30´ - Fire Doors
Options of door edges
Flat edged door :
- most suitable for fire doors
Rebated door :
- bigger door thickness should be chosen
- rebate depth should be as big as possible
Thickness of door leaf / Rebate depth
| Door thickness: | as thick as possible |
| Rebate depth: | as deep as possible |
| Rebate: | standard rebate (12.5 mm) |
Positioning of intumescent materials
Intumescent can be placed in the door leaf or in the frame.
In both cases it should be positioned quite near to the outer edges.
Gap between core and internal frame
Different gaps between core and internal frame :
| - stile: | gap of about 2 mm each side |
| - rail: | gap as small as possible |
Humidity and structure of components
- all timber components : as dry as possible
i.e. : max 9%; if possible 7 to 8% - annual rings : standing cht eng small annual rings (weight controll)
- higher specific weight :
- slower burn-off ( mm/min )
- bigger distortion possible