tanzania’s Registration Board of Architects

Construction Contractors Association of Ethiopia

South Africa

and Quantity Surveyors (AQSRB)

August 2013

- ASAQS - SAICE - South African Council for the Quantity Surveying Profession - Khuthaza ( Women for Housing) - Concrete Manufacturers Association - Green Building council of SA - South African Property Owners Association - Master Builders South Africa

Nigeria

- Association of Consulting Engineers Nigeria - Association of Professional Women Engineers Of Nigeria - Council of Registered Builders of Nigeria - The Nigerian Institute of Architects - American Association of Petroleum Geologists Africa Region 11

Guest

Peter Kleynhans

Pr Eng,Pr PLN,Pr CPM, C Eng, President of South African Institution of Civil Engineering (SAICE)

Peter Kleynhans

Mr. Peter Kleynhans is the newly elected president of South African Institution of Civil Engineering (SAICE). He is a registered Professional Engineer, Professional Planner, Professional Construction Project Manager and a Chartered Engineer with broad-ranging experience spanning more than 40 years. He is a Fellow of the South African Institution of Civil Engineering (SAICE), as well as a Fellow or Corporate Member of five other professional institutions in South Africa and in the United Kingdom.

Over more than 30 years, Peter has served on several SAICE divisional committees and was chairman of the Institution’s Finance and Administration Committee. He is a member of the SAICE Council and has served on the Executive Board in various capacities. Peter received the SAICE President's Award in 2002 for meritorious service to SAICE and for significant ongoing contributions towards the civil engineering profession. In 2009, he received the SAICE President’s Award for exceptional voluntary service to SAICE.

Peter received the SAICE President's Award in 2002 for meritorious service to SAICE and for significant ongoing contributions towards the civil engineering profession. In 2009, he received the SAICE President’s Award for exceptional voluntary service to SAICE. 12

He has experience in strategic and business planning, people management, coordination of professional services, marketing and directing the execution of projects. Project work has included the provision of services to clients and communities in the fields of urban and rural development, town and regional planning, capacity building, facilitation, environmental management, water and sanitation services, streets and stormwater drainage, water services development plans, by-laws and infrastructure planning models, as well as management support to central government, regional authorities and municipalities.

For many years, Peter was the Managing Director of the Development and Water Divisions of SSI Engineers and Environmental Consultants (now Royal HaskoningDHV), a leading South African consulting engineering firm with activities internationally, many of which are in Africa.

During his inauguration as the new SAICE president on 12 February 2013, Kleynhans noted that a third of the world’s population is reported to live in poverty (more than two billion people) and in Africa it is thought to be about three hundred million. “Unemployment is a global phenomenon.

This state of affairs might indicate that the global economy is unable to provide employment for the world’s population” he stated.

With regards to population growth, the SAICE president said there is need to actively promote and support appropriate initiatives to attain a continuous reduction in the population growth rate. “Such interventions are in the interest of both current and future generations,” he said. He also highlighted on demand management explaining that while measures have been put in place to reduce the impact of civil engineering works on the environment, what has not received attention is reducing the need for engineering works.

“The clamour for new works to satisfy the existing and burgeoning population has enabled us (civil engineers) to fulfill our aspirations (creating immovable assets). On the other hand, this is being achieved at the expense of future generations. Also, each new immovable asset creates a life-long liability. A case can be made, therefore, that the demand for immovable assets should be reduced. The consequence of such an approach is that, at the outset of any civil engineering project, the question should be asked as to whether or not the immovable asset is really necessary. Only if the answer is truly positive should a project proceed in the most environmentally effective manner,” he said.

He added that engineering, particularly civil engineering, has done very much to benefit humankind over the centuries and to increase standards of living. “Indeed, we pride ourselves on applying the skill, art and science of our calling to the benefit of humankind and to adapting nature to that end. The unintended outcome of our endeavours is that we have played a major role in enabling unbridled population growth, increasing demand and resource degradation/depletion to occur.

“We have a mind-set that a growing population is necessary for our industry and economies to flourish. This view is open to question. A large, significantly impoverished population is not conducive to business or economic growth.

Read more on this article at

http://www.constructionreviewonline.com

August 2013

16th BUILDEXPO 2013 Date: 18th - 20th May 2013, Venue: Diamond Jubilee Hall,Dar-es-Salaam, Tanzania

Delegates from Konnex Ltd.

GF Trucks briefing the Chief Guest.

Jumbo Chem Kenya at BUILDEXPO Africa 2013.

Opening Ceremony By The Permanent Secretary, Ministry of Trade & Industry.

TASK FZC in discussion with a visitor.

Visitor being briefed about a product.

TotallyConcrete Expo 2013 Date: held on 3rd June 2013, Venue: Johannesburg, South Africa

Delegates registering.

Exhibition hall.

Afrisam stand.

Participants visiting exhibition stands.

Delegates follow proceedings.

Delegates networking during a break.

Cunene River Bridge The longest bridge in Angola

The new bridge crossing site is located 20m downstream of the remains of the original bridge structure over the Cunene River, northwest of the village of Xangongo in the Cunene Province.

The bridge spans a perennial river channel of approximately 100m and then crosses the flood plain of the river for a distance of 780m to the start of an embankment which traverses the remainder of the flood plain.

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By Emmanuel Onsomu The new Cunene River Bridge located in Angola lies on the major arterial road linking the major cities of Lubango and Ondjiva in south-western Angola. It replaces a host of temporary structures that were used to span the Cunene River after the last permanent structure (a concrete bridge built in the colonial period) was destroyed early in the Angolan conflict.

The old bridge’s strategic location as the main link between Angola and other southern African countries, as well as the link from the Cunene province to the rest of Angola, made it a target during the civil war. The Angolan Roads Institute (INEA) appointed Aurecon, together with its joint venture partners Gabeng and BKS, for the design and preparation of bid documents. This joint venture was also responsible for site supervision.

The Angolan Government invested approximately US$49 million in the project and construction on the 880m-long bridge began in January 2007.

Project Highlights At 880m-long, the Cunene Bridge is currently the longest bridge in Angola. The selected deck type, consisting of dual steel box girders with a concrete slab proved to be appropriate for this bridge crossing, even with major logistical constraints.

The fabrication of 142 box girder sections in Qing Huang Dao, China, concurrently with the construction of 1384 precast concrete deck slabs on site in Angola, ensured that the project took place within time constraints. The box girders were shipped to Namibe Port in Angola, and transported 600km by road to the Cunene River construction site. An assembly and welding yard was established at one end of the bridge.

Girders were welded together two at a time and then incrementally launched using hydraulic jacks.

The bridge comprised a twin steel box girder and partial precast with insitu infill concrete deck slab.

Before the bridge sections could be launched, reinforced substructures consisting of 16 piers and the 2 abutments, founded on piles had to be constructed. Using a temporary fill, a working platform on the flood plain was created so that piling work could continue uninterrupted during the five months that the flood plain was inundated.

This enabled the 110 friction piles, with a diameter of 1,2m and an average length of 25m, to be positioned in the shortest time possible.

Project Overview The new bridge crossing site is located 20m downstream of the remains of the original bridge structure over the Cunene River, northwest of the village of Xangongo in the Cunene Province.

The bridge spans a perennial river channel of approximately 100m and then crosses the flood plain of the river for a distance of 780m to the start of an embankment which traverses the remainder of the flood plain. The plain is regularly inundated during the rainy season, which starts from approximately November each year and lasts to the end of March of the following year.

For a large part of this period, the flood plain is often inaccessible due to the high level of the river water.

Scope of works The work for the construction of the bridge consisted mainly of the following: Establishing resources on site, Maintenance of existing bypass road and Bailey bridges across the Cunene River and accommodation of traffic, Manufacture and August 2013

painting of structural steel box girders off site, Transportation of large steel segments to site, On site welding together of large steel box girder segments to form a continuous structural steel box girder, two in number, each 880m in length, Specialist work that included constructing piers supported by piles in a fast-flowing river Incremental launching of the steel box girders to move it into its final position, Construction of precast concrete deck elements, placing and aligning of the, precast concrete deck elements on the structural steel box girders. Casting in situ concrete strips between the precast deck elements to form one monolithic deck slab, Supply and installation of bridge expansion joints, Asphalt surfacing of bridge deck, Erecting special collapsible guard rails on steel posts, Erosion protection and Supply and installation of road lighting.

