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OCTOBER 2014 ISSUE: 64
SA R36 EACH INCL. / R360 PER ANNUM INCL.
OCTOBER 2014
ISSUE: 64
Trademax Publications
EDITOR’S COMMENTS....................................................................................................... 2 SOLAR PV............................................................................................................................6-9 COVER STORY.............................................................................................................. 10-11 INDUSTRY INSIGHT.................................................................................................... 12-16 PRODUCT PROFILE..................................................................................................... 18-20 NEWS............................................................................................................................... 22-24 BEE.................................................................................................................................... 26-27 ADVERTORIAL.............................................................................................................. 30-34 ADVERTORIAL.............................................................................................................. 36-38 INSULATION....................................................................................................................... 40 ASBESTOS....................................................................................................................... 42-43 TECHNOLOGY.................................................................................................................. 44 INSULATION................................................................................................................. 46-48 WATERPROOFING............................................................................................................ 50 EVENTS............................................................................................................................ 52-55
SA Roofing Tel: 0861 SA ROOF Tel: 0861 727 663 Cell: 082 266 6976 Fax: 0866 991 346 www.trademax.co.za Postnet Suite 241 Private Bag X103 N1 City 7463
PUBLISHER: Billy Perrin billy@trademax.co.za 0861 727 663 EDITOR: Jennifer Rees editor@trademax.co.za 0861 727 663 ADVERTISING: Jacqui Marsh jacqui@trademax.co.za 0861 727 663 LAYOUT & DESIGN: Craig Patterson craig@trademax.co.za SUBSCRIPTIONS: Belinda Thwesha belinda@trademax.co.za 021 595 3422
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DISCLAIMER The views expressed herein are not necessarily those of Trademax Publications. Although we have done our best to ensure the accuracy of our content, neither Trademax Publications nor SA Roofing magazine will be held liable for any views expressed or information disseminated , in editorial content or advertisements, in editorial content or advertisements, in this issue.
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EDITOR’S COMMENTS
SA Roofing has it covered! In this issue of the SA Roofing magazine, we cover a broad spectrum of topics from ever-present insulation to asbestos removal, as well as some great local projects and events taking place in the industry.
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e feature the first green transport facility in South Africa, brought about by the City of Cape Town. This facility generates its own electricity via solar photovoltaics installed on the roof, and operates almost entirely off the grid. In addition to this energy-saving aspect, the roof also plays an instrumental role in rainwater harvesting and recycling, serving the entire facility’s water needs (aside from drinking water). The Wallacedene taxi rank proves that intelligent roofing can go a long way in making a building one that really serves the people who use it. In terms of trusses, we have another great contribution from Lyndsay Cotton, chairman of the ITC-SA on the correct design and construction of truss systems, we put the spotlight on MiTek’s product offering, and report back on the Biligom showcase we attended in mid-September.
We are also very happy and excited to announce our recent certification by the Audit Bureau of Circulations of South Africa (ABC), an achievement which marks our commitment to transparency and quality publishing. We are nothing short of proud to have earned the right to carry the prestigious ABC logo in this title. Six years of quality publishing and a tireless commitment to the roofing market have made SA Roofing the tried and tested goto brand for you, the national roofing trade. With the support of this fundamental segment of the construction industry, the ABC’s stamp of approval and a vision that welcomes the future, we remain steadfast in connecting the local roofing trade to a highly targeted readership that has been painstakingly finetuned over the years. Undoubtedly, SA Roofing has it covered. Enjoy the read! Jen
Contributors LYNDSAY COTTON Lyndsay entered the construction industry in 1989 and has many years’ experience in both the civil and commercial spheres of this industry. He is well versed in residential construction and especially roofing, as he erected many of the roof structures in over 300 luxury houses and upmarket units in residential clusters he constructed. Holding a BSc (QS) degree, and a Diploma in Project Management, Lyndsay is the General Manager of a leading Gauteng-based fabricator, and is the current Chairman on the board of the ITC-SA. Although work always takes priority, his passion is exploring the back roads of Africa on a KTM990 Adventure motorcycle.
ERROL HOBDEN After having worked as an engineer mainly in reinforced concrete systems, Errol started out in the prefabricated roof truss industry with International Truss Systems in 1994, and after a year he was promoted to manager of technical services. In 1996, he was offered a position with a company called TeeLok in the USA, also metal nail plate manufacturers and engineering system software suppliers, after which he worked for a number of truss manufacturers in the USA, and gained a vast amount of operational experience. In 2012 he returned to South Africa and rejoined International Truss Systems.
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ALL THE RIGHT MOVES WHEN CHOOSING INSULATION 21
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24 YOU DID NOT USE LAMBDABOARD
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16 HIGH COMPRESSIVE STRENGTH. ADVANCE TWO BLOCKS
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I N D U S T R I A L
SO L A R P V
First ‘green’ transport facility in South Africa unveiled 6
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SO L A R P V
The City of Cape Town has unveiled the first ‘green’ transport facility in South Africa that generates its own electricity, enabling it to operate off the electricity grid. Furthermore, all the water used at this facility, besides drinking water, is provided for through rooftop rainwater harvesting and recycling. O C TO B E R 2 0 1 4
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he Wallacedene taxi rank is the first public transport facility in the country to be regarded as a ‘green’ building from its very foundation to the rooftop. It is largely selfsufficient in all its energy needs and saves thousands of litres of water through clever design. “The City of Cape Town is extremely proud to be at the forefront of combining intelligent architectural design and technology in our effort to improve service delivery to our residents. The Wallacedene taxi rank sets the benchmark for future public transport facilities in the country, showcasing the City’s commitment to conservation and innovation,” said the City’s Mayoral Committee Member: Transport for Cape Town, Councillor Brett Herron.
In designing this taxi rank, the City’s architects have also taken into consideration the huge demand for water at this site for the washing of taxis. The use of potable water for car washing is regarded as a colossal waste of resources – from the precious source itself, to the infrastructure and electricity required to filter and pump the water. Thus, the taxi rank was designed to be self-sufficient in meeting its basic water needs, firstly through the harvesting of rainwater and secondly by recycling up to 70% of the water used at this facility through an underground filtering and reclamation system.
This taxi rank uses a rooftop solar photovoltaic (PV) panel system, arrayed at optimum orientation to the sun, for its electricity generation. It is equipped with 24 large batteries for the storage of reserve solar electricity to be used at night or on cloudy days. From the LED lights under the roof, to the electronic gates at the entrance and the hydro-boils in the kitchen – everything is powered by this PV system. “In fact, since 1 August 2014, this facility (has) only needed one hour’s worth of electricity from Eskom (this is an Eskom supply area), which we believe was needed only because the contractors used power tools on site during the final construction phase,” said Councillor Herron. It is estimated that the capital cost of this solar installation will be recovered within six to 10 years in monthly energy cost savings.
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“One of the most exciting features of this facility is the manner in which we are using the rank’s considerable roof area for the harvesting of rainwater. The rainwater is stored in an underground tank system with a storage capacity of up to 20 000 litres and is equipped with the necessary infrastructure to pump this water to the washing bays,” said Councillor Herron. This water savings system is to the benefit of the residents, the City and taxi operators alike: potable water will be conserved and there will be a considerable reduction in monthly water bills (which could amount to savings of approximately 40%), thereby ensuring the future sustainability of the taxi rank washing bay. The City anticipates that the Wallacedene public transport facility will achieve a four-star rating from Green Star South Africa, a rating system used by the Green Building Council SA to measure how green buildings are, once the rating process has been concluded. About 5 000 commuters will be arriving at or departing from this taxi rank on a daily basis, with approximately 50 minibus-taxis operating from there. Previously, the passengers and operators had to operate from an open piece of land with no formal infrastructure. However, henceforth they will no longer be standing in the rain or walking through mud. There are full flush toilets at the facility, recycling bins, as well as loading bays for the operators, and benches for commuters who are waiting for the next available taxi. Furthermore, trading opportunities have been created for local entrepreneurs with the provision of six informal trading bays and two kiosks just outside the facility. “We have spent approximately R25 million to build a public transport facility that is safe, secure and decent and the City is certain that the elderly, women, children and people with special needs in particular, will benefit from this new development. This project is a confirmation of our commitment to improving our residents’ access to public transport, especially those who live far away from opportunities and amenities, spending about a third of their income to get to work and back,” said Councillor Herron. The consumption metre at the Wallacedene public transport facility indicates the facility’s electricity usage and source of electricity at any given hour and day. For example, the blue lines indicate the usage of the reserve solar electricity that has been stored in batteries, the yellow lines indicate the direct usage of solar electricity from the PV roof panels, and the red indicates the usage of Eskom power which has been less than 1%, or approximately one hour, since 1 August 2014. Reserve solar electricity is stored in 24 batteries in the battery room and the Wallacedene public transport facility can tap into these reserves at night or on cloudy days.
