HSS20×8×7/8 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.

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

At 149.61 lb per foot it is one of the 7 HSS20×8 sizes, which run from 57.36 to 168.18 lb/ft.

For strong-axis bending its section modulus is Sx = 188 in³ and its moment of inertia Ix = 1880 in⁴, with a plastic modulus Zx = 246 in³.

Detailing dimensions

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

Section properties

Weight149.61 lb/ft
Area (A)41.2 in²
Ix1880 in⁴
Sx188 in³
Zx246 in³
rx6.74 in
Iy432 in⁴
Sy108 in³
Zy127 in³
ry3.24 in
J1200 in⁴

Other HSS20×8 sizes

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

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

All HSS20×8 sizes and dimensions →

Similar weight HSS shapes

Comparable 149.61 lb/ft sections in other HSS tube sizes.

HSS16×12×7/8149.61 lb/ft · Sx 178 in³HSS14×14×7/8149.61 lb/ft · Sx 167 in³HSS20×12×3/4150.75 lb/ft · Sx 219 in³HSS16×16×3/4150.75 lb/ft · Sx 199 in³HSS28.000×0.500146.99 lb/ft · Sx 272 in³HSS24×14×5/8152.89000000000001 lb/ft · Sx 272 in³HSS22×16×5/8152.89000000000001 lb/ft · Sx 264 in³HSS20.000×0.750154.34 lb/ft · Sx 197 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 HSS20×8×7/8 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: HSS tube · Steel Beam Size Chart

Interactive drawing