Fire Code of the Philippines Ebook - SafetySignsPH.com Fire Code of the Philippines eBook - SafetySignsPH | Page 106

Section 10.2.6.5 of this IRR, escalator opening may be protected by
anyone of the methods as described in paragraph C through E below.
C. Sprinkler Vent Method
1. Under the conditions specified in paragraph B (1) above, escalator
openings may be protected by the "sprinkler-vent" method, consisting
of a combination of an automatic or smoke detection system,
automatic exhaust system and an automatic water curtain meeting
the design and other requirements as specified in this succeeding
sections.
2. The exhaust system shall be of such capacity as to create a downdraft
through the escalator floor opening. The downdraft has an average
velocity of not less than ninety one and half meters per minute (91.5
m/min) under normal conditions for a period of not less than thirty (30)
minutes.
3. Operation of the exhaust system for any floor opening shall be initiated
by an approved device in the storey involved and shall be any one of
the following means in addition to a manual means of opening and
testing the system.
a. Thermostats - fixed temperature, rate-of-rise, or a combination of
both.
b. Water flow in the sprinkler system.
c. Approved supervised smoke detection. Smoke detection devices,
if used, shall be located that the presence of smoke is detected
before it enters the stairway.
4. Electric power supply to all parts of the exhaust system and its control
devices shall be designed and installed for maximum reliability.
5. Any fan or duct used in connection with an automatic exhaust system
shall be of the approved type (mechanical and electrical codes)and
shall be installed and maintained in accordance with good
engineering practice.
6. Periodic tests, not less frequently than quarterly, shall be made of the
automatic exhaust system to maintain the system and the control de-
vices in good working conditions.
7. The water curtain shall be formed by open sprinklers or spray nozzles so
located and spaced as to form a complete and continuous barrier
along all exposed sides of the floor opening and reaching from the
ceiling to the floor. Water intensity for water curtain shall be not less
than approximately thirty seven and one-fourth liters per minute (37.25
90