HSS6.875x.312 – HSS Shapes - Round

HSS6.875x.312 is a 6.875 in (175 mm) diameter round hollow section with a 0.312 in (8 mm) nominal wall, weighing 21.89 lb/ft (32.6 kg/m).

Round HSS are closed, circular tube sections, sharing the torsional and biaxial strength advantages of rectangular HSS but in a circular profile that's often preferred where appearance matters — exposed columns, canopy supports, and architectural framing — as well as more utilitarian uses like handrail posts and bollards. The circular shape distributes compressive and torsional loads evenly in every direction, making round HSS a strong, materially efficient choice wherever a round column or post is wanted rather than a square or rectangular one.

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Dimensions

PropertyValue
Nominal Weight (lb/ft)21.89
Outside Diameter (in)6.875
Nominal Thickness (in)0.312

Full sortable table: Dimensions table for this family

Section Properties

PropertyValue
Ix (in⁴)32.7
Zx (in³)12.6
Sx (in³)9.51
rx (in)2.33
Iy (in⁴)32.7
Zy (in³)12.6
Sy (in³)9.51
ry (in)2.33
J (in⁴)65.4
C (in³)19

Full sortable table: Section properties table for this family