Basic Topic for civil Engineer

• STANDARD CONVERSION FACTORS
• INCH = 25.4 MILLIMETRE
• FOOT = 0.3048 METRE
• YARD = 0.9144 METRE
• MILE = 1.6093 KILOMETER
• ACRE = 0.4047 HECTARE
• POUND = 0.4536 KILOGRAM
• DEGREE FARENHEIT X 5/9 – 32 = DEGREE
• CELSIUS
• MILLIMETRE= 0.0394 INCH
• METRE = 3.2808FOOT
• METRE = 1.0936YARD

• MATERIAL CALCULATION:
• CEMENT IN BAGS
• . PCC 1:5:10 1440/5*0.45 129.60Kg 2.59
• . PCC 1:4:8(M 7.5) 1440/4*0.45 162.00Kg 3.24
• . PCC 1:2:4(M 15) 1440/2*0.45 324.00Kg 6.48
• . PCC 1:3:6(M 10) 1440/3*0.45 216.00Kg 4.32
• . RCC 1:2:4(M 15) 144/2*0.45 324.00Kg 6.48
• . RCC 1:1.5:3(M 20) 1440/1.5*0.45 32.00Kg 8.64
• . RCC 1:1:2(M 25) 370.00Kg 7.40
• . RCC M 30 410.00Kg 8.20
• . RCC M35 445.00Kg 8.90
• . RCC M40 480.00Kg 9.60
• . Damp Proof Course CM 1:3,20mm tk 1440/3*0.022 10.56Kg 0.21
• . 2″tk precast slab M15 324*0.05 16.20Kg 0.32
• . 3″tk precast slab M15 324*0.075 24.30Kg 0.49
• . GC Masonry CM 1:7 1440/7*0.34 70.00Kg1.40
• Brick Work CM 1:6 1440/6*0.25 60.00Kg 1.20
• . Brick Work CM 1:4, 115tk 1440/4*0.25*0.115 10.35Kg 0.21
• . Grano Flooring CC 1:1.5:3 1440/1.5*0.45*0.05 21.60Kg 0.43
• . Plastering CM 1:3, 12mm tk 1440/3*0.014 6.72Kg 0.13
• . Wall Plastering CM 1:4, 12mm tk 1440/4*0.014 5.00Kg 0.10
• . Laying Pressed Tiles Over
• CM 1:4, 20mm tk 1440/4*0.022 7.92Kg 0.16

• UNIT WEIGHT:
• . Concrete 25 kN/m3
• . Brick 19 kN/m3
• . Steel 7850 Kg/m3
• . Water 1000 Lt/m3
• . Cement 1440 Kg/m3
• . 1Gallon 3.78 Litres
• Link 8″ = 200mm
• . 1 Hectare 2.471 acr(10000m2)
• . 1 Acr 4046.82m2 = 100 cent

• DEVELOPMENT LENGTH:
• . Compression 38d
• . Tension 47 & 60d
• 1 Cent 435.60 Sft
• . 1 Meter 3.2808 ft
• . 1 M2 10.76 ft2
• . 1 Feet 0.3048m
• . 1 KN 100Kg
• . 1kN 1000N
• . 1 Ton 1000Kg = 10,000 N = 10 kN
• . 1 kG 9.81N

CONCRETE GRADES:
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

• WEIGHT OF ROD PER METER LENGTH:
• 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.f t
• 1cu.m-35.28cu.ft
• 1acre-43560sq.ft
• 1hectare-2.47acre