W30X261 Steel Beam — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 31.60 | in (802.6 mm) |
| Flange Width (bf) | 15.20 | in (386.1 mm) |
| Flange Thickness (tf) | 1.65 | in |
| Web Thickness (tw) | 0.93 | in |
| Area (A) | 77 | in² (496.8 cm²) |
| Weight | 261 | lb/ft (388 kg/m) |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 13,100 | 959 | in⁴ |
| Elastic Section Modulus (S) | 829 | 127 | in³ |
| Plastic Section Modulus (Z) | 943 | 196 | in³ |
| Radius of Gyration (r) | 13.10 | 3.53 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 54.10 | in⁴ |
| Warping Constant (Cw) | 215,000 | in⁶ |
| Distance Between Flange Centroids (ho) | 30 | in |
| Effective Radius (rts) | 4.16 | in |
Design Resources
- Beam Capacity Calculator — Check W30X261 for your span and loads
- Column Capacity Calculator — Check W30X261 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 W30X261 beam? 261 lb/ft (388 kg/m). A 40-ft length weighs approximately 10,440 lbs.
What is the section modulus of W30X261? Sx = 829 in³ (strong axis) and Sy = 127 in³ (weak axis). The plastic section modulus Zx = 943 in³ and Zy = 196 in³.
What steel grade is standard for W30X261? 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 W30X261? Ix = 13100 in⁴ about the strong axis and Iy = 959 in⁴ about the weak axis. The radius of gyration is rx = 13.10 in and ry = 3.53 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.