Question

A reinforced concrete slab is 75 mm thick. The maximum size of reinforcement bar that can be used is

• A. 6 mm diameter
• B. 8 mm diameter
• C. 10 mm diameter
• D. 12 mm diameter

Answer 1

The correct option is B 8 mm diameter

(b)
The Code limits the maximum diameter of reinforcing bars in slabs to one-eight of the total thickness of the slab, and the maximum spacing of such main bars to 3d or 300 mm (whichever is less).