malmofire14 Posted February 5, 2014 Report Share Posted February 5, 2014 What is the reasoning behind 60 minute fire resistant walls only requiring 30 minute doors in some blocks of flats. Quote Link to comment Share on other sites More sharing options...
Tom Sutton Posted February 6, 2014 Report Share Posted February 6, 2014 I believe this has been around for some time and I can go back to the 1972 regs but I have never been able to find the answer however I will have another go and if I find out anything I will be back. Quote Link to comment Share on other sites More sharing options...
Tom Sutton Posted February 11, 2014 Report Share Posted February 11, 2014 The wall between a flat and the common areas is a compartment walls and tested to BS 476 part 21 which includes stability as well as integrity, so it needs to remain stable as well as resist the passage of fire for the appointed time (60 mins). Fire doors are non-load bearing and tested to BS 476 part 22 for integrity, I have chosen to ignore insulation because it is not relevant in this discussion. Therefore compartment walls have remain stable and resist the passage of fire for the full 60 minutes and fire doors only have to resist the passage of fire. Because fire doors do not have to remain stable you can have two doors protecting the opening, one from the habitable rooms to the hall and then a second (front door) from the hall to the common areas a combination of 60 minutes. Quote Link to comment Share on other sites More sharing options...
Safelincs Posted February 11, 2014 Report Share Posted February 11, 2014 Hi Tom That is a quality answer! Harry Quote Link to comment Share on other sites More sharing options...
Tom Sutton Posted February 12, 2014 Report Share Posted February 12, 2014 Thanks Harry but I have been told off by Colin Todd who says,"Tam, you are making it all too complicated and your explanation does not take into account flats with no internal fire doors". I am now awaiting his simplified answer. Quote Link to comment Share on other sites More sharing options...
Safelincs Posted February 12, 2014 Report Share Posted February 12, 2014 It will be interesting to hear Colin's view Quote Link to comment Share on other sites More sharing options...
Tom Sutton Posted February 14, 2014 Report Share Posted February 14, 2014 Check out http://fire.org.uk/forum/index.php?topic=6252.0 and follow the thread wee b is an building control expert see what he has to say. Quote Link to comment Share on other sites More sharing options...
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