Useful Notes for Civil Engineer's

Useful Notes for Civil Engineer's
CONCRETE GRADE:
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.RET. WALL : 20/ 25 mm on earth
13.WATER RETAINING STRUCTURES : 20/30 mm:

DIA                                              WEIGHT PER METER
6mm                                                   0.222Kg
8mm                                                   0.395 Kg
10mm                                                  0.616 Kg
12mm                                                  0.888 Kg
16mm                                                  1.578 Kg
20mm                                                  2.466 Kg
25mm                                                  3.853 Kg
32mm                                                  6.313 Kg
40mm                                                  9.865 Kg

1bag cement-50kg
1feet-0.3048m
1m-3.28ft
1sq.m-10.76sq.ft
1cu.m-35.28cu.ft
1acre-43560sq.ft
1cent-435.6sq.ft
1hectare-2.47acre
1acre-100cent-446.724sq.m
1ground-2400sq.ft
1unit-100cu.ft-2.83cu.m 1square-100sq.ft

1 M LENGTH STEEL ROD I ITS VOLUME
V=(Pi/4)*Dia x DiaX L

=(3.14/4)x D x D X 1 (for

1m length) Density of Steel=7850 kg/ cub meter