Steel tubes 31

Metric units Imperial units

Section	Dimensions			Properties
	D	t		I	W_el	A	G
	mm	mm		cm⁴	cm³	cm²/m	kg/m
Steel tubes 31	2997	21.0		21737000	145060	1963.4	1541.2

Section	Dimensions			Properties
	D	t		I	W_el	A	G
	in	in		in⁴	in³	in²	lb/ft
Steel tubes 31	118.0	0.827		522231.4	8852.1	304.3	1035.6

D	Diameter (external)
t	Thickness
I	Moment of inertia
W_el	Elastic section modulus
A	Cross sectional steel area
G	Mass