May 1, 20215 yr comment_19982 Is there a specific tolerance gap between the leaf`s of a FD 30S double door that has a intumescent and some brush seal fitted? any advice much appreciated Report
May 3, 20215 yr comment_19992 Yes 2mm to 4mm check out BS 8214: 2016 https://shop.bsigroup.com/ProductDetail/?pid=000000000030332501 IFSA https://www.ifsa.org.uk/documents. Report
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