HSS20×12×7/8 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.

HSS20×12×7/8 is a rectangular tube 20 in. by 12 in. with a 7/8 in. nominal wall.

At 173.43 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 = 248 in³ and its moment of inertia Ix = 2480 in⁴, with a plastic modulus Zx = 308 in³.

Detailing dimensions

Depth (Ht)20"
Width (B)12"
Nominal wall (t)7/8"

Section properties

Weight173.43 lb/ft
Area (A)47.7 in²
Ix2480 in⁴
Sx248 in³
Zx308 in³
rx7.2 in
Iy1110 in⁴
Sy186 in³
Zy216 in³
ry4.83 in
J2530 in⁴

Other HSS20×12 sizes

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

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

All HSS20×12 sizes and dimensions →

Similar weight HSS shapes

Comparable 173.43 lb/ft sections in other HSS tube sizes.

HSS16×16×7/8173.43 lb/ft · Sx 225 in³HSS24×12×3/4171.16 lb/ft · Sx 287 in³HSS22×14×3/4171.16 lb/ft · Sx 281 in³HSS20×16×3/4171.16 lb/ft · Sx 271 in³HSS18×18×3/4171.16 lb/ft · Sx 258 in³HSS22.000×0.750170.37 lb/ft · Sx 241 in³HSS24×18×5/8169.91 lb/ft · Sx 325 in³HSS22×20×5/8169.91 lb/ft · Sx 313 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 HSS20×12×7/8 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: HSS tube · Steel Beam Size Chart

Interactive drawing