Category Letters
The following table contains the complete list of standard category letters. Letters A, B, C, D, P and W are reserved for coaches. However, also S is used for coaches and this doubles a goods wagons class. These are covered in detail in the article on UIC classification of railway coaches. Each goods wagons type is given a type number, whose first digit forms the fifth digit of the 12-digit UIC wagon number.
| Class | Wagon type | 1st digit of type number |
|---|---|---|
| E | Ordinary open high-sided wagon | 5 |
| F | Special open high-sided wagon | 6 |
| G | Ordinary covered wagon | 1 |
| H | Special covered wagon | 2 |
| I | Refrigerated van | 8 |
| K | Ordinary flat wagon with separate axles | 3 |
| L | Special flat wagon with separate axles | 4 |
| O | Open multi-purpose wagon (composite open high-sided flat wagon) | 3 |
| R | Ordinary flat wagon with bogies | 3 |
| S | Special flat wagon with bogies | 4 |
| T | Goods wagon with opening roof | 0 (before 1988: 5) |
| U | Special wagons | 9 |
| Z | Tank wagon | 7 |
Read more about this topic: UIC Classification Of Goods Wagons
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