guide to the specification, installation and use of preservative treated ...
guide to the specification, installation and use of preservative treated ...
guide to the specification, installation and use of preservative treated ...
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GUIDE TO THE SPECIFICATION, INSTALLATION<br />
AND USE OF PRESERVATIVE TREATED<br />
ENGINEERED WOOD PRODUCTS<br />
Preservative penetration <strong>of</strong> all sapwood Glulam laminates before fabrication is required as well as 5<br />
mm from <strong>the</strong> face or edge <strong>of</strong> non-termite resistant<br />
heartwood laminates, when <strong>the</strong> lesser crosssection<br />
dimension is 35<br />
mm. Unpenetrated heartwood is permitted with<br />
some restrictions on its distribution within individual<br />
laminates.<br />
Where <strong>the</strong> Glulam is <strong>treated</strong> after fabrication <strong>the</strong><br />
<strong>preservative</strong> must penetrate all exposed sapwood<br />
(i.e. sapwood on adjacent exposed surfaces <strong>and</strong><br />
not enclosed by heartwood) <strong>and</strong>, if termite resistant<br />
heartwood is present, all unexposed sapwood<br />
within 5 mm <strong>of</strong> <strong>the</strong> faces or edges (8 mm if <strong>the</strong><br />
cross-section is >35 mm), or it can remain<br />
un<strong>treated</strong> if it comprises 35 mm).<br />
Unpenetrated heartwood <strong>and</strong> unpenetrated unexposed sapwood is allowed if, <strong>to</strong>ge<strong>the</strong>r, <strong>the</strong>y comprise<br />
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