Durapine treated wood meets requirements of model building codes for many applications, and a code evaluation report has been issued. See ES Report for allowable values and/or conditions of use. Such reports are subject to re-examination, revisions, and possible closing of file. The preservative treatment is listed in the standards of the American Wood-Preservers’ Association and is suitable for above-ground and ground contact applications (Use Categories UC1, UC2, UC3, UC3B, UC4A, UC4B and UC4C). Internationally, it is approved by government and trade agencies throughout Europe and in Australia, New Zealand, and Japan.
Different applications may require different amounts of preservative protection. Below are the standards of the American Wood-Preservers’ Association for the copper azole formulations.
|Intended End Use||Copper|
lbs / cu ft
|Decking*||0.05||Sapwood species: decking|
|0.05||Decking, deck joints, railings,|
|Ground Contact or|
|0.14||Fence posts, structural lumber|
and timbers, guardrail posts,
utility poles in low decay regions
|Ground Contact or|
Fresh Water or
|0.23||Permanent wood foundations,|
sawn & round building poles,
utility poles in moderate
*Recommendation of building code report, not AWPA
Click here more info on µCA-C and retention comparisons with other preservatives.
Specification Guide for DuraPine Treated Wood
To see the table summarizing Cox treatments and corresponding retention levels for DuraPine and Wolmanized wood, click here.
Hot-dipped galvanized fasteners (meeting ASTM A 153) and connectors (ASTM A 653 Class G185 sheet), or better, are recommended for protection against moisture often present where treated wood is usually used. For Permanent Wood Foundations use 304 or 316 stainless steel. Aluminum should not be used in direct contact with this wood.For indoor applications, while galvanized fasteners are preferable, the use of non- galvanized nails or screws of sizes and types approved by the Model Code is acceptable when attaching joists, studs, or other framing to Wolmanized sill plate, provided the wood will remain dry in service, protected from weather and water. Likewise, the use of standard galvanized strapping, anchor plates, or mild steel anchor bolts ½” diameter and larger is acceptable for fastening Wolmanized wood to foundations, provided that the wood will remain dry in service, protected from the weather and water.Hardware Manufacturers
Manufacturer Recommendations: USP Connectors