1. Raft foundation bottoms/ sides : 50-75mm
2. Strap Beam: 35mm
3. Slab:15mm
4. Column: 40 mm
5. Shear wall:25mm
6. Flat slab: 20mm
7. Stair case : 15 mm
8. Retaining wall: 20/25 mm on earth
9. Water retaining structure: 20/30 mm
Types of cover Block
1. Steel cover block
2. PVC block
3. Cement masonry
4. Aluminium cover
5. Stone