This is most obvious with the use of step over bulkheads at doors to decks.
Fire door sill detail.
Per section detail 4 maximum jamb depth.
Consult with individual fire door frame manufacturers listings for fire door frames that can be used in drywall stud walls with a maximum 3 hour.
15 15 minimum gage.
Similarly a floor level could be above a threshold level.
Filling and grouting around entrance by others.
Where openings occur all walls must be plumb and sill supports must be level and flush with hoistway walls.
It is the bulkhead threshold level that is important not the internal floor level.
Integral frame sill fire doors models 660 662 integral frame counter fire doors models 660 662 provide a handsome finished appearance for a variety of applications including food service counters available for opening sizes up to 9 5 x 55 2870 mm x 1346 mm these doors carry a 1 1 2 hour ul class b label and are factory assembled as a complete unit with fully welded frames.
Fire door frames frames used in masonry walls may be used with a maximum 3 hour fire door while frames used in drywall stud walls are intended to be used with a maximum 1 1 2 hour fire door.
In figures 17c 17d and figure 73d the details are equally applicable if the floor level beyond the sill reveal stepped up.
Door frames are to be anchored to walls and properly grouted in place to maintain legal fire rating masonry construction.
Protection association for fire doors and fire windows nfpa 80 and the door components installation.
Internal openings in walls should.
The development of fire door testing.
111 c recommended louver details for standard steel doors.
The declaration needs to detail the approved hardware that has been installed with the doorset.
Doors and windows shall be installed to appropriate tolerances including openings in walls and external openings viewed from the inside.
Anchoring at mullions sills.
This publication contains explanations and details of louver designs that are most commonly available within the standard door industry.
The old test of fire doors to bs 476 part 8 for fire resistance was carried out simply in a furnace increasing the temperature to that found in rooms on fire and the door was checked to ascertain when the fire would breach the door usually at the gaps at the head and sides of the door.