HSS8×4×5/16 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.

HSS8×4×5/16 is a rectangular tube 8 in. by 4 in. with a 5/16 in. nominal wall.

At 23.34 lb per foot it is one of the 7 HSS8×4 sizes, which run from 9.86 to 42.3 lb/ft.

For strong-axis bending its section modulus is Sx = 12.8 in³ and its moment of inertia Ix = 51 in⁴, with a plastic modulus Zx = 16.1 in³.

Detailing dimensions

Depth (Ht)8"
Width (B)4"
Nominal wall (t)5/16"

Section properties

Weight23.34 lb/ft
Area (A)6.43 in²
Ix51 in⁴
Sx12.8 in³
Zx16.1 in³
rx2.82 in
Iy17.2 in⁴
Sy8.58 in³
Zy9.91 in³
ry1.63 in
J42.6 in⁴

Other HSS8×4 sizes

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

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

All HSS8×4 sizes and dimensions →

Similar weight HSS shapes

Comparable 23.34 lb/ft sections in other HSS tube sizes.

HSS10×2×5/1623.34 lb/ft · Sx 12.5 in³HSS9×3×5/1623.34 lb/ft · Sx 12.8 in³HSS7×5×5/1623.34 lb/ft · Sx 12.3 in³HSS6×6×5/1623.34 lb/ft · Sx 11.4 in³HSS7.500×0.31223.97 lb/ft · Sx 11.4 in³HSS5.000×0.50024.05 lb/ft · Sx 6.88 in³HSS12×3×1/424.12 lb/ft · Sx 17.2 in³HSS10×5×1/424.12 lb/ft · Sx 17.2 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 HSS8×4×5/16 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: HSS tube · Steel Beam Size Chart

Interactive drawing