L4×4×3/8 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.

L4×4×3/8 has equal 4 in. legs, 3/8 in. thick.

At 9.8 lb per foot it is one of the 7 L4×4 sizes, which run from 6.6 to 18.5 lb/ft.

For strong-axis bending its section modulus is Sx = 1.5 in³ and its moment of inertia Ix = 4.32 in⁴, with a plastic modulus Zx = 2.69 in³.

Detailing dimensions

Long leg4"
Short leg4"
Thickness (t)3/8"
k (detailing)3/4"

Section properties

Weight9.8 lb/ft
Area (A)2.86 in²
Ix4.32 in⁴
Sx1.5 in³
Zx2.69 in³
rx1.23 in
Iy4.32 in⁴
Sy1.5 in³
Zy2.69 in³
ry1.23 in
J0.141 in⁴

Other L4×4 sizes

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

L4×4×1/4L4×4×5/16L4×4×7/16L4×4×1/2L4×4×5/8L4×4×3/4

All L4×4 sizes and dimensions →

Similar weight angles

Comparable 9.8 lb/ft sections in other angle sizes.

L6×3-1/2×5/169.8 lb/ft · Sx 2.72 in³L5×3×3/89.8 lb/ft · Sx 2.22 in³L3-1/2×3-1/2×7/169.8 lb/ft · Sx 1.32 in³L3-1/2×3×1/210.2 lb/ft · Sx 1.45 in³L3-1/2×2-1/2×1/29.4 lb/ft · Sx 1.41 in³L3×3×1/29.4 lb/ft · Sx 1.06 in³L6×4×5/1610.3 lb/ft · Sx 2.77 in³L5×5×5/1610.3 lb/ft · Sx 2.04 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 L4×4×3/8 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Angles · Steel Beam Size Chart

Interactive drawing