The minimum diameters of axles for various axle loads shall be as follows:
Axle load (in pounds) | Minimum diameter of journal (in inches) | Minimum diameter of wheel seat (in inches) | Minimum diameter of center (in inches) |
50000 | 51/2 | 73/8 | 67/16 |
38000 | 5 | 63/4 | 57/8 |
31000 | 41/2 | 61/4 | 55/16 |
22000 | 33/4 | 5 | 43/8 |
15000 | 31/4 | 45/8 | 37/8 |
49 C.F.R. §230.99