scope:

This standard specifies a method for testing the serviceability of decking boards exposed outdoors, above ground, in a decking module closely resembling poorly ventilated decking in residential use. Since the experimental design is virtually identical, it may conveniently be run at the same time as AWPA E25 Standard Field Test for Evaluation of Wood Preservatives to be Used Above-Ground (UC3B) Decking Test. This test method is intended to be a commodity test.

The test method is suitable for evaluating the effects of, surface profiling, different wood protection systems, and additives such as dimensional stabilizers and UV protectant treatments on commercially treated species. In addition, the test method may also be used to compare different grain orientations and newly introduced wood species.