2L3-1/2×3×5/16LLBB 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.

2L3-1/2×3×5/16LLBB has a 3 1/2 in. long leg and a 3 in. short leg, 5/16 in. thick, in contact back to back.

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

It weighs 13.2 lb per foot.

For strong-axis bending its section modulus is Sx = 1.9 in³ and its moment of inertia Ix = 4.66 in⁴, with a plastic modulus Zx = 3.44 in³.

Detailing dimensions

Long leg3 1/2"
Short leg3"
Thickness (t)5/16"

Section properties

Weight13.2 lb/ft
Area (A)3.9 in²
Ix4.66 in⁴
Sx1.9 in³
Zx3.44 in³
rx1.09 in
Iy5.62 in⁴
Sy1.87 in³
Zy3.11 in³
ry1.2 in

Similar weight double angles

Comparable 13.2 lb/ft sections in other double angle sizes.

2L4×4×1/413.2 lb/ft · Sx 2.06 in³2L4×4×1/4×3/813.2 lb/ft · Sx 2.06 in³2L4×4×1/4×3/413.2 lb/ft · Sx 2.06 in³2L5×3×1/4LLBB13.2 lb/ft · Sx 3.02 in³2L5×3×1/4×3/8LLBB13.2 lb/ft · Sx 3.02 in³2L5×3×1/4×3/4LLBB13.2 lb/ft · Sx 3.02 in³2L3-1/2×3×5/16×3/8LLBB13.2 lb/ft · Sx 1.9 in³2L3-1/2×3×5/16×3/4LLBB13.2 lb/ft · Sx 1.9 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 2L3-1/2×3×5/16LLBB cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Double angles · Steel Beam Size Chart

Interactive drawing