Waffle (ribbed two-way) slabs are used to:
Choose the correct answer
Improve resistance to punching shear at columns only
Reduce self-weight while maintaining structural depth, enabling longer spans economically
Provide thermal insulation
Replace RC with only steel ribs
Correct Answer
B. Reduce self-weight while maintaining structural depth, enabling longer spans economically
AI Detailed Explanation & IS Code Reference
Unlock the reasoning, formula path and code-linked notes inside your student dashboard.
Waffle slab: two-way ribbed slab with rectangular coffers (voids) formed by ribs in both directions. Reduces dead weight (concrete removed from tension zone) while maintaining depth for stiffness. Efficient for large spans (8–15 m). Used in: car parks, office buildings, flat slab alternatives for longer spans. IS 456 Cl. 23.3 covers flanged sections.
ScoreCardAI links this solution with subject, topic and difficulty signals so your scorecard can identify weak areas after a full mock test.
Practice more Civil Engineering questions
This MCQ belongs to JE Level Premium Test Series. Full tests include timed attempts, rank comparison and subject-wise analysis.