2L4×4×3/4×3/4 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.

2L4×4×3/4×3/4 has equal 4 in. legs, 3/4 in. thick, spaced 3/4 in. back to back.

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

For strong-axis bending its section modulus is Sx = 5.58 in³ and its moment of inertia Ix = 15.2 in⁴, with a plastic modulus Zx = 10 in³.

Detailing dimensions

Long leg4"
Short leg4"
Thickness (t)3/4"

Section properties

Weight37 lb/ft
Area (A)10.9 in²
Ix15.2 in⁴
Sx5.58 in³
Zx10 in³
rx1.18 in
Iy44.9 in⁴
Sy10.3 in³
Zy17.9 in³
ry2.03 in

Other 2L4×4 sizes

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

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

All 2L4×4 sizes and dimensions →

Similar weight double angles

Comparable 37 lb/ft sections in other double angle sizes.

2L6×4×9/16LLBB36.2 lb/ft · Sx 9.62 in³2L6×4×9/16×3/8LLBB36.2 lb/ft · Sx 9.62 in³2L6×4×9/16×3/4LLBB36.2 lb/ft · Sx 9.62 in³2L6×4×9/16SLBB36.2 lb/ft · Sx 4.58 in³2L6×4×9/16×3/8SLBB36.2 lb/ft · Sx 4.58 in³2L6×4×9/16×3/4SLBB36.2 lb/ft · Sx 4.58 in³2L7×4×1/2LLBB35.8 lb/ft · Sx 11.6 in³2L7×4×1/2×3/8LLBB35.8 lb/ft · Sx 11.6 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 2L4×4×3/4×3/4 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Double angles · Steel Beam Size Chart

Interactive drawing