Fire Doors & Frames

[richardinnorwich]

Hi all,

Hoping for some thoughts and advice on the above, fitting fd30s flat entrance doors. We're trying to make sure we've got the maximum amount of flexibility when it comes to fitting the doors and notice that some doors we're looking at are stating max trim on edges of 3mm where others are giving 10 mm as the max. I'm assuming that it's dependent on the thickness of the manufacturers hardwood lipping? This leads me to my next question, I've seen an fd30 door that's advertised as with or without lipping!! guessing that the without lipping option leaves you to add it yourself but don't see how that can have a certificate. Is it possible to fit a door without lipping?

When it comes to the frames and their fitting I'm only finding snippits of info, I've put together a mini spec from what I've found but wonder if anyone can suggest a definitive one that will keep the fire door inspector happy.

Fixings: must be within 100mm of top and bottom and for the rest of the frame no further apart than (getting 2 different measurements for this) 500? or 600mm?, any frame packers should be hardwood and recessed 10mm from the frame edge, space between frame and wall should be no more than 10mm and should be packed with mineral wool and finished with intumescent sealant. I can't find any spec for the finishing of the fixing heads i.e. whether a 2 part filler is acceptable or whether a timber plug needs to be used.

As always thanks in advance for any help or links to info that you can share.

[Mike North]

When you have chosen the door, ask for the global assessment this will detail  what you need to do, the allowable gaps, the hardware allowed, the positioning of the hardware the lipping type and thickness.  See the attached

  https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwjRy7G0-L2LAxUwYEEAHTfYKJoQFnoECA4QAQ&url=https%3A%2F%2Fwww.falconpp.co.uk%2Fmedia%2F1160%2Fflamebreakfd60revi.pdf&usg=AOvVaw2YqZZI3AX_Bs9lfJ_LMI8k&opi=89978449

[Neil Ashdown MAFDI]

There are several types of designs for timber based fire doors, most will have lipping requirements but there are some without lipping.  Where lipping is a requirement, density and thickness will be specified by the data sheet for the door leaf. As for trim allowances, fire door leaves can have different core construction types some having stiles and rails and some without. Some having a tubeboard core and some being completely solid. That's why there are variations in permitted trim allowances. 

Select the fire door leaf most appropriate to its end use. 

There is no 'one size fits all' when it comes to installation. The data sheet for that particular fire door leaf will provide the necessary details but you will also find BS 8214: 2016 invaluable for guidance. A new version of that Standard is due out this year I believe.