NFPA 13R 2010
6.4.6.3.2 Pendent Sprinklers.
6.4.6.3.2.1 Pendent sprinklers shall be located at least 3 ft (914 mm) from obstructions such as ceiling fans and light fixtures unless the requirements of 6.4.6.3.4 are met.
Is the reason for the added distance away from an obstrucion is because you are wetting more than the floor???? and the spray could be thrown off.
6.4.6.3.2 Pendent Sprinklers.
6.4.6.3.2.1 Pendent sprinklers shall be located at least 3 ft (914 mm) from obstructions such as ceiling fans and light fixtures unless the requirements of 6.4.6.3.4 are met.
Is the reason for the added distance away from an obstrucion is because you are wetting more than the floor???? and the spray could be thrown off.