Question

In the limit state approach, the spacing of main reinforcement primarily controls

• A. Collapse
• B. Cracking
• C. Deflection
• D. Durability

Hint:

In RCC design:
• Bar spacing controls crack width.
• Effective depth mainly controls deflection.
• Concrete cover primarily improves durability.

Answer 1

The Correct Option is B

Concept: In the Limit State Method, proper spacing of reinforcement helps distribute tensile stresses uniformly and limits the width of cracks. Smaller spacing results in a larger number of fine cracks instead of a few wide cracks.

Step 1: State the purpose of reinforcement spacing. The spacing of main reinforcement influences \[ \boxed{\text{Crack width and crack distribution}.} \] Closer spacing provides better crack control.

Step 2: Identify the correct option. Since reinforcement spacing mainly controls cracking, \[ \boxed{\text{Spacing of main reinforcement primarily controls cracking}.} \] Therefore, the correct option is \[ \boxed{(B)\;\text{Cracking}.} \]