https://www.designingbuildings.co.uk/w/index.php?action=history&feed=atom&title=Open_state_cavity_barrier 2026-04-29T04:05:16Z Revision history for this page on the wiki MediaWiki 1.17.4 https://www.designingbuildings.co.uk/w/index.php?title=Open_state_cavity_barrier&diff=293494&oldid=prev 2025-01-14T07:29:59Z

<p>Created page with &quot;[https://www.bsigroup.com/en-GB/insights-and-media/insights/brochures/pas-9980-fire-risk-appraisal-of-external-walls-and-cladding-of-flats/ PAS 9980:2022, Fire risk appraisal of ...&quot;</p> <p><b>New page</b></p><div>[https://www.bsigroup.com/en-GB/insights-and-media/insights/brochures/pas-9980-fire-risk-appraisal-of-external-walls-and-cladding-of-flats/ PAS 9980:2022, Fire risk appraisal of external wall construction and cladding of existing blocks of flats – Code of practice], published by bsi in January 2022, defines an open state cavity barrier as a: ‘nonloadbearing element designed to provide fire separation in a concealed space (cavity), which is open to allow ventilation and drainage in the cold state, but which closes when exposed to a developing fire.’<br /> <br /> It defines a closed state cavity barrier as a: ‘nonloadbearing element designed to provide fire separation within or at the edges of a concealed space (cavity) by forming a tight seal (possibly under compression) between the inner and outer surfaces of the cavity.’<br /> <br /> = Related articles on Designing Buildings =<br /> <br /> * Cavity barrier.<br /> * Cladding for buildings.<br /> * Fire collar.<br /> * Fire compartmentation.<br /> * Fire.<br /> * Fire-barrier.<br /> * Fire-stopping in buildings.<br /> * Flats.<br /> * Grenfell tower.<br /> * PAS 9980:2022.<br /> <br /> [[Category:DCN_Definition]] [[Category:Definitions]] [[Category:Building_safety]]</div>

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