. Scope 1.1 This test method is designed to determine the effect of exposure to high temperatures and humidities on the flexure properties of fire-retardant treated structural composite panels. In this test method, treated structural composite panels are exposed to a temperature of 77C (170F). 1.2 The purpose of the test method is to compare the flexural properties of fire-retardant treated structural composite panels relative to untreated structural composite panels. The results of tests conducted in accordance with this test method provide a reference point for estimating strength temperature relationships. This test method is intended to provide an accelerated test at elevated temperatures and controlled humidities of structural composite panels sheathing treated with the same chemical formulation(s) and processing conditions as structural composite panels used commercially. 1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
This standard may be helpful to producers of engineered wood composites when developing additives to protect from fire or enhance durability.
Composite; Engineered Wood composite; Treated Composite
The title and scope are in draft form and are under development within this ASTM Committee.
Citing ASTM Standards
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