STEEL UNIVERSAL BEAM SIZES AND DIMENSIONS

Steel universal beams sizes, dimensions and section properties are given in the following chart per BS 4-1:2005 "Structural steel sections. Specification for hot-rolled sections" and Steel Designers' Manual. BS 4-1:2005 standard specifies the dimensions and mass of the hot-rolled 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:

INPUT PARAMETERS
Nominal Dimensions Mass per Meter

 

Steel Universal Beam Sizes and Dimensions
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 tw ---
Flange thickness tf ---
Root radius r ---
Depth between fillets d ---
Area of section A --- cm2
Second moment of area about X axis Ix --- cm4
Second moment of area about Y axis Iy ---
Radius of gyration about X axis rx --- cm
Radius of gyration about Y axis ry ---
Elastic section modulus about X axis Sx --- cm3
Elastic section modulus about Y axis Sy ---
Plastic section modulus about X axis  Zx ---
Plastic section modulus about Y axis Zy ---
Buckling parameter u --- ---
Torsional index x --- ---
Warping constant H --- dm6
Torsional constant J --- cm4

Note: Use dot "." as decimal separator.

Definitions:

Second Moment of Area: The capacity of a cross-section 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 4-1:2005 - Structural steel sections. Specification for hot-rolled sections
  • SCI (Steel Construction Institute), Steel Designers' Manual, 7th Edition, John Wiley & Sons, 2012.