W840x391 G40.21 350W — Canadian W-Shape Section Properties
Approximate equivalent of W33X263 per AISC A6. Approx. equivalent of W33X263. Verify against CISC Handbook.
Dimensions (Metric)
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 876.3 | mm |
| Flange Width (bf) | 401.3 | mm |
| Flange Thickness (tf) | 39.9 | mm |
| Web Thickness (tw) | 22.1 | mm |
| Cross-Sectional Area (A) | 499.4 | cm² |
| Mass | 391.3 | kg/m |
Elastic Section Properties (Metric)
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 661,806 | 43,288 | cm⁴ |
| Elastic Section Modulus (S) | 15,060 | 2,147 | cm³ |
| Plastic Section Modulus (Z) | 17,042 | 3,310 | cm³ |
| Radius of Gyration (r) | 36.32 | 9.30 | cm |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 2,027 | cm⁴ |
| Warping Constant (Cw) | 75,448,500 | cm⁶ |
| Distance Between Flange Centroids (ho) | 83.57 | cm |
| Effective Radius (rts) | 10.95 | cm |
Imperial Reference
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 34.50 | in |
| Flange Width (bf) | 15.80 | in |
| Area (A) | 77.40 | in² |
| Weight | 263 | lb/ft |
Design Resources
- Canadian Steel Design Guide — CSA S16 overview
- Canadian Steel Beam Sizes — Full W-shape dimension table
- CSA G40.21 Steel Grades — 300W, 350W, 400W properties
- Beam Capacity Calculator — Check W840x391 for your loads
- Column Capacity Calculator — Check W840x391 as a column
- Section Properties Database — Compare with other sections
Frequently Asked Questions
What is the W840x391 equivalent to in US units? It approximates a W33X263 (d=34.5in, 263lb/ft). Section properties are from AISC A6 shapes database, converted to metric units.
What steel grade is standard for W840x391? Typically G40.21 350W per CSA G40.21. Also available as 300W, 350WT, 400W. Verify grade requirements with project specifications.
What is the mass of a W840x391 beam? 391.3 kg/m. A 12m length weighs approximately 4,696 kg.
What is the section modulus of W840x391? Sx = 15,060 cm³ (strong axis) and Sy = 2,147 cm³ (weak axis). The plastic section modulus Zx = 17,042 cm³.
Related Pages
- Canadian Steel Beam Sizes Reference
- CSA S16 Beam Design
- CSA S16 Design Guide
- Beam Capacity Calculator
- Column Capacity Calculator
Educational reference only. Verify all section properties against the current CISC Handbook of Steel Construction and mill certificates before design. Results are PRELIMINARY — NOT FOR CONSTRUCTION.