2L4×3-1/2×1/4×3/8LLBB 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.

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

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

It weighs 12.4 lb per foot.

For strong-axis bending its section modulus is Sx = 2.02 in³ and its moment of inertia Ix = 5.78 in⁴, with a plastic modulus Zx = 3.62 in³.

Detailing dimensions

Long leg4"
Short leg3 1/2"
Thickness (t)1/4"

Section properties

Weight12.4 lb/ft
Area (A)3.64 in²
Ix5.78 in⁴
Sx2.02 in³
Zx3.62 in³
rx1.26 in
Iy8.41 in⁴
Sy2.28 in³
Zy3.95 in³
ry1.52 in

Similar weight double angles

Comparable 12.4 lb/ft sections in other double angle sizes.

2L4×3-1/2×1/4LLBB12.4 lb/ft · Sx 2.02 in³2L4×3-1/2×1/4×3/4LLBB12.4 lb/ft · Sx 2.02 in³2L4×3-1/2×1/4SLBB12.4 lb/ft · Sx 1.59 in³2L4×3-1/2×1/4×3/8SLBB12.4 lb/ft · Sx 1.59 in³2L4×3-1/2×1/4×3/4SLBB12.4 lb/ft · Sx 1.59 in³2L3×3×5/1612.2 lb/ft · Sx 1.4 in³2L3×3×5/16×3/812.2 lb/ft · Sx 1.4 in³2L3×3×5/16×3/412.2 lb/ft · Sx 1.4 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 2L4×3-1/2×1/4×3/8LLBB cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Double angles · Steel Beam Size Chart

Interactive drawing