S12×50 standard 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.

S12×50 measures 12 in. deep with a 5 1/2 in. flange, on a 11/16 in. web and 11/16 in. flanges.

At 50 lb per foot it is the heaviest of the 4 S12 sizes, which run from 31.8 to 50 lb/ft.

For strong-axis bending its section modulus is Sx = 50.6 in³ and its moment of inertia Ix = 303 in⁴, with a plastic modulus Zx = 60.9 in³.

Detailing dimensions

Depth (d)12"
Flange width (bf)5 1/2"
Web thickness (tw)11/16"
Flange thickness (tf)11/16"
k (detailing)1 7/16"
Workable gage (g)3"

Section properties

Weight50 lb/ft
Area (A)14.7 in²
Ix303 in⁴
Sx50.6 in³
Zx60.9 in³
rx4.55 in
Iy15.6 in⁴
Sy5.69 in³
Zy10.3 in³
ry1.03 in
J2.77 in⁴

Other S12 sizes

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

S12×31.8S12×35S12×40.8

Similar weight standard beams

Comparable 50 lb/ft sections in other standard beam sizes.

S15×5050 lb/ft · Sx 64.7 in³S18×54.754.7 lb/ft · Sx 89 in³S15×42.942.9 lb/ft · Sx 59.4 in³S10×3535 lb/ft · Sx 29.4 in³S20×6666 lb/ft · Sx 119 in³S18×7070 lb/ft · Sx 103 in³S10×25.425.4 lb/ft · Sx 24.6 in³S20×7575 lb/ft · Sx 128 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 S12×50 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Standard beams · Steel Beam Size Chart

Interactive drawing