Global assessment of fire doors.

[kurnal]

Fishy is the London Underground specification published and available for download anywhere?

[Tom Sutton]

Thanks Kurnal I wasn't sure if there was a typo and it should have been UL (Underwriters Laboratory) the London Underground specification is a new one on me.

[Fishy]

Yep fishy you are wrong. For a start, notional fire resistance is not a new term.  It was used donkeys tears ago in relation to the FR of lath and plaster ceilings.

I stand corrected - I'd love to know in which standard or guidance document?  I can't find it in BS 4422 or ISO 13943.  I know there were publications (like Read & Morris, if I recall correctly) that used to 'assign' fire resistance performances to traditional forms of construction, but I didn't know that particular term was used?

London Underground (LU) standard is Bb001 & is available via various technical standard portals, if you have the correct package.  I wouldn't wish to reproduce the relevant text, as it's their copyright.