There were two sets of the hangar deck. One, for the live actors, was the "Coming to America" throne room, as has been discussed earlier. But, there was also a miniature hanger deck as well. It was mainly used in the barricade effects sequence.
If I remember correctly, and I'm having to dig back over 20 years to remember it, for this one, the hangar itself was roughly 18 feet long, and about five to six feet wide. It was actually fairly detailed too, down to the hexagonal cargo palettes and a control room on the second level. (Essentially where Scotty was during the barricade scene)
There were also at least two scale models of the shuttlecraft, probably two feet long. At least one was destroyed during the filming of the crash landing.
.....
I thought the miniature Hangar set was good too.