Florida Building Code Practice Exam

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What is the total fire rating of a wood frame wall constructed with 2x4 studs and one layer of 5/8" type X gypsum wallboard on each side?

30 minutes
40 minutes
60 minutes
80 minutes

The correct answer is: 60 minutes

The total fire rating for a wood frame wall constructed with 2x4 studs and one layer of 5/8" Type X gypsum wallboard on each side is 60 minutes. This is due to the inherent fire resistance of Type X gypsum wallboard, which is specifically designed to withstand higher temperatures and prolong the combustion process. When installed properly, with the specified materials, each layer of 5/8" Type X gypsum contributes to the overall fire rating of the wall system. The combination of two layers of this specific type of gypsum helps achieve a significant fire resistance rating, allowing it to offer protection for up to one hour against fire exposure. This is consistent with many building codes, which recognize the efficiency of using Type X gypsum for creating fire-rated assemblies in wood frame structures.