Carpenter Red Seal Exam Prep · Question
A client requests a vaulted ceiling with a 9:12 roof pitch. If the horizontal run from the exterior wall plate to the ridge is 3.6 metres (12 feet), what is the vertical rise from the top plate to the ridge line?
A 9:12 pitch means for every 12 units of run, there are 9 units of rise. So, Rise = (9/12) * Run. Rise = (9/12) * 3.6 m = 0.75 * 3.6 m = 2.7 metres.
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Question: A client requests a vaulted ceiling with a 9:12 roof pitch. If the horizontal run from the exterior wall plate to the ridge is 3.6 metres (12 feet), what is the vertical rise from the top plate to the ridge line?
Answer options: ✅ 2.7 metres
- 3.6 metres
- 2.4 metres
- 4.1 metres
Correct answer: 2.7 metres
Explanation: A 9:12 pitch means for every 12 units of run, there are 9 units of rise. So, Rise = (9/12) * Run. Rise = (9/12) * 3.6 m = 0.75 * 3.6 m = 2.7 metres.
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