AISC 360-22ASTM A992 / A6W18 Series
AISC W18x46 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 | 46 lb/ft | 68.5 kg/m |
| Cross-Sectional Area | A | 13.5 in² | 8710 mm² |
| Overall Depth | d | 18.1 in | 459.7 mm |
| Flange Width | bf | 6.06 in | 153.9 mm |
| Flange Thickness | tf | 0.605 in | 15.4 mm |
| Web Thickness | tw | 0.36 in | 9.1 mm |
| Flange Centroid Distance | ho | 17.5 in | 444.5 mm |
Bending & Buckling Properties
| Property | Symbol | Imperial (US) | Metric (SI) |
|---|---|---|---|
| Strong-Axis Inertia | Ix | 712 in⁴ | 296.4 ×10⁶ mm⁴ |
| Strong-Axis Elastic Modulus | Sx | 78.8 in³ | 1291 ×10³ mm³ |
| Strong-Axis Plastic Modulus | Zx | 90.7 in³ | 1486 ×10³ mm³ |
| Strong-Axis Radius of Gyration | rx | 7.25 in | 184.1 mm |
| Weak-Axis Inertia | Iy | 22.5 in⁴ | 9.4 ×10⁶ mm⁴ |
| Weak-Axis Elastic Modulus | Sy | 7.4 in³ | 122 ×10³ mm³ |
| Weak-Axis Plastic Modulus | Zy | 11.7 in³ | 192 ×10³ mm³ |
| Weak-Axis Radius of Gyration | ry | 1.29 in | 32.8 mm |
| Torsional Constant | J | 1.22 in⁴ | 508 ×10³ mm⁴ |
| Warping Constant | Cw | 2707.2 in⁶ | 461.9 ×10⁹ mm⁶ |
| Effective Radius of Gyration | rts | 1.58 in | 40.1 mm |
AISC 360-22 Design Capacities (Fy = 50 ksi / 345 MPa)
Plastic Moment Capacity (φMp)
340.1 kip-ft
461.5 kN·m (φ = 0.90)Nominal Shear Capacity (φVn)
175.9 kips
783.2 kN (φ = 0.90)Flange Slenderness (λf = bf / 2tf)
5.01
✓ Compact Flange (λf ≤ 9.15)Web Slenderness (λw = h / tw)
46.9
✓ Compact Web (λw ≤ 90.5)