Fire Code of the Philippines Ebook - SafetySignsPH.com Fire Code of the Philippines eBook - SafetySignsPH | Page 88

opened by a force of 133 N in accordance with Section 10.2.5.3 of
this IRR.
b. Equipment and ductwork for stair pressurization shall be located in
accordance with one of the following specifications:
i.
Exterior to the building and directly connected to the stairway
by ductwork enclosed in noncombustible construction
ii. Within the stair enclosure with intake and exhaust air vented
directly to the outside or through ductwork enclosed by a 2-
hour fire-resistive rating
III. Within the building under the following conditions:
iii.a. Where the equipment and ductwork are separated from
the remainder of the building, including other mechanical
equipment, by a 2-hour fire-resistive rating.
iii.b. Where the building, including the stairway enclosure, is
protected throughout by an approved, supervised
automatic sprinkler system and the equipment and
ductwork are separated from the remainder of the
building, including other mechanical equipment, by not
less than a 1-hour fire-resistive rating
c. In all cases specified by para “I” 9(a) through (b) of this Section,
openings into the required fire resistance–rated construction shall
be limited to those needed for maintenance and operation and
shall be protected by self-closing fire protection–rated devices.
10. Activation of Mechanical Ventilation and Pressurized Stair Systems
a. For both mechanical ventilation and pressurized stair enclosure
systems, the activation of the systems shall be initiated by a smoke
detector installed in an approved location within three meters (3
m) of the entrance to the smokeproof enclosure.
b. The required mechanical system shall operate upon the activation
of the smoke detectors specified in para “I” 10(a) above and by
manual controls accessible to the fire department. The required
system also shall be initiated by the following, if provided:
i.
Water flow signal from a complete automatic sprinkler system;
or
II. General evacuation alarm signal.
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