AMERICAN STANDARD BEAM (S SHAPE) SIZES
"American Standard Beam (S Shape) Sizes Calculator" has been developed to show basic
dimensions and sectional 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.
Calculator:
Calculator:

OUTPUT PARAMETERS 
Parameter 
Symbol 
Value 
Unit 
Designation 
 


 
Weight per unit length 
W 


lb/ft

Cross section area 
A 


in^2

Depth 
d 


in

Web thickness 
t_{w} 


Flange width 
b_{f} 


Flange thickness 
t_{f} 


Second moment of area 
I_{xx} 


in^4

Second moment of area 
I_{yy} 


Section modulus 
S_{xx} 


in^3

Section modulus 
S_{yy} 


Radius of gyration 
r_{x} 


in 
Radius of gyration 
r_{y} 


Note: Use dot "." as decimal separator.
Definitions:
Second Moment of Area: The
capacity of a crosssection 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. (2012) .
Machinery's Handbook
. 29th edition. Industrial Press Inc., pp 2594  2597
 A 6/A 6M  05a , Standard Speciﬁcation for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling