# How to Calculate Steel Quantity from Drawing

How to Calculate Steel Quantity from Drawing

Estimation of steel quantity is an essential skill of any civil engineer. Every civil engineer must know the method of calculation steel quantity from drawing.

Data requires for estimation of steel quantity:

1) Plan of Section or Element. (Slab, Beam, Column & Foundation)

2) Section and Elevation Details.

3) All dimensions must be clear and co-related.

### Steel Quantity Calculation for Slab:

Let, us take one example of a slab for steel estimation.

Following Quantity, we have to calculate from drawing.

• Cement Concrete for Slab.
• Centering and Shuttering for Slab.
• Weight of 12mm dia. Bars.
• Weight of 8mm dia. Bars.
• Prepare Bar Bending Schedule.

(Note:  Weight of Steel bars 12mm – @ 0.9 kg / m

8 mm – @ 0.4 kg/m,

How to Calculate Steel Quantity from Drawing

## Estimation Sheet:

(See drawing in to in dimension (without the wall) of the slab is given 3 m x 4 m. For calculating Quantity of slab concrete we have to calculate out to out the dimension of the slab.)

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(Formwork Quantity is calculated in a square meter. There is one bottom portion and 4 side shuttering. For bottom we have in to in dimension of slab 3m x 4m. For Side formwork, there is 2 different dimensions, 2 with 4 m side and 2 with 3 m sides. For the total length we have to add wall width of both sides to get the total length.)

Read More: ESTIMATION OF A BUILDING WITH PLAN

How to Calculate Steel Quantity from Drawing

(In case of bent up bars are provided on both sides, we have to add 0.45 X twice in length)

#### Bar Bending Schedule for Slab:

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