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Per §10.3, the maximum nominal size of coarse aggregate shall not exceed which of the following limits?
A{'text': '1/4th the minimum thickness of the member', 'label': 'A'}
B{'text': 'Clear distance between main bars minus 5 mm', 'label': 'B'}
C{'text': 'All of the above conditions apply simultaneously', 'label': 'C'}
D{'text': 'Clear cover to reinforcement minus 5 mm', 'label': 'D'}
Answer & Solution
Correct answer: C. {'text': 'All of the above conditions apply simultaneously', 'label': 'C'}
1. §10.3 states all four caps: the maximum nominal aggregate size shall NOT exceed (i) 1/4th of the minimum thickness of the member; (ii) clear distance between main bars minus 5 mm; (iii) clear cover minus 5 mm; (iv) spacing between prestressing cables minus 5 mm.
2. All four conditions apply together — the lowest controls.
_Source: IGNOU ET-522 Block-3 Unit-10 Concrete Mix Design, §10.3, p. 7_
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