The code is painted in dark blue letters on a white ground in the upper front corners of the equipment, with the month and year the approval expires beneath it. Each letter has a fixed position:

  • 1st letter, equipment type: I insulated only, R cooled by ice, eutectic plates or dry ice, F mechanically refrigerated, C heated.
  • 2nd letter, insulation: N normal (K no more than 0.70 W/m²K), R heavy (K no more than 0.40 W/m²K).
  • 3rd letter, class for mechanical refrigeration: A any temperature from +12 to 0 °C, B from +12 to -10 °C, C from +12 to -20 °C; D, E and F hold 0, -10 and -20 °C or colder respectively.

So FRC is heavily insulated mechanically refrigerated equipment able to hold an empty body at -20 °C at a mean outside temperature of +30 °C; it is the code to look for with frozen loads. FNA, with normal insulation, holds only 0 to +12 °C and is meant for fresh goods.

ATP classes are issued to containers and insulated transport boxes as well as to vehicles. The GEBHARDT Isotec TBX is ATP- and HACCP-certified, and GEBHARDT designs it for use on standard dry-freight trucks.