The four axle 446Z type flat car is used for transportation of 10’, 20’, 30’, 40’ containers up to 8.5' high, as well as PN-ISO 668:1999, UIC 592-1 and UIC 592-2 compliant. The car may also carry UIC 592-4 compliant swap bodies.
| A | B | C | D | |
| S | 44,2 t | 52,5 t | 62,2 t | 70,2 t |
| SS | 44,2 t | 52,5 t | 60,2 t | |
Specification
| Empty car speed [km/h] | 120 |
| Loaded car speed, axle load 20 t/axle [km/h] | 120 |
| Loaded car speed, axle load 22.5 t/axle [km/h] | 100 |
| Tare weight [t] | 19,8 |
| Carrying capacity [t] | 60,2 (SS) 70,2(S) |
| Length over buffers [mm] | 19740 |
| Loading space distance from the rail level [mm] | 1155 |
| Bogie type | Y25Ls(s)d1-K |
| Brake system | Knorr |