AAR Classifications
| Class | Description | Class | Description |
|---|---|---|---|
| RA | Brine-tank ice bunkers | RPB | Mechanical refrigerator with electro-mechanical axle drive |
| RAM | Brine-tank ice bunkers with beef rails | RPL | Mechanical refrigerator with loading devices |
| RAMH | Brine-tank with beef rails and heaters | RPM | Mechanical refrigerator with beef rails |
| RB | No ice bunkers — heavy insulation | RS | Bunker refrigerator — common ice bunker car |
| RBL | No ice bunkers and loading devices | RSB | Bunker refrigerator — air fans and loading devices |
| RBH | No ice bunkers — gas heaters | RSM | Bunker refrigerator with beef rails |
| RBLH | No ice bunkers — loading devices and heaters | RSMH | Bunker refrigerator with beef rails and heaters |
| RCD | Solid carbon-dioxide refrigerator | RSTC | Bunker refrigerator — electric air fans |
| RLO | Special car type — permanently enclosed (covered hopper type) | RSTM | Bunker refrigerator — electric air fans and beef rails |
| RP | Mechanical refrigerator |
- Note: Class B refrigerator cars are those designed for passenger service; insulated boxcars are designated Class L.
Read more about this topic: Refrigerator Car