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Q.
How do I know
that I am purchasing properly treated timber?
A.
To be certain that
that the timber is of a quality to meet its intended use,
follow simple guidelines when purchasing or specifying
treated timber:
Timber treated should conform to the approved treating
industry standards set out in Australian Standards and
supported by the TPAA and its members.
You will know that the timber conforms if it carries a
mark that is a set of numbers and a Hazard Class H number.
The H number will tell you where the treated timber may be
applied - above the ground or in the ground. The other
numbers relate to the preservative type and the treatment
plant where it was produced. The mark may also be
supplemented by a company logo.
An example of a typical mark (or brand) would be:
The first number is the treatment plant
number, the second identifies the preservative used and the
third, most important, tells you where the treated timber
may be used; in the example given the treated timber is fit
for use in ground contact.
Finally, always choose treated timber that is visibly
clean and free of surface residue.
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