The building alarm system functions as a “high rise package”; if the alarm is activated on a floor the alarm will engage on that floor and the floor above and floor below. Any time the alarm is activated on your floor you should evacuate. Because of the atrium you may hear the alarm from another floor or see the strobes on another floor - you should use your judgment in deciding to evacuate or not.
The building alarm can be activated by pull stations located adjacent to the stairs and at the primary building exits, smoke detector located in the primary air handling units, elevator lobbies and atrium. Fans will activate in the stairways to deter smoke intrusion and in the atrium to evacuate smoke.
The building is equipped with a sprinkler system; this system is activated by sensing heat; if the sprinkler system activates it will trigger the building alarm in the manner described above (high rise package). Additional sprinkler heads could activate as the heat spreads.