Metal fire door thickness

[Prometheus]

It is generally eccepted a 30 minute timber door should be 44mm and 60 minute timber should be 54mm in thickness, what about a metal door leaf?

I have searched the forum as I'm sure this has been asked before but could not find the answer.

Thanks

[Neil ashdown]

Metal fire doors do not have the same inherent properties of insultation and char behaviour as timber fire doors, therefore thickness alone is not necessarily a guide to fire performance. Contact the DHF https://www.dhfonline.org.uk/  for a copy of the guidance documents 'Metal Fire Door-set Verification'  and  ' Metal fire doors Code of Practice'

[Prometheus]

Thanks, already have those documents, just wanted short straight answer ?

[Neil ashdown]

Ha Ha......This is fire doors we are talking about.  Thanks.