HSS20×20×3/8 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.

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

At 98.94 lb per foot it is one of the 7 HSS20×20 sizes, which run from 82.88 to 249.85 lb/ft.

For strong-axis bending its section modulus is Sx = 174 in³ and its moment of inertia Ix = 1740 in⁴, with a plastic modulus Zx = 199 in³.

Detailing dimensions

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

Section properties

Weight98.94 lb/ft
Area (A)27.1 in²
Ix1740 in⁴
Sx174 in³
Zx199 in³
rx8 in
Iy1740 in⁴
Sy174 in³
Zy199 in³
ry8 in
J2680 in⁴

Other HSS20×20 sizes

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

HSS20×20×5/16HSS20×20×1/2HSS20×20×5/8HSS20×20×3/4HSS20×20×7/8HSS20×20×1

All HSS20×20 sizes and dimensions →

Similar weight HSS shapes

Comparable 98.94 lb/ft sections in other HSS tube sizes.

HSS24×16×3/898.94 lb/ft · Sx 188 in³HSS22×18×3/898.94 lb/ft · Sx 182 in³HSS12.750×0.75096.21 lb/ft · Sx 75.5 in³HSS20×6×5/8101.85000000000001 lb/ft · Sx 122 in³HSS18×8×5/8101.85000000000001 lb/ft · Sx 122 in³HSS16×10×5/8101.85000000000001 lb/ft · Sx 119 in³HSS14×12×5/8101.85000000000001 lb/ft · Sx 113 in³HSS26.000×0.375102.73 lb/ft · Sx 178 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 HSS20×20×3/8 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: HSS tube · Steel Beam Size Chart

Interactive drawing