 In this article I have described about how to calculate weight of steel in slab. So read it carefully one by one.

In the image below I have solved one example of slab to calculate it’s total rod weight. In the slab below I have given following information. How to calculate weight of steel rod in slab

The length and breadth of slab is 10 meter and 7 meter respectively.

The shorter span has provided main rod and longer span has provided distribution rod as shown in the figure.

Beside this the slab has following information,

For main bars
Length of on rod = 7 meter
Diameter = 12 mm
Center to Center gap (c/c) = 5 inch

For Distribution bars
Length of on rod = 8 meter
Diameter = 10 mm
Center to Center gap (c/c) = 5 inch

Now you have to see the calculation carefully to understand step by step.

Step:- 1
Calculate no. of Steel bar

For main bar

= L”/(c/c) + 1
= (8/0.127) +1
= 63.99
You can provide 64 bars

Now, For Distribution Bar
= L/(c/c) + 1
= (7/0.127)+ 1
=56.11
You can Provide 57 bars

Step:-2
Calculate total length of steel bars

For main bars
= 64 * Length of one Main Rod
= 64* 7
= 448 m

Simillarly,
For distribution bars
= 57* Length of one Distribution bar
= 57* 8
= 456 m

Step:-3

Calculate weight of Steel bar

For main bar,
={(D^2)/162} * L
= {(12^2)/162} * 448
= 398.2 kg

Keep in mind that unit of Diameter (D) must be in millimeter and Length (L) must be in meter. And final result will be in Kg.

For more read This

For Distribution bar
{(D^2)/162} * L
= {(10^2)/162} * 456
= 281.48 kg

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So, dear friend I have tried my best to make you understand the way of calculating weight of steel rod in slab, further if you have any question regarding it then feel free to ask me through comment below.