QUALITY OF ENGINEERING DESIGN Aurecon was initially responsible for the detail design of the structure and the compilation of the project documentation. The detail design comprised the foundation-, sub structure-, and super structure design. In particular, the loading of the bridge during launching had to be accommodated in the design.

Hydrology and hydraulics The Cunene River at this location has a catchment area of 52, 400km2. The maximum measured flood occurred in 1951. The peak flood was estimated to be 14,180m3/s and more than 50 years later, a higher flood has not been recorded. A free board of 2m above the maximum recorded flood level was provided. The River is not very stable and the main channels shift after each flood season. Therefore, the Bridge had to have an opening long enough to accommodate the different main channel positions.

Ingenuity, Originality And Innovation The importance to the client of completing the Cunene River Bridge within its deadline was a main driver in determining many aspects of the

design philosophy. The contractor’s construction sequencing and turnaround times played a significant part in the detailed design of the bridge works. In this region, concrete aggregate is scarce and had to be hauled from a long distance to the site. This led to the design of an economic solution in the form of a composite deck.

The special features of the bridge include: Composite construction The choice of a composite construction design utilising structural steel box girders and a concrete deck had the following advantages: Reduced weight of the structure which in turn reduced the size of foundations required - all translating into financial savings, Structural steel substructure could be manufactured in parallel with the construction of the concrete substructure, Reduced construction period required for launching of structural steel box girders and no staging and formwork required After the structural steel box girders had been launched into position on the concrete substructure, construction of the concrete deck could continue uninterrupted and was not affected by the flooding river.

Concrete precast decking The concrete deck consists of 1384 precast concrete elements with in-situ cast strips in between. This method reduced construction time required as a large proportion of the deck could be manufactured while the construction of the box girders and substructure was in progress. Construction time of the concrete deck was considerably reduced due to the speed of placing the precast elements and the reduced requirement for formwork before fixing of reinforcement and placing of concrete in the connection strips.

Read more on this article at

http://www.constructionreviewonline.com

Professional Team Developer and Project Managers: Instituto de Estradas de Angola (INEA) Main Building Contractor: China Road and Bridge Corporation (CRBC) Structural & Civil Engineers: Aurecon in joint venture with BKS and Gabeng Geotechnical Engineers: Aurecon

Quality Office fittings

By Yvonne Andiva Once the construction of an office block is done next comes the office fit out. Setting the right mood and environment for an office fit out is a statement of a company’s culture and therefore great care must be taken when undertaking the task.

Fitting out a new office or refurbishing an old look requires planning, proper budget, the right vendor and the most befitting furniture. The floor, partitions and ceilings as well as furniture must blend and not be a clatter of mismatched pieces and colors.

With today’s sophisticated tastes to take into consideration selection of the type of partition and flooring can be a nightmare.

Throw into this the need for cost consciousness as well as environmental aspects and you have the makings of a daunting task. Several choices on material exist that give you the ability to easily change office configurations while the flooring options range from traditional carpeting to more robust and maintenance friendly options. Fire retardant materials have become the rage in recent years as the need for greater safety has

taken front stage as has recyclability and the environmental aspects of the products used.

HÄFELE They are an internationally organized family owned and operated business with headquarters in Nagold, Germany. It was founded in 1923 and today serves the furniture industry, architects, planners, cabinet makers/joiners as well as dealers in over 150 countries around the world with furniture fittings and architectural hardware as well as electronic access control systems.

Sliding Door Systems gives flexibility to a space, opening up rooms internally creating one space or inserting a temporary divide, merging the inside and outside space as one or even helping to optimize space with sliding cabinet door designs.

Hafele offer a variety of sliding door solutions to suit a variety of applications, from the smallest to the largest of projects allowing you to create a space that’s made personal to individual requirements.

Their commitment to investment in infrastructure is to support every improving levels of customer service which can be seen in the development of their warehouse and newly refurbished showroom facility.

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products will be easy to buy. Their policies will be reasonable and easy to comprehend implemented by the most spirited, friendly and professional people in the business.

Wood Architectural Works Wood Architectural Works is a German Interior Design company in Qatar.

Driven by the philosophy of quality and style, WAW Showroom features on 777 m2 iconic international interior brands. The distinctive showroom on The Pearl Qatar houses stunning German and Italian products of international brands like ROLF BENZ, MIELE, HÜLSTA and HÄCKER. These brands combine contemporary interior design ideas with innovative technology, creating the ultimate living environment.

Products range from complete living space interiors to kitchens, domestic professional appliances and lighting, which include crystals and Murano chandeliers.

With this selection they focus on those who like to surround themselves with the highest possible standards of contemporary interior design.

Besides offering the ultimate design experience their highly experienced décor consultants will guide you through the many and exciting possibilities offered by these unique collections.

HAFELE is well presented on the African continent through local representatives in various countries and the subsidiary in South Africa.

Metro Design Consultants Metro are a well-established London based company who thrive on the latest technologies in interior design. They are an Award winning office interior design company which specializes in Design & Build.

Metro is committed to establishing a long lasting customer relationship built on strength and integrity. Their role as an innovator in the evolution of the modern office is evident in their approach to problem solving and base of their competitive positioning. Not only do they deal with office interiors, but generally all interior space requirements you may have, to bring you an aesthetically pleasing as well as functional design.

Metro will design, procure and install the best quality products with attention to detail second to none. Their products will speak for themselves long after brochures; sales staff, fair price and speedy installation are gone. Their products look good, work well, wear well and are an ongoing credit to the manufacture and their client.

Metro will be the easiest company to do business with and also the most pleasant because their

Office Design & Custom Fitout BAFCO Interiors Known in the industry as “Great offices, delivered”, their business has taken them around the world to bring the finest and richest products to be able to create practical workplaces for customers.

BAFCO Interiors is the UAE’s leading office design, refurbishment, fit-out and office furniture manufacturer. They are here to change the way you think about your office.

An office must portray its work culture and BAFCO Interiors makes an effort to understand yours. So they do what it takes: survey your staff, study your needs, and analyze your activity. They create 3D designs and with your approval, they bring it to life.

From measuring up to moving in, the responsibilities are theirs. They do the planning, manage the schedules, work the odd hours

just anything to make sure your experience is a positive one.

Whether it’s a few chairs or an entire office, they give you their best. They understand your investment is long-term. Your office needs to accommodate your future growth. They make sure it stays efficient as you develop.

Office & Retail Shop Fitting Charles Dean Developments Charles Dean Developments are well established builders working around Bromley and Sevenoaks.

Their builders can offer both domestic building work as well as Commercial building work in Bromley.

Operating in other areas such as Sevenoaks, Beckenham and Tunbridge Wells, they also offer building work such as refurbishments, refits and extensions.

Blue chip Commercial Clients generally employ in house qualified Facility Mangers who work closely with a team of good honest designers & tradesmen such as Charles Dean so they can implement their office refits & redesigns.

However, many companies do not have the luxury to employ full time professionals and therefore whilst they may know what they want they have little knowledge on how to implement office alterations or relocation.

Charles Dean was set up to resolve these problems and assist any Company wishing to design & or construct any elements of the office or shop environment. They deal with all aspects of design including space planning, partitioning, shop fitting, false ceilings, raised floors, voice & data, etc.

Projects can be carried out with building users remaining in occupation necessitating close client liaison and accurate programming in order to minimize disruption and maintain safe working practices during construction. Their builders have valuable experience and their building portfolio is very impressive.

LIST OF CONTRIBUTORS HÄFELE GmbH & Co KG Dieter van Gelder Dieter.vanGelder@haefele.de www.haefele.com Metro Design Consultants Daniel Taylor daniel@metrodesign.co.uk www.metrodesign.co.uk Wood Architectural Works Grace Ghanem

August 2013

g.ghanem@cdc-qatar.com www.waw-qatar.com BAFCO LLC Gilbert Griño gilbert@bafco.com www.bafco.com Charles Dean Developments Ltd Robert Mitchell sales@charlesdean.co.uk www.charlesdean.co.uk 17

Ceiling Designs

By Yvonne Andiva One of the main goals of architecture is to clearly and beautifully define and differentiate space in a home. Today’s families want houses that accommodate their lifestyles, which tend to be less formal than they were in the past, more so, one that translates into more open floor plans.

