# 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 914x419 914x305 838x292 762x267 686x254 610x305 610x229 533x210 457x191 457x152 406x178 406x140 356x171 356x127 305x165 305x127 305x102 254x146 254x102 203x133 203x102 178x102 152x89 127x76

##### 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.