M12×10 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.

M12×10 measures 12 in. deep with a 3 1/4 in. flange, on a 1/8 in. web and 3/16 in. flanges.

At 10 lb per foot it is the lightest of the 3 M12 sizes, which run from 10 to 11.8 lb/ft.

For strong-axis bending its section modulus is Sx = 10.3 in³ and its moment of inertia Ix = 61.7 in⁴, with a plastic modulus Zx = 12.2 in³.

Detailing dimensions

Depth (d)12"
Flange width (bf)3 1/4"
Web thickness (tw)1/8"
Flange thickness (tf)3/16"
k (detailing)1/2"

Section properties

Weight10 lb/ft
Area (A)2.95 in²
Ix61.7 in⁴
Sx10.3 in³
Zx12.2 in³
rx4.57 in
Iy1.03 in⁴
Sy0.636 in³
Zy1.02 in³
ry0.592 in
J0.0292 in⁴

Other M12 sizes

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

M12×10.8M12×11.8

Similar weight junior beams

Comparable 10 lb/ft sections in other junior beam sizes.

M10×99 lb/ft · Sx 7.79 in³M12.5×11.611.6 lb/ft · Sx 12.8 in³M10×88 lb/ft · Sx 6.95 in³M12.5×12.412.4 lb/ft · Sx 14.2 in³M10×7.57.5 lb/ft · Sx 6.6 in³M8×6.56.5 lb/ft · Sx 4.63 in³M8×6.26.2 lb/ft · Sx 4.39 in³M4×66 lb/ft · Sx 2.48 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 M12×10 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Junior beams · Steel Beam Size Chart

Interactive drawing