Basics Of Civil Engineering
■ CONCRETE GRADE
M5 1:4:8
M10= 1:3:6
M15- 1:2:4
M20= 1:1.5:3
M25= 1:1:2
Beams upto 6m: 14 days
Beams above 6m: 21 days
Slabs upto 4.5m: 7 days
Slabs above 4.5m: 14 days
M5 1:4:8
M10= 1:3:6
M15- 1:2:4
M20= 1:1.5:3
M25= 1:1:2
■ CLEAR COVER TO 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
7.SHEAR WALL: 25 mm
8.BEAMS 25 mm
9.SLABS: 15 mm
10.FLAT SLAB: 20 mm
11.STAIRCASE: 15 mm
12.WATER RETAINING STRUCTURES: 20/30 mm
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
7.SHEAR WALL: 25 mm
8.BEAMS 25 mm
9.SLABS: 15 mm
10.FLAT SLAB: 20 mm
11.STAIRCASE: 15 mm
12.WATER RETAINING STRUCTURES: 20/30 mm
■ Time required For Formwork Removal:
Columns: 24 hrs
Columns: 24 hrs
Beams upto 6m: 14 days
Beams above 6m: 21 days
Slabs upto 4.5m: 7 days
Slabs above 4.5m: 14 days
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