Minimum Cover For Reinforcement in Cast-In-Place Concrete

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
and smaller
1 ½
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
Also Read- Development Length & Lap Length Of Bars.
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