S15×50 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.

S15×50 measures 15 in. deep with a 5 5/8 in. flange, on a 9/16 in. web and 5/8 in. flanges.

At 50 lb per foot it is the heaviest of the 2 S15 sizes, which run from 42.9 to 50 lb/ft.

For strong-axis bending its section modulus is Sx = 64.7 in³ and its moment of inertia Ix = 485 in⁴, with a plastic modulus Zx = 77 in³.

Detailing dimensions

Depth (d)15"
Flange width (bf)5 5/8"
Web thickness (tw)9/16"
Flange thickness (tf)5/8"
k (detailing)1 3/8"
Workable gage (g)3 1/2"

Section properties

Weight50 lb/ft
Area (A)14.7 in²
Ix485 in⁴
Sx64.7 in³
Zx77 in³
rx5.75 in
Iy15.6 in⁴
Sy5.53 in³
Zy10 in³
ry1.03 in
J2.12 in⁴

Other S15 sizes

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

S15×42.9

Similar weight standard beams

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

S12×5050 lb/ft · Sx 50.6 in³S18×54.754.7 lb/ft · Sx 89 in³S12×40.840.8 lb/ft · Sx 45.1 in³S12×3535 lb/ft · Sx 38.1 in³S10×3535 lb/ft · Sx 29.4 in³S20×6666 lb/ft · Sx 119 in³S12×31.831.8 lb/ft · Sx 36.2 in³S18×7070 lb/ft · Sx 103 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 S15×50 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Standard beams · Steel Beam Size Chart

Interactive drawing