HSS8×8×5/16 square/rectangular HSS tube

Detailing dimensions and section properties from the AISC Shapes Database, 16th Edition. Values are shown to the nearest 1/16 in. as they appear on a shop drawing.

HSS8×8×5/16 is a square tube 8 in. by 8 in. with a 5/16 in. nominal wall.

At 31.84 lb per foot it is one of the 7 HSS8×8 sizes, which run from 13.26 to 59.32 lb/ft.

For strong-axis bending its section modulus is Sx = 21.4 in³ and its moment of inertia Ix = 85.6 in⁴, with a plastic modulus Zx = 25.1 in³.

Detailing dimensions

Depth (Ht)8"
Width (B)8"
Nominal wall (t)5/16"

Section properties

Weight31.84 lb/ft
Area (A)8.76 in²
Ix85.6 in⁴
Sx21.4 in³
Zx25.1 in³
rx3.13 in
Iy85.6 in⁴
Sy21.4 in³
Zy25.1 in³
ry3.13 in
J136 in⁴

Other HSS8×8 sizes

Same nominal size, different weight — useful when you are checking a substitution or a lighter section.

HSS8×8×1/8HSS8×8×3/16HSS8×8×1/4HSS8×8×3/8HSS8×8×1/2HSS8×8×5/8

All HSS8×8 sizes and dimensions →

Similar weight HSS shapes

Comparable 31.84 lb/ft sections in other HSS tube sizes.

HSS12×4×5/1631.84 lb/ft · Sx 24.1 in³HSS10×6×5/1631.84 lb/ft · Sx 23.5 in³HSS9×7×5/1631.84 lb/ft · Sx 22.6 in³HSS8×3×1/231.84 lb/ft · Sx 14.6 in³HSS7×4×1/231.84 lb/ft · Sx 14.5 in³HSS6×5×1/231.84 lb/ft · Sx 13.7 in³HSS12.000×0.25031.4 lb/ft · Sx 24.8 in³HSS10.000×0.31232.31 lb/ft · Sx 20.9 in³

Detailing values are rounded to the nearest 1/16 in. per the AISC Steel Construction Manual. Verify critical dimensions against the current Manual before fabrication. Need HSS8×8×5/16 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: HSS tube · Steel Beam Size Chart

Interactive drawing