W30X124 Steel Beam — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 30.20 | in (767.1 mm) |
| Flange Width (bf) | 10.50 | in (266.7 mm) |
| Flange Thickness (tf) | 0.93 | in |
| Web Thickness (tw) | 0.58 | in |
| Area (A) | 36.50 | in² (235.5 cm²) |
| Weight | 124 | lb/ft (185 kg/m) |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 5,360 | 181 | in⁴ |
| Elastic Section Modulus (S) | 355 | 34.40 | in³ |
| Plastic Section Modulus (Z) | 408 | 54 | in³ |
| Radius of Gyration (r) | 12.10 | 2.23 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 7.99 | in⁴ |
| Warping Constant (Cw) | 38,600 | in⁶ |
| Distance Between Flange Centroids (ho) | 29.30 | in |
| Effective Radius (rts) | 2.73 | in |
Design Resources
- Beam Capacity Calculator — Check W30X124 for your span and loads
- Column Capacity Calculator — Check W30X124 as a column
- Section Properties Database — Compare with other sections
- Steel Beam Sizes Reference — Full W-shape dimension table
- Steel Grades Reference — A992/A572 material properties
Frequently Asked Questions
What is the weight of a W30X124 beam? 124 lb/ft (185 kg/m). A 40-ft length weighs approximately 4,960 lbs.
What is the section modulus of W30X124? Sx = 355 in³ (strong axis) and Sy = 34.4 in³ (weak axis). The plastic section modulus Zx = 408 in³ and Zy = 54 in³.
What steel grade is standard for W30X124? Typically ASTM A992 (Fy = 50 ksi, Fu = 65 ksi) for W-shapes. Also available in A572 Grade 50 or A36. Verify with mill certificate.
What is the moment of inertia of W30X124? Ix = 5360 in⁴ about the strong axis and Iy = 181 in⁴ about the weak axis. The radius of gyration is rx = 12.10 in and ry = 2.23 in.
Related Pages
- Steel Beam Sizes Reference
- Beam Capacity Calculator
- Column Capacity Calculator
- Section Properties Database
Educational reference only. Verify all section properties against the current AISC Manual and mill certificates before design. Results are PRELIMINARY — NOT FOR CONSTRUCTION.