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HSS4 Round Tube Sizes

The HSS4 Round series runs 7 sizes, from HSS4x.313 at 12.34 lb/ft to HSS4x.125 at 5.18 lb/ft. They share one outside diameter, so the sizes in it differ only in wall thickness and every one of them fits the same saddle.

HSS4 Round sizes, heaviest first

Size	lb/ft	OD (in)	t (in)	A (in²)	Ix (in⁴)	Sx (in³)	Zx (in³)
HSS4x.313	12.34	4	0.291	3.39	5.87	2.93	4.01
HSS4x.25	10	4	0.233	2.76	4.91	2.45	3.31
HSS4x.237	9.53	4	0.22	2.61	4.68	2.34	3.15
HSS4x.226	9.12	4	0.21	2.5	4.5	2.25	3.02
HSS4x.22	8.89	4	0.205	2.44	4.41	2.21	2.96
HSS4x.188	7.66	4	0.174	2.09	3.83	1.92	2.55
HSS4x.125	5.18	4	0.116	1.42	2.67	1.34	1.75

Relevant tools

Steel Shape Properties Table
search and compare across every series
Beam Shear, Moment and Deflection Diagram Calculator
check a span made up of one of these sizes
All Shape Series
every published series, W-shapes through round HSS

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