We will learn in this article that How to calculate formula weight of TMT bar in Kg/m? W=D²*L/162, where D is the diameter and L is the length.

How to calculate formula weight of TMT bar in Kg/m ? 

W=D²*L/162

 

Let us,

Assume and calculate formulate to calculate unit weight of the bar

• Steel bar Diameter=''d''

• Length of bar=''l''

       

        Weight of steel bar (W) = Density of steel bar (ɣ) x volume of steel bar (V)

        Density of steel bar    =    7850 kg/m³        

        Volume f steel bar (V) =    cross-sectional area of steel bar x length

                                      V =    A x l

                                        A =    (πd²/4)

    W     =    (πd²/4) x (length of bar) x (density of steel bar)

    

    W     =    (πd²/4) x (1 m) x (7850 kg/m³)

Hence, is steel diameter in mm, and the density of steel is in kg/m³ to make constant value in the same unit, We will convert Dia. of steel from mm to m. {D² mm/1000²}

        W    =    (πd²/4x1000x1000 mm) x (7850  kg/m³)

        W    =    (3.143xd²/4x1000x1000 mm) x (7850  kg/m³)

        W    =    (3.143xd²/4x1000x1000 mm) x (7850  kg/m³)

        W    =    d²  / (1/0.00616225) kg/m

        W    =    d²  / 162.25 kg/m 

  Say W    =   D²  / 162 kg/m

Hence, proved How to find a formula for the calculation of steel bar in kg/m.

Formula for TMT steel bar weight calculation

W = D²  / 162  kg/m

Conclusion

We find here formula (W    =   D²  / 162 kg/m) for construction engineers & Architectures to calculate TMT steel bar weight. 

Important Note: 

• The length of the TMT Steel Bar is 12 meters in general standard.

• Weight Tolerance of TMT steel bars is IS 1786:2008 as per IS guidelines.

• According to the IS standard, a tolerance of + or – 7% is considered acceptable.

• The different sizes (diameter) of TMT steel bars produced are 8mm, 12mm, 16mm, 20mm, 25mm, 28mm, and 32mm.

• The different grades of TMT bars are Fe-415, Fe-500, Fe-550, and Fe-600. The grade of a TMT bar indicates its strength and rigidity.

• The TMT steel bars are generally calculated in kilogram, ton, or quintal (1 Quinta = 100 kg, 1 Ton = 1000 kg).