All about civil construction knowledge- PARAM VISIONS

Calculating the weight of I- beam & H - beam sections.

 Nowadays, you will get a readymade weight calculator and weight chart for all types of I - beam or H -beam sections of different dimensions. You can calculate the weight, just by entering the values in the calculator. 

Beam section.

All of these beam sections come with a corner radius or with sharp corners as shown in the fig. below.

I - beam with radius.



I - beam with a sharp corner.


I have shown below, the calculation procedure for all radius sharp I - beam sections with equal flange width, having 3m. length.


Here, beam height H = 400mm., flange width w = 150mm., flange thickness t = 12mm., web thickness b = 14mm., and length L =3m.


Now, the area of the two equal flanges

 A1 = flange width (w) × flange thickness (t) × 2nos.

      = 150mm × 12mm. × 2nos.

Converting it into meters,

      = 0.15m × 0.012m. × 2

 A1 = 0.0036 sq.m.


The area of the web ( pink colored area )



A2 = (beam height - (2 × flange thickness)) × web thickness

      = (400mm - ( 2 × 12mm)) × 14mm.

      = 376mm. × 14mm.

Converting them into meters,

      = 0.376m × 0.014m 

A2 = 0.005264 sq.m.


Total sectional area 

A = area of flange (A1) + area of the web (A2)

    =0.0036 + 0.005264

   = 0.008864 sq.m.


Now, the volume of the I - beam

   = Area (A) × Length (L)

    = 0.008864sq.m. × 3m.

    = 0.026592 cubic meter.


Weight of the I - beam section 

     = volume × density

     = 0.026592 cu.m. × 7850 kg/cu.m.

Here, the density of steel is taken as 7850kg/cu.m. for the calculation purpose.

     Weight = 208.747 kg.



NOTE

 1. When the flange width is unequal, we have to calculate the area of the top and bottom flanges separately.

2. The calculation procedure for all types of I -beam ad H -beam (having sharp corners) will be the same as explained above.




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