Universal Beams - 686x254x140

United Kingdom Universal Beams (UB), often called I-beams, are structural steel elements with an 'I' or 'H' shaped cross-section designed to carry high bending loads. They are primarily employed in structural engineering and construction scenarios where long spans and significant load-bearing capacity are required without excessive weight. You will commonly find them used as primary horizontal supports in multi-storey buildings, commercial warehouses, and industrial frameworks to transfer floor and roof loads to columns. They are also heavily utilized in residential renovations, such as creating open-plan living spaces by supporting upper floors when load-bearing walls are removed. Additionally, UBs serve as critical components in civil engineering projects, including bridge decks, gantries, and temporary shoring systems for deep excavations, because their design maximizes efficiency by placing the steel exactly where the bending stresses are highest.

Dimensions

PropertyValue
kg/m140.1
D mm683.5
B mm253.7
t mm12.4
T mm19
r mm15.2
d mm615.1
b/T6.68
d/t49.6
C mm8
N mm132
n mm36
m22.33
m216.6

Full sortable table: Dimensions table for this category

Section Properties

PropertyValue
Second Moment of Area (x-x) - cm4136000
Second Moment of Area (y-y) - cm45180
Radius of Gyration (x-x) - cm27.6
Radius of Gyration (y-y) - cm5.39
Elastic Modulus (x-x) - cm33990
Elastic Modulus (y-y) - cm3409
Plastic Modulus (x-x) - cm34560
Plastic Modulus (y-y) - cm3638
Buckling Parameter - u0.868
Torsional Index - x38.7
Warping Constant - H dm65.72
Torsional Constant - J cm4169
Area of Section - A cm2178

Full sortable table: Properties table for this category