S4X7.7 Steel S-shape — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 4 | 101.6 mm |
| Flange Width (bf) | 2.66 | 6.76 cm |
| Flange Thickness (tf) | 0.293 | 7.4 mm |
| Web Thickness (tw) | 0.193 | 4.9 mm |
| Area (A) | 2.26 in² | 14.6 cm² |
| Weight | 7.7 lb/ft | 11.5 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 6.05 | 0.748 | in⁴ |
| Elastic Section Modulus (S) | 3.03 | 0.562 | in³ |
| Plastic Section Modulus (Z) | 3.5 | 0.97 | in³ |
| Radius of Gyration (r) | 1.64 | 0.576 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 0.073 | in⁴ |
| Warping Constant (Cw) | 2.57 | in⁶ |
| Distance Between Flange Centroids (ho) | 3.71 | in |
| Effective Radius (rts) | 0.676 | in |
Design Resources
- Beam Capacity Calculator — Check S4X7.7 for your span and loads
- Column Capacity Calculator — Check S4X7.7 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 S4X7.7 beam? 7.7 lb/ft (11.5 kg/m).
What is the section modulus of S4X7.7? Sx = 3.03 in³, Zx = 3.5 in³ (strong axis). Sy = 0.562 in³, Zy = 0.97 in³ (weak axis).
What steel grade is standard for S4X7.7? ASTM A36 (Fy = 36 ksi) for S-shapes. Verify with mill certificate.
What is the moment of inertia of S4X7.7? Ix = 6.05 in⁴ about the strong axis and Iy = 0.748 in⁴ about the weak axis. The radius of gyration is rx = 1.64 in and ry = 0.576 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.