2L3×2-1/2×1/2LLBB 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.

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

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

It weighs 17 lb per foot.

For strong-axis bending its section modulus is Sx = 2.06 in³ and its moment of inertia Ix = 4.14 in⁴, with a plastic modulus Zx = 3.72 in³.

Detailing dimensions

Long leg3"
Short leg2 1/2"
Thickness (t)1/2"

Section properties

Weight17 lb/ft
Area (A)5 in²
Ix4.14 in⁴
Sx2.06 in³
Zx3.72 in³
rx0.91 in
Iy5.41 in⁴
Sy2.16 in³
Zy3.73 in³
ry1.04 in

Similar weight double angles

Comparable 17 lb/ft sections in other double angle sizes.

2L3-1/2×3-1/2×3/817 lb/ft · Sx 2.3 in³2L3-1/2×3-1/2×3/8×3/817 lb/ft · Sx 2.3 in³2L3-1/2×3-1/2×3/8×3/417 lb/ft · Sx 2.3 in³2L4×3×3/8LLBB17 lb/ft · Sx 2.88 in³2L4×3×3/8×3/8LLBB17 lb/ft · Sx 2.88 in³2L4×3×3/8×3/4LLBB17 lb/ft · Sx 2.88 in³2L3×2-1/2×1/2×3/8LLBB17 lb/ft · Sx 2.06 in³2L3×2-1/2×1/2×3/4LLBB17 lb/ft · Sx 2.06 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 2L3×2-1/2×1/2LLBB cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Double angles · Steel Beam Size Chart

Interactive drawing