HSS18×6×1/2 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.

HSS18×6×1/2 is a rectangular tube 18 in. by 6 in. with a 1/2 in. nominal wall.

At 76.07 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 = 85.6 in³ and its moment of inertia Ix = 770 in⁴, with a plastic modulus Zx = 112 in³.

Detailing dimensions

Depth (Ht)18"
Width (B)6"
Nominal wall (t)1/2"

Section properties

Weight76.07 lb/ft
Area (A)20.9 in²
Ix770 in⁴
Sx85.6 in³
Zx112 in³
rx6.07 in
Iy134 in⁴
Sy44.6 in³
Zy50.7 in³
ry2.53 in
J387 in⁴

Other HSS18×6 sizes

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

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

All HSS18×6 sizes and dimensions →

Similar weight HSS shapes

Comparable 76.07 lb/ft sections in other HSS tube sizes.

HSS20×4×1/276.07 lb/ft · Sx 83.8 in³HSS16×8×1/276.07 lb/ft · Sx 84.9 in³HSS14×10×1/276.07 lb/ft · Sx 81.8 in³HSS12×12×1/276.07 lb/ft · Sx 76.2 in³HSS12.000×0.62576 lb/ft · Sx 56.8 in³HSS16×4×5/876.33 lb/ft · Sx 67.3 in³HSS14×6×5/876.33 lb/ft · Sx 68.3 in³HSS12×8×5/876.33 lb/ft · Sx 66.1 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 HSS18×6×1/2 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: HSS tube · Steel Beam Size Chart

Interactive drawing