Other Impairments of Automatic Sprinklers
Inadequate clearance to storage
There must be at least 18 inches of clearance between the deflector and the top of anything stored below the sprinkler. Anything closer than 18 inches will block the flow of water to the fire and reduce the effectiveness of the sprinkler system.
Misuse of piping
Occupants of a sprinklered building must not use the piping for any other purpose, such as hanging objects from it.
Hanging objects could block the flow of water or damage the piping.