HSS12×8×5/16 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.

HSS12×8×5/16 is a rectangular tube 12 in. by 8 in. with a 5/16 in. nominal wall.

At 40.35 lb per foot it is one of the 6 HSS12×8 sizes, which run from 24.73 to 76.33 lb/ft.

For strong-axis bending its section modulus is Sx = 37.4 in³ and its moment of inertia Ix = 224 in⁴, with a plastic modulus Zx = 44.9 in³.

Detailing dimensions

Depth (Ht)12"
Width (B)8"
Nominal wall (t)5/16"

Section properties

Weight40.35 lb/ft
Area (A)11.1 in²
Ix224 in⁴
Sx37.4 in³
Zx44.9 in³
rx4.5 in
Iy120 in⁴
Sy30.1 in³
Zy34.1 in³
ry3.29 in
J248 in⁴

Other HSS12×8 sizes

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

HSS12×8×3/16HSS12×8×1/4HSS12×8×3/8HSS12×8×1/2HSS12×8×5/8

All HSS12×8 sizes and dimensions →

Similar weight HSS shapes

Comparable 40.35 lb/ft sections in other HSS tube sizes.

HSS16×4×5/1640.35 lb/ft · Sx 38.5 in³HSS14×6×5/1640.35 lb/ft · Sx 38.7 in³HSS10×10×5/1640.35 lb/ft · Sx 34.5 in³HSS11.750×0.33741.12 lb/ft · Sx 31.4 in³HSS20×4×1/439.43 lb/ft · Sx 45.8 in³HSS18×6×1/439.43 lb/ft · Sx 46.5 in³HSS16×8×1/439.43 lb/ft · Sx 46.1 in³HSS14×10×1/439.43 lb/ft · Sx 44.3 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 HSS12×8×5/16 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: HSS tube · Steel Beam Size Chart

Interactive drawing