AISC 360-22ASTM A992 / A6W6 Series
AISC W6x20 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 | 20 lb/ft | 29.8 kg/m |
| Cross-Sectional Area | A | 5.87 in² | 3787 mm² |
| Overall Depth | d | 6.2 in | 157.5 mm |
| Flange Width | bf | 6.02 in | 152.9 mm |
| Flange Thickness | tf | 0.365 in | 9.3 mm |
| Web Thickness | tw | 0.26 in | 6.6 mm |
| Flange Centroid Distance | ho | 5.84 in | 148.3 mm |
Bending & Buckling Properties
| Property | Symbol | Imperial (US) | Metric (SI) |
|---|---|---|---|
| Strong-Axis Inertia | Ix | 41.4 in⁴ | 17.2 ×10⁶ mm⁴ |
| Strong-Axis Elastic Modulus | Sx | 13.4 in³ | 220 ×10³ mm³ |
| Strong-Axis Plastic Modulus | Zx | 14.9 in³ | 244 ×10³ mm³ |
| Strong-Axis Radius of Gyration | rx | 2.66 in | 67.6 mm |
| Weak-Axis Inertia | Iy | 13.3 in⁴ | 5.5 ×10⁶ mm⁴ |
| Weak-Axis Elastic Modulus | Sy | 4.4 in³ | 72 ×10³ mm³ |
| Weak-Axis Plastic Modulus | Zy | 6.7 in³ | 110 ×10³ mm³ |
| Weak-Axis Radius of Gyration | ry | 1.5 in | 38.1 mm |
| Torsional Constant | J | 0.24 in⁴ | 100 ×10³ mm⁴ |
| Warping Constant | Cw | 177.9 in⁶ | 30.3 ×10⁹ mm⁶ |
| Effective Radius of Gyration | rts | 1.7 in | 43.2 mm |
AISC 360-22 Design Capacities (Fy = 50 ksi / 345 MPa)
Plastic Moment Capacity (φMp)
55.9 kip-ft
75.8 kN·m (φ = 0.90)Nominal Shear Capacity (φVn)
43.5 kips
193.8 kN (φ = 0.90)Flange Slenderness (λf = bf / 2tf)
8.25
✓ Compact Flange (λf ≤ 9.15)Web Slenderness (λw = h / tw)
21
✓ Compact Web (λw ≤ 90.5)