W33X291 Steel Beam — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 34.80 | in (883.9 mm) |
| Flange Width (bf) | 15.90 | in (403.9 mm) |
| Flange Thickness (tf) | 1.73 | in |
| Web Thickness (tw) | 0.96 | in |
| Area (A) | 85.60 | in² (552.3 cm²) |
| Weight | 291 | lb/ft (433 kg/m) |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 17,700 | 1,160 | in⁴ |
| Elastic Section Modulus (S) | 1,020 | 146 | in³ |
| Plastic Section Modulus (Z) | 1,160 | 226 | in³ |
| Radius of Gyration (r) | 14.40 | 3.68 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 65.10 | in⁴ |
| Warping Constant (Cw) | 319,000 | in⁶ |
| Distance Between Flange Centroids (ho) | 33.10 | in |
| Effective Radius (rts) | 4.34 | in |
Design Resources
- Beam Capacity Calculator — Check W33X291 for your span and loads
- Column Capacity Calculator — Check W33X291 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 W33X291 beam? 291 lb/ft (433 kg/m). A 40-ft length weighs approximately 11,640 lbs.
What is the section modulus of W33X291? Sx = 1020 in³ (strong axis) and Sy = 146 in³ (weak axis). The plastic section modulus Zx = 1160 in³ and Zy = 226 in³.
What steel grade is standard for W33X291? 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 W33X291? Ix = 17700 in⁴ about the strong axis and Iy = 1160 in⁴ about the weak axis. The radius of gyration is rx = 14.40 in and ry = 3.68 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.