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COV E R S TO RY
Over-Roofing Asbestos Roofs ASBESTOS IN THE SOUTH AFRICAN ROOFING INDUSTRY Asbestos is a naturally occurring fibrous material that, due to its non-corrosive and thermal properties has been used to manufacture a vast range of asbestos-cement roofing products in South Africa. Asbestos fibres are known to pose lifethreatening health risks when inhaled, such as asbestosis and mesothelioma. Use of asbestoscontaining products is now banned in South Africa; however, the legacy will remain with us for many years to come as asbestos-cement roofing products were the preferred choice of roof covering for many years. Asbestos-cement is primarily a cement-based product where about 10% to 15% asbestos fibres are added to reinforce the cement. Asbestoscement is weatherproof in that although it will absorb moisture, the water does not pass through the product. It was used for corrugated sheets, slates, soffits, rainwater gutters, down pipes and fascias. When cementitious products like asbestos-cement were manufactured, they had a cement-rich surface. The asbestos fibres were encapsulated within. Thus, occupants of buildings with asbestos-cement sheet or slate roofs are unlikely to be at any greater risk than people outside in the fresh air. The small quantities of fibres released during natural weathering are unlikely to be dangerous. However, significant and possibly dangerous amounts of fibre can be released if the products are subject to any abrasive cleaning, damage or removal. Where an asbestos-cement corrugated roof has come to the end of its economic life, it is safer and more cost-effective to leave the sheets in place and over-roof with a non-asbestos roofing sheet, whilst adding insulation if required.
OVER-ROOFING Over-roofing is an environmentally sound way to deal with roof coverings that contain asbestos. The Asbestos Information Centre of the United Kingdom (www.aic.org.uk) states: “Asbestos materials, which are sound, undamaged and not releasing fibres, should not be disturbed. Their condition should be monitored on a regular basis. Removal should only be performed where repair is not possible or the material is likely to be disturbed.” Enclosure of asbestos-cement roofs by means of over-roofing is widely recognised internationally as a safe, cost-effective and non-invasive alternative to removal.
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Existing asbestos-cement roof sheets are left in position, eliminating the labourintensive and dangerous task of removal.
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The innovative Ashgrid system is installed in the troughs of the existing asbestos-cement roof sheets with the brackets fixed through the roof sheets directly into the existing steel or timber purlins. The Ashgrid brackets are available from 60mm to 280mm to create a cavity for the installation of insulation to achieve the required R-value. All drilling is carried out in conjunction with a specialised H-Series vacuum which is designed to capture any dust and asbestos fibres created during the drilling process. This powerful vacuum cleaner is fitted with an Ulpa Filter for 99.999% efficiency at 0.12 micron. It is ESD safe, meets HSG264 standards of surveying and is fully compliant with BS EN 60335-2-69.
WHAT ARE THE BENEFITS OF OVER-ROOFING? • MINIMISES BUILDING OCCUPANTS’ RISK AND DISRUPTION OF TRADE South African legislation stipulates that occupants of a building where asbestos roof sheets are being removed vacate the premises. Leaving the existing roof covering in-situ allows the occupant of the building to continue with their day-to-day business operations without costly disruptions to trade. Consequential damage due to inclement weather and falling debris usually associated with conventional re-roofing is eliminated when over-roofing.
• ELIMINATES RISING COSTS ASSOCIATED WITH REMOVAL & DISPOSAL OF ASBESTOS South African legislation stipulates that the removal and disposal of asbestos may only be carried out by registered asbestos removal contractors. Removal and disposal costs are high due to safety procedures, transportation and disposal costs.
• LABOUR & TIME SAVINGS Leaving the existing roof covering in place eliminates the removal phase. This in turn reduces the duration of the project, which contributes to significant financial savings.
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The new outer roof covering is installed directly to the bars of the Ashgrid system. The Ashgrid system is compatible with all forms of pierced and concealed-fix profiled steel sheets and is engineered to evenly distribute the loads into the existing roof structure.
Insulation is installed to the newly created cavity based on the required thermal, acoustic and fire performance requirements of the specific project. Installation of insulation is not a prerequisite.
• IMPROVED HEALTH & SAFETY
• ENVIRONMENTAL BENEFITS
The existing asbestos-cement roof sheets remain in place, providing the contractor with a platform from which to work. This significantly simplifies the fall protection plan required. The majority of loose asbestos fibres are present between the sidelaps of the existing asbestos-cement roof sheets. These fibres are only at risk of being released when the roof sheets are lifted and removed. Leaving the existing asbestos-cement roof sheets in position eliminates the risk of releasing fibres and exposing the contractor or occupants to contamination.
Our landfill sites are filling up at a rapid rate. Over-roofing asbestos-cement roofs prevents further deterioration of the product, rendering it inert and safe, whereas asbestos-cement products that are disposed of in landfill sites continue to degrade due to exposure to the elements. This continued uncontrolled deterioration has a severe impact on our alreadyfragile environment.
• ENERGY EFFICIENCY
Over-roofing incorporates a second layer of roof covering, which provides additional security. The majority of commercial break-ins occur through the roof. This additional layer of roof covering provides an extra barrier to deter criminals.
Over-roofing with the Ashgrid Spacer System creates an engineered, structurally defined cavity between the old and new roof coverings. When insulated, this cavity dramatically improves the overall energy efficiency of the entire building. With ever-increasing electricity prices in South Africa, energy consumption has become a big concern for most property owners and tenants. Significant financial savings are possible over the life cycle of the new roof covering when insulated appropriately.
• ACOUSTIC PERFORMANCE The creation of an insulated cavity dramatically improves the acoustic performance of a roof. Acoustic performance is imperative when a suitable environment is required in places of learning, libraries, broadcasting facilities, court houses, etc.
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• SECURITY
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All the support you need Knowing that the trusses overhead have been designed and erected according to industry norms and standards is of the utmost importance, as is the implicit trust home owners and developers must have in the professionals they employ to ensure the correct design and erection of this important structural component. By Lyndsay Cotton, General Manager of LCP Roofing and Chairman of the ITC-SA with assistance from professional engineer, Errol Hobden.
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I N D U S TRY I N S I G HT
(to support large corner overhangs)
T
he word ‘truss’ comes from the very old French word ‘trousse,’ which meant ‘an arrangement or group of objects bound together.’ From an engineering perspective, a truss is a rationally designed framework of structural compression and tension members, arranged in a series of triangles in order to span large distances, and to support the dead and live loads to which it will be exposed during its lifetime. The truss rests on a wall plate, which is a horizontal loadbearing member (the support) of an engineer-approved dimension, of a material fit for the design purpose, and which must be able to transmit the design loads to the supporting structure. This wall plate can, for example, be of structural timber or steel. The connection of the truss and wall plate is thus engineered by nature, and it is this connection that is often overlooked by the designer and erector. The roof truss designer is to ensure that all structural loads are catered for in the design of the roof trusses. This will ensure that dimensionally correct members are used to accommodate for all the forces that could be applied to the roof structure of the building, transferring into the supporting structure below. The incorrect design of the roof trusses and their connection to the supporting structure could cause excessive deflections at the heel supports of the trusses, which could result in wall cracks and the potential failure of the structure. Take a masonry wall support in a standard residential application where the wall is designed to support vertical loads imposed on it by the roof structure: The wall is designed as a compression member able to resist vertical loading, but in most cases will not be able to resist excessive horizontal movement or forces. The wall designer needs to ensure that the wall is capable of resisting the horizontal loads imposed on it by the roof structure.
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SUPPORT TYPES AND SUPPORT REACTIONS When considering supports and reactions, the following graphic explains best the three typical constraints and forces experienced in a structure, namely ‘roller’ supports, ‘pinned’ supports and ‘fixed’ supports.
CONSTRAINTS
Roller The connection point on the bar cannot move downward.
Pin The joint cannot move in vertical and horizontal directions.
Fixed Support The support prevents translation in vertical and horizontal directions and also rotation.
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Trusses are mostly designed with one pinned support and at least one roller support. From a design calculation point of view, the roller support will allow the truss to move horizontally; therefore the truss design needs to ensure that the truss is stiff enough so that the horizontal movement is kept to a minimum or within acceptable design standards. When a truss is designed with one support pinned and the other support as a roller support, the design calculations will show that there are no horizontal reactions.
H - Overall height of building Hx - Horizontal displacement for storey height u - Overall horizontal displacement ux - Horizontal displacement over storey height
All structural members deflect under load and the horizontal deflection in a roof structure is an important facet to be considered in the design of the support structure. SANS 10160-1:2010 recommends that the horizontal deflection in a wall or column be no more than storey height of the element divided by 250. For example, a typical residential supporting wall of say 2 800mm high should not deflect horizontally by more than 11mm. When designing roof trusses and especially scissor trusses, quite often the horizontal deflection will exceed 11mm. Should this deflection exceed 11mm and be no more than 25mm, a sliding shoe must be installed on at least one support in order to allow the truss to deflect without imposing excessive horizontal loads onto the supporting structure.
