2L4×3-1/2×3/8×3/4LLBB double angle

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.

2L4×3-1/2×3/8×3/4LLBB has a 4 in. long leg and a 3 1/2 in. short leg, 3/8 in. thick, in contact back to back.

It is a double angle set with its long legs back-to-back.

It weighs 18.2 lb per foot.

For strong-axis bending its section modulus is Sx = 2.96 in³ and its moment of inertia Ix = 8.3 in⁴, with a plastic modulus Zx = 5.32 in³.

Detailing dimensions

Long leg4"
Short leg3 1/2"
Thickness (t)3/8"

Section properties

Weight18.2 lb/ft
Area (A)5.36 in²
Ix8.3 in⁴
Sx2.96 in³
Zx5.32 in³
rx1.25 in
Iy15.3 in⁴
Sy3.95 in³
Zy7.09 in³
ry1.69 in

Similar weight double angles

Comparable 18.2 lb/ft sections in other double angle sizes.

2L4×3-1/2×3/8LLBB18.2 lb/ft · Sx 2.96 in³2L4×3-1/2×3/8×3/8LLBB18.2 lb/ft · Sx 2.96 in³2L3-1/2×3×7/16LLBB18.2 lb/ft · Sx 2.58 in³2L3-1/2×3×7/16×3/8LLBB18.2 lb/ft · Sx 2.58 in³2L3-1/2×3×7/16×3/4LLBB18.2 lb/ft · Sx 2.58 in³2L4×3-1/2×3/8SLBB18.2 lb/ft · Sx 2.32 in³2L4×3-1/2×3/8×3/8SLBB18.2 lb/ft · Sx 2.32 in³2L4×3-1/2×3/8×3/4SLBB18.2 lb/ft · Sx 2.32 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 2L4×3-1/2×3/8×3/4LLBB cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Double angles · Steel Beam Size Chart

Interactive drawing