Construction World February 2017

WOOD CONSTRUCTION

Buying and using preservative treated timber? In South Africa treated timber is by law required to comply with national and compulsory specifications and must bear marking containing the following information:

South African Wood Preservers Association (SAWPA) The South African Wood Preservers Association (SAWPA) is a non-profit association formed in 1980, by the South African wood preserving industry, primarily to promote timber treatment and treated timber products. Commercially grown timber in Southern Africa is mainly of the Eucalyptus and Pinus species, both of which are not durable. By applying the correct chemicals to these timbers ensures that the timber performs as if it were durable thereby giving predictable long life performance.

Choose the correct hazard class H6 – High hazard: prolonged immersion in sea water (marine piling, jetty cross-bracing, landing steps, retaining walls, etc.) H5 – High hazard: outside in contact with heavy wet soil or in fresh water (piling, substructure fr walkways and jetties, vineyards etc.) H4 – high hazard: outside in ground, subject to periodic wetting and leaching (fencing and structural posts, landscaping, stakes, pergolas, etc.) H3 – moderate hazard: outside above grounds, subject to periodic wetting and leaching (cladding, decking, stairs, balustrades, log homes, etc.). H2 – low hazard: inside above grounds, protected from wetting and leaching (roof trusses, framing, panelling, laminated beams, flooring, etc.

H6

Cross cut ends All machine, cutting or drilling of preservative treated timber should be done prior to preservative impregnation due to cross cutting etc., must be treated by liberally applying a suitable paint-on or brush-on remedial

H5

or supplemental preservatives (excluding ground contact).

H4

How to plant a pole The detail in these diagrams assists proper drainage of moisture that may be absorbed but a wooden pole. A structural engineer must be consulted for detailed structural requirements. Poles intended for planting in the ground must be purchased at required lengths, Never plant a cross-cut end of a treated pole or post into the ground as this will expose the untreated heartwood to fungal and termite attack resulting in premature failure.

H3

H2

LCP Roofing, leaders in roof truss technology, offer a complete roofing service, including design, manufacture, delivery and erection of roof trusses, as well as the supply and installation of roof tiles and roof sheeting. LCP Roofing also design, supply and erect composite floor joists as well as purpose-made plates for decorative exposed trusses. Managed by Andri Pretorius, Lyndsay Cotton and an energetic, dedicated staff complement, LCP Roofing’s mission is to become the preferred roofing company in Gauteng and to grow a sustainable business, all while flying the flag of the timber construction industry and bearing its own unique stamp of excellence.

→ one quickly finds areas on which to improve. This in turn helps to support the overall performance – and profitability – of the business. This is made even easier by IMD, who have been nothing short of professional and committed to helping us grow our business.” “Harnessing the power of the iStratgo performance management dashboard has proven critical in helping management at LCP Roofing view the company’s overall performance against goals and objectives in line with our strategy,” says Robertson. “Everything we do at LCP Roofing is with the ultimate goal of providing our staff with safe and secure employment, and growing a sustainable business by providing clients and shareholders with more than just a service, but excellence through added value,” he concludes. 

38

CONSTRUCTION WORLD FEBRUARY 2017