W30X99 Steel Beam — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 29.70 | in (754.4 mm) |
| Flange Width (bf) | 10.50 | in (266.7 mm) |
| Flange Thickness (tf) | 0.67 | in |
| Web Thickness (tw) | 0.52 | in |
| Area (A) | 29 | in² (187.1 cm²) |
| Weight | 99 | lb/ft (147 kg/m) |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 3,990 | 128 | in⁴ |
| Elastic Section Modulus (S) | 269 | 24.50 | in³ |
| Plastic Section Modulus (Z) | 312 | 38.60 | in³ |
| Radius of Gyration (r) | 11.70 | 2.10 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 3.77 | in⁴ |
| Warping Constant (Cw) | 26,800 | in⁶ |
| Distance Between Flange Centroids (ho) | 29 | in |
| Effective Radius (rts) | 2.62 | in |
Design Resources
- Beam Capacity Calculator — Check W30X99 for your span and loads
- Column Capacity Calculator — Check W30X99 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 W30X99 beam? 99 lb/ft (147 kg/m). A 40-ft length weighs approximately 3,960 lbs.
What is the section modulus of W30X99? Sx = 269 in³ (strong axis) and Sy = 24.5 in³ (weak axis). The plastic section modulus Zx = 312 in³ and Zy = 38.6 in³.
What steel grade is standard for W30X99? 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 W30X99? Ix = 3990 in⁴ about the strong axis and Iy = 128 in⁴ about the weak axis. The radius of gyration is rx = 11.70 in and ry = 2.10 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.