WT20X181 Steel WT-shape — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 20.3 | 515.6 mm |
| Flange Width (bf) | 16 | 40.64 cm |
| Flange Thickness (tf) | 2.01 | 51.1 mm |
| Web Thickness (tw) | 1.12 | 28.4 mm |
| Area (A) | 53.2 in² | 343.2 cm² |
| Weight | 181 lb/ft | 269.4 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 1870 | 691 | in⁴ |
| Elastic Section Modulus (S) | 122 | 86.3 | in³ |
| Plastic Section Modulus (Z) | 217 | 135 | in³ |
| Radius of Gyration (r) | 5.92 | 3.6 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 54.2 | in⁴ |
| Warping Constant (Cw) | 511 | 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 WT20X181 tee? 181 lb/ft (269.4 kg/m).
What is the section modulus of WT20X181? Sx = 122 in³, Zx = 217 in³ (strong axis). Sy = 86.3 in³, Zy = 135 in³ (weak axis).
What steel grade is standard for WT20X181? ASTM A992 (Fy = 50 ksi, Fu = 65 ksi) for WT-shapes. Verify with mill certificate.
What is the moment of inertia of WT20X181? Ix = 1870 in⁴ about the strong axis and Iy = 691 in⁴ about the weak axis. The radius of gyration is rx = 5.92 in and ry = 3.6 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.