Carpenter Red Seal Exam Prep · Question
A framing crew is installing a roof with a 6:12 pitch. The building has a total span of 10.0 metres. What is the theoretical rise of the roof from the top plates to the ridge?
A 6:12 pitch means for every 12 units of run, there are 6 units of rise. The total span is 10.0 metres, so the run from the wall to the ridge is half the span,
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Question: A framing crew is installing a roof with a 6:12 pitch. The building has a total span of 10.0 metres. What is the theoretical rise of the roof from the top plates to the ridge?
Answer options:
- 1.25 metres
- 2.50 metres ✅ 3.00 metres
- 5.00 metres
Correct answer: 3.00 metres
Explanation: A 6:12 pitch means for every 12 units of run, there are 6 units of rise. The total span is 10.0 metres, so the run from the wall to the ridge is half the span, which is 5.0 metres. With a 6:12 pitch, the rise is (6/12) * 5.0 metres = 0.5 * 5.0 metres = 2.50 metres.
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