WT9×129 tee (cut from a wide-flange)
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.
WT9×129 measures 10 5/8 in. deep with a 11 3/4 in. flange, on a 1 1/4 in. web and 2 5/16 in. flanges.
At 129 lb per foot it is one of the 23 WT9 sizes, which run from 17.5 to 155.5 lb/ft.
For strong-axis bending its section modulus is Sx = 37 in³ and its moment of inertia Ix = 298 in⁴, with a plastic modulus Zx = 71 in³.
Detailing dimensions
| Depth (d) | 10 5/8" |
|---|---|
| Flange width (bf) | 11 3/4" |
| Web thickness (tw) | 1 1/4" |
| Flange thickness (tf) | 2 5/16" |
| k (detailing) | 3 3/16" |
| Workable gage (g) | 5 1/2" |
Section properties
| Weight | 129 lb/ft |
|---|---|
| Area (A) | 38 in² |
| Ix | 298 in⁴ |
| Sx | 37 in³ |
| Zx | 71 in³ |
| rx | 2.8 in |
| Iy | 314 in⁴ |
| Sy | 53.4 in³ |
| Zy | 83.1 in³ |
| ry | 2.88 in |
| J | 51.1 in⁴ |
Other WT9 sizes
Same nominal size, different weight — useful when you are checking a substitution or a lighter section.
All WT9 sizes and dimensions →
Similar weight structural tees
Comparable 129 lb/ft sections in other tee sizes.
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 WT9×129 cut, formed, or fabricated? Huntington Steel & Supply Co.
Browse more: Tees · Steel Beam Size Chart