WT18X128 Steel WT-shape — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 18.7 | 475.0 mm |
| Flange Width (bf) | 12.2 | 30.99 cm |
| Flange Thickness (tf) | 1.73 | 43.9 mm |
| Web Thickness (tw) | 0.96 | 24.4 mm |
| Area (A) | 37.6 in² | 242.6 cm² |
| Weight | 128 lb/ft | 190.5 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 1210 | 264 | in⁴ |
| Elastic Section Modulus (S) | 87.4 | 43.2 | in³ |
| Plastic Section Modulus (Z) | 156 | 68.5 | in³ |
| Radius of Gyration (r) | 5.66 | 2.65 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 26.4 | in⁴ |
| Warping Constant (Cw) | 205 | 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 WT18X128 tee? 128 lb/ft (190.5 kg/m).
What is the section modulus of WT18X128? Sx = 87.4 in³, Zx = 156 in³ (strong axis). Sy = 43.2 in³, Zy = 68.5 in³ (weak axis).
What steel grade is standard for WT18X128? ASTM A992 (Fy = 50 ksi, Fu = 65 ksi) for WT-shapes. Verify with mill certificate.
What is the moment of inertia of WT18X128? Ix = 1210 in⁴ about the strong axis and Iy = 264 in⁴ about the weak axis. The radius of gyration is rx = 5.66 in and ry = 2.65 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.