# AMERICAN STANDARD BEAM (S BEAM) DIMENSIONS SIZES

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.

### American Standard Beam (S Beam) Dimensions Calculator:

 INPUT PARAMETERS Nominal Depth Weight in pounds per foot S24 S20 S18 S15 S12 S10 S8 S7 S6 S5 S4 S3

 OUTPUT PARAMETERS Parameter Value Designation --- --- Weight per unit length [W] --- lb/ft Cross section area [A] --- in^2 Depth [d] --- in Web thickness [tw] --- Flange width [bf] --- Flange thickness [tf] --- Second moment of area [Ixx] --- in^4 Second moment of area [Iyy] --- Section modulus [Sxx] --- in^3 Section modulus [Syy] --- Radius of gyration [rx] --- in Radius of gyration [ry] ---

Note: Use dot "." as decimal separator.

### Reference:

• Oberg, E. , Jones ,F.D. , Horton H.L. , Ryffel H.H., (2016) . Machinery's Handbook . 30th edition.  Industrial Press Inc. pp 2614
• A 6/A 6M - 05a , Standard Speciﬁcation for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling