HSS20×4×3/8 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.

HSS20×4×3/8 is a rectangular tube 20 in. by 4 in. with a 3/8 in. nominal wall.

At 58.1 lb per foot it is one 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 = 65.7 in³ and its moment of inertia Ix = 657 in⁴, with a plastic modulus Zx = 89.3 in³.

Detailing dimensions

Depth (Ht)20"
Width (B)4"
Nominal wall (t)3/8"

Section properties

Weight58.1 lb/ft
Area (A)16 in²
Ix657 in⁴
Sx65.7 in³
Zx89.3 in³
rx6.42 in
Iy47.6 in⁴
Sy23.8 in³
Zy26.8 in³
ry1.73 in
J156 in⁴

Other HSS20×4 sizes

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

HSS20×4×1/4HSS20×4×5/16HSS20×4×1/2

All HSS20×4 sizes and dimensions →

Similar weight HSS shapes

Comparable 58.1 lb/ft sections in other HSS tube sizes.

HSS18×6×3/858.1 lb/ft · Sx 66.9 in³HSS16×8×3/858.1 lb/ft · Sx 66.3 in³HSS14×10×3/858.1 lb/ft · Sx 63.9 in³HSS12×12×3/858.1 lb/ft · Sx 59.5 in³HSS20×8×5/1657.36 lb/ft · Sx 78.6 in³HSS18×10×5/1657.36 lb/ft · Sx 77.2 in³HSS16×12×5/1657.36 lb/ft · Sx 74.4 in³HSS14×14×5/1657.36 lb/ft · Sx 69.9 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 HSS20×4×3/8 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: HSS tube · Steel Beam Size Chart

Interactive drawing