Spacing change because dia not avaiable on site( In Slab )
Dia Available(Steel Area)(# 5)
Dia not Available ( Steel Area)(# 4)
# 4 bars , 6 " oc total steel area in 1 ft width
# 5 bars , 6 " oc total steel area in 1 ft width
Spacing Required for dia available on site(#5)
Dia Available(Steel Area)(16 mm)
Dia not Available ( Steel Area)(12 mm)
12 mm bars , 150 mm oc total steel area in 1 ft width
16 mm bars , 150 mm oc total steel area in 1 ft width
* Spacing Required for dia available on site(16mm)
* (300 mm * Cross Sectional Area of steel Available)
Spacing =
# Area of steel in 300 mm strip( which is not available on site)
# Area of steel in 300
mm strip = ( 300 mm * Cross sectional Area of steel which is not available on site but
mentioned in drawing)
Spacing of steel Mentioned in drawing
(n2/24)
Dia of steel Nomonal Nomonal
Imperial Bar Diameter(i Nominal Diameter( Nominal Weight
Size n) Area(in2) mm) Area(mm2) (kg/m)
#3 0.3750 0.11 9.5250 71 0.561
#4 0.5000 0.20 12.700 129 0.888
#5 0.6250 0.31 15.875 200 1.556
0.31 in2 #6 0.7500 0.44 19.050 284 2.240
0.2 in2 #7 0.8750 0.60 22.225 387 3.049
0.4 in2 #8 1.0000 0.79 25.400 509 3.982
0.62 in2 #9 1.1280 1.00 28.650 645 5.071
# 10 1.2700 1.27 32.260 819 6.418
9.3 in # 11 1.4100 1.56 35.810 1006 7.924
# 12 1.5000 1.76 38.100 1140 9.619
# 14 1.6930 2.25 43.000 1452 11.410
200 mm2 # 18 2.2570 4.00 57.330 2581 20.284
129 mm2
258 mm2
400 mm2
232.6 mm
Cross mm2
12 mm dia Sectional
Area of Bar 126.6
bar
14 mm dia
Spacing 124
bar Cross 153.9
Sectional
Area of Bar
Cross 308
Sectional
area
Weight Wt of Rebars
(Ib/ft) Dia(mm) Length(mm) Density(kg/m3) Wt(Kg/m) Wt(Ib/m)
0.3760 6 1000 7860 0.22 0.50
0.6680 7 1000 7860 0.30 0.68
1.0430 8 1000 7860 0.39 0.88
1.5020 9 1000 7860 0.50 1.12
2.0440 10 1000 7860 0.62 1.38
2.6700 11 1000 7860 0.75 1.67
3.4000 12 1000 7860 0.89 1.99
4.3030 13 1000 7860 1.04 2.34
5.3130 14 1000 7860 1.21 2.71
6.4240 15 1000 7860 1.39 3.11
7.6500 16 1000 7860 1.58 3.54
13.6000 17 1000 7860 1.78 3.99
18 1000 7860 2.00 4.48
19 1000 7860 2.23 4.99
20 1000 7860 2.47 5.53
21 1000 7860 2.72 6.10
22 1000 7860 2.99 6.69
23 1000 7860 3.26 7.31
24 1000 7860 3.55 7.96
25 1000 7860 3.86 8.64
Slab Dimension
Spacing
Sno Description Dia of Bar Length Breadth Nos Length
of bar
1 shorter bars #4 3.5 1.2 6.7 0.15 1.35
2 Longer bars #4 3.5 1.2 2.1 0.15 3.65
3 shorter bars #5 3.5 1.2 6.7 0.15 1.35
4 Longer bars #5 3.5 1.2 2.1 0.15 3.65
Area wise steel
Steel Area Required 6" c/c 12" strip(# 5) 0.62
Steel Area Placed 6" c/c 12" strip(# 4) 0.4
steel spacing Required 12" strip (# 4) 3.9
Length
Spacing Toal Weight
Description Dia of Bar of one
of bar Length (kg/m)
bar Total
As per drawing steel required 16 mm 1 1 1
Actual steel placed onsite 12 mm
No of bars of
No of barsof No of bars Extra No of bars Extra
required in
required in required in short required in Long
short
Toal Weight Toatal Long direction direction in top(# direction in top(#
direction in
Length (kg/m) Weight(kg) in top 4) 4)
top
60.3 0.888 53.55
51.1 0.888 45.38
22.33 7.00 16.80 5.27
60.3 1.556 93.83
51.1 1.556 79.51
For top & For top & For top &
For top & Bottom
Bottom Bottom Bottom
44.67 14.00 33.60 10.53
Toatal
Weight
(kg)
