According to NRCS VC 9092, The Compulsory Specification for Preservative Treated Timber, any preservative treated timber product claiming to be preservative treated must be branded as specified in the relevant SANS product standards. An important part of the brand is the Hazard Class, which indicates the service conditions to which the product is exposed and the level of treatment or level of protection that must be applied to the wood. The Hazard Classes have been defined as follows…
Instructions on how to build your own carport using Tanalised pressure treated wood.
Timber Treatment & the Law In South Africa there are two regulations applicable to preservative-treated timber.
BUY ONLY CERTIFIED TREATED TIMBER POLES THAT CARRY THE CORRECT MARKINGS
REKA FELA DIKOTA TŠE DI ŠOMILWEGO TŠA GO NETEFATŠWA TŠEO DI NAGO LE MASWAO AO A NEPAGETŠEGO
THENGA KUPHELA AMAPHOLI EZINGODOAQINISEKISIWE FUTHI AQUKETHE IZIMPAWU EZIFANELE
KHA VHA RENGE BALAGA/THANDA DZO ?ODZWAHO MUSHONGA DZO MAKIWAHO/TALIWA NGONA
THENGA KUPHELA IIPALI ZAMAPLANGA EZIQINISEKISIWEYO EZINEEMPAWU EZICHANEKILEYO
An important consideration when building with timber is predicting how long the structure will last. Whilst insects, decay or rotting organisms and marine borers can all attack wood, some timber species have the ability to resist attack better than others. The natural durability of a species to resist attack by wood destroying organisms is an indication of how long that timber will last when it is exposed to a defined set of exposure conditions without any additional preservative protection. The natural durability of timber species varies, even so within the wood from the same species of tree, depending on whether its sapwood or heartwood.