AISC 360-22ASTM A992 / A6W18 Series
AISC W18x283 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 | 283 lb/ft | 421.1 kg/m |
| Cross-Sectional Area | A | 83.3 in² | 53742 mm² |
| Overall Depth | d | 21.9 in | 556.3 mm |
| Flange Width | bf | 11.9 in | 302.3 mm |
| Flange Thickness | tf | 2.5 in | 63.5 mm |
| Web Thickness | tw | 1.4 in | 35.6 mm |
| Flange Centroid Distance | ho | 19.4 in | 492.8 mm |
Bending & Buckling Properties
| Property | Symbol | Imperial (US) | Metric (SI) |
|---|---|---|---|
| Strong-Axis Inertia | Ix | 6170 in⁴ | 2568.1 ×10⁶ mm⁴ |
| Strong-Axis Elastic Modulus | Sx | 565 in³ | 9259 ×10³ mm³ |
| Strong-Axis Plastic Modulus | Zx | 676 in³ | 11078 ×10³ mm³ |
| Strong-Axis Radius of Gyration | rx | 8.61 in | 218.7 mm |
| Weak-Axis Inertia | Iy | 704 in⁴ | 293 ×10⁶ mm⁴ |
| Weak-Axis Elastic Modulus | Sy | 118 in³ | 1934 ×10³ mm³ |
| Weak-Axis Plastic Modulus | Zy | 185 in³ | 3032 ×10³ mm³ |
| Weak-Axis Radius of Gyration | ry | 2.91 in | 73.9 mm |
| Torsional Constant | J | 134 in⁴ | 55775 ×10³ mm⁴ |
| Warping Constant | Cw | 103722.5 in⁶ | 17696.5 ×10⁹ mm⁶ |
| Effective Radius of Gyration | rts | 3.47 in | 88.1 mm |
AISC 360-22 Design Capacities (Fy = 50 ksi / 345 MPa)
Plastic Moment Capacity (φMp)
2535 kip-ft
3439.6 kN·m (φ = 0.90)Nominal Shear Capacity (φVn)
827.8 kips
3685.1 kN (φ = 0.90)Flange Slenderness (λf = bf / 2tf)
2.38
✓ Compact Flange (λf ≤ 9.15)Web Slenderness (λw = h / tw)
12.1
✓ Compact Web (λw ≤ 90.5)