AISC 360-22ASTM A992 / A6W8 Series
AISC W8x13 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 | 13 lb/ft | 19.3 kg/m |
| Cross-Sectional Area | A | 3.84 in² | 2477 mm² |
| Overall Depth | d | 7.99 in | 202.9 mm |
| Flange Width | bf | 4 in | 101.6 mm |
| Flange Thickness | tf | 0.255 in | 6.5 mm |
| Web Thickness | tw | 0.23 in | 5.8 mm |
| Flange Centroid Distance | ho | 7.74 in | 196.6 mm |
Bending & Buckling Properties
| Property | Symbol | Imperial (US) | Metric (SI) |
|---|---|---|---|
| Strong-Axis Inertia | Ix | 39.6 in⁴ | 16.5 ×10⁶ mm⁴ |
| Strong-Axis Elastic Modulus | Sx | 9.9 in³ | 162 ×10³ mm³ |
| Strong-Axis Plastic Modulus | Zx | 11.4 in³ | 187 ×10³ mm³ |
| Strong-Axis Radius of Gyration | rx | 3.21 in | 81.5 mm |
| Weak-Axis Inertia | Iy | 2.7 in⁴ | 1.1 ×10⁶ mm⁴ |
| Weak-Axis Elastic Modulus | Sy | 1.4 in³ | 22 ×10³ mm³ |
| Weak-Axis Plastic Modulus | Zy | 2.2 in³ | 35 ×10³ mm³ |
| Weak-Axis Radius of Gyration | ry | 0.84 in | 21.4 mm |
| Torsional Constant | J | 0.087 in⁴ | 36 ×10³ mm⁴ |
| Warping Constant | Cw | 64.2 in⁶ | 11 ×10⁹ mm⁶ |
| Effective Radius of Gyration | rts | 1.03 in | 26.2 mm |
AISC 360-22 Design Capacities (Fy = 50 ksi / 345 MPa)
Plastic Moment Capacity (φMp)
42.8 kip-ft
58 kN·m (φ = 0.90)Nominal Shear Capacity (φVn)
49.6 kips
220.9 kN (φ = 0.90)Flange Slenderness (λf = bf / 2tf)
7.84
✓ Compact Flange (λf ≤ 9.15)Web Slenderness (λw = h / tw)
32.5
✓ Compact Web (λw ≤ 90.5)