SQUARE HOLLOW STRUCTURAL SECTIONS (HSS) PROPERTIES AND DIMENSIONS
Square hollow structural sections (Square HSS
or Square Tubing) sizes, dimensions and section properties are given in the following
square tube dimensions chart per
Steel Construction Manual.
Square HSS have an square cross section except for rounded corners. Square HSS are designated by "HSS", overall outside dimension (in.), and wall thickness.
HSS5x5x1/2 is nominally 5 in. by 5 in. with a 1/2 in. wall thickness.
Moment of inertia, elastic section modulus, radius of gyration, torsional moment
of inertia and plastic section modulus values are given by the following
calculator for the selected square HSS / tube .
Calculator:

OUTPUT PARAMETERS 
Parameter 
Symbol 
Value 
Unit 
Shape 
 


 
Design wall thickness* 
t_{des} 


in 
Nominal weight 
w 


lb/ft 
Area 
A 


in^{2} 
b/t 
 


 
h/t 
 


 
Second moment of area 
I 


in^{4} 
Elastic section modulus 
S 


in^{3} 
Radius of gyration 
r 


in 
Plastic section modulus 
Z 


in^{3} 
Workable flat 
 


in 
Polar moment of area 
J 


in^{4} 
Torsional constant for HSS shapes 
C 


in^{3} 
The total surface area of a square HSS section per feet 
A_{surf} 


ft^{2}/ft 
Note: Use dot "." as decimal separator.
Note *:The design wall thickness t, shall be used in calculations involving the wall thickness of hollow structural sections (HSS) per Steel Construction Manual Section B3.12.
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: