Bar Bending Schedule For Combined Footing With Four Column
What is the combined footing?
when we make the combined footing then the soil capacity is a low and small distance between two-column.
In this article, we will calculate the bar bending schedule for that footing has four-column and we will find the complete detail of the rebar step by step.
we have some given data
dia of footing main bar =12mm
dia of footing distribution bar =12mm
spacing of footing=200mm
concrete cover of footing=75mm
dia of vertical bar in column=16mm
dia of strips =10mm
spacing of column=150mm
concrete cover of column=50mm
Now we calculate the cutting length of the main bar
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cutting length of main bar=total length of footing-2c.c+2bends
cutting length of main bar=2000-2(75)+2(350)
cutting length of main bar=2000-150+700=2450=2.550m
Nos of main bar=total length/spacing+1
Nos of main bar=2000/200+1=11nos
total length of the main bar =length of one bar × nos of main bar
total length of the main bar =2.550×11=28.05m
weight of main bar= d²/162.25×total length
weight of main bar=12²/162.25×28.05=24.89kg=25kg
length of distribution bar=length of the main bar
28.05=28.05m
the total length of the main bar and distribution bat=56.10m
wight also same
25kg=25kg
total weight of 12mm bar for footing =50kg
the vertical bar of column
cutting length of vertical bar=total height of footing and column-bottom c.c -2dia of the bottom bar -top c.c +bottom bends+top bends
cutting length of vertical bar=2000-75-2(12)-50+288+160
cutting length of vertical bar=2000-149+448=2299=2.299m
nos of bar=8
total length of vertical bar =length of one bar ×nos of bar
the total length of vertical bar = 2.299×8=18.392m
weight of vertical bar=d²/162.25×total length
weight of vertical bar=16²/162.25×18.392=29.01kg=29kg
we have four column
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so
length of one column ×4=18.392×4=73.568m
weight of one column×4=29×4=56kg
Stips of column
nos of strips(Rectangle) =total height of column/spacing+1
nos of strips (rectangle)= 1500+150+1=11nos
cutting length of strips (Rectangle)=2side of 350+2side of 250+2bends (9d)
cutting length of strips (Rectangle)= 700+500+2(90)=1.380m
total length of strips=length of one stips×nos of strips
total length of strips=1.380×11=15.18m
weight of strips (Rectangle)=d²/162.25×total length
weight of strips (Rectangle)=10²/162.25×15.18=9.356kg=10kg
we have four column
so
length of one column ×4=60.72m
weight of one column×4=40kg
Now calculate the diagonal stips
length of strips =4sides of in diagonal +2bends(9d))
length of strips =4×215+2(9×10)=860+180=1040=1.040m
nos of strips =total height/spacing+1=1500/150+1=11nos
total length of strips=length of one strips ×nos of strips
total length of strips=1.040×11=11.44m
weight of stips =d²/162.25×total length=10²/162.25×11.44=7.05kg= 7kg
we have four column
length of one column stips×4=11.44×4=45.76m
weight of one column strips ×4=7×4=28kg
Now
total length of 12mm bar =56.10m
total weight of 12mm bar =50kg
total length of 16mm bar=73.56m
total weight of 16mm bar =56kg
total length of 10mm bar =68kg
total weight of 10mm bar =110kg
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