HSS20×4×1/2 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.

HSS20×4×1/2 is a rectangular tube 20 in. by 4 in. with a 1/2 in. nominal wall.

At 76.07 lb per foot it is the heaviest of the 4 HSS20×4 sizes, which run from 39.43 to 76.07 lb/ft.

For strong-axis bending its section modulus is Sx = 83.8 in³ and its moment of inertia Ix = 838 in⁴, with a plastic modulus Zx = 115 in³.

Detailing dimensions

Depth (Ht)20"
Width (B)4"
Nominal wall (t)1/2"

Section properties

Weight76.07 lb/ft
Area (A)20.9 in²
Ix838 in⁴
Sx83.8 in³
Zx115 in³
rx6.33 in
Iy58.7 in⁴
Sy29.3 in³
Zy34 in³
ry1.68 in
J195 in⁴

Other HSS20×4 sizes

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

HSS20×4×1/4HSS20×4×5/16HSS20×4×3/8

All HSS20×4 sizes and dimensions →

Similar weight HSS shapes

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

HSS18×6×1/276.07 lb/ft · Sx 85.6 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 HSS20×4×1/2 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: HSS tube · Steel Beam Size Chart

Interactive drawing