Clear Cover for Main Reinforcement

Following is a quick reference to the requirements of clear cover for main reinforcement.

1. Footings : 50 mm.
2. Raft foundation top : 50 mm.
3. Raft foundation bottom/sides : 75 mm.
4. Strap beam : 50 mm
5. Grade Slab : 20 mm
6. Column : 40 mm (d > 12 mm) 25 mm (d = 12 mm)
7. Sear wall : 25 mm
8. Slabs : 15 mm or not less than diameter of the bar.
9. Flat Slab : 20 mm
10. Staircase : 15 mm
11. Retaining wall on earth : 20 / 25 mm
12. Water retaining structures : 20 / 30 mm
13. Sunshade (Chajja) : 25 mm
14. Hook for stirrups in 9D for one side.
15. Number of stirrups = (clear Span/ Spanning) + 1
16. For cantilever anchorage, length of main steel is 69D.