WT18X115.5 Steel WT-shape — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 18.2 | 462.3 mm |
| Flange Width (bf) | 16.5 | 41.91 cm |
| Flange Thickness (tf) | 1.26 | 32.0 mm |
| Web Thickness (tw) | 0.76 | 19.3 mm |
| Area (A) | 34.1 in² | 220.0 cm² |
| Weight | 115.5 lb/ft | 171.9 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 978 | 470 | in⁴ |
| Elastic Section Modulus (S) | 69.1 | 57 | in³ |
| Plastic Section Modulus (Z) | 122 | 88 | in³ |
| Radius of Gyration (r) | 5.36 | 3.71 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 14.3 | in⁴ |
| Warping Constant (Cw) | 129 | 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 WT18X115.5 tee? 115.5 lb/ft (171.9 kg/m).
What is the section modulus of WT18X115.5? Sx = 69.1 in³, Zx = 122 in³ (strong axis). Sy = 57 in³, Zy = 88 in³ (weak axis).
What steel grade is standard for WT18X115.5? ASTM A992 (Fy = 50 ksi, Fu = 65 ksi) for WT-shapes. Verify with mill certificate.
What is the moment of inertia of WT18X115.5? Ix = 978 in⁴ about the strong axis and Iy = 470 in⁴ about the weak axis. The radius of gyration is rx = 5.36 in and ry = 3.71 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.