M4×6 junior beam

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.

M4×6 measures 3 3/4 in. deep with a 3 3/4 in. flange, on a 1/8 in. web and 3/16 in. flanges.

At 6 lb per foot it is the heaviest of the 2 M4 sizes, which run from 4.08 to 6 lb/ft.

For strong-axis bending its section modulus is Sx = 2.48 in³ and its moment of inertia Ix = 4.72 in⁴, with a plastic modulus Zx = 2.74 in³.

Detailing dimensions

Depth (d)3 3/4"
Flange width (bf)3 3/4"
Web thickness (tw)1/8"
Flange thickness (tf)3/16"
k (detailing)1/2"

Section properties

Weight6 lb/ft
Area (A)1.75 in²
Ix4.72 in⁴
Sx2.48 in³
Zx2.74 in³
rx1.64 in
Iy1.47 in⁴
Sy0.771 in³
Zy1.18 in³
ry0.915 in
J0.0184 in⁴

Other M4 sizes

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

M4×4.08

Similar weight junior beams

Comparable 6 lb/ft sections in other junior beam sizes.

M8×6.26.2 lb/ft · Sx 4.39 in³M8×6.56.5 lb/ft · Sx 4.63 in³M10×7.57.5 lb/ft · Sx 6.6 in³M6×4.44.4 lb/ft · Sx 2.41 in³M10×88 lb/ft · Sx 6.95 in³M6×3.73.7 lb/ft · Sx 2.01 in³M10×99 lb/ft · Sx 7.79 in³M3×2.92.9 lb/ft · Sx 1 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 M4×6 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Junior beams · Steel Beam Size Chart

Interactive drawing