square nozzle arrangement and draw the picture of the automatic sprinkler system. In automatic fire detection system, that the office building belong to level 2 protection object, shall apply to regional alarm system, according to different height and function room choice fire extinguisher type. Determine first probe protection area and protect radius R, calculated the number needed detector, again through the ultimate test curve. The final determination of the room number all the probe.
Key Words: office building; fire control system ; fire hydrant; automatic fire alarm