There will be instances where the truss designer will be required to pin the truss at both supports. This should only be allowed with the approval and consent of the design engineer. By pinning both supports, the roof truss is then dependent on the supporting structure, as well as the connection of the truss to the support structure for its strength. The truss is no longer a single structural member that is capable of supporting its load on its own, but is now dependent on the supporting structure to help it carry the load. The supporting structure must thus be able to withstand all the forces, as well as the horizontal forces imposed on it by the roof structure. The structural engineer responsible for the design of the support structure needs to be contacted to find out if he has accommodated for the loads and horizontal loads that the roof will be imposing on the support structure. The truss engineer and the engineer responsible for the support structure need to liaise on the design of the cleat required to anchor the roof trusses to the support structure. In some cases the trusses may be required to resist axial loads. These axial loads could be due to wind or seismic loads and in some cases they could be due to other structural components in the structure needing help from the roof trusses to resist, for example, excessive buckling loads. In these cases it is imperative that the connection of the roof truss to the structure be adequate to transfer the loads from the one structural component to the other. It is important to note that wire ties or strapping cannot be considered to adequately transfer horizontal loads into the support structure. Wire ties or strapping are designed to resist upward forces generally created by wind.
SUPPORT OVER OPENINGS Vertical support is equally critical, and whilst this is not within the ambit of the truss designer’s responsibility, it is the duty of care of the truss designer to notify the engineer of unusually large loads imposed on a supporting structure by the roof trusses. (One of the least understood construction details on a building site is that of the support of roof structures over double garage openings.)
Horizontal Deflection
Pinned Support
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Roller Support
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I N D U S TRY I N S I G HT
Horizontal Deflection
Horizontal Deflection
Pinned Support
Excessive Horizontal forces induced into walls
Pinned Support
WC - Pre Camber WS - Deflection under self weight WL - Long term deflection under permanent or semi-permanent loads – – - Horizontal line
According to SANS 10400-K:2011 the lintel depth over a double garage opening should be no less than 765mm or 9 courses of 85mm deep each, and should be of a grouted cavity construction, the cavity filled with 25MPa concrete.
FOR MORE INFORMATION PLEASE DO NOT HESITATE TO CONTACT THE WRITER FOR CLARIFICATION AND EXPERT ADVICE:
Pre-stressed concrete lintels must comply with SANS 1504 and the bearing width (each side of the opening) must be no less than 350mm. In other words, the pre-stressed lintels over a typical 4 800mm double garage opening are not to be less than 5 500mm long and are to be supported for at least 7 days after completion. Furthermore, it would be wise to introduce a camber of span/500, which, rounded off, equates to 10mm. This is easily accomplished by installing the lintels and building up the ends with brickwork to weigh them down. The lintel is then jacked up centre by 10mm and the brickwork completed.
(c) 082 564 2730 | 0861 LCPROOF (e) lyndsay@lcproofing.co.za (w) www.lcproofing.co.za
There must be a minimum of 2 x Y12 primary reinforcing bars at the base of the lintel and 1 x Y12 secondary reinforcement at the top of the lintel. Brick force centres should not be less than 200mm. The use of 5.6mm hard-drawn wire introduced in lieu of brick force over all openings will be the preferred method employed by all professional builders. The brickwork must also be completed in one shift. A correctly constructed lintel will adequately support the roof structure and be able to resist both vertical and horizontal forces.
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eCo Fasteners® are timber and steel fastening devices that provide strong and rigid connections to any building structure. A network of more than 190 licensed roof truss manufacturers across South Africa, provides a competitive and economic solution to even the most complex of roofing problems. This MiTek fabricator network, using MiTek’s state-of-the-art software programs, provides high quality, purposeengineered truss units to satisfy the need of an ever increasing complex roof market. The scope of MiTek’s services includes not only unrivalled expertise in terms of professional structural engineering service but also the extensive Research and Development into all aspects of timber and light gauge steel roof design and construction as well as a full range of manufacturing equipment - that makes MiTek a World Leader. creating the advantage World Leaders since 1956. MiTek Park,754 16th Road, Randjespark, Ext. 34, Halfway House,1685. Midrand (Head Office) Tel: + 27(0) 11 237 8700 Cape Town Tel: 021 905 0244 • Durban Tel: 031 700 6332 • Port Elizabeth Tel: 041 581 7525 email: marketing@mitek.co.za • www.mii.com/southafrica *MiTek
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Internationally patented alternative for structural timber launched to great acclaim A name brought to life by the older Eucalyptus plantation employees with whom Spencer Drake, Director and Inventor of the Biligom® product, worked, Biligom is a derivative of the word, 'Bloekom', Afrikaans for 'Bluegum' or Eucalyptus.
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ntroduced and showcased to a number of key stakeholders in the structural timber industry at an event hosted in conjunction with C&G Timbers in Johannesburg in mid-September, the product, specially treated with Lonza’s TanalithTM E under specific conditions, subverts all preconceptions that could come with using Eucalyptus as a structural timber, namely its propensity to split, warp, twist or crack when dried. With an introduction from father-son team, Spencer and Fred Drake, Philip Crafford, MSc Forestry student from the Faculty of Agri Sciences at Stellenbosch University, presented the findings of his thesis entitled, ‘An investigation of selected mechanical and physical properties of young, unseasoned and finger-jointed Eucalyptus grandis timber.’ Crafford’s research included the investigation of the Biligom® product under both wet and dry conditions, with a focus on
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the product’s physical properties, testing for strength and flexural properties with the ultimate conclusion that it is, in fact, not only suitable for use as a structural timber, but that it far exceeds requirements for structural timber. This was followed by information from Mike Newham, Technical Executive, MiTek Industries SA, who was pivotal in adjudicating the performance of Biligom as a structural component within truss structures where moist finger-jointed timber was fixed as if in a roof and allowed to dry to EMC (Equilibrium Moisture Content) in that configuration. Doug Sayce, General Manager of Lonza Wood Protection, responsible for the research and development on the TanalithTM E treatment processes for Biligom, took to the stage, detailing the story of Lonza’s involvement in the Biligom story, as well as the environmental advantages that come with treating Eucalyptus with TanalithTM E to SANS 1288.
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Pressure Treated Timber Timber with a moisture content below 20% cannot rot. This may not always be possible when used outside in exposed conditions as it requires proper application and maintenance of a suitable penetrating and water repellent wood sealer. The options are to use either naturally durable but expensive exotic hardwoods, or less costly locally grown non-durable Pine or Eucalyptus (gum) timber or poles, that have been pressure treated with a suitable wood preservative to the desired exposure or hazard class.
The H class system is a guide to help you buy the correctly treated timber for your project. Be sure to look for the required H class on the timber as well as one of the two quality marks given below.
Sustainable Timber Resource Timber is the most sustainable building product available to man. It’s naturally renewable. Over 90% of plantations grown in South Africa are FSCTM certified.
Hazard classes: H2— dry interior above ground H3— exterior above ground H4— in ground contact H5— in contact with fresh water and wet soil H6— in contact with marine waters
For more information on preservative treated timber, or where to find a SAWPA member, contact us on 011 974 1061 or sawpa@global.co.za or visit our website at www.sawpa.co.za
A member of
NEWS
Building professionals including architects, designers, builders and specifiers who design roofing structures with Biligom will be placed at a distinct advantage over other designers, as the Biligom TanalisedTM E pressure treated wood is a product verified by Ecospecifier Global. This verification is a guarantee to consumers and building professionals alike that all key manufacturer, health and environmental claims are third-party verified. Marnus Ferreira-Netto, Technical Sales representative at Henkel, discussed the role the company played since 2011 in developing the application of Purbond moisture curing adhesives for finger-jointed Biligom planks, and Nicholas du Preez, Auditor at the South African Technical and Auditing Services (SATAS), detailed the vision, mission and scope of the SATAS, its work in offering a world-class, standardised certification scheme, enabling their accredited clients to compete in the international arena, as well as the strict standards to which their clients must comply in order to become and remain SATAS accredited. Needless to say, the Biligom® product proudly bears the SATAS mark. Closing off the range of speakers was Fred Wagenaar, Executive Officer of the Institute of Timber Construction of South Africa (ITC-SA), whose input forms an integral part of the final signing off of engineered roofing and building structures, who highlighted what the Institute represents and how it regulates the structural timber industry in South Africa. His support for Biligom timber was eloquently presented. This was followed by a timber industry and market overview by Roy Southey, Executive Director of Sawmilling SA, whose insight pointed back to the impending Pine shortage, the need to address issues leading to this problem, and the role that Biligom may well serve in supplementing the need for structural timber in South Africa. Talks were followed by live demonstrations showcasing not only the strength of the Biligom® product, but also its ready acceptance of nail plates and nails, as well as its superior holding capacity for both nails and nail plates.
BILIGOM BOASTS A FULL RANGE OF ADVANTAGES: • Eucalyptus growers need to supply 5-8 year-old timber, significantly relieving the long-term pressure for more Pine plantations. • Biligom is graded to S7 specifications, meaning that around 28% less timber is required than Graded S5 Pine to cover the same roof area. • Roof truss fabricators can expect to use approximately 50% fewer gang nail plates for Biligom than for S5 Pine. MiTek Industries SA have adapted their software to cater for this in their roof truss designs. • Biligom is treated to H3 SANS 1288 specifications and is sold at around the same price as untreated S5 Pine. • Biligom is elegantly suited for low-cost housing developments due to its inherent strength and lower timber volumes needed to cover equal Pine roofing areas. • By using TanalithTM E for treating Eucalyptus, Biligom carries a very small environmental impact and the resource is infinitely renewable. • Structural and strength properties are backed by academic research conducted at the University of Stellenbosch.
