AISC 360-22ASTM A992 / A6W18 Series
AISC W18x76 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 | 76 lb/ft | 113.1 kg/m |
| Cross-Sectional Area | A | 22.3 in² | 14387 mm² |
| Overall Depth | d | 18.2 in | 462.3 mm |
| Flange Width | bf | 11 in | 279.4 mm |
| Flange Thickness | tf | 0.68 in | 17.3 mm |
| Web Thickness | tw | 0.425 in | 10.8 mm |
| Flange Centroid Distance | ho | 17.5 in | 444.5 mm |
Bending & Buckling Properties
| Property | Symbol | Imperial (US) | Metric (SI) |
|---|---|---|---|
| Strong-Axis Inertia | Ix | 1330 in⁴ | 553.6 ×10⁶ mm⁴ |
| Strong-Axis Elastic Modulus | Sx | 146 in³ | 2393 ×10³ mm³ |
| Strong-Axis Plastic Modulus | Zx | 163 in³ | 2671 ×10³ mm³ |
| Strong-Axis Radius of Gyration | rx | 7.73 in | 196.3 mm |
| Weak-Axis Inertia | Iy | 152 in⁴ | 63.3 ×10⁶ mm⁴ |
| Weak-Axis Elastic Modulus | Sy | 27.6 in³ | 452 ×10³ mm³ |
| Weak-Axis Plastic Modulus | Zy | 42.2 in³ | 692 ×10³ mm³ |
| Weak-Axis Radius of Gyration | ry | 2.61 in | 66.3 mm |
| Torsional Constant | J | 2.83 in⁴ | 1178 ×10³ mm⁴ |
| Warping Constant | Cw | 18415.1 in⁶ | 3141.9 ×10⁹ mm⁶ |
| Effective Radius of Gyration | rts | 3.02 in | 76.7 mm |
AISC 360-22 Design Capacities (Fy = 50 ksi / 345 MPa)
Plastic Moment Capacity (φMp)
611.3 kip-ft
829.4 kN·m (φ = 0.90)Nominal Shear Capacity (φVn)
208.8 kips
929.7 kN (φ = 0.90)Flange Slenderness (λf = bf / 2tf)
8.09
✓ Compact Flange (λf ≤ 9.15)Web Slenderness (λw = h / tw)
39.6
✓ Compact Web (λw ≤ 90.5)