LOAD CLASSIFICATION NUMBER (LCN)
AT SOME AIRPORTS THE BEARING STRENGTH OF RUNWAY PAVEMENT IS DEFINED BY LCN (FLEXIBLE OR RIGID PAVEMENT).
THE LCN HAS TO BE DETERMINED FOR A GIVEN AIRCRAFT AND COMPARED WITH SPECIFIC RUNWAY LCN.
NORMALLY THE LCN OF AN AIRCRAFT SHOULD NOT EXCEED THAT OF THE RUNWAY.HOWEVER PREARRANGED EXCEPTIONS MAY BE ALLOWED BY AIRPORT AUTHORITIES AS PER ICAO GUIDE LINESFOR PAVEMENT LCN OVERLOAD CRITERIA.