AISC 360-22ASTM A992 / A6W18 Series
AISC W18x65 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 | 65 lb/ft | 96.7 kg/m |
| Cross-Sectional Area | A | 19.1 in² | 12323 mm² |
| Overall Depth | d | 18.4 in | 467.4 mm |
| Flange Width | bf | 7.59 in | 192.8 mm |
| Flange Thickness | tf | 0.75 in | 19 mm |
| Web Thickness | tw | 0.45 in | 11.4 mm |
| Flange Centroid Distance | ho | 17.7 in | 449.6 mm |
Bending & Buckling Properties
| Property | Symbol | Imperial (US) | Metric (SI) |
|---|---|---|---|
| Strong-Axis Inertia | Ix | 1070 in⁴ | 445.4 ×10⁶ mm⁴ |
| Strong-Axis Elastic Modulus | Sx | 117 in³ | 1917 ×10³ mm³ |
| Strong-Axis Plastic Modulus | Zx | 133 in³ | 2179 ×10³ mm³ |
| Strong-Axis Radius of Gyration | rx | 7.49 in | 190.2 mm |
| Weak-Axis Inertia | Iy | 54.8 in⁴ | 22.8 ×10⁶ mm⁴ |
| Weak-Axis Elastic Modulus | Sy | 14.4 in³ | 236 ×10³ mm³ |
| Weak-Axis Plastic Modulus | Zy | 22.5 in³ | 369 ×10³ mm³ |
| Weak-Axis Radius of Gyration | ry | 1.69 in | 42.9 mm |
| Torsional Constant | J | 2.73 in⁴ | 1136 ×10³ mm⁴ |
| Warping Constant | Cw | 6673.5 in⁶ | 1138.6 ×10⁹ mm⁶ |
| Effective Radius of Gyration | rts | 2.03 in | 51.6 mm |
AISC 360-22 Design Capacities (Fy = 50 ksi / 345 MPa)
Plastic Moment Capacity (φMp)
498.8 kip-ft
676.7 kN·m (φ = 0.90)Nominal Shear Capacity (φVn)
223.6 kips
995.2 kN (φ = 0.90)Flange Slenderness (λf = bf / 2tf)
5.06
✓ Compact Flange (λf ≤ 9.15)Web Slenderness (λw = h / tw)
37.6
✓ Compact Web (λw ≤ 90.5)