What type of buildings are exempt from having an automatic sprinkler system if they have one or more stories with an occupant load of 30 or more and located 55'?

Buildings that are considered exempt from having an automatic sprinkler system often fall under specific categories defined by building codes. One such category includes open parking structures, which typically do not have the same risks associated with fire as other types of buildings. These structures are often designed using non-combustible materials and have no enclosed spaces where fire can spread.

Similarly, Group F-2 occupancies, which pertain to low-hazard industrial facilities, can also be exempt from having sprinkler systems depending on certain factors such as occupant load and building height. These building types are viewed as lower risk, primarily because of their intended usage and design characteristics.

In this scenario, both open parking structures and Group F-2 occupancies meet the criteria outlined in the question, which allows them to be exempt from the automatic sprinkler system requirement when certain conditions regarding stories and occupant load are met. Therefore, the correct answer encompasses both categories, acknowledging their shared exemptions under the relevant building codes.