Construction Review Africa by Construction Review

Since 1989

May-June 2020, Vol 31 No.3

Lideta Mercato Addis Ab Addi Ababa, b Ethi Ethiopia i Geosynthetic technology Construction health and safety Painting a commerical building

Grundfos provides solution for pumping boiling underground water for surface usage. Grundfos was approached to provide a solution to bring 82°C groundwater to the surface in the Afar Region covering the north-eastern part of Ethiopia, one of the harshest and difficult environments on earth. This specific water-intensive project was located close to Erta Ale, a continuously active basaltic shield volcano situated in the Afar Depression, a typical Badlands desert area. Erta Ale is the most active volcano in Ethiopia and is famed for its persistent lava lake which has been active during most of the past decades since it was first discovered in the 1960s. Defence Construction Enterprise was awarded a road upgrade project in the area. This roads project required an extensive amount of water as it was constructed out of asphalt concrete. Concrete generally requires a lot more water for preparation, in comparison to the typical petroleum-based asphalt previously used. Heated by the active basaltic volcano, only boiling groundwater is available in the area, making it difficult to extract for above ground use. Grundfos was able to provide a reliable solution that made it possible to pump the 82°C boiling water to the surface from a 430m depth borehole for usage in the roads project. “Our customer Defence Construction Enterprise has used several other solutions; however, they didn’t last

long enough to be productive,” says Grundfos Country Manager of Ethiopia, Maru Necho. Grundfos offered an SP60-13 6” borehole pump constructed of EN1.4401 (AISI 316) stainless steel fitted with a 26kW rated motor, constructed of high alloyed austenitic stainless steel (1.4539 (UNS N08904 - 904LSS2562) with very good corrosion resistance. A control panel fitted with specialised temperature sensors was installed for protection of both pump and motor. For the first phase of the roads project, Grundfos was able to provide solutions and products for two boreholes and are currently attending to more application sites for the next phase. “As providing solutions is a big focus for us in Grundfos, I contacted various engineers for advice. We worked together looking at every technical aspect and came up with a solution,” says Maru Necho. During the project, the community could use the water in parallel with the project and after completion of the roads project, all boreholes were handed over to the communities in the area. Defence Construction Enterprise was extremely satisfied with not only the result but how Grundfos was able to supply tailor-made solutions for the project needs and in an accessible timeframe.

Grundfos provided a reliable solution that made it possible to pump 82°C boiling water to the surface from a 430m depth borehole

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Trademarks displayed in this material, including but not limited to Grundfos, the Grundfos logo and “be think innovate” are registered trademarks owned by The Grundfos Group. All rights reserved. © 2020 Grundfos Holding A/S, all rights reserved.

WASTEWATER NETWORKS:

MANAGING EDITOR Robert Barnes DEPUTY MANAGING EDITOR Francis Makari EDITOR - in - CHIEF Dennis Ayemba COUNTRY EDITORS Uganda -- Betty Betty Nabakooza Nabakooza Uganda Nigeria -- Boladale Boladale Ademiju Ademiju Nigeria South Africa Africa -- Jimmy Jimmy Swira Swira South WRITERS, WRITERS Pascal Musungu, Musungu, Anita Anita Anyango, Anyango, Pascal Patrick Mulyungi Mulyungi Patrick

In this issue we look at Lideta Mercato a shopping mall in Addis Ababa Ethiopia.

The project was named the worldâ&#x20AC;&#x2122;s best shopping centre according to the Prix Versailles

Lideta Mercato Addis Ababa, Addi Ab b Ethiopia Ethi i Geosynthetic technology Construction health and safety Painting a commerical building

Vol 31 No. 03

South Africa: Rachel Molapo, Winnie South Africa: Thuli Nkosi, Winnie SentSentabire, Angeline Ntobeng abire, Angeline Ntobeng,

Since 1989

May-June 2020, Vol 31 No.3

May-June 2020

ADVERTISING ADVERTISING Kenya: William Mutama, Joyce Kenya: William Mutama, Lilian Khavosa, Ndamaiyu, Lilian Khavosa Joyce Ndamaiyu, Wendy Kinya

Current Issue Construction Review

WEB & & GRAPHIC GRAPHIC DESIGN DESIGN WEB Gerald ArnoldOswald Oduor Sales and Marketing Manager Sales andFaith Marketing Mburu Manager Faith Mburu

CON

Uganda: Uganda: Nobert Nobert Turiyo, Turiyo, Selina Selina Salumah Salumah Namuli Namuli Botswana: Botswana: Dickson Dickson Manyudza, Manyudza, Gerald Gerald Mazikana Mazikana Ethiopia: Ethiopia: Haimanot Haimanot Tesfaye, Tesfaye, Ruth Ruth Girma Girma Tanzania: Tanzania: Tom Tom Kiage Kiage Malawi: Malawi: Anderson Anderson Fumulani Fumulani Ghana: Ghana: Samuel Samuel Hinneh, Hinneh, Caleb Caleb Donne Donne Hadjah Hadjah

REGULARS Editor's Comment 3

Zambia: Susan Kandeke Zimbabwe: Chiedza Chimombe Rwanda: Collison Lore

Corporate News 4

Nigeria: Seni Bello China:Weng Jie

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 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. ÂŠ All rights reserved.

Events 5 Management 6 cover story: Lideta Mercato; Voted worlds best shopping centre

Construction site maintenance strategies 6 Geosynthetics: An African perspective

Precast Concrete: Working with the Technical University of Kenya

Monopole Masts: A case study in Ethiopia

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TENT

Editor's Comment

Self supporting Monopoles

Renewable energy benefits from COVID -19 containment measures

A case study for the use of self supporting monopoles instead of lattice stype pylon structures in a large

The current Covid-19 pandemic is truly a global health crisis. As of 15th June, there were over 7.8 million confirmed cases and over 430,000 deaths due to the illness. As a consequence of efforts to slow the spread of the dreaded virus earlier in the year, the share of energy use that was exposed to containment measures jumped from 5% in midMarch to 50% in mid-April.

transmission and distribution project in Ethiopia

According to the Global Energy Review 2020 by the International Energy Agency (IEA) beyond the immediate impact on health, the current crisis has major implications for energy use. Global energy demand declined by 3.8% in the first quarter of 2020, with most of the impact felt in March as confinement measures were enforced all over the world. Demand fell for electricity sources including coal, gas and nuclear power.

Geosynthetics A detailed look at uniquely suited geocells for the African environment and their advantages in offering higher bearing capacity and lower stress resulting in extended service life

14 Water well drilling: Dewatering a mine in Congo

Painting: What to consider for commerical buildings

Health and safety: A look at the construction industry

However, according to the report renewable energy is the only source that posted a growth in demand, driven by larger installed capacity and priority dispatch. Demand reductions have lifted the share of renewable energy in the electricity supply, as their output is largely unaffected by demand. Furthermore, demand for renewable energy is expected to increase even more because of low operating costs and preferential access to many power systems.

