A structural system that consists of a relatively thin concrete slab over a light-gauge metal-form deck, with closely spaced bar joists supported by steel girders. This system may be well suited for general office and retail uses, but it is not typically used in parking garages due to the loading requirements and exposure characteristics of a parking structure. When bar joists floor systems are subjected to the high point loads of vehicle wheels, the systems tend to exhibit undesirable deflections that cause the thin slabs to deteriorate.