WT18X80 Steel WT-shape — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 18 | 457.2 mm |
| Flange Width (bf) | 12 | 30.48 cm |
| Flange Thickness (tf) | 1.02 | 25.9 mm |
| Web Thickness (tw) | 0.65 | 16.5 mm |
| Area (A) | 23.5 in² | 151.6 cm² |
| Weight | 80 lb/ft | 119.1 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 740 | 147 | in⁴ |
| Elastic Section Modulus (S) | 55.8 | 24.6 | in³ |
| Plastic Section Modulus (Z) | 100 | 38.6 | in³ |
| Radius of Gyration (r) | 5.61 | 2.5 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 6.17 | in⁴ |
| Warping Constant (Cw) | 53.6 | 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 WT18X80 tee? 80 lb/ft (119.1 kg/m).
What is the section modulus of WT18X80? Sx = 55.8 in³, Zx = 100 in³ (strong axis). Sy = 24.6 in³, Zy = 38.6 in³ (weak axis).
What steel grade is standard for WT18X80? ASTM A992 (Fy = 50 ksi, Fu = 65 ksi) for WT-shapes. Verify with mill certificate.
What is the moment of inertia of WT18X80? Ix = 740 in⁴ about the strong axis and Iy = 147 in⁴ about the weak axis. The radius of gyration is rx = 5.61 in and ry = 2.5 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.