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1. |
If the diameter of the main reinforcement in a slab is 16 mm, the concrete cover to main bars is%! |
A. | wh [(1 - sin φ)/(1 + sin φ)] |
B. | wh² [(1 - sin φ)/(1 + sin φ)] |
C. | wh² [(1 - sin φ)/2(1 + sin φ)] |
D. | wh² [(1 - sin φ)/3(1 + sin φ)] |
Answer» D. wh¬¨‚â§ [(1 - sin ≈ì√ú)/3(1 + sin ≈ì√ú)] | |