Commercially grown timber( sawn & round) in South Africa is primarily of Eucalyptus and Pinus species of non-durable varieties( sapwood & heartwood), and susceptible to biological attack by fungal decay and wood destroying insects. To ensure a long service life it’ s necessary to treat the timber with wood preservatives.
Timber is placed in a pressure vessel and put through vacuum and pressure cycles that allows absorption of the chemicals into the treatable sapwood of the timber and that the penetration and retention of the chosen hazard class is achieved.
TREATED TIMBER SHALL BEAR MARKINGS CONTAINING THE FOLLOWING MINIMUM INFORMATION
� Treatment plant identification( ABCTT)
� Certification mark( SABS / SATAS / ACT)
� SANS Standard Number( e. g 457 / 1288)
� Exposure / Hazard class( e. g H4)
� Year of treatment( 10 depicting 2010)
CHOOSE THE CORRECT PRESERVATIVE TREATED TIMBER FOR YOUR END APPLICATION( H classes)
H2 – Low Hazard: Inside above ground H3 – Moderate Hazard: Outside above ground H4 – High Hazard: In ground contact
H5 – High Hazard: In contact with heavy wet soil or in fresh water H6 – High Hazard: Prolonged immersion in marine waters
H2 H3 H4 H5 H6
FOR MORE INFORMATION ON ANY ASPECT RELATED TO TREATED TIMBER PRODUCTS AND THE CORRECT USE OF TREATED TIMBER OR WHERE TO CONTACT SAWPA MEMBERS, PLEASE CONTACT:
Tel: 011 974 1061 / 078 144 6213 admin @ sawpa. co. za www. sawpa. co. za