UL 10A-2009 pdf download.Tin-Clad Fire Doors. 3.6 The actual thickness of the boards shall be not less than 3/4 in (1 9.1 mm). 3.7 The boards shall not be less than 4 in (89 mm)
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UL 10A-2009 pdf download.Tin-Clad Fire Doors. 3.6 The actual thickness of the boards shall be not less than 3/4 in (1 9.1 mm). 3.7 The boards shall not be less than 4 in (89 mm)
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