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BILIGOM IS PRODUCED IN ALL POPULAR CONSTRUCTION TIMBER SIZES: • ˚38mm x 38mm/50mm/76mm/105mm/152mm and • ˚50mm x 76mm/152mm • Lengths are: 3.6m/4.2m/4.8m/5.4m/6m/6.6m With the potential impending shortage of structural Pine for the construction industry in the future, coupled with the significant growth time for suitably mature structural Pine, Biligom International is uniquely positioned to supplement this market with good quality structural Eucalyptus graded to S7 specifications, supported by a growth time of between only 5 and 8 years, and similar pricing to structural Pine. With the sound endorsement of a variety of key industry experts, Biligom is poised to take its national and international market share of structural timber to great heights with feet firmly planted in South African soil. For more information, visit www.biligom.co.za.
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BEE
The Amended BEE Codes and the Construction Sector Article by: Keith Levenstein, CEO of EconoBEE
T
he original B-BBEE Codes were released in 2007. The BEE Act does allow various industry sectors to issue their own sector codes, and nine sectors, including construction, have done so. The Construction Sector Codes were issued in June 2009. This implies that anyone in the construction sector has to follow the construction codes. The construction codes apply to any business involved in ‘construction related activities.’ This would, amongst others, include contractors and specialists, such as roofing contractors, painters, electricians, plumbers and even architects. In general, the construction codes – like all sector codes – are similar to the codes of good practice, with minor adjustments to the weightings or targets, and some definitions. In October 2013 the dti minister (the Department of Trade and Industry) issued the Amended Codes of Good Practice. These replace the existing codes and come into effect on 1 May 2015. After that date, all verifications will follow the Amended Codes. The Amended Codes do not replace the Construction Codes. Rather, the intention is to also amend the Construction Codes so that all businesses follow their version of the Amended Codes as of 1 May 2015. The problem is that it’s a long and arduous process for the sector councils to produce a revised sector code. There are many role players, each of whom wants to give their opinion to the revised Construction Codes. The Construction Sector Council is working feverishly on re-writing its sector code. Once it is finished and sent to the minister, it must be gazetted as a draft code and all interested persons will have the opportunity to comment. All comments must be collated and the codes must then be re-written and more consultation will take place. Eventually it must be presented to the minister for final approval and finally gazetted as a sector code. At the time of writing this, the dti’s intention was to have the draft issued roundabout September 2014. This is a challenging deadline that is not likely to be met, and even if it is, the public comment process and holidays will take us to the end of 2014. The re-writing process and additional consultation will then take many more months to be completed. The dti has announced that the sector codes will become applicable from the day they are finally issued. This makes it difficult for construction companies to become compliant next year. Right now we do not know what the construction codes will look like, but construction companies must undertake the required activities in order to be awarded points – a very unfair situation. What we are sure of is that the eventual Construction Codes will be similar to the Amended Codes, with the minor differences as mentioned above. We are not even sure that the Construction Codes will be ready by May 2015. Although the minister has not made an official announcement the rumours are, and it is logical that the dti will require all construction companies to follow the Amended Codes if construction is not ready.
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Keith Levenstein, CEO of EconoBEE
The best that a construction company can do is to understand and implement the Amended Codes in preparation for the Construction Sector Codes to be released.
SUMMARY OF THE AMENDED CODES The Amended Codes look fairly similar to the 2007 codes, although some weightings, targets and names of some elements have been changed. However, there are some major changes to approach and strategy that will be required. Note: instead of 7 elements, we now use 5, as follows:
OWNERSHIP: (25 POINTS)
This has not changed significantly. The targets are still 25%, and weighting is 25 points.
MANAGEMENT CONTROL: (19 POINTS)
The codes previously included two elements: management control and employment equity. Both elements have been consolidated into a single element, but with substantially the same indicators. Previously, management control and employment equity were worth 29 points combined. The new combined element is worth only 19 points.
SKILLS DEVELOPMENT: (25 POINTS)
Skills has increased from 15 points to 25, showing the importance of skills development in the economy. Some targets have increased: Target spend is now 6% of payroll, instead of 3%.
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ENTERPRISE AND SUPPLIER DEVELOPMENT (E AND SD): (44 POINTS)
The current codes speak of two elements: Preferential Procurement and also Enterprise Development. The new element Enterprise and Supplier Development (E and SD) is a simple combination of both elements. The two previously were worth 35 points. This has now increased to 44 points.
SOCIO-ECONOMIC DEVELOPMENT: (5 POINTS) The last of the five elements is unchanged at 5 points.
TOTAL: 118 POINTS
NEW POINTS TO LEVELS TABLE The minister has also changed the points to levels table as follows.
LEVEL
AMENDED CODES CURRENT CODES
1
≥100
≥100
2
≥95 but <100
≥85 but <100
3
≥90 but <95
≥75 but <85
4
≥80 but <90
≥65 but <75
5
≥75 but <80
≥55 but <65
6
≥70 but <75
≥45 but <55
7
≥55 but <70
≥40 but <45
8
≥40 but <55
≥30 but <40
Non-Compliant
<40
<30
In addition, the minister has exempted all businesses outside of the sector codes with an annual turnover of less than R10 million (previously R5 million) from all forms of BEE. Any organisation, no matter its ownership, is automatically level 4. Furthermore, any business that is 100% black owned and has an annual turnover of less than R50 million is automatically level 1. If that business is more than 51% black owned and less than 100% it is level 2. A QSE (qualifying small enterprise) which is currently any organization/business with a turnover of between R5 million and R35 million and follows a far more lenient scorecard, has been adjusted to R10 million to R50 million. However, other than for black-owned businesses, it still has to follow the entire scorecard with very few allowances or easier aspects to its scorecard than the generic.
PRIORITY ELEMENTS The minister has also defined three of the five elements as priority elements with additional targets. 1. 40% on Ownership’s net value 2. 40% of the Skills Development score 3. 40% of the Enterprise and Supplier Development score If a generic business does not achieve all three targets (two targets for QSEs), it drops one level. For more information, news on the Construction Sector Codes and strategies to maximize points, please feel free to e-mail Keith Levenstein at keith@econobee.co.za or visit www.econobee.co.za.
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Please contact us directly Morgan Advanced Materials Thermal Ceramics PO Box 587, Springs, 1560 Cnr Edison & Marconi Streets, New Era, Springs Tel: +27 11 815 6820/25 Fax: +27 11 362 4673 Distributors of our products Elements Galore – Tel: 011 664 8114 Hayward Refractories – Tel: 041 486 2043
Email: southafrica.tc@morganplc.com www.morganthermalceramics.com Company Registration No: 1975/02765/07
011 462 9122
bubb Alububble Manufacturing Process
bubble
RADIANT HEAT BARRIER
速
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Africa Thermal Insulations A DIVISION OF WEST RAND ENGINEERING
95 York Street, Krugersdorp. office: 011 462 9122 fax: 086 656 4376 www.alububble.co.za
ATI manufactures, markets and distributes building insulation and “green building” products throughout Africa. Utilising our state of the art laboratory and our association with WRE we are able to develop leading edge products through our extensive R&D and access to global best practise.
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ATI is a Corporate Member of the Thermal Insulation Association of South Africa (TIASA) and a member of the Green Building Council. The company operates at the highest level of business practises and ethical standards. We are committed to Africa, our Customers, our Staff and our Products with Service Excellence being the cornerstone of our mission.
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A DV E RTO R I A L
Well Schooled
Youngman Roofing supplies roofing and insulation materials to five schools around the Western Cape. Images: David Rogers
NEW BRACKENFELL SECONDARY SCHOOL Aimed to be completed by the end of 2014, this beautifully designed building is destined to be a landmark in the Protea Heights area with its attractive, light face-brick finish and elegant, modern light grey roof sheeting. The construction of the school became an urgent requirement, owing to the demand for another senior, public academic institution to serve the rapidly expanding Brackenfell area and surrounding communities. Situated in close proximity to most public amenities, as well as the Bastion Primary School, the slightly elevated building has a breathtaking view over another landmark – the world-famous Table Mountain. Clean lines lend to an extremely practical layout of both the blocks and facilities, rendering the building both easy and quick to access, whilst being fully wheelchair-friendly. The school will easily accommodate 1 000+ learners on completion, and will focus on mathematics and science, boasting laboratories and specialist rooms, hosting subjects like practical science and robotics. This will be complemented by a large and central quad area, amphitheatre and adequate sports facilities. The roof sheeting supplied was 0.53mm Diamondek 407 concealed-fix roof sheeting. With its superior ‘clipping’ action and benefits like ease of installation and an attractive, clean design, the Diamondek profile was an easy choice to complement the building. The material specified for the manufacture of the roof sheeting is the Clean Colorbond™ AZ150, with excellent, superior performance in terms of its resistance to corrosion, as well as outstanding colour retention.
