HSS20×20×5/8 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.

HSS20×20×5/8 is a square tube 20 in. by 20 in. with a 5/8 in. nominal wall.

At 161.4 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 = 275 in³ and its moment of inertia Ix = 2750 in⁴, with a plastic modulus Zx = 320 in³.

Detailing dimensions

Depth (Ht)20"
Width (B)20"
Nominal wall (t)5/8"

Section properties

Weight161.4 lb/ft
Area (A)44.3 in²
Ix2750 in⁴
Sx275 in³
Zx320 in³
rx7.88 in
Iy2750 in⁴
Sy275 in³
Zy320 in³
ry7.88 in
J4320 in⁴

Other HSS20×20 sizes

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

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

All HSS20×20 sizes and dimensions →

Similar weight HSS shapes

Comparable 161.4 lb/ft sections in other HSS tube sizes.

HSS30×10×5/8161.4 lb/ft · Sx 310 in³HSS24×16×5/8161.4 lb/ft · Sx 298 in³HSS22×18×5/8161.4 lb/ft · Sx 288 in³HSS16.000×1.000160.35 lb/ft · Sx 157 in³HSS18.000×0.875160.19 lb/ft · Sx 181 in³HSS24.000×0.625156.18 lb/ft · Sx 244 in³HSS20×8×1168.18 lb/ft · Sx 206 in³HSS16×12×1168.18 lb/ft · Sx 196 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 HSS20×20×5/8 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: HSS tube · Steel Beam Size Chart

Interactive drawing