Calculate the Ci, and duration required for a 210-ft by 450-ft five-story residential condominium. The structure is of fire-resistive construction with all interior vertical openings protected by self-closing class B fire doors. A second identical building is located next to this building with the 450-ft walls containing unprotected openings facing each other 90 ft apart, but without a communication passageway. Calculate the NFF including exposure of the second building. II two hydrants are within 120 ft of the building, does this reduce the NFF? Are automatic sprinkler systems in the buildings justified?
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