Construction World

CONSTRUCTION WORLD

SEPTEMBER

2017

Cross cut ends

All machine, cutting or drilling of

preservative treated timber should be done

prior to preservative impregnation due

to cross cutting etc. It must be treated

by liberally applying a suitable paint-on

or brush-on remedial or supplemental

preservatives (excluding ground contact).

How to plant a pole

Poles must have 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.



WOOD CONSTRUCTION

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 for 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.

Buying and using preservative treated timber?

In South Africa treated timber is

required by law 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.

The company’s success can be attributed to its focus of helping its

customers make stronger and safer structures. A customer oriented

focus along with a commitment to research and development of new

ways for construction has been critical in making Simpson Strong-

Tie synonymous with high quality construction solutions.

In the past Simpson Strong Tie within South Africa promoted

one of its popular tools, the Quik Drive

auto feed fastening system.

The Quik Drive

systems are ideal for a broad range of fastening

applications to increase productivity with quick-loading screw strips,

precise countersink adjustment, and a patented auto-advance

mechanism. This is designed to deliver speed and accuracy when

using screws for many applications.

Innovative timber fasteners in South Africa

For 60 years, Simpson Strong-Tie has been recognised

and an innovative manufacturer of high quality

construction products across a broad range of products

including connectors, fasteners, anchors and repair,

protect and strengthening systems.

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POLES (Metal marker)

SAWN TIMBER (Ink stamp)