W40X149 Steel Beam — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 38.20 | in (970.3 mm) |
| Flange Width (bf) | 11.80 | in (299.7 mm) |
| Flange Thickness (tf) | 0.83 | in |
| Web Thickness (tw) | 0.63 | in |
| Area (A) | 43.80 | in² (282.6 cm²) |
| Weight | 149 | lb/ft (222 kg/m) |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 9,800 | 229 | in⁴ |
| Elastic Section Modulus (S) | 513 | 38.80 | in³ |
| Plastic Section Modulus (Z) | 598 | 62.20 | in³ |
| Radius of Gyration (r) | 15 | 2.29 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 9.36 | in⁴ |
| Warping Constant (Cw) | 80,000 | in⁶ |
| Distance Between Flange Centroids (ho) | 37.40 | in |
| Effective Radius (rts) | 2.89 | in |
Design Resources
- Beam Capacity Calculator — Check W40X149 for your span and loads
- Column Capacity Calculator — Check W40X149 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 W40X149 beam? 149 lb/ft (222 kg/m). A 40-ft length weighs approximately 5,960 lbs.
What is the section modulus of W40X149? Sx = 513 in³ (strong axis) and Sy = 38.8 in³ (weak axis). The plastic section modulus Zx = 598 in³ and Zy = 62.2 in³.
What steel grade is standard for W40X149? 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 W40X149? Ix = 9800 in⁴ about the strong axis and Iy = 229 in⁴ about the weak axis. The radius of gyration is rx = 15 in and ry = 2.29 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.