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The colour specified, Shale Grey, is a newly introduced colour in the Clean Colorbond™ range, which is already growing in demand, and has a beautiful appearance when manufactured in the Diamondek profile.
PROJECT FACTS: ARCHITECTURAL FIRM: Groenewald Preller Architects ARCHITECT: Trudi Groenewald CONTRACTOR: Build A Way AREA: Protea Heights, Brackenfell, Cape Town COMPLETION: Projected end 2014
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A DV E RTO R I A L
MELKBOSSTRAND SECONDARY SCHOOL Completed in 2012, this attractive building, with its beautiful, light face-brick finish, and strong, clean roof lines, is situated in the West Coast town of Melkbos just 35 minutes from Cape Town, with the picturesque Atlantic Ocean just a few hundred metres away. The construction of the school was necessary to serve the growing school-going population of the greater Melkbosstrand area and surrounding communities. With a classical look and feel, the layout of the blocks and facilities makes the school highly accessible, with the capacity to comfortably accommodate 1 100 learners, with 27 classrooms, a library, specialist rooms and laboratories. These focus classrooms are complemented by a sizeable hall and sports facilities. The roof sheeting supplied was Diamondek 407 concealed-fix roof sheeting in 0.53mm thick material. With its superior ‘clipping’ action, the Diamondek sheeting was a necessity due to the school being situated in a high wind area. Added benefits were the ease of installation and the attractive, clean and strong lines articulated by the high-standing ribs, which complement the design cues of the building. Certain of the roof sheets were manufactured on the construction site, which was made possible by the availability of a mobile machine or ‘mill’. The material specified for the manufacture of the roof sheeting is the AZ200 Clean Colorbond™ Ultra, (a product which is designed specifically for application in close proximity to marine environments), with excellent, superior performance in terms of its resistance to corrosion and colour retention. Insulation utilized was Thermocoustex Fibre in roll form, (designed and developed to insulate both thermally and acoustically), with superior performance and ease of application. Thermocoustex was used in combination with other insulation and ceiling materials, proving its versatility.
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PROJECT FACTS: ARCHITECT: Neil Wilson Architects CONTRACTOR: Granbuild AREA: Melkbosstrand, Western Cape COMPLETION: 2012
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A DV E RTO R I A L
Kensington High School
KENSINGTON HIGH SCHOOL & PORTIA & HEIDEVELD PRIMARY SCHOOLS Kensington High School, Portia Primary School and Heideveld Primary School are replacement schools built as part of the Department of Basic Education's Accelerated School Infrastructure Development Initiative (ASIDI) Programme. The original temporary structures were built around 40 years ago to accommodate learners. The new school buildings attempt to restore a measure of dignity to the communities, and to empower its people. The buildings are traditionally arranged around quadrangles or courtyards, protected from the south-easterly wind on the Cape Flats. Enclosed and covered internal courtyards allow protection from the elements during rainy days at Portia and Heideveld Primary Schools.
Portia Primary School
The simplicity of the perimeter blocks is broken and contrasted by the expressive form of elements, which contain special functions and significance. These include the front gate area and staff room, the main staircase, and main circulation areas. These are all coded in bright colours and confront the rigidity of the classroom blocks. The faรงades are articulated with sun louvres and deep recesses in response to climatic considerations, and water towers feed banks of school toilets from boreholes on the property. The schools are capped and celebrated with bright colours on the flat roofs, rendering them landmarks that playfully punctuate the surrounding suburban landscape. Portia Primary School
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AUTHORIZED DISTRIBUTOR OF LAMBDABOARD AND MODEK TRANSLUCENT SHEETING Cnr Berkley and Bax Roads, Maitland 7405
New Youngman premises: Architecture by Martin Commerford of DHA and interiors by Leon Saven Design
A DV E RTO R I A L Heideveld Primary School
The roof sheeting supplied was Shale Grey Diamondek concealed-fix roof sheeting in 0.53mm Colorbond™ AZ150. The Diamondek profile is a modern, aesthetically pleasing profile, which lends itself perfectly to the building design. The ultimate appearance is striking and cohesive. Also, the profile is well suited for use on these buildings due to its superior ‘clipping’ performance and class-leading drainage properties. In terms of insulation and ceiling materials employed in the project, Thermocoustex thermal and acoustic insulation was supplied in different forms, namely Thermocoustex Fibre Board, Thermocoustex Fibre in roll form, and Thermocoustex Boards with a white vinyl finish. Besides the excellent performance, both acoustically and thermally, the products are easy to use, and kind to the environment (certified ‘Green’). Applications varied from cladding to over-purlin fitment, as well as finished ceiling.
A TEACHER’S COMMENT TO THE PHOTOGRAPHER DURING THE SHOOT: “In the old days we taught in cardboard boxes and could hear everything the other teachers were saying in the next-door classrooms. Now we have these new schools (where) we can teach in private.” Integral to the project was relocating the existing school operation into new temporary buildings, the construction of the new school buildings, the relocation of the school operation into the new buildings after construction and the demolition of the last of the old buildings to make way for the new sports fields.
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Heideveld Primary School
PROJECT FACTS: ARCHITECTS:
Meyer & Associates Architects, Urban Designers PROJECT TEAM: Tiaan Meyer, Etienne du Plooy, Ann-Mari da Silva, Jaco van Biljon STRUCTURAL ENGINEERS:
Worley Parsons Consulting Engineers CIVIL ENGINEERS: Worley Parsons Consulting Engineers ELECTRICAL ENGINEERS: Mapule Consulting QUANTITY SURVEYOR: 2iiConsulting Quantity Surveyors CONTRACTOR: Basil Read AREA: Cape Town, South Africa COMPLETION: 2014
For more information, visit www.youngman.co.za.
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INTRODUCING THE NEW SUN FAN FROM ROOF RATS
Solar powered Thermostatically controlled Roof Extractor Fan Fan Size: 355mm Galvanized Steel and Aluminium Motor: 24V DC Power: 18W Mass: 16kg Size (cm): 58x58x37 Airflow: 2805m³/h Static Pressure: 5.5kPa Colour: Teracotta or per client specification Thermostat (Optional): 35ºC Normal Open Winner of the 2013 - Sage Pastel / 702 Small Business Awards
OFFICE: 011 057 7020 | E-MAIL: info@roofrats.co.za | WEB: www.roofrats.co.za
A DV E RTO R I A L
Atlas Roofing: 7 simple steps Atlas Roofing has been manufacturing, supplying and installing SIPs (Structural Insulated Panels) for various projects since 2006.
M
ajor projects have been completed in Durban (Elangeni Hotel), Polokwane (MTN Call Centre) and Pretoria (Vodacom Call Centre).
Currently, Atlas Roofing is working in conjunction with GD Irons Construction on the US Aid project in Groenkloof, Pretoria, and with Atterbury Properties on the Lynnwood Bridge Phase 3 project. Atlas roofing completes the job in seven simple steps:
STEP 1: LAMINATION Atlas Roofingâ&#x20AC;&#x2122;s structured panels consist of three basic elements: ceiling board, polyurethane foam and oriented strand board. These three products are laminated together with an adhesive product and pressurized overnight as part of the curing process.
STEP 2: START TO SITE The SIPs are delivered to site.
STEP 3: LIFTING SIPs ONTO STRUCTURE The SIPs are lifted onto the steel/timber structure with a crane.
STEP 4: ARRANGING SIPs The boards are arranged according to the fixing process.
STEP 5: FIXING Using 125mm-150mm tex screws, the panels are fixed onto the trusses.
STEP 6: WATERPROOFING Starting with a bituminous primer, then either bituminous torch-on or shingles as the top coat.
STEP 7: FINISH Finishes depend on the clientâ&#x20AC;&#x2122;s preference.
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A DV E RTO R I A L SIP MAKE-UP Structural Insulated Panels are made up of various elements, collectively providing a strong, multipurpose roof panel with excellent structural, thermal and aesthetic values. They are made up as follows: • Magnesium oxide ceiling board: 9mm • Polyurethane foam insulation: 80mm • Oriented strand board: 11mm • Mineral torch-on or bitumen roof shingles
SIP ADVANTAGES Structural Insulated Panels offer a number of advantages, including: • Energy efficiency • Lower electricity bills • Help to maintain acceptable temperatures • Reduce carbon footprint • Improve acoustics • High R-value rating • Low U-value rating • Speed of installation • Can be used in conjunction with photovoltaic panels
FOR MORE INFORMATION, CONTACT: Natie Smit (t) 012 329 4545 (c) 082 905 8815 (e) leadership@absamail.co.za (w) www.atlasroofing.co.za
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fasteners direct (Pty) Ltd Established since 1978 Fasteners Direct (Pty) Ltd., (formerly Fandany Engineering (Pty) Ltd.), has been a leading supplier specialising in the manufacture and import of Standard and OEM quality fixings and fasteners for the roofing and construction industry. Today we stock well over 18 000 fastener and fixing line items and offer a world of fasteners and fixing solutions for all applications in industrial, automotive, mining and construction industries.
