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Stair pressurization systems for smoke control: design considerations

From National Research Council Canada

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Affiliation
  1. National Research Council of Canada
FormatText, Article
Subjectpressurization; stair wells; smoke controls; emergency exits; building codes; literature review; stair use; building evacuation; code requirements; 10-story fire tower; non-fire tests; fire tests; smoke backflow prevention; critical velocity pressures; Smoke management; Indoor air; pressurisation; cage d'escalier; régulateur de fumée; sortie de secours; code du bâtiment
Abstract
Literature on the various types of pressurization systems, stair use during evacuation, and code requirements was reviewed and summarized. Non-fire and fire tests were conducted in the 10-story experimental fire tower of the National Fire Laboratory of the National Research Council of Canada. The flow resistances of an open stair door at various angles were measured. Under fire conditions, the vertical profiles of pressure differences across the stairshaft wall and those of the velocity pressure at the stair door opening were measured. With the stairshaft pressurized, the critical velocities required to prevent smoke backflow at the stair door opening on the fire floor were determined and compared with the calculated values for various fire temperatures.
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  • ASHRAE Transactions 95, no. 2 (1989): 184–192.
NotePresented at the 1989 ASHRAE Annual Meeting, Vancouver, BC, Canada, June 24-28, 1989
LanguageEnglish
Peer reviewedYes
IdentifierIRC-P-1618
NRC numberNRCC 30896
NRC-IRC-3981
NPARC number20375155
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Record identifier6028e259-0573-48fa-8982-15c371da15ca
Record created2012-07-23
Record modified2020-06-06
Date modified: