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HSS3 Round Tube Sizes

The HSS3 Round series runs 7 sizes, from HSS3x.25 at 7.35 lb/ft to HSS3x.125 at 3.84 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.

HSS3 Round sizes, heaviest first

Size	lb/ft	OD (in)	t (in)	A (in²)	Ix (in⁴)	Sx (in³)	Zx (in³)
HSS3x.25	7.35	3	0.233	2.03	1.95	1.3	1.79
HSS3x.216	6.43	3	0.201	1.77	1.74	1.16	1.58
HSS3x.203	6.07	3	0.189	1.67	1.66	1.1	1.5
HSS3x.188	5.65	3	0.174	1.54	1.55	1.03	1.39
HSS3x.152	4.63	3	0.141	1.27	1.3	0.865	1.15
HSS3x.134	4.11	3	0.124	1.12	1.16	0.774	1.03
HSS3x.125	3.84	3	0.116	1.05	1.09	0.73	0.965

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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