You will not find many commercial structures whether private or public buildings without drop ceiling and suspended ceiling tiles in the modern world, the internal fit out will most likely have plasterboard linings to the perimeters, stud partitions and glazed screens as room dividers and drywall bulkheads window linings as well as dry lining to toilet areas, staircases, stores and canteens.
Suspended Ceiling Panels
Just about all types of suspended ceiling panels and plasterboards can and do end up being specified throughout a single building, this of course is due to the many European and home grown rules and regulations governing the specification of different areas of any building.
Toilet and wet areas in general require moisture resistant ceiling grid, tiles and plasterboard, stairways need escape times far in excess of say a ground floor room with doors to the exterior within a few strides.
So a cracked ceiling stairwell will need fire resistant fireline plasterboards which will give depending on the specific requirements between one and two hours fire protection. As opposed to basic wallboard that gives just 1/2 hour rating.
This applies for most buildings such as educational (schools, colleges, universities and training establishments) commercial (offices, shops, showrooms, supermarkets and distribution depots) health (hospitals, clinics, training facilities and recovery units) Government and local authority buildings, transport like (bus and railway stations, airports, garages, and workshops)