Originally Posted by
rickair7777
The pavement has to be thick enough to hold a widebody...big-airport runways are probably 6-10feet thick concrete.
Closer to ~16 inches.
There's obviously a softer base underneath that, but not really a requirement for a single landing and maybe a departure.
The ~16" thickness is so that the runway doesn't have to be replaced so often. You could go much much thinner for a one-time use.