WT8X20 Steel WT-shape — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 8.01 | 203.5 mm |
| Flange Width (bf) | 7 | 17.78 cm |
| Flange Thickness (tf) | 0.505 | 12.8 mm |
| Web Thickness (tw) | 0.305 | 7.7 mm |
| Area (A) | 5.89 in² | 38.0 cm² |
| Weight | 20 lb/ft | 29.8 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 33.1 | 14.4 | in⁴ |
| Elastic Section Modulus (S) | 5.35 | 4.12 | in³ |
| Plastic Section Modulus (Z) | 9.43 | 6.36 | in³ |
| Radius of Gyration (r) | 2.37 | 1.56 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 0.396 | in⁴ |
| Warping Constant (Cw) | 0.673 | 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 WT8X20 tee? 20 lb/ft (29.8 kg/m).
What is the section modulus of WT8X20? Sx = 5.35 in³, Zx = 9.43 in³ (strong axis). Sy = 4.12 in³, Zy = 6.36 in³ (weak axis).
What steel grade is standard for WT8X20? ASTM A992 (Fy = 50 ksi, Fu = 65 ksi) for WT-shapes. Verify with mill certificate.
What is the moment of inertia of WT8X20? Ix = 33.1 in⁴ about the strong axis and Iy = 14.4 in⁴ about the weak axis. The radius of gyration is rx = 2.37 in and ry = 1.56 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.