HSS20×12×5/16 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.

HSS20×12×5/16 is a rectangular tube 20 in. by 12 in. with a 5/16 in. nominal wall.

At 65.87 lb per foot it is the lightest of the 7 HSS20×12 sizes, which run from 65.87 to 195.4 lb/ft.

For strong-axis bending its section modulus is Sx = 101 in³ and its moment of inertia Ix = 1010 in⁴, with a plastic modulus Zx = 122 in³.

Detailing dimensions

Depth (Ht)20"
Width (B)12"
Nominal wall (t)5/16"

Section properties

Weight65.87 lb/ft
Area (A)18.1 in²
Ix1010 in⁴
Sx101 in³
Zx122 in³
rx7.48 in
Iy464 in⁴
Sy77.3 in³
Zy85.8 in³
ry5.07 in
J997 in⁴

Other HSS20×12 sizes

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

HSS20×12×3/8HSS20×12×1/2HSS20×12×5/8HSS20×12×3/4HSS20×12×7/8HSS20×12×1

All HSS20×12 sizes and dimensions →

Similar weight HSS shapes

Comparable 65.87 lb/ft sections in other HSS tube sizes.

HSS24×8×5/1665.87 lb/ft · Sx 104 in³HSS22×10×5/1665.87 lb/ft · Sx 103 in³HSS16×16×5/1665.87 lb/ft · Sx 92.3 in³HSS20.000×0.31365.77 lb/ft · Sx 87.4 in³HSS12.750×0.50065.48 lb/ft · Sx 53.2 in³HSS10.750×0.62567.65 lb/ft · Sx 44.8 in³HSS14×4×5/867.82 lb/ft · Sx 53.3 in³HSS12×6×5/867.82 lb/ft · Sx 53.4 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 HSS20×12×5/16 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: HSS tube · Steel Beam Size Chart

Interactive drawing