Laser Property Services: The new Nova Academy Development in Eldoret

Cell: +251 930 099 152 Email: ethiopia@groupafricapublishing.com Ghana Agent Image Consortium 1st Floor, The Ecobank Building, Tesano. Tel: 233(0)30 223 2728 I 233(0)274807127 I +233(0)206299159 Fax: 233(0)24 882 8286 Email: ghana@groupafricapublishing.com, Calebhadjah@gmail.com Kenya Agent Northwest Ventures Ltd P.O. Box 16414 - 00100 G.P.O Nairobi, Kenya

May-June 2020 Volume 31 No.3

Robert Barnes

Tel: +254 20 2679808 Email: kenya@constructionreviewonline.com, info@northwest.or.ke Nigeria Agent Rahma Associates B23/24, Aishetu Emoewa Plaza, 196, Iju Water Works Road, Ifako Ijaye Lga,Agege, Lagos. Tel: 234-1-7347860 Email: nigeria@constructionreviewonline.com Rwanda Agent Kolline & Hemed Inc., B.P. 3328, Kigali, Rwanda E-mail: rwanda@constructionreviewonline.com

Zambia Agent Dayflex Limited, Dedan Kimathi Road, Lusaka, Zambia. Email: zambia@constructionreviewonline.com

Tanzania Agent: Group Africa Publishing Ltd tz@constructionreviewonline.com Dar-es-salaam

CORPORATE NEWS

Solarising Hand Pumps: Solutions from Davis & Shirtliff Davis & Shirtliff has developed an ideal alternative in the Dayliff range of solar pumps and accessories. At the heart of the systems is the wide range of the economical and efficient Dayliff Sunflo solar pumps that are supplied in complete kits that include the PV modules, pump and all accessories for a complete installation, with power requirement being as low as 150W. The standard range provides outputs from 1 to 12 m3 per day at heads up to 70 metres with other options being available. However, for the majority of hand pump installations, lower heads are more common. Also required in a solar pumping installation is a tank and small tower for continuous 24-hour water availability that provides the option of direct supply to points of use. Dayliff has also designed a special tank and tower solution with capacities up to 3000 litres that are very cost-effective, light and easy to install with the option of the PV modules mounted on the tower for smaller installations. The benefits of this new solution are huge with capital costs of the pumps being lower than traditional hand pumps and providing totally cost- and maintenance-free operation – systems simply start with the sun and pump all day! For more information, visit https://www.davisandshirtliff.com/

K-Tec Earthmovers and Ashland Industries Merge

Ritchie Bros. eases cash flow for equipment owners

K-Tec Earthmovers Inc. and Ashland are leading manufacturers of earthmoving scrapers and accessory products serving the construction, mining, and agriculture markets. The merger of the companies will allow them to offer the broadest product line of earthmoving scrapers in the industry with the largest geographic footprint of dealers in the United States to provide exceptional service coverage. The combination will provide shorter lead times for customers and accelerated product design and introduction. There will be no management changes at either company as a result of the merger.

Heavy equipment auctioneer Ritchie Bros. supports equipment owners through the COVID-19 crisis with flexible disposition options to improve their cash flow, including advance payment options and purchasing seller assets outright. While most people are isolating at home during the coronavirus pandemic, the world of heavy equipment auctions is still turning. Industry leader Ritchie Bros. has taken all its auctions online and has so far seen very little change in anticipated demand – or selling price levels – for secondhand construction and agricultural machines over the last few months. “Despite these uncertain times, we’re hearing from customers that there is still lots of work going on in the world – maintaining highways, power, and telecommunications, water, and sewerage systems, as well as transporting groceries and medicines – and we provide the equipment to companies delivering these essential services,” says Karl Werner, International President at Ritchie Bros. “The regular in and outflow of fleet management does not stop and we’re here to help, with a variety of sales solutions and contract options to suit any need,” he added. Over its 62-year history, Ritchie Bros. has become a trusted advisor in the industry, with millions of clients around the globe counting on the valuable insight it provides.

“In the weeks leading up to the announcement, the K-Tec and Ashland teams met several times and it was apparent that all of us could not be happier with the “fit” of the two companies,” said President, Mike Palitsky. The merger creates one of the largest companies in the industry. The newly merged organizations will be headquartered in Rosenort, MB, Canada and led by Mikhail (Mike) Palitsky, President of K-Tec. The combined business will have manufacturing and service locations in both Rosenort, MB, Canada and Ashland, WI, USA.

Alpla builds new manufacturing plant in Lanseria, South Africa Austrian packaging manufacturer Alpla is building a new production site near Johannesburg which will combine activities from five existing plants. As part of the consolidation, the production of five existing plants in Harrismith, Denver, Isando, Kempton Park and Samrand will be transferred to the new plant in Lanseria.

Alpla's new production facility to be built near Johannesburg 4

CR | May-June 2020

Located in the province of Gauteng, the factory aims to simplify and optimise manufacturing processes while also contributing to improving logistics and transport. Standard bottle solutions and tailor-made packaging for the food, personal care, home care, chemical, detergent and pharmaceutical industries will continue to be manufactured at the new plant. Expanding market presence in Africa In the past five years, Alpla has significantly expanded its market presence in Africa with several acquisitions, in particular, South-African based Boxmore Packaging, which specialises in creating PET bottles, PET preforms and closures for drinks bottles. With the construction of a new production site in South Africa, Alpla aims to create long-term growth and competitiveness in the Sub-Saharan African region. “Our new plant in Lanseria gives us the opportunity to produce according to modern, globally applicable corporate standards. In this way, we not only improve the quality of our products but also meet the high demands of our global customers”, said Christoph Riedlsperger, Alpla regional director for Africa, the Middle East and Turkey. As part of the consolidation, the management contemplates that more than 50 employees would be impacted. Construction for the new plant began in February 2020 and is expected to be completed by summer 2021. www.constructionreviewonline.com

EVENTS

2020 Junior Indaba postponed

11th Addis Build: 14th – 17th October, 2020

Ghana Electricity Expo: 10th – 12th November, 2020

Due to the COVID-19 (Coronavirus) pandemic, a decision has been made to postpone the 2020 Junior Indaba to 3rd and 4th November.

Growing as a regional power in Western Africa with its upward trending economy thanks to its rich gold reserves and the discovery of the oil in 2007, The 2020 Junior Indaba will take a critical electricity and energy holds a crucial place in Ghana’s view of both the state of play in South economy. Africa and the exploration and junior mining ‘hot spots’ in the rest of Africa. Local and international experts will give their views on the latest political, economic and regulatory developments and why certain regions are succeeding in achieving a thriving exploration and junior mining sector. Panel discussions will focus on such themes as the demand and future role of coal in the African energy markets; which commodities are hot this year; the impact of 4IR and the transition to a low-carbon economy on junior miners; and how local and international investors view the risks and challenges of junior mining.

Through a power project initiated by American multinational conglomerate General Electric (GE), the Ghanaian government aims to create what would be sub- Saharan Africa’s largest power park, providing more than 1000MW to the national grid once completed. In 2020, Addis build is going to be

organized for the 10th time on 14-17

Ghana thus offers tremendous opportunities for October. Join now and benefit the great international investors aiming for a significant share trade and investment opportunities in in the giant projects to be realized and in the country’s Ethiopia and East Africa. energy industry. Addis build is an international exhibition organized by Ethel Advertising. This exhibition creates a platform for international companies to meet with the private sectors, government offices & institution and industry professionals that is essential for the growth of the construction sector.

Junior Indaba which is known for its straight talk will take place at the Country Club Johannesburg, Auckland Park, on 3rd & 4th November 2020.

Kenya

- Ethiopian Association of Civil Engineers

- Institute of Engineers of Kenya

Nigeria

- Construction Contractors Association of Ethiopia

- Association of Consulting Engineers of - Kenya - Association of Professional Societies of East

- Association of Consulting Engineers Nigeria

Zimbabwe

Africa APSEA)

- Association of Professional Women

- Zimbabwe Institute of Quantity Surveyors

- Kenya Property developers Association

- Zimbabwe Institute of Engineers

- Institution of Surveyors of Kenya

Association Partners

and Quantity Surveyors (AQSRB)

- Association of Ethiopian Architects

- Institute of Quantity Surveyors of Kenya

South Africa - ASAQS

- Tanzania’s Registration Board of Architects

Ethiopia

- Architectural Association of Kenya

- The Construction Industry Federation of Zimbabwe (Cifoz)

- SAICE

- South African Council for the Quantity

Organized annually since 2010, Addis build is the longest standing construction event in East Africa. Due to the regular increase in exhibitor and visitor numbers, Addis build has a lot to offer for networking and finding business leads. Being just right in the action, the Addis build has always been the primary choice of international companies seeking to make business in Ethiopia.

