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 IBC has required exit stairways in high-rise buildings to be protected as smokeproof enclosures or pressurized stairways since its inception.
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.