HSS18×6×5/8 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.

HSS18×6×5/8 is a rectangular tube 18 in. by 6 in. with a 5/8 in. nominal wall.

At 93.34 lb per foot it is one of the 6 HSS18×6 sizes, which run from 39.43 to 109.91 lb/ft.

For strong-axis bending its section modulus is Sx = 103 in³ and its moment of inertia Ix = 923 in⁴, with a plastic modulus Zx = 135 in³.

Detailing dimensions

Depth (Ht)18"
Width (B)6"
Nominal wall (t)5/8"

Section properties

Weight93.34 lb/ft
Area (A)25.7 in²
Ix923 in⁴
Sx103 in³
Zx135 in³
rx6 in
Iy158 in⁴
Sy52.7 in³
Zy61 in³
ry2.48 in
J462 in⁴

Other HSS18×6 sizes

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

HSS18×6×1/4HSS18×6×5/16HSS18×6×3/8HSS18×6×1/2HSS18×6×3/4

All HSS18×6 sizes and dimensions →

Similar weight HSS shapes

Comparable 93.34 lb/ft sections in other HSS tube sizes.

HSS16×8×5/893.34 lb/ft · Sx 102 in³HSS14×10×5/893.34 lb/ft · Sx 98.2 in³HSS12×12×5/893.34 lb/ft · Sx 91.4 in³HSS18.000×0.50093.54 lb/ft · Sx 109 in³HSS24×14×3/893.83 lb/ft · Sx 171 in³HSS22×16×3/893.83 lb/ft · Sx 167 in³HSS24.000×0.37594.71 lb/ft · Sx 151 in³HSS24×20×5/1691.39 lb/ft · Sx 186 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 HSS18×6×5/8 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: HSS tube · Steel Beam Size Chart

Interactive drawing