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Reinforcement is required for reinforced concrete members such as footings, beams, columns, slabs, lintels etc. Estimation of reinforcement quantity is required prior to tendering stage to calculate approximate cost of project or construction work.
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Following table gives the estimated quantities of
reinforcement and its size generally used for various building works:
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Sl.
No
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RCC
Member
|
Quantity
in kg/m3
|
Size of reinforcement required
|
|
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1
|
Column footings
|
75
|
10mm
or 12mm
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2
|
Grade beams
|
100
|
12mm,
16mm - 85% Stirrups - 6mm or 8mm- 15%
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3
|
Plinth beams
|
125
|
8mm
diameter - 85%, Stirrups 6mm - 15%
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4
|
Columns
|
225
|
16mm,
20mm and 25mm - 90% Ties - 6mm or
8mm - 10%
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5
|
Lintel beam
|
125
|
12mm,
16mm dia - 85% Stirrups - 6 mm or 8mm - 15%
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6
|
Sunshades
|
60
|
8mm
dia - 75% Distributer - 6mm - 25%
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7
|
Canopy slab upto 2.0 m span
|
125
|
10mm
dia - 80% Distributor bars - 6mm or 8mm -20%
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8
|
Staircase waist slab
|
150
|
12
or 16mm dia - 80% Distributor 8mm dia - 15%
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9
|
Roof slab
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(a)
One way slab
|
80
|
8mm
dia - 70% Distributor - 6mm - 30%
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(b)
Two way slab
|
100
|
8mm
dia - 100%
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(c)
Square slab - 4m to 6m size
|
150
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10 -
12mm dia - 100%
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10
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Main beams above 6m
|
250
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20mm,
16mm, 12mm - 80 - 85% Stirrups - 8mm - 15 - 20%
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All above mentioned steel are round tapered
steel. This data is just for estimation of quantity of steel for various RCC
works. This does not provide actual steel required for all the members.
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Actual quantity of steel required can be
calculated from the drawings prepared after structural design.
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