2L6×4×7/8LLBB 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.

2L6×4×7/8LLBB has a 6 in. long leg and a 4 in. short leg, 7/8 in. thick, in contact back to back.

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

At 54.4 lb per foot it is one of the 48 2L6×4 sizes, which run from 20.6 to 54.4 lb/ft.

For strong-axis bending its section modulus is Sx = 14.3 in³ and its moment of inertia Ix = 55.4 in⁴, with a plastic modulus Zx = 25.4 in³.

Detailing dimensions

Long leg6"
Short leg4"
Thickness (t)7/8"

Section properties

Weight54.4 lb/ft
Area (A)16 in²
Ix55.4 in⁴
Sx14.3 in³
Zx25.4 in³
rx1.86 in
Iy39.4 in⁴
Sy9.85 in³
Zy17.9 in³
ry1.57 in

Other 2L6×4 sizes

Same nominal size, different weight — useful when you are checking a substitution or a lighter section.

2L6×4×5/16LLBB2L6×4×5/16×3/8LLBB2L6×4×5/16×3/4LLBB2L6×4×5/16SLBB2L6×4×5/16×3/8SLBB2L6×4×5/16×3/4SLBB2L6×4×3/8LLBB2L6×4×3/8×3/8LLBB2L6×4×3/8×3/4LLBB2L6×4×3/8SLBB2L6×4×3/8×3/8SLBB2L6×4×3/8×3/4SLBB2L6×4×7/16LLBB2L6×4×7/16×3/8LLBB2L6×4×7/16×3/4LLBB2L6×4×7/16SLBB2L6×4×7/16×3/8SLBB2L6×4×7/16×3/4SLBB2L6×4×1/2LLBB2L6×4×1/2×3/8LLBB2L6×4×1/2×3/4LLBB2L6×4×1/2SLBB2L6×4×1/2×3/8SLBB2L6×4×1/2×3/4SLBB

All 2L6×4 sizes and dimensions →

Similar weight double angles

Comparable 54.4 lb/ft sections in other double angle sizes.

2L5×5×7/854.4 lb/ft · Sx 10.3 in³2L5×5×7/8×3/854.4 lb/ft · Sx 10.3 in³2L5×5×7/8×3/454.4 lb/ft · Sx 10.3 in³2L8×8×1/252.8 lb/ft · Sx 16.7 in³2L8×8×1/2×3/852.8 lb/ft · Sx 16.7 in³2L8×8×1/2×3/452.8 lb/ft · Sx 16.7 in³2L7×4×3/4LLBB52.4 lb/ft · Sx 16.8 in³2L7×4×3/4×3/8LLBB52.4 lb/ft · Sx 16.8 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 2L6×4×7/8LLBB cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Double angles · Steel Beam Size Chart

Interactive drawing