smokeproof enclosure

smokeproof enclosure

A fully-enclosed, ventilated vestibule that is sufficiently above atmospheric pressure so as to provide a smokeless safe passage in the event of a fire.
References in periodicals archive ?
The smokeproof enclosure and associated vestibules must consist of 2-hour fire resistant construction and the stairway must be positively pressurized to a minimum 0.
As an alternative to smokeproof enclosures, pressurized stairways can be used in sprinkler protected buildings without incorporating the ventilated vestibule.
Smokeproof enclosures can provide a more robust solution to prevent pressure drops due to the effect of open doors.