WT4X9 Steel WT-shape — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 4.07 | 103.4 mm |
| Flange Width (bf) | 5.25 | 13.34 cm |
| Flange Thickness (tf) | 0.33 | 8.4 mm |
| Web Thickness (tw) | 0.23 | 5.8 mm |
| Area (A) | 2.63 in² | 17.0 cm² |
| Weight | 9 lb/ft | 13.4 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 3.41 | 3.98 | in⁴ |
| Elastic Section Modulus (S) | 1.05 | 1.52 | in³ |
| Plastic Section Modulus (Z) | 1.86 | 2.33 | in³ |
| Radius of Gyration (r) | 1.14 | 1.23 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 0.086 | in⁴ |
| Warping Constant (Cw) | 0.056 | 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 WT4X9 tee? 9 lb/ft (13.4 kg/m).
What is the section modulus of WT4X9? Sx = 1.05 in³, Zx = 1.86 in³ (strong axis). Sy = 1.52 in³, Zy = 2.33 in³ (weak axis).
What steel grade is standard for WT4X9? ASTM A992 (Fy = 50 ksi, Fu = 65 ksi) for WT-shapes. Verify with mill certificate.
What is the moment of inertia of WT4X9? Ix = 3.41 in⁴ about the strong axis and Iy = 3.98 in⁴ about the weak axis. The radius of gyration is rx = 1.14 in and ry = 1.23 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.