Surveying Profession

Ghana - Ghana Institute of Engineers

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

- Khuthaza ( Women for Housing)

- Architects Registration Council

- Concrete Manufacturers Association

- Ghana Institute of Surveyors

- Green Building council of SA

- Ghana Green Builders Association

- South African Property Owners Association

- Ghana Institute of Planners

- Master Builders South Africa

- Association of Building and Civil Engineering

- Building and Construction Skilled Artisans

Contractors of Ghana

Association of Nigeria (BACSAAN)

Uganda

- Nigeria Society of Engineers - Nigeria Institute of Architects

Institute of Surveyors of Uganda

Namibia

Uganda Institute of Professional Engineers (UIPE) &

Institute of Namibian Quantity Surveyors

Zambia

Uganda society of Architects

Association of Consulting Engineers of Namibia

- Zambia Institute of Architects (ZIA)

Botswana

- Tanzania Institute of Quantity Surveyors

- Institute of Botswana Quantity Surveyors

Tanzania

- Construction Regulation Board (CRB)

www.constructionreviewonline.com

- Association of Building and Civil Engineering Contractors (ABCEC). May-June 2020 | CR

Construction site maintenance strategies

maintenance intervals; Increases the lifespan of an asset; Better time management due to predefined scheduled intervals and; Longer useful life for parts

The importance of construction site maintenance strategies cannot be overemphasized. Imagine a project for a noncommercial building just months away from crossing the finish line when a tower crane topples and causes four floors to collapse into rubble. Luckily no one is hurt, but the penalty clause from the contract is activated, and the construction site must remain closed while the authorities investigate the cause of the disaster. After two months of uncertainty and frayed nerves, the result from the investigation finally reveals mechanical failure as the cause: no maintenance recorded on the crane for the last five months.

Advantages of Preventative Maintenance Fewer expensive repairs; Reduces downtime due to unplanned maintenance; Longer lifespan of asset; Improved reliability and availability of asset; Cheaper than CMB, PdM, and RCM to implement and; Does not require a large amount of data to implement Disadvantages of Preventative Maintenance Does not consider the critical function of an asset; Is not necessarily an optimized maintenance strategy; Requires in-depth planning and a critical analysis of an asset; Routine maintenance may be unnecessary leading to inefficient use of time and higher spending and; Does not consider the optimum lifespan of a component

Condition-based Maintenance (CBM) Condition-based monitoring uses tests, visual inspections, operational performance, and other equipment information as a “listening ear” to determine the real-time condition of an asset. Different algorithms Preventative Maintenance (PM) later use the data acquired to detect, Preventative maintenance (PM) is a diagnose, and perform a prognosis for an systematic approach that involves regularly asset’s failure modes. scheduled inspection, repairs, replacements, or any other task that minimizes wear and Advantages of CBM tear of an asset. On a construction site, Maintenance performed on an as-needed preventative maintenance can be time-based, basis; Lowers expenses on maintenance usage-based, or predictive. A cut-off-saw by minimizing time spent to maintain is an example where both time-based and an asset; Lowers the risks associated usage-based maintenance are appropriate. with unscheduled downtime; Optimizes Below are some construction site maintenance strategies to guide the decisionmaking process: preventative, conditionbased, predictive, and reliability-centered maintenance.

CR | May-June 2020

Disadvantages of CBM Relies on specific indicators that may lead to asset modification; requires specific knowledge to choose the type of measurement equipment; Expensive to install and time-consuming to perform database analysis; CBM does not detect all types of failures and; Resistance to change is an obstacle Predictive Maintenance (PdM) Predictive maintenance uses conditionmonitoring strategies to identify and asset’s performance and establish a future date for maintenance. This approach closely intertwines data collected from sensors, environmental measurements, maintenance history, machine operations, and other suitable parameters with algorithms. These algorithms then use the collected data with other variables to predict when failure occurs according to the criteria established in a predictive maintenance model. The answers to two crucial questions below provide essential information about the applicability of predictive maintenance for an asset: Does the asset perform a critical function that can negatively impact the project if it fails unexpectedly? Is it possible to cost-effectively monitor the failure modes of the asset? If the answer is “YES” to both questions, then the next step is selecting the components/ systems on a construction site to monitor. Vibration of bearings, overloads in electrical panels, temperature differences

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MANAGEMENT

of electrical components, spikes in motor amperages, motor oil insulation resistance, and overloads are just some examples to monitor on a construction site. Advantages of PdM Increases asset availability due to less downtime; Reduces maintenance costs by making it possible to acquire spare parts promptly and possibly for a lower cost; Better customer satisfaction and employee productivity which are direct results of better maintenance planning and reduced downtime Disadvantages of PdM Misinterpretation of data from sensors and other measuring devices can lead to prediction error; High setup costs and careful analysis to determine which assets perform a critical function can be timeconsuming and; requires more time to develop compared to other methods Reliability-centered Maintenance (RCM) Reliability-centered maintenance (RCM) is an empirical approach that focuses on the reliability and availability of an asset

as opposed to its optimized functionality. The failure mode, effect, and criticality analysis (FMECA) concept is an important tool that elaborates on the goals, principles, and approach in RCM with the final aim of identifying an optimal maintenance program anchored on various maintenance strategies. RCM considers an acceptable level of risk, and consequently, not all failure modes are immediately maintained; only those deemed critical. Advantages of RCM Increases equipment availability as a result of reduced downtime; Reduces maintenance costs by lowering corrective and preventative maintenance costs; Better planning for spare parts availability and consequently lower costs; Better risk awareness and maintenance optimization strategies; Reduces the likelihood of sudden equipment failure and associated probability and; Involves root cause analysis in methodology approach Disadvantages of RCM Cost reduction is only evident over the long term; Management interested in shortterm saving results may, therefore, resist

the change; High start-up costs to buy equipment, allocate resources, implement strategies and train personnel; does not consider ownership costs and; requires good understanding of failure modes at the system level The construction industry relies heavily on building and industrial maintenance strategies to ensure optimal functionality of assets and reduced downtime. A single maintenance strategy cannot achieve this due to the wide range of components/ systems, the numerous failure modes, and the differing degrees of criticality assigned to each. Construction projects are also case-specific with unique design and legal requirements that play an essential role in defining equipment usage, building specifications, and work practices. Cost-effectiveness, available resources, manufacturerâ&#x20AC;&#x2122;s product guidelines, the criticality of a particular component/system, and long-term maintenance plans are essential deciding factors for choosing a combination of different optimal maintenance strategies.

