When calculating concrete volume for a residential foundation in California, a contractor orders 15 cubic yards for a foundation requiring 14.2 cubic yards. What is the minimum additional percentage that CBC recommends for waste allowance?
Correct Answer
A) 5%
While CBC doesn't specify exact waste percentages, California construction standards and ACI 301 recommend a minimum 5% waste allowance for concrete placement. The contractor's 5.6% allowance (0.8/14.2) meets this standard, accounting for spillage, over-excavation, and placement variations common in California construction.
Why This Is the Correct Answer
While CBC doesn't specify exact waste percentages, California construction standards and ACI 301 recommend a minimum 5% waste allowance for concrete placement. The contractor's 5.6% allowance (0.8/14.2) meets this standard, accounting for spillage, over-excavation, and placement variations common in California construction.
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