Carpenter Red Seal Exam Prep · Question
A falsework system for a 4.5 m high concrete wall features vertical shores. What is the minimum recommendation for the slenderness ratio (L/r) for compression members, such as these shores, to ensure stability, according to CSA S269.3 guidelines for falsework design?
CSA S269.3, Clause 9.6.1 states that the slenderness ratio (L/r) for timber compression members in falsework should not exceed 100, and for steel, it should not
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Question: A falsework system for a 4.5 m high concrete wall features vertical shores. What is the minimum recommendation for the slenderness ratio (L/r) for compression members, such as these shores, to ensure stability, according to CSA S269.3 guidelines for falsework design?
Answer options:
- Should not exceed 50. ✅ Should not exceed 100 for timber members.
- Should not exceed 200.
- Slenderness ratio is not a direct concern for vertical shores.
Correct answer: Should not exceed 100 for timber members.
Explanation: CSA S269.3, Clause 9.6.1 states that the slenderness ratio (L/r) for timber compression members in falsework should not exceed 100, and for steel, it should not exceed 200. This limit helps prevent buckling failures.
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