According to a builder who was working on the YBAF terminal several years ago, these buildings (and sure he mentioned one or two overseas as well) were all built off the same plan to military specifications and were designed to be able to take an artillery round or similar and remain standing long enough to be evacuated before it collapsed in on itself. Apparently the Archerfield building simulated a carrier deck alongside the tower (? Dunno, just what I was told) with the "Admiral" (CO?) and his family residing on one of the floors.