2L3-1/2×3×7/16×3/4LLBB 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.

2L3-1/2×3×7/16×3/4LLBB has a 3 1/2 in. long leg and a 3 in. short leg, 7/16 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 = 2.58 in³ and its moment of inertia Ix = 6.2 in⁴, with a plastic modulus Zx = 4.64 in³.

Detailing dimensions

Long leg3 1/2"
Short leg3"
Thickness (t)7/16"

Section properties

Weight18.2 lb/ft
Area (A)5.34 in²
Ix6.2 in⁴
Sx2.58 in³
Zx4.64 in³
rx1.08 in
Iy12.2 in⁴
Sy3.61 in³
Zy6.52 in³
ry1.51 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 in³2L4×3-1/2×3/8×3/4LLBB18.2 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 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 2L3-1/2×3×7/16×3/4LLBB cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Double angles · Steel Beam Size Chart

Interactive drawing