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Question
In limit state approach, spacing of main reinforcement controls primarily _____.
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A.
Collapse
B.
Durability
C.
Deflection
D.
Cracking
Answer ( Option D)

Cracking

Solution

In limit state approach, spacing of the main reinforcement primarily controls, cracking width within permissible limit under normal exposure condition.
Note:
• Durability of member is ensured by cover requirements, grade of materials etc.
• Deflection of the member is ensured by taking span/depth ratio within allowable limits.
• Where the depth of beam exceed 750 mm side reinforcement are provided on two face to control crack width. These reinforcement are 0.1% of the gross area equally distributed on both faces.

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