WT20X139 Steel WT-shape — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 20.1 | 510.5 mm |
| Flange Width (bf) | 12 | 30.48 cm |
| Flange Thickness (tf) | 1.81 | 46.0 mm |
| Web Thickness (tw) | 1.03 | 26.2 mm |
| Area (A) | 41 in² | 264.5 cm² |
| Weight | 139 lb/ft | 206.9 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 1550 | 261 | in⁴ |
| Elastic Section Modulus (S) | 106 | 43.5 | in³ |
| Plastic Section Modulus (Z) | 191 | 69.9 | in³ |
| Radius of Gyration (r) | 6.14 | 2.52 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 32.4 | in⁴ |
| Warping Constant (Cw) | 282 | 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 WT20X139 tee? 139 lb/ft (206.9 kg/m).
What is the section modulus of WT20X139? Sx = 106 in³, Zx = 191 in³ (strong axis). Sy = 43.5 in³, Zy = 69.9 in³ (weak axis).
What steel grade is standard for WT20X139? ASTM A992 (Fy = 50 ksi, Fu = 65 ksi) for WT-shapes. Verify with mill certificate.
What is the moment of inertia of WT20X139? Ix = 1550 in⁴ about the strong axis and Iy = 261 in⁴ about the weak axis. The radius of gyration is rx = 6.14 in and ry = 2.52 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.