W40X331 Steel Beam — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 40.80 | in (1036.3 mm) |
| Flange Width (bf) | 12.20 | in (309.9 mm) |
| Flange Thickness (tf) | 2.13 | in |
| Web Thickness (tw) | 1.22 | in |
| Area (A) | 97.70 | in² (630.4 cm²) |
| Weight | 331 | lb/ft (493 kg/m) |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 24,700 | 644 | in⁴ |
| Elastic Section Modulus (S) | 1,210 | 106 | in³ |
| Plastic Section Modulus (Z) | 1,430 | 172 | in³ |
| Radius of Gyration (r) | 15.90 | 2.57 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 105 | in⁴ |
| Warping Constant (Cw) | 241,000 | in⁶ |
| Distance Between Flange Centroids (ho) | 38.70 | in |
| Effective Radius (rts) | 3.21 | in |
Design Resources
- Beam Capacity Calculator — Check W40X331 for your span and loads
- Column Capacity Calculator — Check W40X331 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 W40X331 beam? 331 lb/ft (493 kg/m). A 40-ft length weighs approximately 13,240 lbs.
What is the section modulus of W40X331? Sx = 1210 in³ (strong axis) and Sy = 106 in³ (weak axis). The plastic section modulus Zx = 1430 in³ and Zy = 172 in³.
What steel grade is standard for W40X331? 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 W40X331? Ix = 24700 in⁴ about the strong axis and Iy = 644 in⁴ about the weak axis. The radius of gyration is rx = 15.90 in and ry = 2.57 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.