HSS20×8×5/8 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.

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

At 110.36 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 = 144 in³ and its moment of inertia Ix = 1440 in⁴, with a plastic modulus Zx = 185 in³.

Detailing dimensions

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

Section properties

Weight110.36 lb/ft
Area (A)30.3 in²
Ix1440 in⁴
Sx144 in³
Zx185 in³
rx6.89 in
Iy338 in⁴
Sy84.6 in³
Zy96.4 in³
ry3.34 in
J916 in⁴

Other HSS20×8 sizes

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

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

All HSS20×8 sizes and dimensions →

Similar weight HSS shapes

Comparable 110.36 lb/ft sections in other HSS tube sizes.

HSS18×10×5/8110.36 lb/ft · Sx 142 in³HSS16×12×5/8110.36 lb/ft · Sx 136 in³HSS14×14×5/8110.36 lb/ft · Sx 128 in³HSS28.000×0.375110.74 lb/ft · Sx 207 in³HSS18×6×3/4109.91 lb/ft · Sx 118 in³HSS16×8×3/4109.91 lb/ft · Sx 117 in³HSS14×10×3/4109.91 lb/ft · Sx 113 in³HSS12×12×3/4109.91 lb/ft · Sx 105 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 HSS20×8×5/8 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: HSS tube · Steel Beam Size Chart

Interactive drawing