TM 9-2320-209-10-1 1-7. MANUAL ORGANIZATION. This manual is divided into four volumes. Volumes are divided into chapters and sections depending on the amount of subject material. The content of each volume is as follows: Volume 1. TM 9-2320-209-10-1, Operation, Installation, and Reference Data. Volume 2. TM 9-2320-209-10-2, Scheduled Maintenance. Volume 3. TM 9-2320-209-10-3, Troubleshooting. Volume 4. TM 9-2320-209-10-4, Maintenance. 1-8. VEHICLE /BRIDGE CLASSIFICATION. Refer to table 1-1 and find your vehicle class number. Table columns are marked as follows: E - Class number of vehicle with no payload. C - Class number of vehicle with cross-country payload. H - Class number of vehicle with highway payload. a. Bridges along your route may be marked with a class number. The bridge class number shows the-safe capacity of the bridge. If your vehicle class number is equal to or less than the bridge class number, the bridge will hold your vehicle. If your vehicle class number is greater than the bridge class number, your vehicle is too heavy for the bridge; DO NOT CROSS. b. For more information refer to FM 5-36. Table 1-1. Vehicle Class Information 1-6