However, even within the openness of a great room, it is nice to set the individual functions of the kitchen, dining area and other rooms apart and define them in the design. Using the ceiling is a great way to define space in an open floor plan.

Adding exposed beams, lowering or increasing the ceiling height, adding variation to the ceiling finish materials, or the strategic placement of light fixtures are all effective ways to define space.

Ceilings can be dressed up to impact the feel of a room. You can contrast the ceiling finish with the wall finish by adding paneling such as bead board or tongue-in-groove wood, changing texture or color, or adding a pattern of trim or beams. One trick to make a room feel taller is to add a trim band on the walls about a foot below the ceiling

and paint the portion above the trim the same color as the ceiling. A chandelier in effect lowers the perceived ceiling and defines a certain space, usually over a dining table. The pattern of general ambient lighting, such as recessed lights, gives order and definition to a space. Up lighting tends to make a ceiling feel taller, while track lighting will emphasize things below it on the wall.

Custom Made Ceiling Solutions Founded in 1921, Pancaldi now works in the third generation under the management of Mr. Maurizio Pancaldi and his team of about 60 employees.

For more than 2 decades, Pancaldi metal ceilings have been manufactured with high process and product quality on modern machinery.

The production plant is located in Modena.

Experience, know-how and the permanent will of the entire Pancaldi team make sure that customers get what they ask for. Based on the different Pancaldi metal ceiling systems, there is almost no limit for custom made solutions by developing and realizing projects specially designed for extremely valid functional and attractive finish performances

of false ceilings solutions for internal and external facing as well as petrol shelters and kiosks.

Pancaldi markets an attractive wide range of steel and metal ceilings suspension solutions for all building constructions needs in residential, commercial and industrial segments with the high technological value and aesthetic features of the system reflects how adaptable it is and how it can be integrated and introduced to any pre-existing environment in harmony by sorting out all the problems linked to the project and offering great look and acoustic quality.

Pancaldi has gained a wonderful reputation in the market for its wide range of solutions coupled with reliability, versatility and aesthetic qualities, by means of technical skills and resources to meet the requirements of the projects and providing a high level of customer support to ensure total customer satisfaction.

Its 20 year experience on production of special metal false ceilings (and very close cooperation with other Internationals manufacturers such as GEMA in Germany for example), has contributed to develop a new naval section, PANCALDI Marine Division, which has gathered the best technical and commercial sources of the field, by introducing immediately into production cycle specific toolings and accessories for “naval standard”.

Sky Factory The Sky Factory is a unique fine art and technology company that creates realistic Biophilic Illusions of Nature™ – virtual skylights and windows – that transform interior spaces into healthier, more relaxing environments.

Applications include hospitals, senior care

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facilities, schools, workplaces, hotels, spas, and luxury homes. Sky Factory's new digital cinema products, eScape™ and SkyV™ provide rich, lifelike nature experiences of motion and sound.

Unique biophilic design elements, Luminous SkyCeilings enliven the innate human connection to nature and trigger beneficial relaxation responses. Evidence-based design (EBD) research indicates that illusions of nature promote healing and reduce the use of pain medications in healthcare settings.

Hospital patients recovering from surgery or an illness respond more positively in rooms with engaging views to nature, which translates into better health outcomes and bottom-line benefits. Sky Factory’s EcoSlim LED Luminous SkyCeiling™ is the leaner, greener Luminous SkyCeiling. Featuring exquisitely unique skyimage compositions based on Sky Factory’s own ultra high-resolution digital files, EcoSlim SkyCeilings natural realism triggers relaxation responses akin to real skylight views.

The edge-lit LED illumination system contains virtually none of the toxic elements of fluorescents, is far longer lasting (50,000 + hour life), and costs 15percent less to operate than fluorescent systems for comparable illumination. The EcoSlim LED lighting unit has a compact profile that uses less material to construct – EcoSlim frames are made from 76 percent recycled aluminum.

EcoSlim SkyCeilings are fully compatible with MRI and all other radiology and RF-free environments.

Steel ceiling panels Progress Eco is a leading Polish manufacturer of decorative architectural meshes or grids, made of stainless steel, galvanized steel and aluminum. They offer both individual and system solutions. Complex manufacturing, consulting and servicing program allows for the implementation of ambitious projects in the field of interior and exterior architecture, finding application in: metal facades and elevations, metal sun breakers, metal suspended ceilings, metal shutters and roller blinds, metal balustrades and welded ventilation grids and drainage systems.

Steel ceiling panels are classified as nonflammable and do not spread fire. They are classified as A1 class on reaction to fire. Metal ceiling systems allow for easy installation of any luminaries and other components and systems (eg, speakers, diffusers), provided that they are hanging on the ceiling.

They come with several advantages; Easy formation of space, transparent nature of the product, together with the control of open area, Effect of depth and three-dimensionality, hiding of unwanted items or surfaces, no need of full space closure, Use of multi-faceted surfaces, Possibility of indoor and outdoor use, Can be applied for new projects and existing buildings, Acoustic transparency, High strength and

security, Solid protection against access and Increased resistance to mechanical damage.

This kind of ceilings also helps in reducing carbon footprint through the use of cold treatment in the manufacturing process and the possibility of recycling.

Progress Eco offers the highest and consistent quality of products. Since 1996 it is confirmed by certified Quality Management System that complies with ISO 9001:2000 approved by Lloyd's Quality Assurance. Progress is a recognized brand, which enjoys the trust of our customers on domestic and international markets.

LIST OF CONTRIBUTORS

PANCALDI Pacchioni Laura pacchioni@pancaldi.net www.pancaldi-ceilings.com THE SKY FACTORY Jeff Johnson jeffj@skyfactory.com www.SkyFactory.com PROGRESS ECO S.A. Krzysztof Sieczko

August 2013

CEILUX ceiling designs CEILUX is a Belgian based company and offers a total solution, combining ceiling, lighting and design. Ceilux does not see lighting, ceiling and ventilation as separate elements, but uses an intelligent total concept as its starting point. A contemporary concept that integrates lighting and ventilation to achieve an optimal shop or work environment that allows for trouble free installation or repositioning at any later time.

Read more on this article at

http://www.constructionreviewonline.com

ksieczko@progressarch.com www.progressarch.com CEILUX NV Karel Vanhuyse k.vanhuyse@ceilux.com www.ceilux.com AGATA ZAJAC Metalltech Srl agata.zajac@metalltech.it www.metalltech.it 19

The future is built into all Bauer machines. We give research and development top priority. It’s not just our innovative drive that makes us number one in the world, but also because we offer customized system solutions that meet the highest quality standards.

www.bauer.de

Bauer. Technology to build the future.

NEW PLAYER IN THE BUILDING INDUSTRY, FOR SAFER, RELIABLE AND AFFORDABLE CONSTRUCTION EQUIPMENT EquiTrade is a Sales and Rental company established in Tanzania dealing in construction equipment and Specialised in SAFE, SECURE FORMWORKS and innovative building solutions.

Purchase from EquiTrade for SAFER, DURABLE, AFFORDABLE and TIME SAVING construction equipment.

Brand Patners:

EQUITRADE LTD

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info@equitrade.co.tz

www.equitrade.co.tz

+255 (0) 22 2865837 / 38 / 39

Fax +255 (0) 22 2865840

Dar es salaam, Tanzania

August 2013

Awards

sports trophies, medals, shields & plaques

Signs & Billboards

banners, illuminated signs road & safety signs, pylon signs, electronic signs, outdoor billboard led illuminated letters and signs digital printing, print & cut sticker, vehicle graphix & branding

Engraving

company seals, foundation plates, engraved signs our contacts:

makunganya street p.o. box 2564, dar es salaam, tanzania showroom: +255 22 21222807/2115140 cell: +255 754 310980, fax: 2115256 e-mail: info@tzsignwriters.com

www.tzsignwriters.com August 2013

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Chillers, Cooling & Refrigeration Systems

By Torah Onyango A chiller is a water-cooled air conditioning system that cools inside air, creating a more comfortable and productive environment. Chillers are also used in the manufacturing environment to provide "process" cooling to equipment in an effort to maximize productivity. Chillers are the single largest energy-using component in most facilities, and can typically consume over 50percent of the electrical usage. In these days of fluctuating fuel and energy costs, it has become imperative that a building owner manage the costs of cooling more effectively and efficiently.

