W33X221 Steel Beam — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 33.90 | in (861.1 mm) |
| Flange Width (bf) | 15.80 | in (401.3 mm) |
| Flange Thickness (tf) | 1.28 | in |
| Web Thickness (tw) | 0.78 | in |
| Area (A) | 65.30 | in² (421.3 cm²) |
| Weight | 221 | lb/ft (329 kg/m) |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 12,900 | 840 | in⁴ |
| Elastic Section Modulus (S) | 759 | 106 | in³ |
| Plastic Section Modulus (Z) | 857 | 164 | in³ |
| Radius of Gyration (r) | 14.10 | 3.59 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 27.80 | in⁴ |
| Warping Constant (Cw) | 224,000 | in⁶ |
| Distance Between Flange Centroids (ho) | 32.60 | in |
| Effective Radius (rts) | 4.25 | in |
Design Resources
- Beam Capacity Calculator — Check W33X221 for your span and loads
- Column Capacity Calculator — Check W33X221 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 W33X221 beam? 221 lb/ft (329 kg/m). A 40-ft length weighs approximately 8,840 lbs.
What is the section modulus of W33X221? Sx = 759 in³ (strong axis) and Sy = 106 in³ (weak axis). The plastic section modulus Zx = 857 in³ and Zy = 164 in³.
What steel grade is standard for W33X221? 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 W33X221? Ix = 12900 in⁴ about the strong axis and Iy = 840 in⁴ about the weak axis. The radius of gyration is rx = 14.10 in and ry = 3.59 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.