WT18X91 Steel WT-shape — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 18.2 | 462.3 mm |
| Flange Width (bf) | 12.1 | 30.73 cm |
| Flange Thickness (tf) | 1.18 | 30.0 mm |
| Web Thickness (tw) | 0.725 | 18.4 mm |
| Area (A) | 26.8 in² | 172.9 cm² |
| Weight | 91 lb/ft | 135.4 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 845 | 174 | in⁴ |
| Elastic Section Modulus (S) | 63.1 | 28.8 | in³ |
| Plastic Section Modulus (Z) | 113 | 45.3 | in³ |
| Radius of Gyration (r) | 5.62 | 2.55 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 9.2 | in⁴ |
| Warping Constant (Cw) | 77.6 | 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 WT18X91 tee? 91 lb/ft (135.4 kg/m).
What is the section modulus of WT18X91? Sx = 63.1 in³, Zx = 113 in³ (strong axis). Sy = 28.8 in³, Zy = 45.3 in³ (weak axis).
What steel grade is standard for WT18X91? ASTM A992 (Fy = 50 ksi, Fu = 65 ksi) for WT-shapes. Verify with mill certificate.
What is the moment of inertia of WT18X91? Ix = 845 in⁴ about the strong axis and Iy = 174 in⁴ about the weak axis. The radius of gyration is rx = 5.62 in and ry = 2.55 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.