AISC 360-22ASTM A992 / A6W18 Series
AISC W18x143 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 | 143 lb/ft | 212.8 kg/m |
| Cross-Sectional Area | A | 42 in² | 27097 mm² |
| Overall Depth | d | 19.5 in | 495.3 mm |
| Flange Width | bf | 11.2 in | 284.5 mm |
| Flange Thickness | tf | 1.32 in | 33.5 mm |
| Web Thickness | tw | 0.73 in | 18.5 mm |
| Flange Centroid Distance | ho | 18.2 in | 462.3 mm |
Bending & Buckling Properties
| Property | Symbol | Imperial (US) | Metric (SI) |
|---|---|---|---|
| Strong-Axis Inertia | Ix | 2750 in⁴ | 1144.6 ×10⁶ mm⁴ |
| Strong-Axis Elastic Modulus | Sx | 282 in³ | 4621 ×10³ mm³ |
| Strong-Axis Plastic Modulus | Zx | 322 in³ | 5277 ×10³ mm³ |
| Strong-Axis Radius of Gyration | rx | 8.09 in | 205.5 mm |
| Weak-Axis Inertia | Iy | 311 in⁴ | 129.4 ×10⁶ mm⁴ |
| Weak-Axis Elastic Modulus | Sy | 55.5 in³ | 909 ×10³ mm³ |
| Weak-Axis Plastic Modulus | Zy | 85.4 in³ | 1399 ×10³ mm³ |
| Weak-Axis Radius of Gyration | ry | 2.72 in | 69.1 mm |
| Torsional Constant | J | 19.2 in⁴ | 7992 ×10³ mm⁴ |
| Warping Constant | Cw | 40450.2 in⁶ | 6901.4 ×10⁹ mm⁶ |
| Effective Radius of Gyration | rts | 3.17 in | 80.5 mm |
AISC 360-22 Design Capacities (Fy = 50 ksi / 345 MPa)
Plastic Moment Capacity (φMp)
1207.5 kip-ft
1638.4 kN·m (φ = 0.90)Nominal Shear Capacity (φVn)
384.3 kips
1711 kN (φ = 0.90)Flange Slenderness (λf = bf / 2tf)
4.24
✓ Compact Flange (λf ≤ 9.15)Web Slenderness (λw = h / tw)
23.1
✓ Compact Web (λw ≤ 90.5)