HSS20×20×7/8 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.

HSS20×20×7/8 is a square tube 20 in. by 20 in. with a 7/8 in. nominal wall.

At 221.06 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 = 367 in³ and its moment of inertia Ix = 3670 in⁴, with a plastic modulus Zx = 433 in³.

Detailing dimensions

Depth (Ht)20"
Width (B)20"
Nominal wall (t)7/8"

Section properties

Weight221.06 lb/ft
Area (A)60.8 in²
Ix3670 in⁴
Sx367 in³
Zx433 in³
rx7.77 in
Iy3670 in⁴
Sy367 in³
Zy433 in³
ry7.77 in
J5870 in⁴

Other HSS20×20 sizes

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

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

All HSS20×20 sizes and dimensions →

Similar weight HSS shapes

Comparable 221.06 lb/ft sections in other HSS tube sizes.

HSS30×10×7/8221.06 lb/ft · Sx 413 in³HSS24×12×1222.63 lb/ft · Sx 362 in³HSS18×18×1222.63 lb/ft · Sx 324 in³HSS28.000×0.750218.48 lb/ft · Sx 398 in³HSS24.000×0.875216.31 lb/ft · Sx 332 in³HSS34×10×3/4212 lb/ft · Sx 444 in³HSS24×20×3/4212 lb/ft · Sx 413 in³HSS22×22×3/4212 lb/ft · Sx 395 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 HSS20×20×7/8 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: HSS tube · Steel Beam Size Chart

Interactive drawing