FOR GENERAL ENQUIRIES AND QUOTES PLEASE CONTACT US: TEL : +27 (012) 541-3336/7 EMAIL: martin@fastenersdirect.co.za WEB: www.fastenersdirect.co.za
As a leading manufacturer and importer of quality fixings for more than 30 years, we provide value-added service and support to all our clients through not only our competitive pricing, but also our technical training, support and continued researchinto new and alternative fixing solutions for almost any industry. Should you require any specialised fixing solutions, feel free to give us a call for further assistance.
CALL 0861 727 663 TO BOOK YOUR SA ROOFING ADVERTISING SPACE!
CALL 0861 727 663 TO BOOK YOUR
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I N S U L ATI O N
Thermal advantage of Insultrak™ Roof Insulation spacers/packers in an over-purlin fibre-glass roof installation D&D Roof Insulations, the manufacturers of the Insultrak™ roof insulation spacer system have had the ASHRAE Zone Method calculation performed in order to compare the thermal resistance performance of faced fibre roof insulation installed with and without Insultrak™.
T
he ASHRAE Zone method is a series/parallel calculation of heat flows and incorporates an edge effect zone that approximates the tendency for heat to enter and leave highly conductive elements which might intrude through a system (ASHRAE Fundamentals Handbook 2009, vol. 27.5). The calculation of width of edge effect is in accordance with guidance given in ISO 6946.
RESULTS The results may be summarised in absolute terms or as a percentage reduction relative to an installed thickness of fibre insulation:
THERMAL RESISTANCE (R-VALUES IN M2K/W): • 100mm fibre insulation installed over-purlin under roof sheet without Insultrak™ – 1.49 • 100mm fibre insulation installed over-purlin under roof sheet with Insultrak™ – 2.16 • Percentage increase in Thermal Resistance (R-value) with Insultrak™ – 45%
COMMENTS ON RESULTS The absolute value obtained correlates extremely well with results of hot-box testing of installed 101.6mm (4 inch) fibre published in the ASHRAE Fundamentals Handbook 1985 Table 5C. The calculated result is obtained by assuming a net average 60mm of effective thickness of fibre as a result of the caternary effect and the compression of the fibre by the purlins and supporting wires. The average effective thickness of fibre with the Insultrak is similarly very conservatively estimated at 80mm. In practise the fibreglass insulation achieves its full thickness of 100mm nearly across the full span of an 1 800mm purlin centre.
Insultrak TM Spacer
Insultrak TM Spacer
100mm Faced Fibre Insulation Full 100mm thickness achieved
FOR FURTHER INFORMATION CONTACT D&D ROOF INSULATIONS:
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(t) 012-800 3606 (e) info@roofinsulation.co.za (w) www.insultrak.co.za | www.roofinsulation.co.za
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(Prov. Patent No: 2014/1404)
Roof Insulation Spacer/Packer
Insultrak™ is a roof insulation spacer system designed specifically for use with faced flexible fibre roof insulation materials in over-purlin roof applications. Insultrak™ is manufactured from a lightweight high density closed cell rigid foam and supplied in standard dimensions as required for the relevant thickness of insulation. By being used as a packer between the insulation and the roof sheet, Insultrak™ provides the necessary spacing to allow the insulation to attain maximum installed thickness in the application, and significantly reduces backward pressure on the roof sheet or clip system. Due to the fact that Insultrak™ is manufactured from a highly efficient insulation material, it further enhances the thermal value of the final system and negates thermal bridging which may occur with other types of materials.
Insultrak™ has the following value added benefits: • Ultra lightweight – adds no mass to the structure • Excellent thermal value – Thermal Conductivity (K-Value) 0.024 W/m°C • 100% Closed cell structure – impervious to moisture or water absorption • High density – 32-36kg/m³ • High compressive strength - 160-310 kPa depending on thickness • Fire tested and approved for use in the required application • Can be combined with other approved roof insulation materials to improve thermals
Application Methodology The Insultrak™ spacers are simply laid over the insulation on top of the purlin before fixing of the roof sheet, or clip system for secret fix roof sheeting. The roof is then fixed down in the standard method applied for the relevant roof sheet with the addition of longer fixing screws to accommodate the packer. Insultrak™ is supplied in standard 3m lengths which are 75mm wide and available in the following thicknesses: 25mm; 40mm and 75mm. Alternative thicknesses may be produced upon request.
Concealed Fix clip
Roof sheet
Thickness
Compressive Strength
Standard Length
Insulation Thickness
25mm
160kPa
3 metre
50mm - 75mm
40mm
190kPa
3 metre
100mm - 135mm
75mm
340kPa
3 metre
150mm +
Insultrak™ Fire Performance
Purlin
Insulation
Insultrak™ has been fire tested according to the SANS 428 application test for over-purlin roof insulation systems with an A1 fire rated faced fibre and found not to present a fire risk or support flame spread. (Report available upon request) E-mail: info@insultrak.co.za | Tel: 012-800 3606 | Fax: 012-800 3835
www.insultrak.co.za | www.roofinsulation.co.za
A S B E S TO S
Asbestos:
What you need to know The term ‘asbestos’ refers to a group of minerals with extraordinary strength, good thermal and electrical insulation, and fairly good resistance to chemicals.
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reathing in air containing asbestos dust over an extended period of time can lead to the development of asbestos-related disease. Asbestos fibres cannot be absorbed through skin. Anyone who disturbs asbestos that has deteriorated or been damaged, resulting in the release of asbestos dust into the air, may be at risk of inhaling asbestos fibre.
ASBESTOS WASTE MATERIAL MAY ARISE FROM: • Friable (raw) asbestos waste (i.e. material that, when dry, can be crumbled, pulverised or reduced to powder by hand pressure, e.g. raw asbestos, asbestos rope, asbestos insulation), which poses a significant health hazard, as it may easily become airborne and be inhaled. • Non-friable asbestos waste (i.e. material that, when dry, cannot be crumbled, pulverised or reduce to powder by hand pressure, e.g. asbestos cement products), where the asbestos waste is mostly in the same condition as when manufactured, and is less likely to release asbestos fibres.
USES: Although there is now a ban on the use and sale of asbestos products, asbestos may still be found as used or waste products in the form of seals and gaskets (rope, tape, flanges, etc.), friction products (clutch plates and brake linings), raw asbestos (thermal and acoustic insulation) and, most commonly, cement products (roof sheets, gutters, downpipes, pot plant containers, etc.). The raw asbestos poses the greater health risk, while the asbestos-cement products pose a significantly smaller health risk.
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In 2002, a major producer of asbestos-cement products switched to producing only asbestos-free products, which replaced the asbestos fibres with synthetic fibres, thereby eliminating the potential health risk.
APPLICABLE NATIONAL LEGISLATION PERTAINING TO ASBESTOS: • Occupational Health & Safety Act: Act 85 of 1993 • Asbestos regulations, 2001 • Environmental conversations Act: Act 73 of 1989 • National environmental management: Waste Act: Act 59 of 2008 • National Health Act: Act 61 of 2003
HANDLING AND MAINTENANCE: The general public may occasionally be exposed to asbestos dust when performing work on asbestos-containing products (most likely asbestos-cement products). • Handle all asbestos products (i.e. asbestos-cement material) with care and avoid breakages that may release asbestos dust. • Do not apply any abrasive techniques when cleaning the asbestos-containing material, e.g. grinding, sanding, and drybrushing. • Avoid cutting or drilling into asbestos-cement material, unless under controlled conditions (e.g. slow-speed cutter using wet methods in addition to wearing a suitable respirator – type FFP2).
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WHO CAN HANDLE ASBESTOS?
We pride ourselves in the way we work with asbestos and the way we handle it. Regular training and health and safety courses for our employees ensure a safe work environment. We can remove the asbestos and install insulation and roofing at the same time, while your production remains uninterrupted. We have completed various projects ranging from 32m² to 10 000m² and have worked for companies such as Coca Cola, Clover, Basil Read and Tailormade Properties. We work all over South Africa and no project is too big or too small.
A S B E S TO S
• Keep all asbestos-cement products free from moss and lichen growth. Where required, asbestos-cement surfaces can be treated with a suitable fungicide, after which a lowpressure hose and stiff broom can be used to remove all moss and lichen. Thereafter, the asbestos-cement surface can be painted or sealed with a suitable protective coating to limit the release of asbestos dust, combat weathering and inhibit the growth of moss and lichen. Further, it is advisable that a registered asbestos contractor be utilised to clean, treat and seal asbestos cement products, and to handle and remove asbestos waste products in accordance with the relevant legislation. • Under specific working conditions (i.e. demolition/ construction work), it is a legal requirement that the service of a registered asbestos contractor be obtained to remove and dispose of asbestos-containing waste.
WHO TO CONTACT? For any queries or enquiries please contact Albie Klein: (o) 087 0494 103 (c) 084 4534884 (e) info@arar.co.za (w) www.arar.co.za
Asbestos Rehabilitation and Removal, better known as ARAR was formed due to the great demand for asbestos work. The company was formed in 2011. Thermal Barrier Coatings SA, a subsidiary of ARAR, which specializes in thermal insulation, roofing, waterproofing and, more recently, demolition. We can therefore now assist with asbestos rehabilitation and removals, demolition, roofing, waterproofing, insulation and roof painting. Working in close conjunction with the (AIA) Asbestos Inspection Authorities, ARAR ensures that all relevant legislation is adhered to.
