HSS20×12×3/8 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.

HSS20×12×3/8 is a rectangular tube 20 in. by 12 in. with a 3/8 in. nominal wall.

At 78.52 lb per foot it is one 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 = 120 in³ and its moment of inertia Ix = 1200 in⁴, with a plastic modulus Zx = 144 in³.

Detailing dimensions

Depth (Ht)20"
Width (B)12"
Nominal wall (t)3/8"

Section properties

Weight78.52 lb/ft
Area (A)21.5 in²
Ix1200 in⁴
Sx120 in³
Zx144 in³
rx7.45 in
Iy547 in⁴
Sy91.1 in³
Zy102 in³
ry5.04 in
J1180 in⁴

Other HSS20×12 sizes

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

HSS20×12×5/16HSS20×12×1/2HSS20×12×5/8HSS20×12×3/4HSS20×12×7/8HSS20×12×1

All HSS20×12 sizes and dimensions →

Similar weight HSS shapes

Comparable 78.52 lb/ft sections in other HSS tube sizes.

HSS24×8×3/878.52 lb/ft · Sx 123 in³HSS22×10×3/878.52 lb/ft · Sx 122 in³HSS16×16×3/878.52 lb/ft · Sx 109 in³HSS24×14×5/1678.63 lb/ft · Sx 145 in³HSS22×16×5/1678.63 lb/ft · Sx 141 in³HSS20.000×0.37578.67 lb/ft · Sx 104 in³HSS24.000×0.31379.13 lb/ft · Sx 127 in³HSS16×4×5/876.33 lb/ft · Sx 67.3 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 HSS20×12×3/8 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: HSS tube · Steel Beam Size Chart

Interactive drawing