HSS20×20×1 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.

HSS20×20×1 is a square tube 20 in. by 20 in. with a 1 in. nominal wall.

At 249.85 lb per foot it is the heaviest 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 = 410 in³ and its moment of inertia Ix = 4100 in⁴, with a plastic modulus Zx = 486 in³.

Detailing dimensions

Depth (Ht)20"
Width (B)20"
Nominal wall (t)1"

Section properties

Weight249.85 lb/ft
Area (A)68.7 in²
Ix4100 in⁴
Sx410 in³
Zx486 in³
rx7.72 in
Iy4100 in⁴
Sy410 in³
Zy486 in³
ry7.72 in
J6600 in⁴

Other HSS20×20 sizes

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

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

All HSS20×20 sizes and dimensions →

Similar weight HSS shapes

Comparable 249.85 lb/ft sections in other HSS tube sizes.

HSS30×10×1249.85 lb/ft · Sx 460 in³HSS28.000×0.875253.72 lb/ft · Sx 459 in³HSS24.000×1.000245.87 lb/ft · Sx 374 in³HSS34×10×7/8244.88 lb/ft · Sx 506 in³HSS22×22×7/8244.88 lb/ft · Sx 452 in³HSS24×12×1222.63 lb/ft · Sx 362 in³HSS18×18×1222.63 lb/ft · Sx 324 in³HSS34×10×1277.07 lb/ft · Sx 565 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 HSS20×20×1 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: HSS tube · Steel Beam Size Chart

Interactive drawing