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ADVERTORIAL

HANSGROHE AND YOU Your preferred partner on projects! Whether you’re working on your home, or are in the commercial, residential, or hospitality sector, hansgrohe is the partner you need to integrate planning, supply and quality design, every time. Why Hansgrohe? hansgrohe is the ultimate partner to retail and trade, consistently delivering the highest quality, tailored goods and services is what makes them an industry leader in luxurious taps and showers. Quality is the cornerstone of hansgrohe’s corporate philosophy and long-standing commitment to be right by your side. “We assure you, that you can always put your trust in our quality promise, made by hansgrohe, before, during, and after installation,” says the official hansgrohe spokesperson. Ensuring precision hansgrohe has, over its illustrious history, developed a tried and tested method for delivering projects with perfection. The process has been honed, cultivated and shaped into a model of flawless collaboration, so that you get the most out of your project, every time, hand-in-hand with hansgrohe. Whether you have questions, problem queries, recommendations or specific wishes, hansgrohe is at your service, conducting regular site visits for ultimate peace of mind. All work comes with a 5-year guarantee, unique, cutting-edge innovation and more than 600 design awards in tow. From consulting on the technical specifications and ensuring there is adequate supply during planning, to delivering on time, every time, plus holding plumbers accountable through the highest level of training, you can rest assured that your project will embody the same values and ethos that has tipped the spear for more than a hundred years. Commercial From imposing, environmentally-conscious corporate giants on the Johannesburg skyline to companies whose reach transcends national borders, hansgrohe’s commercial footprint extends the world over; in shopping centres, business hubs and high-tech skyscrapers that are fitted with trademark German luxury and precision. hansgrohe’s pride lives on in every completed project, in every corner of the globe. Residential hansgrohe’s showers and taps bring elegance and understated beauty to homes and residential developments. An eclectic mix of hansgrohe products adorns many houses, apartment buildings and estates, creating the ideal balance between opulence and modern functionality; with perfectly crafted products to suit the individual requirements of each room. Hospitality It is no surprise that hansgrohe products have been featured in a number of exquisite developments in the hospitality industry, primed as they are for exuding class and luxury. Low-flow fittings on taps and shower heads complement some of the world’s finest hotel rooms – the epitome of Sustainable by Design. Partners at Home hansgrohe products are used in buildings all over the world, as the company supplies products to over 140 countries, and directly into the homes of the people. It goes without saying that Hansgrohe are the preferred partners on projects for everyone. So what’s your next project… and how can hansgrohe help? hansgrohe. Sustainable by Design

COVER STORY

Lideta Mercato: World’s best shopping Centre The Lideta Mercato is a new non-typical shopping mall in the Ethiopian capital, Addis Ababa. It is one of Xavier Vilalta’s major projects, in which he breaks out from the conventional idea of the mall with its big stores, by getting back to the old traditional concept of the market and modifying it to suit his multi-storey project. After analyzing the city’s shopping malls, he figured out three shortcomings that needed to be fixed in his project. First, the big shops in these malls cost too much to operate, and so they end up being empty. Secondly, the typical all-glass façades are not suitable for the hot climate in Ethiopia since they let in excessive heat and light, making the inside of the building uncomfortable. Lastly, these malls do not reflect the image of Africa and its culture. The Design Vilalta resolved the first issue by replacing the large shops with smaller ones, inspired by the concept of the city’s Old Mercato which is a public space full of people and activities. Then, he makes the interior thermally comfortable, by using pre-fabricated lightweight concrete system for the façade. The concrete is perforated in a fractal pattern that resembles the ones found on Ethiopian women’s traditional dresses. It was, also, inspired by, the ethnomathematician, Ron Eglash’s idea on how fractals are “the heart of African design.” That design of the façade minimizes heat transmission inside the building and controls both lighting and ventilation. The result is a pleasantly illuminated interior with an outdoor feel to it, and a unique exterior that reflects the local culture. However, these were not the only challenges the designer had to face in this project. There was the matter of the site itself. The site for this project has two parallel streets on both sides without any connection between them. It has no public spaces nearby, and it is highly dense with buildings. So, Vilalta decided to make his building into a public space by using it as a connection between the two parallel streets. He introduces a diagonal path inside his building, with all the entrances gathered on it, to act as a shortcut for pedestrians. The path extends to an inclined atrium that connects the building on the vertical scale, giving a sense of continuity. Finally, Vilalta introduces to his design a number of systems that save energy and reduce the cost of the building operation. These systems include photovoltaic umbrellas on the rooftop, which provide for a well-shaded entertainment zone besides their original use as energy sources. There is, also, a rainwater collection system on the roof which drains the water to tanks in the basement, so that it can be treated and reused for the toilets. World’s best shopping centre The project was named the world’s best shopping centre according to the Prix Versailles, which presented Xavier Vilalta’s studio with the UNESCO special prize in 2017. The project is built on a considerable scale: more than 14000 sqm on nine levels, the last of which is a public terrace, as well as two levels of underground parking. The design process was all-inclusive and multi-faceted, drawing inspiration from the local community and rural Ethiopian art while focusing on the building’s contemporary style and ecological sustainability.

CR | May-June 2020

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COVER STORY

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May-June 2020 | CR

ADVERTORIAL

How COVID-19 has affected the steel market An Accurate Steel Mills Perspective It seems like not so long ago that we had looked forward in optimism to the year 2020. We talked of major investments, new product offerings and huge eagerness of the year ahead. Now, all of that seems a long way away as we stare into our new reality which has been greatly affected by the Novel Coronavirus (Covid-19). In these uncertain times, we are sure that you will see plenty of hardships faced by the global economy, and you may have been wondering what that means for the steel industry and its dependent industries, such as real estate, fabrication etc. We look to providing a basic understanding of the market at this point. As a slight side note, it is our responsibility to ensure that we play our part in guiding the country through this difficult time. That is why we are proud to announce that Accurate Steel Mills is availing its manufactured oxygen (medical grade) to hospitals at no cost! We remain committed to doing our part to help Kenyans fight this as it starts to become worse. With relation to the steel industry, we expect to see a period of steel shortages in the coming months, caused primarily by the fact that most manufacturers will suffer from: Lack of Raw Materials: most of our trading and export partner countries in Asia and Europe are either in the epicenter of the crisis or facing their second or third wave of Covid-19 related cases. At the time of this writing, most countries remain operationally grounded as lockdowns are expected to extend well into May 2020. This means that most capital expenditures, such as machine investments as well as operating expenditures, such as raw materials, consumable items and other components will be delayed. As most businesses in the sector do not hold large quantities of stock, the pressure will start to

CR | May-June 2020

come harder on manufacturing companies. Manufacturing shortages: given the current curfew as well as containment of counties within the country, there are a number of manufacturers who have temporarily shut their doors in order to preserve what little cash flow they have built up to stem their business through this period. We expect this shortage to continue given that the cases domestically in Kenya are still on the rise and we do not see the lockdown being lifted in the immediate future. As the situation stands as one of the leading manufacturers in the country, our doors remain open. The government ordained curfew has reduced our operational production by 30%, but we continue to serve all customers in the market and remain proud to stand by you. We have noticed through our operations within the last few weeks that although there was a slight decline in market demand for steel, this will not continue to be the case. Steel demand is rising as projects fall further behind and there is pressure (especially from international backers) to continue this progress. We, therefore, look to encourage all the market that there will be no collapse. At present, in the darkest of times, it seems possible to look at their being no way that life will resume or return to normality. And perhaps it won’t. But what you can be absolutely sure of is that, as Kenyans, we will persevere and stand by our brothers and sisters and emerge through this a stronger nation. All of our investments have seen a slight Covid-19 impacted delay, but we are confident that we will finish and reveal them to you as soon as possible. We thank you for all your support and most importantly, stay safe during this time! For more information, please visit http:// www.accurate.co.ke/

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May-June 2020 | CR

GEOCELLS

Geosynthetic technology uniquely suited to the African environment

Geocells are an example of geosynthetic technology uniquely suited to the African environment. Geocells are a 3D mechanical soil stabilization and road reinforcement method. The honeycombed cells create a new composite entity when filled with soil materials due to the unique interaction of geometry, soil and the cell-wall material. The stiff 3D mattress restrains the lateral movement of soil particles and maximizes the distribution of lateral and vertical stresses. The main advantage of geocells is the creation of a layer with significantly increased compressive, shear and bending stiffness (slab effect). This results in higher bearing capacity, lower stress/strain fields, resulting in lower deformations and extended service life. However, as Zeev Strahl of PRS – the veteran Israeli manufacturer of geocells – states, this is where Neoloy, a nano-polymeric alloy comes into play. “In the end, it is the stiffness and durability properties of material (beside the cell geometry) that the geocell is manufactured from that determines the

CR | May-June 2020

level of engineering performance. Neoloy is an innovative alloy developed by PRS specifically for geocells. Studies and field trials by leading civil engineering faculties and engineering companies around the world have validated that geocells made from Neoloy show significantly better ultimate bearing capacity, stiffness, and reinforcement relative to geocells made from conventional HDPE geocells, particularly for the entire life span of the roads pavements,” he adds. The Neoloy Geocells’ stiffness, resistance to deformation (creep)and long-term design strength make geocells more suitable for the demanding requirements of infrastructure projects. Projects undertaken in Africa for the Neoloy Geocell include: weak subgrade stabilization and reinforcement for paved and gravel roads, railroad embankments, terminal storage, container yards, airfields and landfills from Northern to Southern Africa and from the Gold Coast to the Horn of Africa. Clients include UNOPS, mine owners , energy companies, railway authorities , port authorities, and government agencies and municipalities.