LIST OF CONTRIBUTORS RC GROUP SPA Gianmarco Sola Sola@rcgroup.it www.rcgroup.it/EN SMARDT-OPK CHILLERS GMBH Lachlan Richmond-Smith lachlan.richmondsmith@smardt.com www.smardt.com FRILIXA Contact: Helena Pinheiro helena.pinheiro@frilixa.com www.frilixa.com AVA-COOLING Loriana Moncalvo lmoncalvo@ava-cooling.it www.ava.eu BALTIMORE AIRCOIL COMPANY Robert Downey info@baltimoreaircoil.eu www.baltimoreaircoil.eu 22

Using hybrid chillers and demand response chillers are just some of the ways of coming out on top and reducing the payback period of purchasing costs.

Chillers running inefficiently result in decreased equipment reliability, increased maintenance intervals and shortened lifespan. The slightest decrease in chiller performance can have a major impact on efficiency.

RC Group Spa They are 50 years old Italian brand with design and manufacturing facilities based in Italy, active in industrial air conditioning equipments manufacturing; they are subsidiary of DeLclima S.p.a and they have the widest product range market available in: Close Control Units for green data center and air conditioners for telecommunication shelter, Liquid Chillers, Heat pumps, Multifunction Units 4 pipes or 6 pipes With the product range we can largely serve most demanding request in the following market applications: Precision air conditioning for green data center, comfort heating and air conditioning and industrial process cooling.

RC Group product lines have always been remarket for the great attention to highest levels of efficiency and reliability and today their portfolio fully reflects this thanks to high tech components features they extensively use. This attitude has been derived by their intense, long and well established experience in data center cooling market, where efficiency and reliability are the key drivers; naturally they have introduced the same design criteria and approach on all production lines, including liquid chillers, heat pumps and multifunctional units 4 pipes/6 pipes for comfort and industrial market.

RC Group offers air cooled liquid chillers with indirect free cooling system;Series are EAGLE FREE, GLIDER FREE and MAXIMO. Free cooling is a cooling technique that allows the shutdown of the compressors when the outside temperatures are low, producing a considerable reduction in electric consumption for the air conditioning system. The indirect free cooling system consists in the partial or complete cooling of the chilled water of the existing cooling system with the outside air. The direct free cooling system consists in the direct entry of the outside air into the room, if the outside air has a lower temperature than indoor air.

They also offer many A energy class chillers;They are: SMILE HP; GEOPLUS; GLIDER; UNICO TURBO FL; FRIGO TURBO FL; FRIGO SCREW and A+ energy class chillers FRIGO SCREW with EER higher than 5,35. Energy Class A chillers has high energy efficiency ratio (EER). Air cooled liquid chillers obtain the A class for EER higher than 3,1. Water cooled liquid chillers obtain the A class for EER higher than 5, 05. A+ class is synonymous of even higher performance. The A and A+ energy class chillers offer a significant energy saving.

Smardt-OPK Chillers Gmbh Smardt oil-free centrifugal chillers offer the highest IPLV energy efficiencies and the lowest lifetime

Thanks to this approach, well introduced in RC Group since decades, they can show an important set of repetitive customers among most demanding ones in term of efficiency and reliability as international banks, telecommunication companies, broadcasting companies, airports, hotels, main industrial brands and so on.

August 2013

operating costs in their capacity ranges - 200 kW through 4200 kW in water cooled, and 200 kWthrough 1600 kW in air cooled.

The worldwide operations of the Smardt Chiller Group offer a greater depth of technical support and greater experience than anyone else in the world with oil-free centrifugal technology and its successful delivery of lifetime energy cost savings. Some of their products include the water cooled chiller range – 200 kW through 4200 kW – is designed for a 30-year operating life, with lifetime operating costs the lowest in the market. No oil, flooded shelland-tube evaporation, low power consumption, low maintenance costs (even lower with remote monitoring) and high reliability with only one main moving part.

Smardt and PowerPax work hard to achieve simplicity of design and operation – reflected in low operating costs and supported by the integration of PowerPax electronic expansion valves and the optional use of load balancing valves at very low loads. Field reliability since 2002’s introduction has been outstanding – not surprising when you consider that some 80percent of all chiller problems in the field are due to failures in compressor oil return.

from environmental corrosion towards the inherent long life of the other chiller components. Remote location of the condenser can be a preferred option in many applications. They can supply a full package if desired, or on a condenser less basis. Either way, full warranty applies to all components supplied and commissioned. In many climates, their prototype evaporative pre-cooling system can minimize air-cooled power consumption. This will be very efficient from both a first-cost and an operating cost perspective. Smardt’s R&D shows savings of over 30% for evaporative pre-cooling compared with normal aircooled operation.

Read more on this article at

http://www.constructionreviewonline.com

www.leister.com

TRIAC AT and TRIAC ST

And these chillers use no oil. The growing fraternity of Turbocor-trained engineers and technicians suggests that total maintenance costs for oil free chillers run at well under half the costs of traditional lubricated chillers.

This assessment may be very conservative. Air-cooled chiller range – 200 kW to 1600 kW. The Smardt air-cooled range offers the smallest footprint on the market, the quietest operation on the market (in both standard and low-noise configurations) and the highest air-cooled operating efficiencies on the market. Condenser coils use a W configuration to optimize heat rejection and footprint. Coils are baked and double-coated as standard with sealed edges as standard, to extend the coil’s physical protection

The new TRIAC hot-air tools from Leister stand out by their functional design and optimum performance. No matter whether digitally controlled (AT) or the standard version (ST) – we have the right tool for every application and user!

Somaso S.A, Morocco Chimibat, Algeria Revolon S.A., Tunisia Saad Hanna Sons, Egypt Irrico International Limited, Kenya Plasti-Weld, South Africa

August 2013

Hot air tools.

We know how.

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Valsir S.p.A. is the leading manufacturer of plumbing systems in Italy. The Company is part of Fondital Group, a major manufacturer with a turnover of US$1billion that employs about 2,600 people. ValsirS.p.A. supplies international markets with advanced made in Italy systems for drainage and water supply.

Valsir manufactures four lines of drainage pipes and fittings in polypropylene with push fits joints or in HDPE with welded joints.The most advanced lines areSilere systemthat boasts an exceptional sound absorption material and Triplus triple layer systemwith push fit joints; The drainage line is completed by wide, innovative and patented solutions in traps and siphons that suit all requirements and installation types; Valsir S.p.A. manufactures state of the art range of

exposed and in-wall flush cisterns (that features an elegant line of design push plates). The PEXAl-PEX of Valsir S.p.A., PEXAL and MIXAL, are the most advanced solutions for water supply. it includes a complete range of pipes and fittings for high and low temperature water, ideal for sanitary water, heating and cooling systems, compressed air, Fit to transport fluids up to 10 bar pressure and 95°C Temperature. Valsir Rainplus represents the most modern technology for the drainage of rainwater ensuring maximum performance, sustainability and money saving thanks to the patented inlet that is able to drain considerable amount ofrainwater, being the most efficient in the market. ValsirS.p.A. products have already been used with success and satisfaction in many important projects all around the world, such as:

HDPE Arzanah Medical Complex – Abu Dhabi (UAE) International Airport – Abu Dhabi (UAE) Crow Plaza - Abu Dhabi (UAE)

TRIPLUS Marina Hotel F1 - Abu Dhabi (UAE) Al Raha Beach Development - Abu Dhabi (UAE)

Valsir S.p.A. is now expanding its presence in the African Continent and search for reliable partners to import and distribute its products in SubSaharan Countries.

