### How to calculate the weight of hollow square steel section.

For the calculation procedure, go through the following steps.👇

Let us consider a hollow mild steel square section ( tube or pipe) of dimension 50mm × 50mm.× 2mm. as shown in the drawing below. Let us take a pipe of 1meter length. Hollow mild steel square section

Given data:

Thickness = T = 2mm.

Length = L =1m. Hollow steel square tube.

First, we will calculate the sectional area in two parts, the orange-colored part area as A1, and green colored part area as A2.

Area A1 = [ Breadth( B) × Thickness (T) × 2nos.]
= [ 50mm × 2mm. × 2nos.]

By converting mm. unit into meters, we get

A1 = [0.05 × 0.002 × 2]

A1 = 0.0002 m²

Area A2  =[ { B - ( 2 × T )} × T × 2 nos]

= [{50 mm. - ( 2 × 2mm. )} × 2mm. × 2 nos]

=[ 46 mm. × 2mm. × 2nos.]

= [0.046 × 0.002 × 2]

A2 = 0.000184 m²

Now, total sectional area

A  = [ A1 +A2]

= [0.0002 +0.000184]

= 0.000384 m²

As you know,

volume V = [ area × length ]

= [ A  × L ]

= [ 0.000384 m² × 1m. ]

V =  0.000384 m³

The density of mild steel is 7850 kg./m³

So, the weight of the hollow square MS tube

= [volume × density]

= [0.000384 × 7850]

= 3.014 kg.

For you 👇

### Alternate method:

First, we will calculate the total area inclusive of the hollow part, and then we will deduct the pipe's inner hollow portion (shown in brown color).

Area a1   = [B × B]

= [50mm. × 50mm.]

By converting mm. unit into meters, we get

a1 = [0.05 × 0.05]

a1 = 0.0025  m²

Area a2 =  [46mm.× 46 mm.]

( i.e. inner hollow part )

= [0.046  ×0.046]

a2 = 0.002116  m²

Now,

the total sectional area

A = [a1 - a2]

= [ 0.0025 - 0.002116]

A = 0.000384  m²

Note: We got the same area (A ) as calculated before.

Volume = [0.00384 m² × 1m.]

V =  0.000384 m³

So, the weight of the hollow square MS tube

= [volume × density]

= [0.000384 × 7850]

= 3.014 kg.

PART 1👈 Back                                             continued 👉 PART 3

Thank you for going through this calculation😃.

If you have any queries, you can ask in the comment section.

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