Perforated ceilings shall be permitted to be used
for air supply within the limitations of this section. Exit corridors,
where required to be of fire-resistive construction by the
building code, shall not have ventilating ceilings.
[OSHPD 1, 2, 3 & 4] Ventilating ceilings are not
permitted in health facilities.
Ventilating ceilings shall comply with
the following:
- Suspended ventilating ceiling material shall have a Class 1 flame-spread classification on both sides, determined in accordance with the building code. Suspended ventilating ceiling supports shall be of noncombustible materials.
- Lighting fixtures recessed into ventilating ceilings shall be of a type approved for that purpose.