ST12X45 Steel ST-shape — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 12 | 304.8 mm |
| Flange Width (bf) | 7.13 | 18.11 cm |
| Flange Thickness (tf) | 0.87 | 22.1 mm |
| Web Thickness (tw) | 0.625 | 15.9 mm |
| Area (A) | 13.2 in² | 85.2 cm² |
| Weight | 45 lb/ft | 67.0 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 190 | 22.3 | in⁴ |
| Elastic Section Modulus (S) | 22.6 | 6.27 | in³ |
| Plastic Section Modulus (Z) | 41.1 | 11.2 | in³ |
| Radius of Gyration (r) | 3.79 | 1.3 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 3.01 | in⁴ |
| Warping Constant (Cw) | 12.1 | 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 ST12X45 tee? 45 lb/ft (67.0 kg/m).
What is the section modulus of ST12X45? Sx = 22.6 in³, Zx = 41.1 in³ (strong axis). Sy = 6.27 in³, Zy = 11.2 in³ (weak axis).
What steel grade is standard for ST12X45? ASTM A36 (Fy = 36 ksi) for ST-shapes. Verify with mill certificate.
What is the moment of inertia of ST12X45? Ix = 190 in⁴ about the strong axis and Iy = 22.3 in⁴ about the weak axis. The radius of gyration is rx = 3.79 in and ry = 1.3 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.