WT18X401 Steel WT-shape — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 21.3 | 541.0 mm |
| Flange Width (bf) | 18 | 45.72 cm |
| Flange Thickness (tf) | 4.29 | 109.0 mm |
| Web Thickness (tw) | 2.38 | 60.5 mm |
| Area (A) | 118 in² | 761.3 cm² |
| Weight | 401 lb/ft | 596.8 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 4110 | 2100 | in⁴ |
| Elastic Section Modulus (S) | 265 | 233 | in³ |
| Plastic Section Modulus (Z) | 491 | 372 | in³ |
| Radius of Gyration (r) | 5.9 | 4.22 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 519 | in⁴ |
| Warping Constant (Cw) | 5830 | 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 WT18X401 tee? 401 lb/ft (596.8 kg/m).
What is the section modulus of WT18X401? Sx = 265 in³, Zx = 491 in³ (strong axis). Sy = 233 in³, Zy = 372 in³ (weak axis).
What steel grade is standard for WT18X401? ASTM A992 (Fy = 50 ksi, Fu = 65 ksi) for WT-shapes. Verify with mill certificate.
What is the moment of inertia of WT18X401? Ix = 4110 in⁴ about the strong axis and Iy = 2100 in⁴ about the weak axis. The radius of gyration is rx = 5.9 in and ry = 4.22 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.