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Dimiter Alexiew an international Geosynthetic Consultant from Germany, explains that in the African context, it is important to note that the 3D Neoloy Geocell confinement enables the use of sands or other locally available inferior fills, in place of gravel aggregate. And as it works for sands, finer-grained, partially cohesive soils, such as Laterite, can also be used for structural infill. This is of great benefit in many regions in Africa, where even sand is rare. Besides the lack of gravel and sand, expansive soils are a common geotechnical problem in Africa that can be resolved economically by Neoloy Geocells, as a proven solution to equalize heave deformations. In addition, cement stabilization can be replaced in many projects with geocell mechanical reinforcement, as it is more cost-effective, does not crack over time and does not have negative environmental impacts. â&#x20AC;&#x153;The high improved modulus factor from Neoloy Geocell reinforcement typically reduces pavement thickness by 50%, even with marginal infill, with no decrease in performance or service life. Neoloy optimized pavements do not crack, thereby significantly decreasing repairs and maintenance, even under heavy loading/trafficking and harsh environmental conditions. So, both construction and maintenance costs can be lowered at the same time. The end result is a sustainable construction solution with significant economic advantages, enabling countries to maximize their infrastructure investments in the most costeffective and environmentally-friendly manner,â&#x20AC;? says Zeev Strahl of PRS.

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May-June 2020 | CR

ADVERTORIAL

Space step delivers multiple benefits to cabinet plinths Blum’s plinth solution creates storage below and provides easy access up high Cabinet plinths offer undreamt-of possibilities. Space Step by Blum brings multi-functionality to areas that are frequently left unused. The plinth solution consists of a step which extends with a single touch and a pull-out underneath for seldom used items. Space Step delivers multiple benefits to an area that is frequently left unused: the cabinet plinth. The plinth solution by Blum extends with a single touch and can be used as a step. Good for everyone. Children, for example, can reach kitchen worktops more easily and lend a helping hand with cooking and baking. Space Step also makes little ones more independent in bathrooms: they can reach the washbasin and wash their hands and brush their teeth by themselves. As for “big” users, the step gives them easy access to higher levels, be it wall cabinets in kitchens or hat racks in hallways. But that’s not all. The clever plinth solution by Austrian manufacturer of fittings, Blum fulfils another function: the top of the step can be simply pushed back into the cabinet to reveal a pull-out underneath. This is where Space Step creates extra storage space for seldom used storage items. Broad field of application The plinth solution lowers when a weight of 8 kg or more is applied, thus securely locking the step in position, making it safe even for the smallest of users. It can withstand loads of up to 150 kg, provided the recommended construction is used. Space Step can be used for step heights of 150 to 250 mm and is suitable for cabinet widths of 400 to 1200 mm. Be it recessed plinths, recessed low plinths or flush plinths, the plinth solution by Blum can be implemented for all standard plinth types. For supreme user convenience, combine the solution with the Servo-Drive electrical opening support system by Blum. But it can also be easily implemented with mechanical motion technologies such as Tip-On Blumotion and Tip-On. Space Step closes softly and effortlessly with Blumotion.

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PRECAST CONCRETE

Co-operation with the Technical University of Kenya African students learn about modern building systems with precast concrete elements

Modern architecture and new building systems create affordable housing for many people in Africa. At the same time, it will become an important job machine for many countries. To this end, the German concrete plant specialist Vollert is now starting a cooperation with the Technical University of Kenya in Nairobi.

being met. Meanwhile, about 75% of the population continues to live in simple huts and the disproportionately fast growing urban slums. "Affordable living space - high quality, sustainable and environmentally friendly construction This is our common goal for Africa", says Christoph Müller-Bernhardt, experienced Africa expert and Executive Sales Director Africa at the German plant manufacturer Vollert.

Africa's construction industry is booming. The driving force on the demand side is the rapidly growing population with its even faster growing middle class, whose demand for housing is still far from

Solution for housing shortage and quality problems in construction New building systems are needed to close the large gap between supply and demand. "Today, precast concrete elements are used to build attractive single-family homes, modern residential and office complexes, shopping malls, hospitals and schools all over the world", Müller-Bernhardt reports. Thanks to industrialized prefabrication processes, this construction method makes it possible to minimize frequent construction defects and to work with significantly lower investments. But more importantly, it shortens construction times considerably. "In addition, the CO2 footprint will be reduced by 25% and raw materials, water consumption and concrete use will be cut by up to 50%. The new residential buildings have excellent thermal performance, are weather and fire resistant and even earthquake-proof," says Malei Nthiwa of Bola Associates, one of Kenya's leading building developers. Africa is currently taking major steps to introduce this global standard in construction technology. Housing for all': Kenya, for example, wants to build 500,000 residential buildings by 2022.

Björn Brandt (4th from left) with representatives of the Technical University of Kenya in November

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PRECAST CONCRETE

New start-up solutions today make it possible to produce precast concrete elements with low investment budgets. Even technology 'made in Germany' is no longer a vision of the future for Africa. "Awareness of all these points and facts has grown," MüllerBernhardt describes. "However, there is still a lack of know-how about the construction system and of construction companies that are willing to invest in modern plant technology for precast concrete element production". Start-up solutions today make it possible to produce prefabricated walls and ceilings even with low investment budgets. Even technology 'made in Germany' is no longer a vision of the future. 'Proudly made in Africa for Africa': Training and know-how transfer are crucial "First of all, we would like to pass on our competence and experience to the construction industry in as many parts of Africa as possible," reports Müller-Bernhardt. Well-trained civil engineers and special training programmes are crucial. "Together with the Technical University of Kenya in Nairobi, we are currently working on a concept to introduce students and future young civil engineers to the new construction method at an early stage," says Björn Brandt, member of the management board at Vollert. At the beginning of November there was a first exchange with representatives of the individual faculties. In this context, the university was not only provided with extensive book material and information about the construction method, but also with a first round of questions and direct discussions with the students. "It is really impressive how eagerly young people approach the subject. Within the first few minutes, the students were able to see the many advantages of the new construction method with practical examples", describes Prof. Francis O. Aduol, Rector of the Technical University of Kenya. "We are very much looking forward to further cooperation with Vollert. I am convinced that this new generation of graduates from our university will change the construction industry in Kenya". www.constructionreviewonline.com

May-June 2020 | CR

MONOPOLE MASTS

Power transmission and distribution project in Ethiopia A case study for self-supported monopole masts

The ongoing project forms part of a large-scale electricity infrastructure upgrade for Ethiopia and focuses on the transmission and distribution of electricity from various substations to surrounding areas of Addis Ababa. These distribution networks convey electricity with high voltages from 132 kV up to 230 kV and span through tough terrains, city centres and densely populated informal settlements. Structa Group, through its subsidiary, Structa Konsult, was contracted to carry outdata collection, survey, design conceptualisation, detail designs, complete and sign manufacturing drawings, manufacture, and deliver of the masts. The project was a milestone as it was the first time the client considered using these sizable self-supported monopole masts in a high voltage transmission application. According to Erasmus Cilliers, a senior mechanical engineer of Structa Group, initially, the client thought that it would be a big gamble to switch from the ‘tried and tested’ lattice-type pylon structures to large monopoles. However, the client thrust a spot of bother of sorts – with the lattice-type pylon structures, The masts manufactured for these lines were some of the biggest masts ever manufactured by Structa.