For more information, Visit the website www.valsir.com or write an e-mail to Dr. Mauro Fassina: mauro.fassina@valsir.it

Distributor wanteD We are looking for distributors in the territories of: • Tanzania • Kenya • Uganda • Rwanda

• Angola • Nigeria • Ghana • Zimbabwe

Please contact us at: +39 0365 877 011 or at: mauro.fassina@valsir.it

www.valsir.it MADE IN ITALY

OK_PAGINA_DISTRIBUTORI-AFRICA_ADDUZIONE.indd 1

15/05/13 11:52

Fulton Awards

Celebrating Excellence and Innovation

South Africa

Fulton Awards held every two years by the Concrete Society of Southern Africa recognises and rewards excellence and innovation in the use of concrete. The awards continue to celebrate the legacy of scientific and technological advances in the construction industry and Dr. Sandy Fulton’s life and achievements in the industry.

The 2013 awards featured six categories of entries; Civil Engineering Structure, Building Structure, Architectural Concrete, Community Structure and Innovative Construction. The awards are made symbolically to the structure and are presented to the entire team responsible for its construction, including the owner/developer, all professionals and the contractors.

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The 2013 winners were announced at a special gala dinner held in Drakensburg on the 8th.

June 2013, attended by 400 guests. President of the Concrete Society, Professor Billy Boshoff from Stellenbosch University, commended each and every one of the entrants. “The quality was exceptionally good”, he stated, “and it is once again an indication of the high standard of our local industry. We can really say that the innovation and excellence in these projects can be compared to any country in the world”.

The 2013 Commendations and Awards Architectural Concrete category: Commendation went to SANRAL Head Office and the Podium at Menlyn, while 115, West Street, Sandton;

Alexander Forbes was the winner. Sustainable Concrete Category: Commendation went to Koeberg Interchange and Gauteng Freeway Improvement Project (GFIP)-Packages E and E2 and the De Hoop Dam, nr.Steelpoort, Limpopo was the winner.

Innovation Construction Category: Commendation went to Mahatma Ghandi Road Sewer Gravity Extension Tunnel, Durban and Ultra-Thin Continuously-Reinforced Concrete Pavement and Continuously-Reinforced Concrete Pavement-N12 Freeway, Gauteng, while the Podium at Menlyn was the winner. Building Structure Category: Commendation went to 115 West Street, Sandton; Alexander Forbes and

August 2013

the SANRAL Head Office was the winner. Civil Engineering Structure Category: Commendation went to Ultra-Thin Continuously-Reinforced Concrete Pavement and Continuously-Reinforced Concrete Pavement-N12 Freeway and the Chota Motala Interchange Bridge, KwaZulu-Natal and the winner award went to De Hoop Dam, nr.

Steelpoort, Limpopo.

SANRAL Head Office: GBSCSA 4-Star Rated Building The new Sanral Corporate Head Office is situated in Vale De Grace, Pretoria. The project design responds to the tree lined suburban setting and incorporates the values and operational model of the client. It uses the architecture to express in some way what they do; make and manage the roads and bridges that form the connecting network that make our country work.

Conceptualized as a ‘connector building’, the use of concrete pays reference to flowing roadways and spanning bridges, the essential outcomes of Sanral’s engineering endeavours and the concrete green roof helps to integrate the building in its suburban context.

South Africa

Over and above the more conventional reason for using concrete (low maintenance and cost effective building solution), the use of a concrete structure and a concrete roof was that the visual and structural properties of concrete enable a reference to the flowing roads and spanning bridges that Sanral take such a pride in designing, constructing and maintaining. In addition, the use of concrete roof presents an opportunity to make a green planted roof and take advantage of the thermal mass properties of the green roof system to optimize the energy requirements of the building.

Additional special features of the concrete structure entail the exposure of the concrete as a finish of the building, dematerialization of the whole concrete frame structure, reduced cement use in line with GBCSA criteria, recycled steel reinforcing in line with GBCSA criteria and contribution of concrete structure to the GBCSA 4 star office design rating.

August 2013

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floor. In addition, a wide variety of natural materials were used, including bamboo veneer and wafer thin slate stone to clad the organic pods.

The development’s architectural design boast skylights made up of 12 giant like cones. They are 8.4 metres in diameter, floating above the atrium space like giant clouds, while the forms continue outside of the off-shutter concrete roof.

Scallops clad in Rheinzink, were constructed from a concrete structure which generated the form, clad in a timber sub-structure with vertical standing seam.

The architectural features of the atrium entail the off-shutter concrete columns which are 8.5 metre high, raked and moulded in a single cast.

115 West Street, Sandton: New Home for Alexander Forbes The iconic building situated on 115 West Street, Sandton is the new home to Alexander Forbes head office. The project utilized concrete in structural, architectural and artistic ways.

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The development is also designed to create a park-like environment with the introduction of 6 metre high ficus Benjamina trees, sunken into the

In addition, specialised formwork that was generated in Rivet and structures, was exported in AutoCAD dwg format and given to the subcontractor for construction, while the sizes were specified by the engineer and then sculpted by the architects and it included two types, a Y-shaped branch supporting the cantilevered walkaway and one that simply supporting.

CIVIL CONC EPTS C ONSU LTIN G

South Africa

The development is essentially an office building but includes a wide variety of staff facilities entailing a 200 seater auditorium, crèche, a gym, smoking rooms, prayer rooms (Muslim and Interdenominational), a beauty parlour, health studio, with physiotherapist, state-of-the-art AV meeting rooms, a multipurpose room, staff

training rooms, a fully integrated caterers kitchen and canteen, coffee shop, bar, wine cellar and 6 parking levels. The design warranted a flexible building hence the large floor plates, punctuated by two atria to maximise the natural daylight into the office spaces. The north-west orientation of the site also influenced the design with the powerful scallop elements to capture north and south light, while protecting the inhabitants from east and west light.

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August 2013

of GFIP projects consists of crushed stone or concrete pavements with asphalt overlays. New to the GFIP is the use of a “proudly South African� product called ultra-thin continuously reinforced concrete pavement that was utilised on GFIP, N12 upgrade.

The project was commended for its innovative and unique approach to the design of and research into concrete designs for construction of the concrete pavements. The resultant ultra-thin concrete proved to be of high strength (90MPa +), with a reduced number of movement joints, less brittleness by using steel fibres and provided better spreading of load due to the mesh reinforcement.

The advantages of concrete paving include more flexibility than the conventional concrete, lower life cost for comparable design, does not rut, shove or pothole, reduced maintenance, very low maintenance costs, labour friendly, can reduce storm water reticulation needed and only uses simple and inexpensive equipment.

In addition, skills acquired are not limited to road construction but are transferrable to the wider building and construction industry.

De Hoop Dam: One of the largest Roller Compacted Dams in South Africa The De Hoop dam is located on the Steelpoort River, in the Sekhukhune area, in Limpopo. The dam wall is approximately 1015m in length and 81m in maximum height.

was constructed of reinforced concrete. The dam wall contains around 1.125-million m3 of concrete of which 90% consists of Roller Compacted Concrete (RCC). The downstream wall rises in 1.2-m-high steps with the upstream side being vertical.

At full supply level the reservoir will cover the surface area of approximately 1690 ha and capacity of 347.6 million m3. The dam was constructed from Roller Compacted Concrete (RCC) and conventional concrete. The outlet works situated on the right bank between the spillway and the right bank non-overspill section

The dam is truly a flagship project for the Department of Water Affairs and is set to address a significant part of the future water needs of the Limpopo province. The projects demonstrating innovation and excellence made it difficult for the judges to select the winners amongst the many entries.

August 2013

29

South Africa

The product is a 50mm thick (relatively thin compared to the standard 150-220mm thick pavement), yet extremely strong, and needs little to no maintenance.

Eskom’s Green Plant on Schedule Medupi Power Station, a Greenfields coal-fired plant project located on the west of Lephalale, Limpopo Province, South Africa is currently under construction as part of Eskom’s new build programme set to address the electricity demand and supply challenges facing the country.

South Africa

The Greenfields coal plant project will comprise of six units with a gross nominal capacity of 800MW each, resulting in a total capacity of 4,800MW. The power plant utilises a super critical boiler and turbines, technology designed to operate at higher temperature and pressures than Eskom’s previous generation units for greater efficiency.

