Minimum Cover For Reinforcement in Cast-In-Place Concrete:
The clear cover is the distance between the outer surface of concrete to the nearest surface of reinforcing bar.
Clear cover varies in different conditions. The clear cover for cast-in-place concrete is given in the below table.
|Sl. No.||Conditions||Minimum cover (inches)|
|1||Concrete cast against and permanently exposed to earth||3|
|2||Concrete exposed to weather or earth||No. 6 to no. 18 bar||2|
|No. 5 bar, W31 or D31 wire|
|3||Concrete unexposed to weather or in contact with the ground.||Slabs, Walls, and Joist||No. 14 and no. 18 bar||1 ½|
|No. 11 bar and smaller||¾|
|Beams and columns||Primary reinforcement, ties, stirrups, and spirals||1 ½|
|Shells and folded plate members.||No. 6 bar and large bars.||¾|
|No. 5 bar, W31 or D31 wire and smaller.||½|
|4||Concrete tilt-up panels cast against a rigid horizontal surface, like concrete slab.||No. 8 bar and smaller.||1|
|No. 9 to no. 18 bar.||2|