WT8×18 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.
WT8×18 measures 7 7/8 in. deep with a 7 in. flange, on a 5/16 in. web and 7/16 in. flanges.
At 18 lb per foot it is one of the 11 WT8 sizes, which run from 13 to 50 lb/ft.
For strong-axis bending its section modulus is Sx = 5.05 in³ and its moment of inertia Ix = 30.6 in⁴, with a plastic modulus Zx = 8.93 in³.
Detailing dimensions
| Depth (d) | 7 7/8" |
|---|---|
| Flange width (bf) | 7" |
| Web thickness (tw) | 5/16" |
| Flange thickness (tf) | 7/16" |
| k (detailing) | 1 1/8" |
| Workable gage (g) | 3 1/2" |
Section properties
| Weight | 18 lb/ft |
|---|---|
| Area (A) | 5.29 in² |
| Ix | 30.6 in⁴ |
| Sx | 5.05 in³ |
| Zx | 8.93 in³ |
| rx | 2.41 in |
| Iy | 12.2 in⁴ |
| Sy | 3.5 in³ |
| Zy | 5.42 in³ |
| ry | 1.52 in |
| J | 0.272 in⁴ |
Other WT8 sizes
Same nominal size, different weight — useful when you are checking a substitution or a lighter section.
All WT8 sizes and dimensions →
Similar weight structural tees
Comparable 18 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 WT8×18 cut, formed, or fabricated? Huntington Steel & Supply Co.
Browse more: Tees · Steel Beam Size Chart