Medupi power station has been designed as a an environmentally friendly project as it utilises supercritical technology, direct dry cooling technology, flue gas desulphurisation, pulse jet fabric filters and low NOx burners, water and air pollution, air cooled condensers, and fauna and flora.

Since the plant will utilise the supercritical technology to improve the plant efficiency, the higher efficiency of supercritical boilers as designed for significantly higher steam temperatures and pressures resulting in better use of natural resources. It will result in burning less coal per megawatt leading to emission of less carbon dioxide and other gases into the atmosphere.

The plant also makes use of direct dry cooling technology which releases virtually no cooling water into the atmosphere providing a significant benefit in terms of water consumption. The power station is earmarked to use approximately 0.16 litres of water per kWh of electricity produced and this is expected to increase by 0.2 litres of water per kWh when the flue gas desulphurisation (FGD) plant is retrofitted to Medupi.

The project will also entail a Flue gas desulphurisation (FGD) as a retrofit and thus making it one of the environmental friendly coalfired power stations. It will also include pulse jet fabric filters and low NOx burners. The low NOx burners on its boilers are designed to minimise the production of nitrogen oxides in the furnace.

The plant is designed in a manner that seeks to mitigate air as well as ground water pollution and this will be achieved through the lining of the coal stockyard and ash dumps, enclosed mill bins and fully enclosed transfer houses with dust extraction systems.

In addition, the law grade steam exhausted from the low pressure turbines and temperature is sent to the air cooled condenser and is then pumped through the feed water heaters back to the boiler to start the cycle over again. The essential part of using this system is on condensing the steam in order to pump the water back to the boiler for reuse.

Since the project is constructed on an 883 hactare farm which was previously used for game and cattle grazing, a thorough nature conservation exercise had to be effected to preserve endangered species. Indigenous trees, snakes, birds, animals were relocated, and for instance trees were replanted at a special nursery at the adjacent Matimba Power Station.

In preserving the fauna onsite, the project put in place measures such as animal crossovers on the overland coal conveyor system to allow for the

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free movement. The project which commenced in 2007 has invested approximately R2.3 billion (US$201.4million) in infrastructure development in the Lephalale area and has seen the construction of 995 houses and buying of 321 houses, and building of a new pre-school, supply of medical equipment to the surrounding clinics, upgrading of the electricity infrastructure, construction of the Paarl sewerage treatment plant with R11.5 million (US$1.1million) spent on upgrading of the initial 2.2 km of the D1675 road leading to the site.

Eskom has continued to invest in the community and together with Exxaro they will spend more than R150 million (US$15.0million) in upgrading and repairing Nelson Mandela road as well as tarring Kuipersbult road.

The project has improved the lives of many in the region as 17,000 people have been employed at peak with 650 set to be employed permanently upon completion of the project.

The development, with an estimated budget of R98.9 billion (US$10billion) excluding interest during construction but including escalation and transmission integration costs, is set reach R125.5 billion (US$12.5billion) to complete. Recently, Escom revised the date the first of the six units of the plant are set for synchronisation from end of 2013 to the second half of 2014 with each of the remaining five units to be synchronised at approximately eight month intervals.

Once complete, the project will make use of the coal that will be delivered from Grootegeluk mine through an overland conveyor system to the Medupi coal stockyard. The conveyor as the sole supply line will supply 10,000 tons of coal.

August 2013

Kwikspace Modular Buildings Innovators in Turnkey Accommodation and Construction Site Solutions.

South Africa

Kwikspace Modular Buildings is a leading designer, manufacturer and erector of prefabricated buildings for deployment in Sub-Saharan Africa.

They have been accommodating their clients in oil & gas, power generation, construction, mining and government sectors for over 40 years and are one of the largest and most diverse suppliers of prefabricated buildings on the African continent.

They supply site-erected buildings, rapid deployment units and fully equipped shippedto-site structures, allowing their customers to manage projects and accommodate their people with varying degrees of urgency, demand and cost effectiveness.

All of Kwikspace buildings are assembled using fully insulated polyurethane injected panels, which provide temperature control and noise reduction far superior to standard prefabricated panels.

In 2012, Kwikspace was tasked with rolling out over 143 classrooms and 29 laboratories at 41 different schools in the Eastern Cape in a four month period.

Their factories in the cities of Johannesburg, Cape Town, Durban and Tete Mozambique allow them to respond quickly to projects in the SADC region as well as further along the West and East coast of the continent.

This region is notorious for its lack of infrastructure, little, or in some cases no roads and extremely rough terrain. Through dedication and efficiency, Kwikspace were able to deliver on not only the 1st phase but also a further 240 classrooms for the 2nd phase well within the allocated time.

They have their own professional logistics department which manages loading, transport, materials management and siting to support timely project progress.

Kwikspace also has the largest rental fleet on the continent with over 3000 units, from ablution, site accommodation and site office ready for deployment with in days of receiving the order.

Whether it’s a personnel camp, site office, classrooms, clinics or ablutions you need, Kwikspace has a speedy solution for your organisation – wherever the location and whatever the conditions. Their buildings can be ordered with air-conditioning, furnishings, burglar proofing, insect control, equipped kitchen andlaundries, further simplifying your project procurement processes.

The net result has positioned Kwikspace in the forefront of the industry and more specifically as a leader in the provision of accommodation.

For more information contact Kwikspace Modular Buildings (Pty) Ltd Tel +011 617 8000 or 087 806 9000 Fax +011 903 8993 www.kwikspace.co.za

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August 2013

Griggs&Griggs 2452

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HEAD OFFICE: P.O.Box 580 Kliprivier, 1871 • 32 Karee Kloof Rd. Waterval, Kliprivier, South Africa.

Tel: +27 11 617 8000 / +27 87 806 9000 • Fax: +27 11 903 8993 • email: sales@kwikspace.co.za BRANCHES: Cape Town: +27 21 905 9093 • Port Elizabeth: +27 41 486 3370 • Durban: +27 31 700 2834

BBBEE LEVEL THREE COMPANY

South Africa

Palabora Mine Company (PMC) Continues to Implement Growth Strategies Palabora Mining Company (PMC), a large copper, smelter and refinery situated in the Limpopo Province of South Africa is currently working on the growth strategy that will see the company extending the life of the mine and increasing the magnetite exports.

After completing lift one, the company embarked on the pre-feasibility study for Lift 2, which enhanced the understanding of the optimal business and technical options for the transitioning to Lift 2.

The twin heading decline development is on schedule, with a targeted completion in the second quarter of 2014. The associated airway development and infrastructure work is also progressing on schedule and the organisation associated with decline and infrastructure construction now exceeding 250 project personnel.

Magnetite The R128 million (US$12.8million) new belt filter plant is set to increase the production and the drying capacity of magnetite in anticipation of continued trucking activities and the easing of the rail constraints. The company has been successfully pursuing magnetite expansion to benefit from market prices and export demand.

Historically, the magnetite has been taken from the existing processing plant and dried on the magnetite stockpile in ponds through a process of evaporation. The method is slow and subject to the forces of nature and also limiting the quantity of high-grade magnetite that can be produced for export.

The belt filter should be commissioned in 2013.

An additional R170 million (US$17.1million) has been approved for the upgrade of the Magnetite

Separation plant, that will process and upgrade the magnetite from a 58 percent iron oxide grade to 65 percent magnetite grade.

PMC is working closely with the IDC and IMBS Iron technology in order to see its iron beneficiation project becoming a reality and the third party of IMBS plant is on construction phase. It is set to initially take 80 kt of magnetite per annum, eventually ramping up to 800kt.

Smelter Considerable work has been undertaken to assess future technical options regarding copper processing, since smelter requires targeted engineering solution to maintain its full compliance with the new South African Air Quality Regulations.

For all your Corporate and Leisure travel requirements Tel: 015 781 2498/7761 I Fax: 015 781 5235/7767 www.suretravel.co.za www.turnkeytoursphalaborwa.blogspot.com www.facebook.com/Turnkeytravel 36

August 2013

groundwater levels) or 100m in areas where de-watering has taken place or where the local authority has no jurisdiction or control over groundwater levels (SANS 1936).

