(5) Predetermined procedures for initiating quick response from the OCC during fire.
Fans not designed to function during fire shall shut down automatically upon activation of the emergency ventilation system unless it can be proven that the emergency air flow is not jeopardised or conflicted with.
d. Fan temperature rating
Emergency ventilation fans, their motors and all related components exposed to the exhaust airflow shall be capable of operating in an atmosphere of 250ºC for at least 2 hrs.
Emergency ventilation fan motors shall be designed to achieve their full operating speed in 30 secs or less from a stopped position when started across the line and in 60 secs or less for variable speed motors
f. Fan motor starters and protective devices
Local fan motor starters and related operating control devices shall be located as far away from the direct air stream of the fans. Thermal overload protective devices shall not be used on motor control of fans used for emergency ventilation
h. Fail-safe replacement air
Smoke barrier shall be provided above platform screen doors. The materials used for the construction of the smoke barrier shall have a fire resistance rating of at least 2 hrs.
E
i. Smoke barrier