The taxi-way system includes the following: 1  A parallel taxi-way 30 metres wide designated P. 2  Link taxiways 30 metres wide marked Q , W , Y & Z. 3  Holding bays at every intersection to the runway.  Loop taxi-ways at both ends of the runways.
Although concrete gains strength more slowly at lower temperatures, the strength of concrete cured at will eventually reach that of concrete cured at 70Â°F. Even if the concrete temperature drops to the mid teens, the hydration process will continue a very slow rate.
Concrete will start hardening in 45 minutes or less in warm weather (in up to 90 minutes in cool weather). But even though the hardening (technically known as curing) process begins quickly, you should leave the posts undisturbed for at least two days after pouring the concrete.