AISC 360-22ASTM A992 / A6W21 Series
AISC W21x166 Properties & Dimensions
Standard wide flange I-beam cross-section properties, geometric dimensions, and LRFD design capacities per AISC Steel Construction Manual 15th/16th Edition.
Cross-Section Technical Schematic
Dual Units: Imperial (US) · SI MetricGeometric Dimensions & Area
| Property | Symbol | Imperial (US) | Metric (SI) |
|---|---|---|---|
| Nominal Weight | w | 166 lb/ft | 247 kg/m |
| Cross-Sectional Area | A | 48.8 in² | 31484 mm² |
| Overall Depth | d | 22.5 in | 571.5 mm |
| Flange Width | bf | 12.4 in | 315 mm |
| Flange Thickness | tf | 1.36 in | 34.5 mm |
| Web Thickness | tw | 0.75 in | 19 mm |
| Flange Centroid Distance | ho | 21.1 in | 535.9 mm |
Bending & Buckling Properties
| Property | Symbol | Imperial (US) | Metric (SI) |
|---|---|---|---|
| Strong-Axis Inertia | Ix | 4280 in⁴ | 1781.5 ×10⁶ mm⁴ |
| Strong-Axis Elastic Modulus | Sx | 380 in³ | 6227 ×10³ mm³ |
| Strong-Axis Plastic Modulus | Zx | 432 in³ | 7079 ×10³ mm³ |
| Strong-Axis Radius of Gyration | rx | 9.36 in | 237.7 mm |
| Weak-Axis Inertia | Iy | 435 in⁴ | 181.1 ×10⁶ mm⁴ |
| Weak-Axis Elastic Modulus | Sy | 70 in³ | 1147 ×10³ mm³ |
| Weak-Axis Plastic Modulus | Zy | 108 in³ | 1770 ×10³ mm³ |
| Weak-Axis Radius of Gyration | ry | 2.99 in | 75.9 mm |
| Torsional Constant | J | 23.6 in⁴ | 9823 ×10³ mm⁴ |
| Warping Constant | Cw | 76336 in⁶ | 13024 ×10⁹ mm⁶ |
| Effective Radius of Gyration | rts | 3.48 in | 88.4 mm |
AISC 360-22 Design Capacities (Fy = 50 ksi / 345 MPa)
Plastic Moment Capacity (φMp)
1620 kip-ft
2198.1 kN·m (φ = 0.90)Nominal Shear Capacity (φVn)
455.6 kips
2028.3 kN (φ = 0.90)Flange Slenderness (λf = bf / 2tf)
4.56
✓ Compact Flange (λf ≤ 9.15)Web Slenderness (λw = h / tw)
26.4
✓ Compact Web (λw ≤ 90.5)