ST12×50 tee (cut from a 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.

ST12×50 measures 12 in. deep with a 7 1/4 in. flange, on a 3/4 in. web and 7/8 in. flanges.

At 50 lb per foot it is one of the 5 ST12 sizes, which run from 40 to 60.5 lb/ft.

For strong-axis bending its section modulus is Sx = 26.3 in³ and its moment of inertia Ix = 215 in⁴, with a plastic modulus Zx = 47.5 in³.

Detailing dimensions

Depth (d)12"
Flange width (bf)7 1/4"
Web thickness (tw)3/4"
Flange thickness (tf)7/8"
k (detailing)1 3/4"
Workable gage (g)4"

Section properties

Weight50 lb/ft
Area (A)14.7 in²
Ix215 in⁴
Sx26.3 in³
Zx47.5 in³
rx3.83 in
Iy23.7 in⁴
Sy6.55 in³
Zy12 in³
ry1.27 in
J3.76 in⁴

Other ST12 sizes

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

ST12×40ST12×45ST12×53ST12×60.5

All ST12 sizes and dimensions →

Similar weight structural tees

Comparable 50 lb/ft sections in other tee sizes.

WT8×5050 lb/ft · Sx 11.4 in³WT5×5050 lb/ft · Sx 5.56 in³WT15×49.549.5 lb/ft · Sx 30 in³WT7×49.549.5 lb/ft · Sx 6.88 in³WT10.5×50.550.5 lb/ft · Sx 15.8 in³WT13.5×5151 lb/ft · Sx 25.3 in³WT9×48.548.5 lb/ft · Sx 12.7 in³WT12×51.551.5 lb/ft · Sx 22 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 ST12×50 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Tees · Steel Beam Size Chart

Interactive drawing