Useful Information of Civil Engineering
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Grades of Concrete:
GRADE OF CONCRETE 
MIX RATIO (C:S:A) 
M5 
1:4:8 
M10 
1:3:6 
M15 
1:2:4 
M20 
1:1.5:3 
M25 
1:1:2 
Unit Weight of Civil Engineering Materials:
MATERIALS 
UNIT WEIGHT (KG/M3) 
Cement 
1440 Kg/m3 
P.C.C 
2400 Kg/m3 
R.C.C 
2500 Kg/m3 
Cement Plaster 
2000 Kg/m3 
Bitumen 
1340 Kg/m3 
Glass 
2500 Kg/m3 
Water 
1000 Kg/m3 
Standard Conversion Factors:
1 meter 
3.28 feet 
1 meter 
39.37 inches 
1 meter 
100 centimeter 
1 meter 
1000 millimeter 
1 foot 
12 inches 
1 inch 
2.54 centimeter 
1 inch 
8 soot 
Standard Cover for Different R.C.C Structures:
STRUCTURE 
STANDARD COVER 
Foundation 
75 millimeter 
Raft Foundation 
Top â€“ 50 millimeter Bottom & Sides â€“ 75 millimeter 
Strap Beam 
50 millimeter 
Beam 
25 millimeter 
Column 
40 millimeter 
Flat Slab 
20 millimeter 
Slab 
15 millimeter 
Unit Weight of Steel Per Meter:
DIAMETER OF STEEL 
WEIGHT (KG/M) 
6 mm 
0.222 Kg/m 
8 mm 
0.395 Kg/m 
10 mm 
0.660 Kg/m 
12 mm 
0.888 Kg/m 
16 mm 
1.578 Kg/m 
20 mm 
2.466 Kg/m 
25 mm 
3.853 Kg/m 
Basic Area Unit:
AREA UNIT 
SQFT/M 
1 Kanal 
20 Marla 
1 Marla 
272.24 Sqft 
1 Kanal 
502 Meter Sqm 
1 Marla 
25.10 Sqm 
1 Hectare 
1000 Sqm 
1 Acre 
43560 Sqft 
Grades of OPC:
OPC (Ordinary Portland Cement) 

33 Grade 
33 N/mm2 
43 Grade 
43 N/mm2 
53 Grade 
53 N/mm2 
Setting Time of Cement:
TYPE OF CEMENT 
INITIAL SETTING TIME 
FINAL SETTING TIME 
OPC (Ordinary Portland Cement) 
30 Min 
600 Min 
Portland Blast Furnace Cement 
30 Min 
600 Min 
RHC (Rapid Hardening Cement) 
30 Min 
600 Min 
LDC (Low Heat Cement 
60 Min 
600 Min 
Water Absorption of Bricks:Â
1^{st} Class Brick 
15% by dry weight 
2^{nd} Class Brick 
20% by dry weight 
3^{rd} Class Brick 
22% by dry weight 
[…] Useful Information on Civil Engineering […]
Denver Morales
Paloma Simpson
nkosi rossvaer