Fire tower definition

Fire tower means an enclosed staircase which can only be approached from the various floors through landings or lobbies separated from both the floor area and the staircase by fire-resisting doors and open to the outer air.
Fire tower means an enclosed staircase that can only be approached from the various floors through landings or lobbies separated from both the floor area and the staircase by fire resistant doors;
Fire tower means the fire tower of the Building located in the area shown hatched on Exhibit X- 10 hereto.