S12×35 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.

S12×35 measures 12 in. deep with a 5 1/8 in. flange, on a 7/16 in. web and 9/16 in. flanges.

At 35 lb per foot it is one of the 4 S12 sizes, which run from 31.8 to 50 lb/ft.

For strong-axis bending its section modulus is Sx = 38.1 in³ and its moment of inertia Ix = 228 in⁴, with a plastic modulus Zx = 44.6 in³.

Detailing dimensions

Depth (d)12"
Flange width (bf)5 1/8"
Web thickness (tw)7/16"
Flange thickness (tf)9/16"
k (detailing)1 3/16"
Workable gage (g)3"

Section properties

Weight35 lb/ft
Area (A)10.2 in²
Ix228 in⁴
Sx38.1 in³
Zx44.6 in³
rx4.72 in
Iy9.84 in⁴
Sy3.88 in³
Zy6.8 in³
ry0.98 in
J1.05 in⁴

Other S12 sizes

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

S12×31.8S12×40.8S12×50

Similar weight standard beams

Comparable 35 lb/ft sections in other standard beam sizes.

S10×3535 lb/ft · Sx 29.4 in³S15×42.942.9 lb/ft · Sx 59.4 in³S10×25.425.4 lb/ft · Sx 24.6 in³S8×2323 lb/ft · Sx 16.2 in³S15×5050 lb/ft · Sx 64.7 in³S8×18.418.4 lb/ft · Sx 14.4 in³S6×17.2517.25 lb/ft · Sx 8.74 in³S18×54.754.7 lb/ft · Sx 89 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 S12×35 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Standard beams · Steel Beam Size Chart

Interactive drawing