If your vehicle doesn't have racks to hold cylinders, the cargo space floor must be flat. In racks attached to the vehicle. In boxes that will keep them from turning over. Never transport these materials in containers with interconnections. The shipper labels these packages Radioactive II or Radioactive III, and prints the package's transport index on the label.
Radiation surrounds each package, passing through all nearby packages.
To deal with this problem, the number of packages you can load together is controlled. Their closeness to people, animals, and unexposed film is also controlled. The transport index tells the degree of control needed during transportation. The total transport index of all packages in a single vehicle must not exceed 50. Appendix A to this section shows rules for each transport index.