S15X42.9 Steel S-shape — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 15 | 381.0 mm |
| Flange Width (bf) | 5.5 | 13.97 cm |
| Flange Thickness (tf) | 0.622 | 15.8 mm |
| Web Thickness (tw) | 0.411 | 10.4 mm |
| Area (A) | 12.6 in² | 81.3 cm² |
| Weight | 42.9 lb/ft | 63.8 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 446 | 14.3 | in⁴ |
| Elastic Section Modulus (S) | 59.4 | 5.19 | in³ |
| Plastic Section Modulus (Z) | 69.2 | 9.08 | in³ |
| Radius of Gyration (r) | 5.95 | 1.06 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 1.54 | in⁴ |
| Warping Constant (Cw) | 737 | in⁶ |
| Distance Between Flange Centroids (ho) | 14.4 | in |
| Effective Radius (rts) | 1.31 | in |
Design Resources
- Beam Capacity Calculator — Check S15X42.9 for your span and loads
- Column Capacity Calculator — Check S15X42.9 as a column
- 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 S15X42.9 beam? 42.9 lb/ft (63.8 kg/m).
What is the section modulus of S15X42.9? Sx = 59.4 in³, Zx = 69.2 in³ (strong axis). Sy = 5.19 in³, Zy = 9.08 in³ (weak axis).
What steel grade is standard for S15X42.9? ASTM A36 (Fy = 36 ksi) for S-shapes. Verify with mill certificate.
What is the moment of inertia of S15X42.9? Ix = 446 in⁴ about the strong axis and Iy = 14.3 in⁴ about the weak axis. The radius of gyration is rx = 5.95 in and ry = 1.06 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.