WT8X18 Steel WT-shape — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 7.93 | 201.4 mm |
| Flange Width (bf) | 6.99 | 17.75 cm |
| Flange Thickness (tf) | 0.43 | 10.9 mm |
| Web Thickness (tw) | 0.295 | 7.5 mm |
| Area (A) | 5.29 in² | 34.1 cm² |
| Weight | 18 lb/ft | 26.8 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 30.6 | 12.2 | in⁴ |
| Elastic Section Modulus (S) | 5.05 | 3.5 | in³ |
| Plastic Section Modulus (Z) | 8.93 | 5.42 | in³ |
| Radius of Gyration (r) | 2.41 | 1.52 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 0.272 | in⁴ |
| Warping Constant (Cw) | 0.516 | in⁶ |
Design Resources
- Section Properties Database — Compare with other sections
- Steel Beam Sizes Reference — Full dimension table
- Steel Grades Reference — Material properties
Frequently Asked Questions
What is the weight of a WT8X18 tee? 18 lb/ft (26.8 kg/m).
What is the section modulus of WT8X18? Sx = 5.05 in³, Zx = 8.93 in³ (strong axis). Sy = 3.5 in³, Zy = 5.42 in³ (weak axis).
What steel grade is standard for WT8X18? ASTM A992 (Fy = 50 ksi, Fu = 65 ksi) for WT-shapes. Verify with mill certificate.
What is the moment of inertia of WT8X18? Ix = 30.6 in⁴ about the strong axis and Iy = 12.2 in⁴ about the weak axis. The radius of gyration is rx = 2.41 in and ry = 1.52 in.
Related Pages
Educational reference only. Verify all section properties against the current AISC Manual and mill certificates before design. Results are PRELIMINARY — NOT FOR CONSTRUCTION.