Bar bending schedule for footing
Ø Lets we discus about the bar bending of the
footing.
The main aim is for
bar bending of the beam to find out the how much of quantity (weight) of steel
required for footings, for our required structure.
Initially we find
quantity of steel for one footing then after it multiplying number of footings
in the structure.
Ø The bellow figures show the plan, elevation,
dimensions, and sectional view of the footing.
Required data:
Length of the footing = 2000mm
Breadth of the footing = 1500mm
Depth of the footing = 300mm
Dia of main bar = 25mm
Dia of distribution bar = 25mm
Clear cover for bottom of the footing = 75mm
CC for sides & top of the footing = 50mm
Cutting length of the main bar:
Length = (length of footing - 2×clear cover
at two sides) + 2(depth of footing – cc at top – cc at bottom) – deduction
bending
= (2000 - 2×50) + 2 ( 300 – 50 – 75 ) - 2×d
= (1900 + 2 × (175) - 2 × ( 25 )
= 1900 + 350 – 50
=2200mm
= 2.200m
No of main bars:
=(length/spacing)+ 1
=(1500/150)+1
=10+1 nos
=11 nos
Cutting length of distribution bar:
Length = (length of footing - 2×clear cover
at two sides) + 2(depth of footing – cc at top – cc at bottom) – deduction
bending
= (1500- 2×50) + 2 ( 300 – 50 – 75 ) - 2×d
=1400 + 350-100
=1650mm
=1.650m
No of main bars:
=(length/spacing)+ 1
=(2000/150)+1
=13.33+1
=14.33 nos
=14nos
Tabular form:
S no
|
Description
|
Dia
|
Length
|
No
|
Total length
|
Weight
|
1
|
Main bar
|
25mm
|
2.200m
|
11
|
24.2m
|
93kg
|
2
|
Distribution bar
|
25mm
|
1.650m
|
14
|
23.1m
|
89.1kg
|
Total weight =
93+89
= 182kg
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