Carpenter Red Seal Exam Prep · Question
A carpenter is framing a roof with a 4:12 pitch. The building's width is 9.6 metres. What is the rise of the roof from the top plate to the ridge beam?
The run is half the building width, so 9.6 m / 2 = 4.8 m. For a 4:12 pitch, the rise is (4/12) multiplied by the run. Rise = (4/12) * 4.8 m = (1/3) * 4.8 m = 1.
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Question: A carpenter is framing a roof with a 4:12 pitch. The building's width is 9.6 metres. What is the rise of the roof from the top plate to the ridge beam?
Answer options: ✅ 1.6 metres
- 2.4 metres
- 3.2 metres
- 1.2 metres
Correct answer: 1.6 metres
Explanation: The run is half the building width, so 9.6 m / 2 = 4.8 m. For a 4:12 pitch, the rise is (4/12) multiplied by the run. Rise = (4/12) * 4.8 m = (1/3) * 4.8 m = 1.6 metres.
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