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MONOPOLE MASTS

there was concern about the high risk of incidences of vandalism in areas where the poles were to be located to consider. After conveying the experience with these masts in the field, and the rigorous tests that were conducted on the monopoles,

administered by Eskom in South Africa, the final decision to settle for the selfsupported monopole mast was a no-brainer. “The masts manufactured for these lines were some of the biggest masts ever manufactured by Structa. They were

The inherent reliability of these masts ensures that little to no maintenance is required.

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required to be freestanding and supported two power line circuits with their respective optical ground wires simultaneously by means of eight cross arms,” said Cilliers. What gives tubular monopoles the edge? The following are typical advantages of tubular monopoles: low maintenance costs and modifiable, good protection against vandalism and theft, smaller footprints, lower probability of catastrophic failures, and excellent life expectancy. Low maintenance costs and modifiable The inherent reliability of these masts ensures that little to no maintenance is required. “The predominant maintenance is when structures of an existing line are analysed to determine if the same structures can support new conductors with improved electricity characteristics,” said Cilliers. “Additionally, the capabilities of the structure can be increased by adding noninvasive clamp-on modifications. These modifications are designed, manufactured and supplied on a problem-specific basis. Furthermore, we are in the business of design, manufacture and supply of the

May-June 2020 | CR

MONOPOLE MASTS

masts, if our clients require more of the masts or new designs we will deliver,” he added. Vandalism and theft-proof Self-supported masts are becoming prevalent in structure designs of transmission and communication projects, and this is mainly to counteract high vandalism or theft in areas with the identified risks. “Theft of steel is one of the leading problems in many countries. That is why towers are being stripped of their steel members and are sold as scrap. Some members of welded towers are also being removed using portable power tools,” noted Cilliers. However, vandalism does not affect steel masts, as a steel mast cannot be disassembled using regular tools or transported with domestic vehicles. This is because when a mast is surface-mounted in an area identified as high theft or vandalism risk, the foundation gets an additional concrete cap that conceals the bolts. Smaller footprint Self-supported masts are designed to support conductors without any external support such as a strut or stay wires. Compared with towers, they have a smaller footprint and only requires a little land space. A piled foundation for specific structures can be used to create a smaller foundation footprint. High durability and longer life expectancy The galvanisation of the masts, paired with the low number of holes and surfaces provides exceptional corrosion protection and Self-supported masts are designed to support conductors without any significantly extends the life of the structure. external support such as a strut or stay wires

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Less installation time The skills required for the construction process and installation of lattice-type towers and monopole masts are a bit different. Moreover, masts usually require less installation time compared to the assembly procedures of towers. “The installation of towers versus masts is entirely different. A tower is installed by bolting together parts or complete sections on the ground before lifting to the correct heights using cranes and are then bolted together,” Cilliers illuminates. The ‘gamble’ pays off Structa manufactures standard masts and towers for voltages of 11kV up to 220kV. The structures designed and manufactured for this project was for voltages between 132kV and 230kV. With the project being in Ethiopia, the design codes selected were international standards and incorporated the strict requirements of the client. Typically, the sections of these type of masts are manufactured from S355JR material being 3mm to 10mm in thickness, with base plates rarely thicker than 60mm. This project required wall thicknesses of the masts to be between 8mm up to 20mm and base plates from 35mm up to 70mm in thickness. The height of the structures varied between 15.34m to a maximum of 33.5m, and coupled with the large spans, these heights generates heavy moments that the foundations must support effortlessly. The supported tip load of the suspension structures varied between 50kN and 80kN, while the strain monopoles were designed to accommodate tip loads between 170kN to 270kN. That said,Mr. Cilliers is content that the project was delivered to client’s expectations,on time, and to the exact specifications in terms of size and quality.

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DRILLING

Water Well Drilling

Since its establishment in 1999, BAUER Technologies South Africa (BTSA) has executed several deep, large diameter drilling for well, mineral exploration, hydrogeological exploration and dewatering borehole projects in over 20 countries in Africa. With a dedicated team of well-trained experts and state-

of-the-art equipment, the company has achieved noticeable successes In challenging ground conditions.

In 2019, BTSA was contracted by a a large-scale copper and cobalt mine in Kolwezi, Democratic Republic of Congo, to drill and construct large diameter

The well design included installing 28-inch and 24-inch steel casings at appropriate sections of the borehole, a 16-inch steel pump chamber, and 10-inch liner section with wire wrapped stainless casings and screens. Drilling started with a 30-inch Tricone bit from 0 to 15m using the direct (flush) mud circulation drilling method. With this method, the drilling mud is pumped by a mud pump into the drill string. It passes through the drilling bit nozzles and rises, together with the cuttings, within the annular space between drill string and borehole wall to the surface. On the surface, the cuttings are separated from the drilling mud by deposition in a settling pit. The settling tanks are often divided into two parts, the first and largest serving as the deposition of the cuttings, the second acts as a sump for the mud pump. The drilling mud is pumped back into the drilling string for another circulation. It continued with the 27-inch Tricone bit from 15 to 150m, 20inch Tricon bit from 150 to 250m and finally with the 14-3/4-inch

water wells with the aim of dewatering the pit floor and also contributing to the water management plan of the mine. These boreholes were located inside the producing open pit â&#x20AC;&#x201C; noted for its exceptionally challenging ground conditions for water well drilling.

Fig:1 Core samples from an exploratory hole (157 to 162m)

Tricon bit from 250 to 350m using the air-lift drilling method. This method uses compressed air as the transport medium. The compressed air is injected in a small sized pipe that is fixed at the outer side of the drill string. The air is released directly above the drilling bit into the drill string. The injection of air reduces the weight of the mud column relative to the weight of the mud column in the annular space and carries the mud with the cuttings upwards within the drill string with a velocity of more than 2 m/s. The drilling mud is fed by gravity from a settling tank.

Schematics for Airlift Drilling The dewatering boreholes were drilled using the PRAKLA RB 40 universal drilling rig (Fig.2). This rig is highly suited for several drilling methods including rotary-drilling with reverse/direct circulation, auger drilling, percussion core drilling, wire-line core drilling, down the hole hammer drilling and RC-drilling.

Drilling through a highly fractured-massive to weathered complex alternating layers of the Roan Series consisting of Dolomite, Shale, Schist, and Sandstone required a strong mud management system. The mud parameters were regularly monitored to ensure the subsurface pressure was controlled, the borehole wall was stabilized, cuttings were removed, water losses were minimized and the aquifer protected by forming a seal. Various mud recipes were prepared to take care of varying situations such as unconfined aquifers, confined aquifers, mud losses and drilling through cement plugs.

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May-June 2020 | CR

Bauer is a leading provider of equipment and turnkey services for exploration and mining. BAUER Mining Solutions are deployed for bulk sampling, dewatering, remediation of tailings dams and mine infrastructure projects around the world. BAUER Technologies South Africa (PTY) Ltd • Unit 215 • Palms Office Park www.bauersa.co.za 519 • Midrand 1695 • South Africa • info@bauersa.co.za 26 Nupen CR | Crescent May-June 2020 www.constructionreviewonline.com www.constructionreviewonline.com Jan - Feb 2019 | CR 26

All the installed steel casings including the 16” pump chamber were fully grouted in the annular space to secure the well properly and seal against water seepage and washouts in case the casing thread is not watertight. Cementation was done through the cementation string fitted into the check valve of the casing shoe. The float shoe reduced hook weight and ensured that the casing is well centered while the check valve in the float shoe prevented reverse flow of cement grout or mud from annulus into the casing.

