AISC 360-22ASTM A992 / A6W18 Series
AISC W18x158 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 | 158 lb/ft | 235.1 kg/m |
| Cross-Sectional Area | A | 46.3 in² | 29871 mm² |
| Overall Depth | d | 19.7 in | 500.4 mm |
| Flange Width | bf | 11.3 in | 287 mm |
| Flange Thickness | tf | 1.44 in | 36.6 mm |
| Web Thickness | tw | 0.81 in | 20.6 mm |
| Flange Centroid Distance | ho | 18.3 in | 464.8 mm |
Bending & Buckling Properties
| Property | Symbol | Imperial (US) | Metric (SI) |
|---|---|---|---|
| Strong-Axis Inertia | Ix | 3060 in⁴ | 1273.7 ×10⁶ mm⁴ |
| Strong-Axis Elastic Modulus | Sx | 310 in³ | 5080 ×10³ mm³ |
| Strong-Axis Plastic Modulus | Zx | 356 in³ | 5834 ×10³ mm³ |
| Strong-Axis Radius of Gyration | rx | 8.12 in | 206.2 mm |
| Weak-Axis Inertia | Iy | 347 in⁴ | 144.4 ×10⁶ mm⁴ |
| Weak-Axis Elastic Modulus | Sy | 61.4 in³ | 1006 ×10³ mm³ |
| Weak-Axis Plastic Modulus | Zy | 94.8 in³ | 1553 ×10³ mm³ |
| Weak-Axis Radius of Gyration | ry | 2.74 in | 69.6 mm |
| Torsional Constant | J | 25.2 in⁴ | 10489 ×10³ mm⁴ |
| Warping Constant | Cw | 45644.2 in⁶ | 7787.5 ×10⁹ mm⁶ |
| Effective Radius of Gyration | rts | 3.2 in | 81.3 mm |
AISC 360-22 Design Capacities (Fy = 50 ksi / 345 MPa)
Plastic Moment Capacity (φMp)
1335 kip-ft
1811.4 kN·m (φ = 0.90)Nominal Shear Capacity (φVn)
430.8 kips
1917.9 kN (φ = 0.90)Flange Slenderness (λf = bf / 2tf)
3.92
✓ Compact Flange (λf ≤ 9.15)Web Slenderness (λw = h / tw)
20.8
✓ Compact Web (λw ≤ 90.5)