Useful Tips For Civil Engineers
1 Gunta = 121 Sq yards.
1 Gunta = 101.171 Sq Meter.
1 Gaj = 1 Yard
1 Yard = 36 inch
1 Yard = 3 feet
1 Yard = 0.9144 meter =
1 sq Yard = 0.83612 Sq meter.
1 sq Yard = 9 sq feet.
1 Sq yard = 1296 Sq inch.
1 Meter = 1.0936 Yards.
1 Meter = 39.370 inch.
1 Meter = 3.280 feet.
1 Sq meter = 1.1959 Sq yard.
1 Sq meter = 1550 Sq inch.
1 Sq Meter = 10.763 Sq feet.
1 feet = 0.304 meter.
1 feet = 0.333 yards.
1 feet =12 inch
1 Sq feet = 0.111 Sq Yard.
1 Sq feet = 0.09290 Sq Meter.
1 Sq feet = 144 Sq inch.
1 inch = 2.54 cm.
1 Inch = 0.0254 meter.
1 Inch = 0.0277 yards.
1 Inch = 0.0833 feet.
1 Sq Inch = 0.00064516 Sq Meter.
1 Sq Inch = 0.00077160 Sq Yards.
1 Sq Inch = 0.00694444 Sq feet.
1 Acre = 4046.86 Sq Meter.
1 Acre = 4840 Sq yards.
1 Acre = 43560 Sq feet.
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 the 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
What is D2/162.27 in steel?
weight of steel bar per meter = Volume of steel x Density of steel
Weight of steel bar per meter = πD2/4 x 1000 mm (for 1m lenght) x 7850 kg/ 1000 mm x 1000 mm x 1000 mm
Weight of steel bar per meter = 3.14D2/4 x 7850/1000 x 1000 = 0.785D2 x 0.00785
Weight of steel bar per meter = 0.0061622 x D2 = D2/1/0.0061622 = D2/162.27
Design mix:
M10 ( 1 : 3.92 : 5.62)
Cement : 210 Kg/ M 3
20 mm Jelly : 708 Kg/ M 3
12.5 mm Jelly : 472 Kg/ M 3
River sand : 823 Kg/ M 3
Total water : 185 Kg/ M 3
Fresh concrete density: 2398 Kg/M 3
M20 ( 1 : 2.48 : 3.55)
Cement : 320 Kg/ M 3
20 mm Jelly : 683 Kg/ M 3
12.5 mm Jelly : 455 Kg/ M 3
River sand : 794 Kg/ M 3
Total water : 176 Kg/ M 3
Admixture : 0.7%
Fresh concrete density: 2430 Kg/ M 3
M25 ( 1 : 2.28 : 3.27)
Cement : 340 Kg/ M 3
20 mm Jelly : 667 Kg/ M 3
12.5 mm Jelly : 445 Kg/ M 3
River sand : 775 Kg/ M 3
Total water : 185 Kg/ M 3
Admixture : 0.6%
Fresh concrete density: 2414 Kg/ M 3
Note: sand 775 + 2% moisture, Water185 -20.5 =
164 Liters, Admixture = 0.5% is 100ml
M30 ( 1 : 2 : 2.87)
Cement : 380 Kg/ M 3
20 mm Jelly : 654 Kg/ M 3
12.5 mm Jelly : 436 Kg/ M 3
River sand : 760 Kg/ M 3
Total water : 187 Kg/ M 3
Admixture : 0.7%
Fresh concrete density: 2420 Kg/ M 3
Note: Sand = 760 Kg with 2% moisture
(170.80+15.20)
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
01. PCC 1:5:10 1440/5*0.45 129.60Kg 2.59
02. PCC 1:4:8(M 7.5) 1440/4*0.45 162.00Kg 3.24
03. PCC 1:2:4(M 15) 1440/2*0.45 324.00Kg 6.48
04. PCC 1:3:6(M 10) 1440/3*0.45 216.00Kg 4.32
05. RCC 1:2:4(M 15) 144/2*0.45 324.00Kg 6.48
06. RCC 1:1.5:3(M 20) 1440/1.5*0.45 32.00Kg 8.64
07. RCC 1:1:2(M25) 370.00Kg 7.40
08. RCC M 30 410.00Kg 8.20
09. RCC M35 445.00Kg 8.90
10. RCC M40 480.00Kg 9.60
11. Damp Proof Course CM 1:3,20mm tk 1440/3*0.022 10.56Kg 0.21
12. 2″tk precast slab M15 324*0.05 16.20Kg 0.32
13. 3″tk precast slab M15 324*0.075 24.30Kg 0.49
14. GC Masonry CM 1:7 1440/7*0.34 70.00Kg1.40
15. Brick Work CM 1:6 1440/6*0.25 60.00Kg 1.20
16. Brick Work CM 1:4, 115tk 1440/4*0.25*0.115 10.35Kg 0.21
17. Grano Flooring CC 1:1.5:3 1440/1.5*0.45*0.05 21.60Kg 0.43
18. Plastering CM 1:3, 12mm tk 1440/3*0.014 6.72Kg 0.13
19. Wall Plastering CM 1:4, 12mm tk 1440/4*0.014 5.00Kg 0.10
20. Laying Pressed Tiles Over
a CM 1:4, 20mm tk 1440/4*0.022 7.92Kg 0.16
01. Any Concrete Work
(PCC, RCC) 0.45*35.315= 20.00
02. Damp Proof Course
CM `1:3, 20mm tk 1.00
03. 2″tk Precast slab M15 1.00
04. 3″tk Precast slab M15 1.50
05. SS Masonry in CM 1:7 15.00
06. Brick Work in CM 1:6 15.00
07. Brick Work in CM 1:4,115mm tk 2.00
08. Grano Flooring in CC 1:1.5:3 1.00
09. Plastering in CM 1:3, 12mm tk 1.00
10. Wall Plastering CM 1:4, 12mm tk 1.00
11. Laying Pressed Tiles over a CM 1:4, 20mm tk
1.00
12. Ceramic Tiles, Marble, Granite, Cuddapah slab
CM 1:4, 20mm tk 1.00
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