2L3-1/2×3×1/2SLBB 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.

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

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

It weighs 20.4 lb per foot.

For strong-axis bending its section modulus is Sx = 2.18 in³ and its moment of inertia Ix = 4.65 in⁴, with a plastic modulus Zx = 3.94 in³.

Detailing dimensions

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

Section properties

Weight20.4 lb/ft
Area (A)6.04 in²
Ix4.65 in⁴
Sx2.18 in³
Zx3.94 in³
rx0.877 in
Iy14.5 in⁴
Sy4.14 in³
Zy6.76 in³
ry1.55 in

Similar weight double angles

Comparable 20.4 lb/ft sections in other double angle sizes.

2L3-1/2×3×1/2LLBB20.4 lb/ft · Sx 2.9 in³2L3-1/2×3×1/2×3/8LLBB20.4 lb/ft · Sx 2.9 in³2L3-1/2×3×1/2×3/4LLBB20.4 lb/ft · Sx 2.9 in³2L3-1/2×3×1/2×3/8SLBB20.4 lb/ft · Sx 2.18 in³2L3-1/2×3×1/2×3/4SLBB20.4 lb/ft · Sx 2.18 in³2L5×5×5/1620.6 lb/ft · Sx 4.08 in³2L5×5×5/16×3/820.6 lb/ft · Sx 4.08 in³2L5×5×5/16×3/420.6 lb/ft · Sx 4.08 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 2L3-1/2×3×1/2SLBB cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Double angles · Steel Beam Size Chart

Interactive drawing