Enclosure. All shafts shall be enclosed as required
by sections of this code for exits, except elevator and supplemental
stairway shafts which are immediately adjacent to and not separated
from floor openings connecting the same floors served by the shaft.
The opening protectives shall provide a substantial barrier to fire
penetration. Building service shafts such as trash chutes, utility
and duct shafts shall be enclosed as required by this code.
All means of egress shall be equipped with artificial
lighting in accordance with the building code. Emergency lighting
shall be provided in accordance with the building code.
All exits shall be indicated with exit signs
in accordance with the building code.
A sign shall be provided at each floor landing
in all interior stairways more than three stories above grade, designating
the floor level above the floor of discharge. All elevator lobby call
stations on all floor levels in buildings more than 75 feet (22,860
millimeters) above grade shall be marked with approved signs reading
as follows: "Use Stairways in Case of Fire — Do Not
Use Elevators."
All buildings having floors used for human occupancy
served by elevators shall have at least one elevator equipped with
emergency controls, and all elevators shall be equipped with car recall
activated by a smoke detector in each lobby in accordance with the
building code.
Smoke and heat detection. Each recirculating
air or exhaust system which serves more than one floor in buildings
which exceed six stories in height shall be equipped with approved
smoke and heat detection devices in accordance with the mechanical
code. The devices shall stop the fan(s) automatically and shall be
of the manual reset type. Automatic fan shutdown is not required when
the system is part of an approved smoke removal or control system.