Taxiway / Apron strength

[Saintsman]

Would somebody be kind enough to explain what the following figures mean wrt taxiway / apron strength:

46/F/B/X/U

22/F/C/Y/U

Thanks

[extreme P]

22/F/C/Y/U

22 is the pavement classification number. Scale starts at zero and has no upper limit.
F is pavement type. Can be Rigid or Flexible.
C is the pavement sub category. Ranges A to D, high to ultra low.
Y is tyre pressure. W to Z, high to very low.
U is evaluation method to determine pavement quality. Technical or User.

[Saintsman]

Thanks for the info eP