Design of Slabs MCQ with answer and solution

Concept

Main Reinforcement in One-Way Slabs

Formula

N/A

Step-by-step solution

1. Identify the structural behavior of a one-way slab, noting that maximum bending occurs along the shorter span due to greater stiffness. 2. Recall that main reinforcement must be provided along the direction of maximum bending to resist tensile stresses. 3. Compare with the given options and select Option (a) as the correct choice.

Explanation

In a one-way slab, bending primarily occurs along the shorter span because it is stiffer and experiences higher bending moment. Therefore, the main reinforcement is placed along the shorter span to resist bending, while distribution steel is provided along the longer span.

Shortcut

To remember main reinforcement in a one-way slab, use the rule "Short Span = Main Steel": - Main Reinforcement: Placed along the SHORTER span where maximum bending occurs. - Distribution Steel: Placed along the LONGER span to handle temperature and shrinkage stresses.

Common mistake

A common mistake is selecting Option B by confusing the load distribution path and assuming the longer span carries the primary load. Another frequent error is selecting Option C by confusing a one-way slab with a two-way slab, in which main reinforcement is provided along both directions.