Performance evaluation of staircase pressurisation systems

Pao Yue-kong Library Electronic Theses Database

Performance evaluation of staircase pressurisation systems


Author: Leung, Che-hung
Title: Performance evaluation of staircase pressurisation systems
Degree: M.Sc.
Year: 1996
Subject: Smoke prevention
Fire prevention
Hong Kong Polytechnic University -- Dissertations
Department: Multi-disciplinary Studies
Pages: xi, 116, [55] p. : ill. ; 30 cm
Language: English
InnoPac Record:
Abstract: The demand of using staircase pressurisation techniques against the ingress of smoke from the fire place grows steady since the seventies, e.g. BS 5588 : Part 4 : 1978. Such requirement became a statutory pre-requisite for building occupation since the introduction of revised Code of Practice for Minimum Fire Services Installation and Equipment in 1987. However there was a 'grey' period between the year of 1978 and 1987. Developers were allowed to choose whether they would spend money to have better fire safety emergency systems in their buildings, or use the minimum cost approach to just follow the regulations at that time. The performance of ten staircase pressurisation systems with construction designed and commenced within the grey period were examined in the dissertation. Those systems met only the basic requirements but did not satisfy the full requirement of B.S. 5588. In testing the systems, the pressure differentials measured between the staircase and the accommodation areas, at the mid - level of the building were recorded in 5 s interval until the steady state was reached. The computer simulation programme - Analysis of Smoke Control Systems (ASCOS) was adopted to simulate the system's performance and, to predict the variation of pressure differential in all floors. The changes required to meet the current statutory requirements and some recommendations to improve the installed systems were also discussed. As the statutory requirement was enforced in 1987, many staircase pressurisation systems were installed after that year. A general survey was conducted to collect views of the designers on the requirements as well as to consolidate their experience on the design of staircase pressurisation systems after the regulation was enforced. Respondents were also asked whether they have designed staircase pressurisation system before 1987, to see whether local engineers were aware of the systems.

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