W21X93 Steel Beam — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 21.60 | in (548.6 mm) |
| Flange Width (bf) | 8.42 | in (213.9 mm) |
| Flange Thickness (tf) | 0.93 | in |
| Web Thickness (tw) | 0.58 | in |
| Area (A) | 27.30 | in² (176.1 cm²) |
| Weight | 93 | lb/ft (138 kg/m) |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 2,070 | 92.90 | in⁴ |
| Elastic Section Modulus (S) | 192 | 22.10 | in³ |
| Plastic Section Modulus (Z) | 221 | 34.70 | in³ |
| Radius of Gyration (r) | 8.70 | 1.84 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 6.03 | in⁴ |
| Warping Constant (Cw) | 9,940 | in⁶ |
| Distance Between Flange Centroids (ho) | 20.70 | in |
| Effective Radius (rts) | 2.24 | in |
Design Resources
- Beam Capacity Calculator — Check W21X93 for your span and loads
- Column Capacity Calculator — Check W21X93 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 W21X93 beam? 93 lb/ft (138 kg/m). A 40-ft length weighs approximately 3,720 lbs.
What is the section modulus of W21X93? Sx = 192 in³ (strong axis) and Sy = 22.1 in³ (weak axis). The plastic section modulus Zx = 221 in³ and Zy = 34.7 in³.
What steel grade is standard for W21X93? 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 W21X93? Ix = 2070 in⁴ about the strong axis and Iy = 92.9 in⁴ about the weak axis. The radius of gyration is rx = 8.70 in and ry = 1.84 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.