WT12X31 Steel WT-shape — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 11.9 | 302.3 mm |
| Flange Width (bf) | 7.04 | 17.88 cm |
| Flange Thickness (tf) | 0.59 | 15.0 mm |
| Web Thickness (tw) | 0.43 | 10.9 mm |
| Area (A) | 9.11 in² | 58.8 cm² |
| Weight | 31 lb/ft | 46.1 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 131 | 17.2 | in⁴ |
| Elastic Section Modulus (S) | 15.6 | 4.9 | in³ |
| Plastic Section Modulus (Z) | 28.4 | 7.85 | in³ |
| Radius of Gyration (r) | 3.79 | 1.38 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 0.85 | in⁴ |
| Warping Constant (Cw) | 3.92 | 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 WT12X31 tee? 31 lb/ft (46.1 kg/m).
What is the section modulus of WT12X31? Sx = 15.6 in³, Zx = 28.4 in³ (strong axis). Sy = 4.9 in³, Zy = 7.85 in³ (weak axis).
What steel grade is standard for WT12X31? ASTM A992 (Fy = 50 ksi, Fu = 65 ksi) for WT-shapes. Verify with mill certificate.
What is the moment of inertia of WT12X31? Ix = 131 in⁴ about the strong axis and Iy = 17.2 in⁴ about the weak axis. The radius of gyration is rx = 3.79 in and ry = 1.38 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.