In vehicles transporting Division 1.1, 1.2, or 1.3 materials, the portion of the interior in contact with the load must be lined with _________.

Precautions for Specific Hazards
Explosives:
- Turn off your engine before loading or unloading any explosives. Then check the cargo space.
- Disable cargo heaters. Disconnect heater power sources and drain heater fuel tanks.
- Make sure there are no sharp points that might damage cargo. Look for bolts, screws, nails, broken side panels and broken floor boards.
Vehicles transporting Division 1.1, 1.2, or 1.3 (explosive) materials must have tight floors with that portion of the interior in contact with the load lined with non-metallic material on non-ferrous metals.