My thoughts would be to ask for the manufacturers information for the doors. That should give you some technical info on the doors and what their rating for fire should be. Sometimes you can find this information on a label of the door itself. A good way to check is find the fire rating for the door and compare it to the Fire Management Plan for the refurbishment works. This plan should show which doors should reach which fire rating. This plan will also tell you distance paths to safe areas such as stairwells etc. Hope that helps..

Some good information on Fire Doors can be found here: http://www.boston.gov.uk...ask=doc_view&gid=655

Since we're adding links as a response, here's another. http://www.bwf.org.uk/no...publications/fire-doors/