HSS3×3×5/16 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.

HSS3×3×5/16 is a square tube 3 in. by 3 in. with a 5/16 in. nominal wall.

At 10.58 lb per foot it is one of the 5 HSS3×3 sizes, which run from 4.75 to 12.17 lb/ft.

For strong-axis bending its section modulus is Sx = 2.3 in³ and its moment of inertia Ix = 3.45 in⁴, with a plastic modulus Zx = 2.9 in³.

Detailing dimensions

Depth (Ht)3"
Width (B)3"
Nominal wall (t)5/16"

Section properties

Weight10.58 lb/ft
Area (A)2.94 in²
Ix3.45 in⁴
Sx2.3 in³
Zx2.9 in³
rx1.08 in
Iy3.45 in⁴
Sy2.3 in³
Zy2.9 in³
ry1.08 in
J5.94 in⁴

Other HSS3×3 sizes

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

HSS3×3×1/8HSS3×3×3/16HSS3×3×1/4HSS3×3×3/8

All HSS3×3 sizes and dimensions →

Similar weight HSS shapes

Comparable 10.58 lb/ft sections in other HSS tube sizes.

HSS4×2×5/1610.58 lb/ft · Sx 2.56 in³HSS3-1/2×2-1/2×5/1610.58 lb/ft · Sx 2.48 in³HSS5×2×1/410.51 lb/ft · Sx 3.23 in³HSS4×3×1/410.51 lb/ft · Sx 3.07 in³HSS3-1/2×3-1/2×1/410.51 lb/ft · Sx 2.88 in³HSS3.500×0.31310.66 lb/ft · Sx 2.18 in³HSS7×2×3/1610.7 lb/ft · Sx 4.49 in³HSS6×3×3/1610.7 lb/ft · Sx 4.47 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 HSS3×3×5/16 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: HSS tube · Steel Beam Size Chart

Interactive drawing