Steel Quantity Calculation Formula = (total length – clear cover)/center to center spacing + 1 main bar, = (5000 – (25+25))/100 + 1, = 4950 divided by 100 + 1, = 51 bars., distribution bar = (2000 – (25+25))/125 + 1, = 1950 divided by 125 + 1, = 17 bars.

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#### How to calculate the weight of steel?

Steel Quantity Calculation – (Cutting length) main bar: formula = (l) + (2 x ld) + (1 x 0.42d) – (2 x 1d), where l = clear span of the slab, ld = development length which is 40 d (where d is diameter of bar), 0.42d = inclined length (bend length), 1d = 45° bends (d is diameter of bar) first calculate the length of “d”. : How to Calculate Slab Steel Quantity from Drawing | BBS of Slab

### How to calculate steel for footing?

Calculate Steel for Footing – Size of footing and its reinforcement details (bar size and spacing) shall be known. This can be achieved from design drawings. After that, the following steps will be taken to compute steel quantity.

calculate the required number of bars for both directions.

No. of bars = +1 Equation 8 where L or W: length or width of footing

Then, find the length of one bar

Length of bar = L or W–concrete cover for both sides + 2*bend length Equation 9 Where L or W is length or width of footing

After that, compute the total length of bars which is equal to the number of required bars multiply by the length of one bar. If the same size of bars is used in both directions then you can sum up both quantity of the bars Convert that length into kilograms or Tons. This can be done by multiplying cross section area of steel by its total length by density of steel which 7850 kg/m 3

The above calculation procedure is for single reinforcing net. Therefore, for footings with the double reinforcing net, the same procedure need to be used again to compute steel quantity for another reinforcing net.

## How to calculate quantity of steel required for beam in kg?

How much quantity of steel required for slab, beam, column and footing per 1m3 of concrete –

- Example 1
- IN SLAB
- How much quantity of steel required in slab per 1m3 of concrete
- ● As given volume of concrete 1m3 of slab

● Calculate Steel quantity in slab as 1% of volume of concrete = 0.01× 7850× 1= 78.50kg:- according to using Thumb Rule Steel quantity required for RCC slab should be 1% of total volume of concrete, here steel density = 7850 kg/m3, so quantity of steel in 1m3 of concrete slab = 0.01× 7850× 1= 78.50kg, so, therefore 78.50kg of Steel are required for slab per 1m3 of concrete.

- Example 2
- FOR COLUMN
- How much quantity of steel required for column per 1m3 concrete.
- ● As given volume of concrete 1m3 of column

● Calculate Steel quantity required for column as 2.5% of volume of concrete = 0.025× 7850× 1= 196kg:- according to using Thumb Rule Steel quantity required for RCC column should be 2.5% of total volume of concrete, here steel density = 7850 kg/m3, so quantity of steel in 1m3 of concrete column = 0.025× 7850× 1= 196kg, so, therefore 196kg of Steel are required for column per 1m3 of concrete.

- Notes : 196kg of Steel are required for column per 1m3 of concrete.
- Example 3
- FOR BEAM
- How much quantity of steel required for beam per 1m3 concrete.
- ● As given volume of concrete 1m3 of beam

● Calculate Steel quantity required for beam as 2% of volume of concrete = 0.02× 7850× 1= 157kg:- according to using Thumb Rule Steel quantity required for RCC beam should be 2% of total volume of concrete, here steel density = 7850 kg/m3, so quantity of steel in 1m3 of concrete beam = 0.02× 7850× 1= 157kg, so, therefore 157kg of Steel are required for beam per 1m3 of concrete.

- Notes : 157kg of Steel are required for beam per 1m3 of concrete.
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- Example 4
- FOR FOOTING
- How much quantity of steel required for footing per 1m3 concrete.
- ● As given volume of concrete 1m3 of footing

● Calculate Steel quantity required for footing as 0.5% of volume of concrete = 0.005× 7850× 1= 39.25kg:- according to using Thumb Rule Steel quantity required for RCC footing should be 0.5% of total volume of concrete, here steel density = 7850 kg/m3, so quantity of steel in 1m3 of concrete footing = 0.005× 7850× 1= 39.25kg, so, therefore 39.25kg of Steel are required for footing per 1m3 of concrete.

Notes: approx 40kg of Steel are required for footing per 1m3 of concrete. Conclusion: To calculate the quantity of steel needed for rcc structure, multiply the Length, Width and Thickness in meter to get volume of concrete in m3. Multiply 1% to volume of concrete slab to density of steel (7850 kg/m3) to get quantity of steel required for slab in kg.

: How to calculate quantity of steel in slab, column, beam & footing

#### How to compute number of steel bars in a slab?

Calculate Steel Quantity for Slab –

Obtain slab dimension and reinforcement details from design drawings as shown in Fig.1. Compute number of steel bars.

Main Steel Bars No. of bars= (Slab length(L)/spacing)+1 Equation 1 Shrinkage and Temperature Steel Bars No. of bars= (Slab length(S)/spacing)+1 Equation 2 In equation 1, center to center spacing of main reinforcement steel bars are used and shrinkage and temperature bar spacing is used in equation 2. Fig.1: Types and arrangement of steel bars in one way slab 3. Calculate cutting length: Main steel bars Cutting length= clear span(S)+Ld+inclined length+2×45 degree bend Equation 3 Shrinkage and Temperature steel bars Cutting length= clear span(S)+Ld+inclined length+2×45 degree bend Equation 4 Where: Ld: development length which illustrated in Fig.2. Fig.2: Bent up bars in slab 3. Convert that length into kilograms or tons because steel bars are ordered by weight. The same equation used for both main and shrinkage and temperature reinforcement, but corresponding cutting length, number of bars, and bar diameter is used. Main steel bars=No. of bars*cutting length*weight of the bar ( /162) Equation 7 ( /162) is the weight of a steel which is derived from steel volume times its density which is 7850 kg/m 3,