Carpenter Red Seal Exam Prep · Question
What is the primary factor determining the concrete strength required before removing major structural formwork components like those supporting beams or suspended slabs?
The concrete must achieve sufficient strength to carry its own weight and any subsequent construction loads without excessive deflection or damage. This is typi
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Question: What is the primary factor determining the concrete strength required before removing major structural formwork components like those supporting beams or suspended slabs?
Answer options:
- The ambient air temperature during curing.
- The slump of the concrete mix at the time of pouring. ✅ The specified design strength at which the concrete can safely support its own weight and any imposed construction loads.
- The duration of vibration during placement.
Correct answer: The specified design strength at which the concrete can safely support its own weight and any imposed construction loads.
Explanation: The concrete must achieve sufficient strength to carry its own weight and any subsequent construction loads without excessive deflection or damage. This is typically verified through field-cured cylinder break tests and compared against the design engineer's specified stripping strength, as per CSA A23.1.
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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
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- 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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