Airport pavements have seen a fast increase in frequency and weight of aircraft due to a growth in number of passengers. To cope with such a growth aircraft manufacturer design new aircraft types capable of transporting more passengers. This results in an increase in gross weight of the new aircraft types. An increase in the number of tires and landing gears is used to restrict the maximum load per wheel, which resulted in the dual-tridem gear lay-out of the B777 and the use of tridem gears for the Airbus A380. The international accepted design methods of ICAO [1] and FAA [2,3] have not been able to keep pace with this tendency in aircraft design. A discussion regarding this problem was started based on the ACN (Aircraft Classification Number) to be assigned to the B777. The core of this discussion is attributed to the lack of knowledge of the interaction between six wheels in one single landing gear. The construction of the National Airport Pavement Test Facility (NAPTF) in Atlantic City is based on the need for developing new design procedures for the new B777 and A380 type of aircraft.