STEEL UNIVERSAL BEAM SIZES AND DIMENSIONS
Steel universal beams sizes, dimensions and section properties are given in the following chart per
BS 41:2005 "Structural steel sections. Specification for hotrolled sections" and
Steel Designers' Manual. BS 41:2005 standard specifies the dimensions and mass of the hotrolled structural steel sections: universal beams; universal columns; universal bearing piles; joists; structural tees cut from universal beams; structural tees cut from universal columns; and parallel flange channels. Dimensional, mass, length and straightness tolerances for universal beams are given in BS EN 10034.
Moment of inertia, elastic section modulus, radius of gyration, torsional index,
warping constant, torsional constant and plastic section modulus values are given by the following calculator for the selected universal beam size.
Calculator:

OUTPUT PARAMETERS 
Parameter 
Symbol 
Value 
Unit 
Section Designation 
 


 
Mass per meter 
M 


kg/m 
Depth of section 
h 


mm 
Width of section 
b 


Web thickness 
t_{w} 


Flange thickness 
t_{f} 


Root radius 
r 


Depth between fillets 
d 


Area of section 
A 


cm^{2} 
Second moment of area about X axis 
I_{x} 


cm^{4} 
Second moment of area about Y axis 
I_{y} 


Radius of gyration about X axis 
r_{x} 


cm 
Radius of gyration about Y axis 
r_{y} 


Elastic section modulus about X axis 
S_{x} 


cm^{3} 
Elastic section modulus about Y axis 
S_{y} 


Plastic section modulus about X axis 
Z_{x} 


Plastic section modulus about Y axis 
Z_{y} 


Buckling parameter 
u 


 
Torsional index 
x 


 
Warping constant 
H 


dm^{6} 
Torsional constant 
J 


cm^{4} 
Note: Use dot "." as decimal separator.
Definitions:
Second Moment of Area: The
capacity of a crosssection to resist bending.
Radius of Gyration (Area): The
distance from an axis at which the area of a body may be assumed to be
concentrated and the second moment area of this configuration equal to the
second moment area of the actual body about the same axis.
Section Modulus: The moment of
inertia of the area of the cross section of a structural member divided by the
distance from the center of gravity to the farthest point of the section; a
measure of the flexural strength of the beam.
Reference:
 BS 41:2005  Structural steel sections. Specification for hotrolled sections
 SCI (Steel Construction Institute),
Steel Designers' Manual, 7th Edition,
John Wiley & Sons, 2012.