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A 2/12 pitch x 12.3 ft would be 24.6 inches of rise. A 3/12 would be 36.9 inches of rise. 2.33 feet = 27 inches. So you are between a 2 and 3 pitch.

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Q: A roof rises 2.4 feet vertically and 12.3 feet horizontally What is the grade of the roof?
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