Fire alarm pull stations shall be located near the exits throughout the protected area sothat they are conspicuous, unobstructed, and accessible. Activating the pull station isthe most effective way to notify the building occupants in case of a fire emergency.There must be at least one manual fire alarm station on each floor of a building exceptresidential buildings. Manual fire alarm pull stations should be of contrasting color tothe background on which they are mounted. Approved plastic covers are permitted toprotect fire alarm manual pull stations and provide relief from false alarms. There aretwo types of manual fire alarm pull stations. They are called single action and doubleaction stations