2L4×4×5/16 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.

2L4×4×5/16 has equal 4 in. legs, 5/16 in. thick, in contact back to back.

At 16.4 lb per foot it is one of the 21 2L4×4 sizes, which run from 13.2 to 37 lb/ft.

For strong-axis bending its section modulus is Sx = 2.54 in³ and its moment of inertia Ix = 7.34 in⁴, with a plastic modulus Zx = 4.52 in³.

Detailing dimensions

Long leg4"
Short leg4"
Thickness (t)5/16"

Section properties

Weight16.4 lb/ft
Area (A)4.8 in²
Ix7.34 in⁴
Sx2.54 in³
Zx4.52 in³
rx1.24 in
Iy13.2 in⁴
Sy3.3 in³
Zy5.33 in³
ry1.66 in

Other 2L4×4 sizes

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

2L4×4×1/42L4×4×1/4×3/82L4×4×1/4×3/42L4×4×5/16×3/82L4×4×5/16×3/42L4×4×3/82L4×4×3/8×3/82L4×4×3/8×3/42L4×4×7/162L4×4×7/16×3/82L4×4×7/16×3/42L4×4×1/22L4×4×1/2×3/82L4×4×1/2×3/42L4×4×5/82L4×4×5/8×3/82L4×4×5/8×3/42L4×4×3/42L4×4×3/4×3/82L4×4×3/4×3/4

All 2L4×4 sizes and dimensions →

Similar weight double angles

Comparable 16.4 lb/ft sections in other double angle sizes.

2L5×3×5/16LLBB16.4 lb/ft · Sx 3.74 in³2L5×3×5/16×3/8LLBB16.4 lb/ft · Sx 3.74 in³2L5×3×5/16×3/4LLBB16.4 lb/ft · Sx 3.74 in³2L5×3×5/16SLBB16.4 lb/ft · Sx 1.48 in³2L5×3×5/16×3/8SLBB16.4 lb/ft · Sx 1.48 in³2L5×3×5/16×3/4SLBB16.4 lb/ft · Sx 1.48 in³2L3×3×7/1616.6 lb/ft · Sx 1.89 in³2L3×3×7/16×3/816.6 lb/ft · Sx 1.89 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 2L4×4×5/16 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Double angles · Steel Beam Size Chart

Interactive drawing