S3X7.5 Steel S-shape — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 3 | 76.2 mm |
| Flange Width (bf) | 2.51 | 6.38 cm |
| Flange Thickness (tf) | 0.26 | 6.6 mm |
| Web Thickness (tw) | 0.349 | 8.9 mm |
| Area (A) | 2.2 in² | 14.2 cm² |
| Weight | 7.5 lb/ft | 11.2 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 2.91 | 0.578 | in⁴ |
| Elastic Section Modulus (S) | 1.94 | 0.461 | in³ |
| Plastic Section Modulus (Z) | 2.35 | 0.821 | in³ |
| Radius of Gyration (r) | 1.15 | 0.513 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 0.09 | in⁴ |
| Warping Constant (Cw) | 1.08 | in⁶ |
| Distance Between Flange Centroids (ho) | 2.74 | in |
| Effective Radius (rts) | 0.638 | in |
Design Resources
- Beam Capacity Calculator — Check S3X7.5 for your span and loads
- Column Capacity Calculator — Check S3X7.5 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 S3X7.5 beam? 7.5 lb/ft (11.2 kg/m).
What is the section modulus of S3X7.5? Sx = 1.94 in³, Zx = 2.35 in³ (strong axis). Sy = 0.461 in³, Zy = 0.821 in³ (weak axis).
What steel grade is standard for S3X7.5? ASTM A36 (Fy = 36 ksi) for S-shapes. Verify with mill certificate.
What is the moment of inertia of S3X7.5? Ix = 2.91 in⁴ about the strong axis and Iy = 0.578 in⁴ about the weak axis. The radius of gyration is rx = 1.15 in and ry = 0.513 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.