All about civil construction knowledge- PARAM VISIONS

How to calculate the weight of hollow square steel section.

 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


Here, thickness T = 2mm.  breadth B = 50mm and 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 
             
             = 0.05 × 0.002 × 2 

             = 0.0002 square meter.

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

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

                =[ 46 mm × 2mm. ×2nos.]

               = 0.046 × 0.002 × 2

              = 0.000184 square meter.


Now, total sectional area A = A1 +A2

            = 0.0002 +0.000184

           = 0.000384 square meter.


As you know, volume =  area × length 

                                   = A  × L 

                                   = 0.000384 × 1

                                  =  0.000384 cubic meter.

The density of mild steel is 7850 kg./cum.

So, the weight of the hollow square MS tube

                              = volume × density

                              = 0.000384 × 7850

                              = 3.014 kg.

For you ๐Ÿ‘‡

❤ Calculating the weight of mild steel plate -  rectangular, square, and circular. 


          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

              = 0.0025 square meter.

          

Area a2 =  46mm.× 46 mm.

              ( i.e. inner hollow part )

               = 0.046  ×0.046

               = 0.002116 square meter.


Now, the total sectional area

             A = a1 - a2

               =0.0025 - 0.002116

              = 0.000384 square meter.


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

Volume = 0.00384  × 1

              =  0.000384 cubic meter.

So, the weight of the hollow square MS tube

                              = volume × density

                              = 0.000384 × 7850

                              = 3.014 kg.

   PART 1๐Ÿ‘ˆ Back                                             continued ๐Ÿ‘‰ PART 3

                                                                                         

Thank you for going through this calculation๐Ÿ˜ƒ. 

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

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