HSS12×3×5/16 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.

HSS12×3×5/16 is a rectangular tube 12 in. by 3 in. with a 5/16 in. nominal wall.

At 29.72 lb per foot it is the heaviest of the 3 HSS12×3 sizes, which run from 18.35 to 29.72 lb/ft.

For strong-axis bending its section modulus is Sx = 20.7 in³ and its moment of inertia Ix = 124 in⁴, with a plastic modulus Zx = 27.9 in³.

Detailing dimensions

Depth (Ht)12"
Width (B)3"
Nominal wall (t)5/16"

Section properties

Weight29.72 lb/ft
Area (A)8.17 in²
Ix124 in⁴
Sx20.7 in³
Zx27.9 in³
rx3.9 in
Iy13.1 in⁴
Sy8.73 in³
Zy10 in³
ry1.27 in
J41.3 in⁴

Other HSS12×3 sizes

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

HSS12×3×3/16HSS12×3×1/4

Similar weight HSS shapes

Comparable 29.72 lb/ft sections in other HSS tube sizes.

HSS10×5×5/1629.72 lb/ft · Sx 20.8 in³HSS12×12×3/1629.84 lb/ft · Sx 31.5 in³HSS10×3×3/830.03 lb/ft · Sx 17.6 in³HSS6.000×0.50029.4 lb/ft · Sx 10.4 in³HSS14×4×1/429.23 lb/ft · Sx 25.4 in³HSS12×6×1/429.23 lb/ft · Sx 25.2 in³HSS10×8×1/429.23 lb/ft · Sx 23.8 in³HSS9×9×1/429.23 lb/ft · Sx 22.7 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 HSS12×3×5/16 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: HSS tube · Steel Beam Size Chart

Interactive drawing