UL 790:2018 pdf download.Standard Test Methods for Fire Tests of Roof Coverings. 4.3.2 The length of the test deck is to be: a)13 feet (3.9 m) for Class C tests, b) 9 feet (2.7 m) for Class B tests, and c) 8 feet (2.4 m) for Class A tests. 4
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