W30X90 Steel Beam — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 29.50 | in (749.3 mm) |
| Flange Width (bf) | 10.40 | in (264.2 mm) |
| Flange Thickness (tf) | 0.61 | in |
| Web Thickness (tw) | 0.47 | in |
| Area (A) | 26.30 | in² (169.7 cm²) |
| Weight | 90 | lb/ft (134 kg/m) |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 3,610 | 115 | in⁴ |
| Elastic Section Modulus (S) | 245 | 22.10 | in³ |
| Plastic Section Modulus (Z) | 283 | 34.70 | in³ |
| Radius of Gyration (r) | 11.70 | 2.09 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 2.84 | in⁴ |
| Warping Constant (Cw) | 24,000 | in⁶ |
| Distance Between Flange Centroids (ho) | 28.90 | in |
| Effective Radius (rts) | 2.60 | in |
Design Resources
- Beam Capacity Calculator — Check W30X90 for your span and loads
- Column Capacity Calculator — Check W30X90 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 W30X90 beam? 90 lb/ft (134 kg/m). A 40-ft length weighs approximately 3,600 lbs.
What is the section modulus of W30X90? Sx = 245 in³ (strong axis) and Sy = 22.1 in³ (weak axis). The plastic section modulus Zx = 283 in³ and Zy = 34.7 in³.
What steel grade is standard for W30X90? 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 W30X90? Ix = 3610 in⁴ about the strong axis and Iy = 115 in⁴ about the weak axis. The radius of gyration is rx = 11.70 in and ry = 2.09 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.