Core TradesQuestion 50 of 700
A simple gable roof covers a building 24 feet by 40 feet in plan. At a 6:12 pitch (slope factor 1.118), what is the approximate total roof surface area?
a.About 960 square feet
b.About 1,000 square feet
c.About 1,040 square feet
d.About 1,073 square feet
Explanation
The plan footprint is 24 x 40 = 960 sq ft; multiplying by the 6:12 slope factor of 1.118 gives about 1,073 sq ft of actual sloped roof area. Using 960 ignores the slope, and the middle values understate the correction.
Law Reference: 2025 CA Residential Code (CRC) Chapter 8 (Roof-Ceiling Construction)Practice all 700 questions free — no signup required.
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