Approximately 25% of Gauteng is underlain by dolomite land, including the West Rand District Municipality, Tshwane Metropolitan Municipality, Ekurhuleni Metropolitan Municipality, Johannesburg Metropolitan Municipality and Sedibeng District Municipality.

A sinkhole is defined as a feature that occurs suddenly and manifests as a hole in the ground that is typically circular in plan (SANS 1936).

A subsidence is defined as a shallow enclosed depression that occurs slowly over time and may typically be circular, oval or linear in plan (SANS 1936). In South African literature in the pasta subsidence as defined above, was synonymous with the termdoline (SANS 1936). In terms of size, sinkholes and subsidences are defined as: Small (<2m diameter), medium (2m to 5m diameter), large (5m to 15m diameter) and very large (>15m diameter) (Buttricket. al., 2001).

Rehabilitation of sinkholes South Africa

and life threatening hazards related to dolomite

By Ilse Kleinhans Engineering Geologist/ VGIconsult Projects (Pty) Ltd Sinkholes and subsidences on dolomite in the highly populated Gauteng Province of South Africa mainly started to appear in the late 1950’s to early 1960’s, with the earliest sinkhole recorded in 1938 (Richardson, 2013). Statistical analysis conducted in 2012 for the period prior December 2011 revealed that over 2500 dolomite instability features are recorded within the Gauteng Region (Richardson, 2013). The occurrences of these

instability features had and still have a detrimental impact on infrastructure or loss of life. In the past fifty years 39 people lost their lives, during the time period 1962 to 1980, due to the formation of sinkholes and damage to infrastructure has exceeded R 1 billion (Buttricket. al., 2001).

Dolomite land is classified as land underlain by dolomite or limestone rock directly or at depth typically no more than 60m in areas where no de-watering has taken place (provided the local authority is monitoring and has control over the

Causes of sinkhole or subsidence formation Sinkholes and subsidences may occur naturally or be induced by man’s activities. Natural occurring sinkholesare typically formed due to collapse of an air filled cave roof. Sinkholes and subsidences induced by man’s activities relate to development, causing the transportation of the overlying in situ materials into cavities or voids located within or above dolomite bedrock.

These activities include:Water ingress: Leaking wet engineering infrastructure, including water, sewer and stormwater; ponding of stormwater;alteration of natural drainage patterns, etc. The disturbance of the upper-soil horizon during the placing of subsurface services may leave behind a more permeable backfill than the original more impervious soil profile allowing for easy infiltration of surface water.

Artificial groundwater fluctuation, drawdown and dewatering; where the natural groundwater level had been drawn down to a level exposing cavernous areas in rock or voids in the overburden above dolomite bedrock; mainly by means of excessive groundwater abstraction for agricultural use or mining activities.

It should be noted that the potential for natural occurring sinkholes and subsidences are low in an undeveloped area, whilst those caused by human activities are high, especially within the following environments (Buttricket. al., 2001): Highly susceptible conditions comprising poor subsurface conditions e.g. presence of weathered dolomite in the form of dolomite residuum (manganiferous soils/wad) regarded as highly compressible and insoluble material; cavities or

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August 2013

cavernous conditions and sample and/or air loss recorded during drilling.

In addition, previous sinkhole or subsidence formation recorded within area; Existence of palaeo-sinkhole or palaeo-subsidence structures;areas of geological contact and fault zones; the presence of a shallow dolomite groundwater level, above dolomite bedrock, that may be subjected to drawdown exposing deeper lying cavities or voids; poor management and maintenance of wet engineering infrastructure.

Rehabilitation of sinkholes and subsidences The first priority when a sinkhole or subsidence is reported is to ensure the evacuation and barricading of the affected area to prevent loss of life, followed by the temporary repair of the leaking wet service (if subsurface conditions allow safe entry) to prevent enlargement of the sinkhole or subsidence size.

A dolomite stability investigation follows consisting typically of a gravity survey and the drilling of percussion boreholes to determine the subsurface conditions, the most appropriate rehabilitation process to follow and the extent of wet services to be replaced.

Methods of sinkhole and subsidence rehabilitation used in South Africa The typical methods of sinkhole or subsidence rehabilitation used in South Africa include: inverted Filter Method: Backfilling of the sinkhole including - blocking of the throat of the sinkhole with rockfill and/or boulders or the use of self-compacting concrete, followed by layers of progressively finer material, compacted at a specific compaction effort to create an impermeable cappin.

Compaction Grouting: Where a mix of sand, cement and water is pumped under a specific pressure (as specified by the investigator) into cavities at depth to fill the opening or to densify the subsurface soils; and dynamic Compaction method: Material are placed typically in lifts of 2m, followed by dynamic compaction where a large weight known as a pounder is dropped from a considerable height onto the soil to be compacted and densified.

The specific method or combination of methods used to rehabilitate a sinkhole or a subsidence will depend on the subsurface conditions encountered, accessibility for equipment and the impact of the rehabilitation procedure on existing infrastructure. For example the Dynamic Compaction method may cause structural damage if performed too close to existing structures and compaction grouting may cause heave if pumped under too high pressures close to surface.

South Africa

Each sinkhole or subsidence is unique and a specific set of criteria for rehabilitation of the feature are developed to ensure proper rehabilitation and the future use of the area.

Geotechnical Drilling & Investigative Specialists JK Developments specialises in Geological Investigations with extensive experience in the extraction of information from Dolomite areas.

Serving the construction and mining industries, we offer a wide range of services such as:

• Dolomite stability investigations.

• Sinkhole investigations.

• Water monitoring boreholes and fitting of Piezometers.

• Burrow pit investigations.

• Pilot holes for core drilling of bridge and building piles.

• Specialist sampling in mining applications.

The rehabilitation of a sinkhole or a subsidence is time consuming when done correctly and can take between a month to even up to a year, depending on the size and depth of the affected area. Apart from the cost implication related to rehabilitation, consequential costs such as negative impact on an existing business or where temporary roads need to be constructed in order to ensure traffic flow around the area of rehabilitation etc.

The development of sinkholes or subsidences can be greatly reduced by ensuring appropriate development in accordance with industry standards as set out for the development of areas on dolomite land, maintenance and upgrading of existing wet services.

August 2013

Phone: +27 ( 0 ) 12 668 9905/6 Mobile: +27 ( 0 ) 82 554 9443 Fax: +27 ( 0 ) 12 668 9907 Email: info@jayk.co.za w w w. j a y k . c o . z a

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Rural Electrification Improves Development The South African government set a universal access to basic electricity for all its citizen by 2012, and the responsibility for achieving the objective lies with Eskom SOC, South Africa’ s power utility company in conjunction with local municipalities and the target is the rural communities.

Prior to 1990, less than a third of the population had access to electricity and the 1996 census indicated that only 58 percent of the country’s population lived in formal housing, around 60 percent had access to piped drinking water, 58 percent had access to electricity, and only one in four non-black South African households was electrified.

However, life is getting better for many South Africans with each passing day as access to basic services have become a reality, through efforts that the government has embarked on, such as

As of March 2011, Eskom had connected four million rural customers as part of the INEP, which government introduced to coordinate electrification in the country. This has brought the overall level of rural electrification in South Africa from 36 percent in 1994 to 83 percent household connections currently.Rural electrification has increased from 12 percent in 1994 to almost 60 percent at the moment. Further, more than 11, 000 schools have been electrified and 400 clinics have also been electrified since 1991, allowing for better quality of services to thousands of South Africans who access these facilities.

Considering population and household growth, the switch-on of the fourth-millionth connection is a significant achievement against a continuously moving target. Government and particularly, Eskom, continue to consider options and innovative ways to get electricity to communities and households that do not have electricity quicker and more cost- effectively.

Challenges There have been challenges in the process, which include the increase in costs for connections for

instance due to accessing the households as the roll- out gets to sparsely populated areas amongst others. Challenges remain in ensuring that all households have access to electricity (government’s goal for 100 percent access).

About 3.4 million households remain without access to electricity. About 20 percent of these are in the Eastern Cape.

Government has allocated more than R3.1 billion (US$302 million) towards reducing households who remain un-electrified, of which about R500 million (US$50.3 million) is allocated to Eskom to implement in the Eastern Cape.

