Demystifying fire-retardant treated wood specifications
Construction Specifier
NOVEMBER 27, 2021
Impregnation refers to a technique for treating absorbent materials with chemicals. References. They should be included in the specification’s references section: • UL 723 (ASTM E84); • ASTM D3201; • ASTM D2898; and. ft) flame under controlled conditions of draft and temperature onto the surface of a 7.4-m wide specimen.
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