Carpenter Red Seal Exam Prep · Question
What is the typical maximum height of a wood-frame exterior wall that permits the use of 38x140 mm (2x6) studs spaced at 600 mm on centre in accordance with the National Building Code of Canada, assuming it supports a maximum of one storey and a roof?
According to NBC framing tables, 38x140 mm studs at 600 mm o.c. supporting one floor and a roof have a maximum permissible height of approximately 3.6 metres, a
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Question: What is the typical maximum height of a wood-frame exterior wall that permits the use of 38x140 mm (2x6) studs spaced at 600 mm on centre in accordance with the National Building Code of Canada, assuming it supports a maximum of one storey and a roof?
Answer options:
- 2.7 metres
- 3.0 metres ✅ 3.6 metres
- 4.2 metres
Correct answer: 3.6 metres
Explanation: According to NBC framing tables, 38x140 mm studs at 600 mm o.c. supporting one floor and a roof have a maximum permissible height of approximately 3.6 metres, assuming standard conditions and bracing. Taller walls would require larger studs or closer spacing.
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