If the RCC slab is of 100 mm thickness than the maximum size of reinforcement bar that can be provided is
- A8 mm
- B10 mm
- C12 mmCorrect
- D16 mm
Solution
Concept
Bar size limit in slabs
Formula
φ max ≤ D/8
Step-by-step solution
1. IS 456: bar diameter ≤ D/8 = 100/8 = 12.5 mm. 2. The largest standard size not exceeding 12.5 mm is 12 mm.
Explanation
The limit protects the bond and cover.
Why the other options are wrong
16 mm exceeds D/8.
Shortcut
D/8.
Correct answer: C) 12 mm