Fig 3: RB 40 casing installation at night shift

Spherical silica gravels (1mm diameter) were installed to cover the whole length of the wire-wrapped slotted pipes. To enhance the removal of filter cake formed by the deposition of Bentonite at the screen sections of the well, Tetrasodiumdiphosphate with water was injected at the appropriate sections of the well before swabbing. The borehole was left undisturbed for 12 hours to ensure adequate reaction time before borehole development began. The boreholes were developed to remove the finest particles from the surrounding filter gravel pack, ensure the gravel pack is well stabilized, remove clogging and ultimately improve upon the porosity and hydraulic conductivity of the aquifer. All the boreholes met the minimum residual sand content requirement of < 0.1 g/m3 and yielded over 250cbm/ hr. Prior to hand over, permanent locking borehole protectors were installed on each well. “These large diameter dewatering wells drilled to a maximum depth of 350 m in the exceptionally challenging ground conditions at the pit by BTSA are the deepest successful well installations in the history of the mine operations,” Nana Anderson of BAUER Technologies South Africa, said. “Our team achieved such feat while maintaining very high HSE standards and performance, with no LTI’s or environmental incidents.”

SYSTEMS AND MATERIALS FOR REPAIRING, SKIMMING & PROTECTING CONCRETE.

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PAINT

Choosing the right colour for a commercial building

The choice of colours, once a commercial building is complete, has always presented a challenge to many developers. Understandably, paint work is not one of the key considerations that developers grapple with at the conception of a project. Most would rather worry over completion of the physical structure, which is often the phase that takes up most of the financial resources. But what happens when the project has finally taken shape and all that is left is â&#x20AC;&#x153;finishingâ&#x20AC;?? Many project owners will concede that this too poses a major challenge. The physical appeal of the building and subsequent uptake of rental or purchased space is quite often influenced by the colours that have been employed in the finish. This is why it is critical that even as the development is under way, the developer must constantly put his mind around what colour scheme to use once the 28

project is complete. There are thousands of possible colours to choose from (up to 5,000 offered by some paint manufacturers) and herein lies the question: how then does one settle on the right colour? It is a question to consider both for ew buildings and renovation works. According to Higgins Coatings, there are some standard guidelines that should help the developer come up with colours suitable for the particular development. Architectural style of the building For instance, a building could be a historical or a futuristic structure. A modern palette will look very out of place on a historical building, and vice versa. Older buildings favour neutrals and rich browns, while modern buildings experiment more with bolder colours, including orange, yellow and red.

CR | May-June 2020

Impression intended and who is to use the building Depending on the type of clientele one wishes to attract, choice of colour scheme may vary. A building that hosts advertising firms or interior design businesses may opt for bold colours while law firms may inspire more subdued colours. A hospital normally goes for white or mild blue. A kindergarten will call for several different bright colours. Colour combination that works best As a general rule, no more than three colours should be used on the exterior of a building: one for the walls, one for the trimmings and one for accents. It is a choice between complementary and analogous colours. Complementary colours are colours that are directly opposite each other on the colour wheel, such as red and green, blue and orange or purple and yellow. These

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PAINT

create a visually striking effect, making a space more impactful. Analogous colours, on the other hand, are colours that sit side by side on the colour wheel, such as orange and yellow, or green and blue. These create a subtler, more harmonious effect, making a space feel more casual. Other factors that may influence choice of colour are brand identity and surroundings. If the building belongs to and houses an organization with already distinct brand colours, naturally it is these colours that will guide the paintwork. For instance, it is unlikely for a building housing Coca Cola to use blue, yellow or other such colours that do not identify with the company.

rhyme with these existing structures. Local regulations may also dictate the colour to use. For instance, Mombasa County Government in Kenya decided that all commercial premises should adopt white and blue as their colour scheme. Before commencing paintwork, it is advisable to try out the selected colours on a smaller area. This will give the developer an idea of how the entire building will look like and provide a path to change before painting the entire structure and regretting later.

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Issues in Construction Health and Safety Safety of construction workers has been a constant challenge everywhere. According to the Occupational Health and Safety Authority of Malta, it is estimated that construction workers are three times more likely to be killed and twice as likely to be injured as workers in other occupations. Besides injuries from falls, cuts, fire outbreaks and other hazards, the health of these workers is also an issue of major concern. Such conditions as noise-induced hearing loss, respiratory infections and skin diseases arising from exposure to chemicals as well as musculoskeletal disorders are not uncommon in the industry. To mitigate this situation, it is important that health and safety issues are incorporated at the design stage of a project. In most construction projects, tight budgets and deadlines often relegate health and safety considerations to the background. In a bit to cut costs and deliver a project on time, many contractors have little regard to safety measures beyond the very basic. Therefore, the choice of a contractor based solely on the lowest bid and fastest undertaking of delivery should not always be criteria to award. Instead, conscientious and responsible clients should insist on a discernible plan to keep the site safe during the entire construction period.

creates health and safety management systems for players in the construction industry and supervises their implementation. Booth is renowned for its broad range of firefighting and detection products including fire extinguishers, hose reels, landing valves, breeching inlets, fire alarms systems, fire hydrants and fire suppression systems.

Companies that have recognized the importance of health and safety have invested in training for their workers and observe all OHS practices as required by local regulatory authorities. And with the emergence of the new challenge of COVID-19, it is increasingly important that workers’ health be safeguarded through clear communication of safety procedures as construction work continues. Workers must also be made to fully understand the ramifications of inadequate safety measures and supervisors must be there to ensure that all guidelines are fully complied with.

BOOTH FIRE PROTECTION LTD

Availability of proper protective equipment recommended for particular tasks is also a key safety enabler. Different tasks call for specific protective gear. It is incumbent on the organization to properly train, equip and supervise workers to ensure such gear is not only used but also used in the right way. In Kenya, OHS compliance in Kenya is a challenge that cuts across both private and public sectors according to Morisson Engineering Limited, a leading supplier of Fire Engineering, Power Engineering and Air Conditioning products in this region. “There is low awareness on OHS and fire safety among workers in the country.” Quoting a study conducted by ICOH 2013, Kenya had about 4% of the working population accessing OHS services compared to developed countries which had over 90%. “The implementation of fire safety and OHS guidelines largely depend on improvement of work, environment, training and creating awareness in different forums.” There is however no shortage of organizations dealing with OHS products and services in the country. Besides Morison, whose division Atlas Fire Security provides fire safety products, other companies providing high quality products or services include Safepro Limited and Booth Fire Protection Limited. Safepro

Automatic Powder Fire Extinguisher Fire Extinguishers

Fire Hydrant Valve

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• Hose Reel & Accessories • All types of Fire Extinguishers (EN3 approved) • Fire Safety Signs • Sprinkler/ Sprinkler System Components/ Sprinkler Alarm Valve

Fire Hose Reel

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Trolley Fire Extinguishers

Wet & Dry Riser Equipment Fire Hydrants All type of Valves Extinguisher System Components Flow Control Equipment

TEL: 020 2614848, +254 733706788/ 0788824729

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May-June 2020 | CR

SAFETY

Construction is booming now, but without safety its future is uncertain. The Kenyan construction industry, like in any other part of the world, is growing fast, a steady growth that will continue over the next few years. This growth presents an increased concern on safety because hazardous conditions are part of the everyday working environment in the construction industry. These risks have made companies prioritize health and safety, more than it was back in the 80s and 90s. Despite increased revenue, creation of employment, improved infrastructure, just to mention a few, the construction industry has been on the frontline on injuries and fatalities. These accidents also have other indirect costs like time lost due to stoppages and investigations, training, and additional costs associated with replacing injured workers and loss or damage to material, machinery, and property. Over the years, the number of laborers in

this industry has gone up; most of them have not undergone the necessary training on their safety on site. Think of it in this term; some of the construction workers who went to work do not return home, which should not be the case need not be the case in this. The most common hazards in construction include; falls from height, falling objects, on-site electrocutions, traps in or between, dust inhalation, motor vehicle accidents, among others. We can avoid this by emphasizing health and safety more than ever before. Contractors have the responsibility of the safety of their workers and can achieve this by getting competent advice from health and safety experts. At SAFEPRO Limited, we establish the health and safety management system for them and supervise its implementation at a fraction of the cost of non-compliance.

