# AMERICAN STANDARD BEAM (S SHAPE) SIZES

"American Standard Beam (S Shape) Sizes Calculator" has been developed to show basic dimensions and section properties of American standard beam (S shape).

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 shape 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 shapes are defined in the annex of ASTM A 6/A 6M standard.

### American Standard Beam (S Shape) Sizes 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.

### Supplements:

 Link Usage Standard Steel I-Beam Sizes Chart Tabulated form of the American standard beam (S Shape) sizes calculator.

### 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:

• 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