American standard beam (S Beam or Shape) dimensions, sizes and section properties.
American standard beam is generally known as S beam or S shape. S shape is a rolled section with two parallel flanges connected by a web. S shapes have relatively narrow flanges. The designation of the S beam gives information about the width and weight per unit length. For example S12 X 50 means 12 inches depth and 50 pounds per foot weight per unit length.
The dimensions of the standard S beams are defined in the annex of ASTM A 6/A 6M standard.
Note: Use dot "." as decimal separator.
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.