Our journey begins with setting up the framework that guides all stakeholders from the top management to the least worker on site. This not only reduces losses but also build the profile of the contractor when bidding for future projects. There is not job too urgent or too important that it cannot be done safely! By Safepro Ltd-Environmental & Safety Consultants

Environmental Health & Safety Consultants

Our Services OSHA - 2007 COMPLIANCE SERVICES | NEMA COMPLIANCE SERVICES. FIRST AID TRAINING | HYGIENE SURVEYS | FIRE TRAININGS. FIRE FIGHTING EQUIPMENT | PPE & SAFETY EQUIPMENT.

CR | May-June 2020

Muthaiga Cool Breeze Gardens, Office B | P.O BOX 106121-0 www.safepro.co.ke | info@safepro.co.ke

0725 254 536 | 0720 530 985

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PROJECT

Laser Property Services oversee Nova Pioneer’s expansion into Eldoret

Nova Pioneer is a group of elite schools that seek to produce the next generation of innovators and leaders through provision of a highly conducive learning environment that enables learners to realize their full potential. The group currently operates in South Africa and Kenya. The group is expanding rapidly and has established several institutions in both countries with the latest being Nova Pioneer Boys Secondary School in Eldoret, about 320 kilometres from the Kenyan capital Nairobi.

In 2018, Nova Pioneer Schools were seeking to expand their presence in Kenya and were looking for suitable land to host their next institution. The Local Authorities Pension Trust (LAPTRUST) owned land in Eldoret as part of their vast property investments. Nova Pioneer submitted an Expression of Interest to partner with LAPTRUST in the development of the boys secondary school on a design build model for a long tenancy arrangement on LAPTRUST’s 20-acre piece of land. It was at this juncture that Laser Property Services came on the scene

Ambalian Company Limited Suite 1, Mezzanine Floor, South Gate Centre Mkoma Road, South-B, PO Box 22932 – 00100 Nairobi. Tel +254 - 20 – 266 2166 Cell +254 – 722 – 806 752 Email info@ambalian.co.ke URL: www.ambalian.co.ke

as project managers. Laser Property Services is a Subsidiary of CPF Group which was incorporated as a limited company in 2013. The company had been in operation for over 20 years as a department within the group before then. Its aim is to be the premier provider of comprehensive and innovative real estate solutions by offering professional solutions through partnerships that safeguard the interests and goals of all stakeholders.

OUR AREAS OF BUSINESS Solar Water Heating Solar & Home Power Systems Solar Water Pumping Solar & LED Lighting Applied Solar Power Wind Power Development

00101

We are proud to be associated with NOVA PIONEER ELDORET www.constructionreviewonline.com

May-June 2020 | CR

PROJECT

Nova Pioneer Boys Secondary School

Nova Pioneer Boys Secondary School is Laser’s first educational project to manage. The project is located at a corner bordering the old Nairobi-Nakuru Road and Plateau Road. The development comprises a 16,000 Sq.M campus consisting of classrooms, dormitories, auditoriums, staff residences, operation facilities such as maintenance workshop and kitchen as well as sports facilities for two schools to be constructed over a period of four years. Phase 1 is already complete and handed over to the tenants, Nova Pioneer Schools, and is operational. Phase 2 is ongoing and scheduled to be completed in 2020. Phases 3 and 4 will be done in 2022. The entire project is expected to cost approximately KES 1.66b (approximately US$17m) over the four year period. As project manager, Laser Property Services were also tasked with the provision of the following services: •Architectural Services •Quantity Surveying Services •Civil Engineering Services •Structural Engineering Services •Mechanical Engineering Services •Electrical Engineering Services •Project and Development Management Services Blink Studios, a respected architectural firm based in Nairobi, are both architect and lead partner in the project. 34

CR | May-June 2020

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PROJECT

Project Team

Client/Developer: Local Authority Pension Trust (LAPTRUST) Project Manager: Laser Property Services Architect and lead consultant: Blink Studio Limited Contractors and subcontractors Main Contractor: China Wu Yi Mechanical Services: Trident Plumbers Ltd Standby Generator: Ryce East Africa Ltd Solar Water Heating: Ambalian Company Ltd Borehole Services: Sobon Hydro Solutions

Laser Property Services

broadly offers the following services: •Property and Asset Valuation •Feasibility Study and Investment appraisal •Project Development and Management •Property and Facility Management •Real Estate Agency Services So far, Laser Property Services has amassed an impressive portfolio that includes the following properties: •Pension Towers - Commercial •Freedom Heights Mall and Residence – Mixed Use •CPF House - Commercial •Metro Park - Commercial •Police Sacco Plaza - Commercial •Highlands Mall - Commercial •64 Resort Eldoret – Commercial •Man Apartments - Residential •Lavington Property - Residential •Changamwe Flats – Residential •Nakuru Residential Units

CC Comcap CONSULTANTS

Elgeyo Road, Kim Plaza, Near Hotel Sirikwa P.O. Box 7239-30100 Eldoret, Kenya Tel: +254 700 136405, +254 729 368635 Email: gcheserek@yahoo.com

CORE SERVICES • Environmental Impact Assessment (EIA) • Environmental Audit • Baseline Surveys • Project Evaluation Reports • Promoting Green Technologies in development.

• Strategic Environmental Assessment (SEA) • Occupation Health and Safety (OHS) • Waste Management • Environmental Mapping of Natural Resources using GIS

We are proud to be associated with

NOVA PIONEER ELDORET BRANCH

as their Environmental Impact Assessment Consultants www.constructionreviewonline.com

May-June 2020 | CR

Advertisers Index The Revaro Group of Companies................................... IFC

Ryce East Africa.............................................................. 22

Grundfos......................................................................... 1

Abyssinia Group of Industries........................................ 23

African Supplies Ltd....................................................... 7

Davis and Shirtliff........................................................... 24

Hansgrohe....................................................................... 9

Bauer maschinen............................................................. 26

Accurate Steel Mills........................................................ 13

Mapei.............................................................................. 27

Advent Valuers Ltd......................................................... 32

Basco Paints.................................................................... 29

Blum................................................................................ 16

Solai Paints..................................................................... 30

Jessop and Associates..................................................... 17

Booth Fire Protection Ltd............................................... 31

Kens Metal Industries..................................................... 17

Safepro Ltd...................................................................... 32

Zedex Fabricators Ltd..................................................... 17

Ambalian Company Ltd.................................................. 33

Bosch East Africa............................................................ 17

Ryce East Africa.............................................................. 34

Ryce East Africa.............................................................. 17

Comcap Consultants....................................................... 35

Vollert.............................................................................. 18

Mabati Rolling Mills....................................................... IBC

Structu Technology......................................................... 20

Doshi Hardware.............................................................. OBC

Fit Tight Fasteners Ltd.................................................... 21

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Construction Review Africa

Articles inside

cover story Lideta Mercato; Voted worlds best shopping centre

Health and safety: A look at the construction industry

Water well drilling: Dewatering a mine in Congo

Monopole Masts A case study in Ethiopia

Precast Concrete Working with the Technical University of Kenya

Construction site maintenance strategies

Painting: What to consider for commerical buildings

Geosynthetics: An African perspective