ASBESTOS
IN THE WORKPLACE! What is the employer’s obligation?
Reg 4 of Asbestos Regulation NoR155, 10 Feb 2002 No employer or self-employed person shall require or permit any person to work in an environment in which he or she would be exposed to asbestos in excess of the prescribed occupational exposed limit.
ASBESTOS REHABILITATION & REMOVALS is a registered asbestos contractor with the Department of Labour and can assist with the following: Asbestos assessments Asbestos management 3 Asbestos cleaning 4 Asbestos removal 5 The safe disposal of all asbestos with clearance certificates 1
2
www.arar.co.za
For professional service with peace of mind contact us at 087 0494 103 or email riaan@arar.co.za.
TEC H N O LOGY
Isover launches new insulation solutions app Isover South Africa has launched an app on Android and Apple for tablets and smartphones, making use of the latest technologies to provide customers, architects and all participants in the building and industrial chain with all the relevant information on existing insulation solutions.
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he app offers a choice of Isover solutions and products organized by product range and markets.
In addition to the app, Isoverâ&#x20AC;&#x2122;s digital strategy also incorporates QR codes and an interactive website which includes online tools for truck loading capacities and legislation calculation tools. For more information, visit www.isover.co.za.
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• Metal Buildings • Shopping Centres • Commercial Buildings • Warehouses • Schools • Hospitals
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R E S I S TA N C E
TH
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Factorylite insulation meets the requirements VA L
UE
Tel: 0860 ISOVER (476837) Fax: 086 673 1088 www.isover.co.za Download the isover SA app
I N S U L ATI O N
More Sustainable EnergyEfficient Insulation for Construction At the recent Interbuild Africa 2014 Expo, Mohammed Sami, Commercial Leader - Sub Saharan Africa at Dow Polyurethanes, gave a key speech on new innovations from Dow and how they ensure more sustainable energyefficient insulation for the construction sector.
Mohammed Sami, Commercial Leader - Sub Saharan Africa at Dow Polyurethanes.
TRENDS & MARKET DRIVERS IN THE CONSTRUCTION MARKET The growing influence of sustainable building initiatives is driving the demand for advanced construction materials that contribute to the energy efficiency of buildings, helping to reduce their carbon footprint. Ever-increasing emphasis is being placed on, inter alia, higher fire safety ratings and lower CO2 emissions.
TEST
TEST
REGION
Norm EN 13501-1 (Euroclass) Test EN 11925-2 Fire Reaction Test EN 13823 (SBI)
Europe
For example, insulated metal panels (IMPs) as used in the construction industry are facing more exacting requirements. Traditionally, the panel processing entails RF-DBL (Rigid-Faced Double Belt Lamination), which is a continuous process for producing steel-faced, foam-filled building panels. Currently PUR (Polyurethane) and PIR (Polyisocyanurate) insulated metal panels are the preferred materials or systems of choice for lightweight building envelopes.
FM 4880
Fire Reaction
USA
LPS 1181
Fire Reaction
UK
Norm EN 13501-2 Test EN 1363 Test EN 1364-1
Fire Resistance Europe
FIRE SAFETY REGULATIONS
Norm LPS 1208 Test BS 476-22
Fire Resistance UK
When construction products need to be in compliance with stringent combustibility standards for both fire reaction and fire resistance, PIR foams are increasingly utilized due to their advantageous fire behaviour (see Table 1).
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FIRE REACTION AND FIRE RESISTANCE â&#x20AC;&#x201C; INTERNATIONAL REGULATIONS AND INSURANCE STANDARDS
Table 1
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PUR insulated metal panels are utilized by many players in the construction industry as a traditional technology of choice and represent the best option for prefabricated sandwich structures. Dow has a broad solutions offering for the construction insulation industry tailored to match customers’ requirements and equipment (see Table 2).
DOW SYSTEM VORACORTM CM Series VORATHERM CN Series
TM
TECHNOLOGY
The Dow VORATHERM™ PIR Series for construction panels is a versatile solution for the construction industry due to its excellent fire properties, good thermal insulation, balanced processability, remarkable panel durability, and characteristics of being lightweight yet structurally sound. Metal panels insulated with these Dow foam systems bring excellent performance that meet the stringent fire classification requirements of the construction industry according to Euroclasses, FM-North American and other insurance standards.
FIRE REACTION
FIRE RESISTANCE
PROCESSING LINES
B2-PUR
Bs2d0 Euroclass
N/A
Traditional
B3-PUR
Cs3d0 Euroclass
N/A
Traditional
PIR
Up to Bs1d0 Euroclass
EI 30/60
Traditional, Dedicated
I N S U L ATI O N
DOW TECHNOLOGY FOR CONSTRUCTION INSULATION
Table 2 Dow VORACOR™ Polyurethane systems are available for the production of panels and boards according to the continuous (RF-DBL) and discontinuous (DCP) production processes.
BENEFITS: • Fire rated and not fire rated options available • Broad blowing agent offering: HFC (245fa and 134a365/227), hydrocarbons, HCFC • DCP systems are available with a pre-blended broader range of blowing agents, including full water blown generation-2 technology • HFO / Low GWP non-flammable new blowing agents are available
VORATHERM™ CN 600
They are customizable to meet customer and specification requirements, and compliant with the most demanding standards in various geographies – a great choice for a variety of panel applications.
NEXT GENERATION PIR FOR CONSTRUCTION PANELS The next level PIR construction panel technology uses halogenfree flame retardants and enables the best fire rating. The VORATHERM™ CN 100 Series allows manufacturers of IMPs via RF-DBL to produce panels able to meet the growing interest in halogen-free flame retardant additives for construction insulation materials, while retaining the stringent flammability performance required by the construction industry. VORATHERM™ CN 100 Series insulated metal panels have proven to be able to achieve up to Euroclass B-s1,d0 and FM 4880 approval fire ratings (see Table 3).
VORATHERM™ CN 800
VORATHERM™ CN 100 (NEW)
TYPICAL CERTIFICATION Reaction to Fire *
Euroclass B-s2,d0
Euroclass B-s2,d0
Up to Euroclass B-s1,d0
Resistance to Fire *
EI-15
EI-30/60
EI-30/60
TYPICAL THERMAL INSULATION VALUES Initial Lambda mW / (mK) at 10 °C
18 - 20 TYPICAL PROCESSABILITY
Temperature of Conveyor (°C)
40-50
60-65
60-65
Adhesive Layer
Not Required
Available on Request
Available on Request
* Numerical flame spread or fire classification are not intended to reflect hazards presented by this or any other material under actual fire conditions.
Table 3
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I N S U L ATI O N
DOW TECHNOLOGY FOR DISCONTINUOUS PANELS PRODUCTION Although PUR-cored insulated metal panels are the insulation technology of choice in many construction applications for buildings, panel manufacturers are looking at technologies that improve the k-factor of the foam and increase the productivity of high-thickness panels in order to improve the energy efficiency profile. Dow has introduced its PASCAL™ PRO technology for DCP Production, which can work with any blowing agent and offers a faster cycle time at 40% improved productivity, 10% lower applied density, and 5% improved thermal insulation.
PASCAL™ PRO: BRINGS STEP-CHANGE IMPROVEMENTS WITH SEVERAL FIRE-RATINGS AND BLOWING AGENT TECHNOLOGIES.
