Architecture Supplies
Fire-Rated Doors
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- Fire-rated door assemblies from 20 minutes to 3 hours, tested and labelled as a complete assembly of leaf, frame, hardware and glazing. The label applies to the assembly exactly as tested, substituting any one component invalidates the rating for all of them, which is why the ironmongery schedule and the door schedule have to be read together.
Application
Required at every opening in a fire-rated barrier: stair enclosures, corridor cross-walls, plant rooms, electrical rooms and shaft access. The commonest cause of failure at inspection is not the door but what was added to it, a kick-down hold-open, a drilled-through sign fixing or a site-cut vision panel each void the certification, and each is usually added after handover by someone who never saw the label.
Standards & Reference 7 cited
NFPA 80
Not a test but a compliance standard: how fire doors are installed, inspected and maintained, including the annual inspection and the requirement that every fire door self-closes and positively latches.
UL 10C
The positive pressure fire test for door assemblies. Positive pressure drives hot gas through any gap between door and frame, which makes it the more demanding test and the one North American codes now call for.
EN 1634-1
The European fire resistance test for door and shutter assemblies, and the basis for CE marking a fire door. Built on a different pressure regime from UL 10C, so the two ratings are not interchangeable.
BS 476-22
The older British fire resistance test for non-loadbearing elements, tested at roughly neutral furnace pressure. Still cited on UK-legacy specifications alongside EN 1634-1.
Also citedNFPA 252UL 10BANSI/UL 1784
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