Carpenter Red Seal Exam Prep · Question
A carpenter is constructing an open-riser staircase. What is the maximum allowable clear opening between consecutive treads, as specified by the National Building Code of Canada (NBC) 2020?
The NBC 2020, Article 9.8.7.5., states that where risers are open, the maximum allowable clear opening between consecutive treads shall not permit the passage o
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Question: A carpenter is constructing an open-riser staircase. What is the maximum allowable clear opening between consecutive treads, as specified by the National Building Code of Canada (NBC) 2020?
Answer options: ✅ 100 mm
- 125 mm
- 90 mm
- 150 mm
Correct answer: 100 mm
Explanation: The NBC 2020, Article 9.8.7.5., states that where risers are open, the maximum allowable clear opening between consecutive treads shall not permit the passage of a sphere 100 mm in diameter, preventing children from falling through.
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- When interpreting a foundation plan, a dashed line with 'P. WALL' typically represents which of the following?
- A site plan shows contour lines with an interval of 0.5 m. If two adjacent contour lines are labelled 124.0 m
- According to the National Building Code of Canada (NBC) 2020, what is the primary consideration for the requir
- Two offset stakes are driven at 2.0 m from the proposed edge of a concrete slab. The first stake is marked 'Cu
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