In limit state approach, spacing of main reinforcement controls primarily
A
collapse
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B
cracking
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C
deflection
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D
durability
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Solution
The correct option is B cracking The code specifies minimum and maximum limits for the spacing between parallel reinforcing bars in a layer. The minimum limits are necessary to ensure that the concrete can be placed easily in between and around the bars during the placement of fresh concrete. The maximum limits are specified for bars in tension for the purpose of controlling crack-widths and improving bond.