There is a greater need for improved coordination between implementing agents, particularly Eskom and municipalities, in light of the challenges that some of the municipalities face in implementing electrification projects. Eskom is putting together a framework within which they can work with municipalities, particularly the ones that are struggling to, amongst other things, achieve greater improvement in increasing electrification connections. Government is attending to backlogs which exist in KwaZulu-Natal, the Eastern Cape, and Gauteng as well as certain areas in and around the eight metropolitan municipalities.

© CM 040211CG

South Africa

The electrification of homes can be split into four broad categories which are deep rural: less than 70 homes per square kilometre and between 50 and 120kW per square kilometre; rural: 70 to 150 homes per square kilometre and between 50 and 120 kW per square kilometre; peri-urban: 150 10 750 homes per square kilometre and load densities are generally between 120 and 750 kW per square kilometre; and urban: greater than 750 homes per kilometre and load densities are upwards of 1000kW per kilometre.

the free basic energy (FBE) programme - low income households are eligible for 50kWh of free electricity per month, ensuring that they also benefit from the Integrated National Electrification Programme (INEP).

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August 2013

UNABCEC

Celebrates Twenty Years

F.X Mubuuke - Executive Secretary UNABCEC

Uganda

Uganda National Association of Building and Civil Engineering Contractors (UNABCEC), is a non-profit, non-political, private sector umbrella business association that brings together contractors engaged in building, civil engineering as well as manufacturers /suppliers of construction related materials. It was registered in 1993 as a limited company by guarantee without capital under the companies Act (CAP110) to represent and promote the interests of its members.

Structure UNABCEC is a voluntary association of member companies bound by the memorandum and articles of association and code of conduct authorized by the Annual General Meeting (AGM), the supreme organ of the association. It has a National Executive Committee (NEC) elected by the AGM every two years, while daily activities of the association are executed by the Secretariat headed by the Executive Secretary.

UNABCEC therefore is deservedly celebrating 20 years of existence this year. For the last ten years, Mr. F.X. Mubuuke has been UNABCEC Executive Secretary and Construction Review interviewed him and here below are some excerpts from that interview:

It collaborates closely with stakeholders within the construction industry such as Government entities, like the Ministry of Works and Transport,, Uganda association of consulting Engineers, Private Sector Foundation Uganda (PSFU), Uganda Manufacturers Association (UMA), Federation of Uganda Employees (FUE), the African Federation for contractors Associations (AFCA), Uganda National Roads Authority, (UNRA), the Public Procurement and Disposal of Public Assets Authority (PPDA), CrossRoads Programme etc. among others.

Brief on UNABCEC The association was founded in the early 1970’s but due to political turmoil, it went into hibernation till 1993 when it was revived and registered. Since then it has grown and thrived.

Role of UNABCEC UNABCEC role encompasses identifying, promoting and safe guarding the interests of its members, promoting construction industry development as well as promoting fair and ethical business in the industry.

Mission and Vision UNABCEC Vision is to be the lead engine for growth and development of the construction industry in the region, while its Mission is to promote and protect the shared interests of members and industry through mobilisation, advocacy, networking and innovative service provision.

UNABCEC core values are professionalism, client orientation, integrity and inclusiveness UNABCEC objectives include: Undertaking policy advocacy with government on key challenges for the construction industry, Providing a forum for discussing policy issues and impact thereof

Civil & Building Contractor Featured Services • Building & Civil Works • Electrical & Mechanical Installation • Mechanical & Carpentry workshops Plot 231, Gayaza Road - Kitetikka | P.O. Box 33517, Kampala, Uganda Tel: +256 (41) 4381192 | Fax: +256 (31) 2512113 Mob: +256 (78) 2231240, +256 (71) 2471677 E: admin@khalsadevelopment.com | www.khalsadevelopment.com

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August 2013

UNABCEC and the construction industry in Uganda Mr. Mubuuke says the construction industry in Uganda has not properly been regulated hence the frequent spates of shoddy work and collapsing building works, among others. The National Construction Industry Policy (NCIP) endorsed in January 2010 by Cabinet and the Uganda Construction Industry Commission (UCICO) Bill to provide for oversight over the construction industry by operationalizing the NCIP is yet to be enacted into law by Parliament.

We offer services in the field of: • Water supply systems for community and production • General buildings construction and renovations • Periodic maintenance and Rehabilitation of unpaved roads • Engineering designs

CONTACTS P.O Box 31227 Kampala - Uganda Tel: +256 414 347 136, +256 772 595 632 email: info@palmconstructionug.com

Uganda

on the constructing industry, Promote networking and improve range of services to members, To develop a code of conduct and quality standard for the construction industry, to prevent disability and cater for the already disabled workers by providing accessibility at the work sites, To prevent and fight HIV/AIDS and support affected/infected workers, To ensure united action and joint bargaining on issues of common interests with cartels, government or any other organisation, To develop a dispute resolution mechanism, To identify, develop and promote business opportunities for members and promote occupational health and safety at work sites.

Achievements over the years The association has over the last twenty years advocated for the interests of its members, promoted contractors’ visibility and represented them at Government and other fora andhas constructed a modern permanent office within UMA Show Grounds that houses the association’s Secretariat and formulated the 2010-2014 Strategic Plan to guide its activities and services to its members.

Projects undertaken in the recent past The Occupational Health and Safety Environmental Program.

This was aimed at sensitizing members and their workers, about safety and health at the work place, train them about initiation and maintenance of occupational health practises as well as develop and sustain a health and safety culture to promote increased productivity.

Pro invest project This 18 months project funded by the European commission was aimed at capacitating UNABCEC and UACE members among others. It was aimed at improving the institutional and functional competence, and assisting the association to engage in meaningful public private dialogue on selected key policy issues and to put in place international cooperation and regional integration.

7 weeks heavy construction plant operators’ intensive basic training course. Funded by GIZ/ PEVOT under a PPP arrangement with UNRA and MANTRAC 20 plant operators from 20 member companies were trained so as to address the huge challenge of the critical shortage of heavy construction equipment operators.

August 2013

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Challenges UNABCEC just like any other private sector association has had its fair share of challenges. The mother of all the challenges the association has faced is absence of regulation of the construction industry. Secondly, the low capacity of contractors prevents them from taking up big value Jobs. Hence Ugandan contractors usually relegated to sub contracts.

Test Pumping

Wind mill pumping water.

This challenge is coupled with the lack of skills and experience in specialised trades like building dams etc. There is also lack of continuous job opportunities for contractors. Contractors stay idle for long periods in between jobs,. High

CRI Pumps

costs of finance and delayed payments are yet another challenge.

Construction of RCC Water Reservoir.

Construction of complete Pumping Stations Mbarara Barracks Water Supply

Integrity, Deligence and undying quest for challenges Kirloskar Green Power Generators

Ground Water Geological and Geophysical Investigation Ground Water Drilling Piped Water Supply Systems Remote Sensing and Gis CRI Water Pumps CRI Submersible Pumps (Generators (5KV-500KV Custom Built Water Well Drilling Rigs And Accessories Genuine Spares for Ashok Leyland

In addition, unpredictable price escalation of products used in construction is a great concern as it blows contractorsâ&#x20AC;&#x2122; construction budgets out of proportion. Finally, there are no institutions for training high skilled heavy machinery operators in Uganda since Namalere was closed and Busitema was upgraded into Busitema University. Thatâ&#x20AC;&#x2122;s why foreign operators of heavy construction equipment like Chinese and Philipinos are a common sight in Uganda.

Future plans

is recognised by the Ministry of Cooperatives & Rural Development, the Directorate of Water Development Republic Republic of Uganda,Department of Space, Government of India and Government of Southern Sudan (GOSS)

UNABCEC has plans to build a construction Training Institute. Plans for this high value project are advanced and while resources are being mobilized,

Uganda

land for it has already been identified. This institute will provide instruction for mechanics, supervisors and operators of heavy construction equipment.

certified firm with a 10 year history of Quality Building Construction.

We specialize in Design and Build, Building Construction and Civil Works.

Our well equipped workshops also deliver quality Carpentry & Joinery products,all kinds of Welding & Fabrication, Pre-cast units and Concrete Blocks.

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August 2013

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