On SSP, user Cage had this to say about the int'l terminal:
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Originally Posted by Cage
International terminal is big for the following reasons:
(1) CAA originally had plans to extend concourse B/C as a cheap way to add gate capacity. However they ran into capacity problem with the central processor functions of CBSA, US CBP Pre-clearance, CATSA security, post security food court, etc. The international terminal fixes this issue by greatly expanding central processor functions such that follow on expansion will be to add a hammerhead onto the transborder pier.
(2) wingspans are going in one direction, longer. My prediction is the folding wingtip idea for the 777X will be just like the same thing as original 777-200. Early development of the 777 had folding wing because the airplane had to have been performance but early requirements were to fit within the same dimensions as DC10. Eventually the airlines figured out that weight of the fold wingtip significantly reduced the performance of the 777 and the option was never ordered.
(3) YYC is at maximum capacity for swing gates with B/C20-23 and C/D31-34 plus four gates on the D concourse. Any attempt to move international and transborder operations will reduce the ability to conduct swing gate operations. Consequently the new terminal must be overbuilt to account for the loss of utilization capability (where 1 gate could handle dual purpose, now 2 gates at single purpose are required).
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