CONSTRUCTION INSULATION DEVELOPMENT CENTER – CE|DE|PA Dow and SAIP Equipment – a global leader in the development and realization of advanced machineries for the polyurethane industry – have jointly started operating ce|de|pa in 2011. ce|de|pa is a state-of-the-art, independent and industrialscale line conceived to allow Dow and SAIP customers first, and the construction industry at large, to accelerate the development of novel solutions for the manufacturing of PUR-made panels for thermal insulation. By accessing ce|de|pa, they can test, prototype and develop their own PUR-made panels for thermal insulation produced with a continuous lamination process, leveraging the continued availability of this advanced line supported by local quality control laboratories. Thanks to the continued availability of the new ce|de|pa line, it will be possible to simulate all phases of the industrial production of continuous panels in polyurethane for thermal insulation, developing novel solutions able to further differentiate them on the global market. More information is available at www.cedepa.org. For more information on Dow, its VORACORTM PUR and VORATHERM™ PIR Insulation Systems and its PASCAL™ PRO technology, visit www.dow.com. Contact: M. Sami, Dow Polyurethanes South Africa, Phone: +27 11 575 1547
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www.ashandlacy.co.za
Ashgrid Spacer System
Raises the Bar Creates a structurally sound roof cavity to accommodate insulation requirements prescribed by SANS 10400 XA in new build and refurbishment PROVEN QUALITY
Manufactured to international standards (BS EN ISO 9001: 2000) & UKAS accredited • Tested and used internationally • First in South Africa • 55 million lineal metres of the ASHGRID SPACER SYSTEM has already been used in the UK, Europe and Australia
ENERGY EFFICIENT
Enables the formation of a defined structural cavity to accomodate insulation • Prevents compression of insulation allowing it to perform to specification • Dramatically reduces energy consumption
MOST ADAPTABLE
Ideal for over-roofing • Eliminates consequential damages due to movement and inclement weather • Brackets fitted with EPDM base eliminating thermal breaks
EASY & EFFICIENT TO INSTALL
Easy and safe insertion of brackets (from the side or from the bar ends) • “Twist & Lock” application • Fewer components • Reduced installation times • Brackets can be easily repositioned if required
STRUCTURALLY SUPERIOR
Safe-Loc™ spigots – fast, secure and safe bar joints • New high performance brackets with deeper ribs for improved structural performance • No requirement for anti-sway brackets below 250mm construction depth • Allows continuous load transfer throughout the bar run • Deep ribbed bar, ensuring optimum fixing efficiency for the top sheet • High fixing torque and increased pull-out strengths achieved • Non-combustible
TECHNICAL BACK UP
Comprehensive technical backup • Nationwide distribution
M +27 832151782 (International) F 086-5376079 E dion.marsh@ashandlacy.com
WATE R PROO F I N G
Roofing & Waterproofing Institute hosts successful Good Practice Seminar The Good Practice Seminar hosted by The Roofing & Waterproofing Institute (RAWI) at the Allan Gray Auditorium in Cape Town drew a strong representation of industry leaders and regulators. The seminar was attended by facility managers of educational institutions, body corporates, hotel maintenance, corporate managers, insurance assessors, consultants, contractors and business owners. The delegates were interactive as they participated in discussions about raising industry standards and how to ensure best practice. SEMINAR OBJECTIVES: 1. To minimise call-backs and poor workmanship through education and training. 2. To raise standards in the property maintenance industry. 3. To equip maintenance staff with best practice principles for weather sealing of buildings, namely roofs, walls, windows and all else that is intended to keep a building watertight. 4. Opportunity to have maintenance staff skills assessed via the accredited training programme. There is no doubt that the industry is in dire need of training. BIBC and the NHBRC agreed with other industry regulators and various panellists that training was the main reason for poor workmanship. It was concluded that happy consumers will mean industry growth and a return on investment for the industry on the whole. There was a sense that unskilled labour was used to do skilled jobs, perhaps not specific only to the waterproofing and roofing industries, but that this was certainly having a negative impact in more ways than one. CETA identified the need for the professions to move forward to gain status and accreditation in the industry, as was the case in electrical and plumbing industries. With 2014 being declared ‘Decade of the Artisan,’ the launch of the National Waterproofing Certificate is a timely gesture towards the upliftment of industry standards and is poised to help close the training gap. In partnership with Northlink College, the National Waterproofing Certificate is seen as significant in developing the industry and as long overdue. Northlink College also emphasised the importance of learnerships and apprenticeships in the industry, and that OSBP (Onsite Best Practice) is instrumental in not only rolling out the certificate, but they are able to assist with skills assessment for industry workers and offer an opportunity for project managers, building managers, facilities mangers, etc. to become assessors of all work completed by contractors. This in turn means quality workmanship is guaranteed, saving time and money. RAWI supports this industry initiative 100% and although it is being launched in the Western Cape, plans are under way to include Gauteng in the rollout for skills training among waterproofers.
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Accelerate Cape emphasised innovation as being the one factor that drives growth and this is exactly what the national certificate rollout is based on. The waterproofing industry has needed something to ground its existence and reputation and ‘staying dry’ is certainly going to be looked at very differently in future and will be respected more by the wider community and the building and construction industry. The very first Award of Excellence was launched to reward excellence in the workplace. This was awarded to Christopher Norbury on behalf of his late father, Steve Norbury. RAWI plans to sponsor the next winner of the award a trip to the International Waterproofing Competition taking place in Austria during 2015. Lloyd O’Ryan of ABE and Anthony Webster of Sika also received their certification for completion of their accredited waterproofing facilitation course.
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E V E NT S
Interbuild Africa 2014 shows positive industry growth trends The organisers of Interbuild Africa 2014 are pleased to announce some of the positive trends noted at this year's event, which was held from 20-23 August 2014, at the Johannesburg Expo Centre.
E V E NT S
I
E V E NT S
nterbuild Africa enjoyed a highly successful show. Together with its co-located events – Glass Expo Africa, Plumbdrain Africa, EcoAfribuild, Hardex Africa and Woodpro Africa – the expo welcomed a total of 6 727 visitors. “Although our previous show, Interbuild Africa 2012, welcomed just over 9 000 visitors, it is important to note that a direct comparison in visitor numbers to the 2014 show would not provide an accurate representation for the following reason,” says Gary Corin, Managing Director of Specialised Exhibitions Montgomery. “In 2012, Interbuild Africa was co-located with Frigair, an event which attracted just over 3 000 visitors. Given that Frigair now runs separately to Interbuild Africa, there has been an adjustment in visitor attendance numbers.” Corin says that when making a direct comparison to the profile and number of visitors, which specifically attended Interbuild Africa and its co-located shows in 2012 and 2014, Interbuild Africa 2014, welcomed an additional 1 000 visitors. “This represents an increase of 15%, compared to the 2012 show, and suggests that the industry is experiencing a very positive growth trend,” he added. Corin notes that another positive trend is the ever-increasing number of international visitors to the show, demonstrating higher numbers in 2014, than at the 2010 and 2012 shows. Interbuild Africa 2014 welcomed more than 300 international visitors from across 46 countries. The vast majority of visitors to the show included company managing directors and business owners, as well as those individuals responsible for procurement, some with purchasing power of up to R10 million. The show organisers have also noted an increase in the number of architects, civil engineers and independent contractors attending the event. “With a legacy spanning over 46 years, together with the ongoing support of the leading industry bodies and associations, Interbuild Africa has become the leading building and construction exhibition in Africa,” says Corin. “Since its launch in 1968, Interbuild Africa has become the definitive showcase for exhibitors to demonstrate new product launches and innovations,” he adds. Interbuild Africa 2014 welcomed more than 300 exhibitors, many of whom have already reported significant sales leads and new client orders, as a direct result of their participation at the show. “It’s the perfect platform for exhibitors to showcase their products, make valuable contacts and generate lucrative sales leads,” says Corin. The success of this year’s show demonstrates the value of strategic partnerships. Interbuild Africa has enjoyed the full support of the most respected industry bodies and associations, many of which were instrumental in ensuring that the show was packed with industry-relevant conferences and free-toattend seminars. The 2014 conferences and workshops were hosted by The South African Light Steel Frame Building Association, the Association of Quantity Surveyors South Africa, South African Glass Institute, South African Glass and Glazing Association, as well as the Association of Architectural Aluminium Manufacturers of South Africa.
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Interbuild Africa 2014 also enjoyed the support of leading industry bodies, including the National Home Builders Registration Council, the South African Bureau of Standards, the Concrete Institute, the Institute of Plumbing South Africa, and The Master Builders Association of South Africa, which hosted its annual board meeting at Interbuild Africa 2014. Interbuild Africa was proud to launch and sponsor a number of new Student Award Initiatives in collaboration with the Association of South African Quantity Surveyors (ASAQS) and the South African Institute of Architects (SAIA). The objective of these initiatives is to encourage and empower young talent in the industry. “Overall, we are pleased with the number of quality visitors who attended Interbuild Africa 2014,” says Corin. “Given some of the valuable feedback received from visitors and exhibitors at this year’s show, we are already putting plans in place for the introduction of some exciting new features at our 2016 edition of Interbuild Africa, which will take place from 17-20 August 2016 at the Johannesburg Expo Centre, Nasrec,” he concluded.
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E V E NT S
QUALITY AND INNOVATION Our roofing systems protect thousands of homes, commercial and industrial buildings. Achieving a good looking product is not sufficient in competitive global markets. It is attention to detail in the manufacturing process that has earned our roofing systems an international reputation for excellence.
PRODUCTS
TRADE ENQUIRIES
• DURA “V” Tile • Corrugated Profile (S-rib) - Galvanised and Colour Coated • Widespan Profile - Galvanised and Colour Coated • Bullnosing and Cranking - Galvanised and Colour Coated • Roofing accessories • Roll Formed Sections • DURATRUSS - light weight stell trusses
tel: 031 940 4484
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email: info@steelworld.co.za
Steelworld ensures its highest standards in quality and aesthetic appeal keeps in line with Steelworld hallmark in quality and innovation.
www.duraworld.co.za
EXTRAORDINARY CHOICE A Fusion of technology in 7 layers for strength and protection The quality roofing solutions that saves you time and money
IF IT DOES NOT SAY “D” IT’S NOT A DURAROOF TILE
PRODUCTS
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Products
Export
• DURATILE • DUROMA • DURASPAN • DURA V TILE
• DURATILE • DUROMA • DURASPAN • DURA V TILE • Roofing accessories
tel: 031 940 4484
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email: info@duraroof.co.za
DURAROOF ensures its highest standards in quality and aesthetic appeal keeps in line with DURAROOF hallmark in quality and innovation.
www.duraroof.co.za