steel fire door hotel design feature：
fire rated up to 3 hours with WHI UL FM label applied .
all of doors are designed and fabricated under SDI requirements.
1 3/4" thickness (44.5mm),non-handed assemble with reversible hinge shim parts.
fire rated wire glass or louver option for vision lites .
all materials is approved in accordance with NFPA ASTM and other standards .
steel stiffener, hardware preparations and reinforcement are conformed with ANSI standards .
Fire-Rated doors are required to be suited for the various type of walls as below :
Frame and Hardware must also carry the appropriate fire label
| Door fire Rating | Wall Rating | Description and Use |
| 3 Hour | 4 Hour | The openings are in wall that separating buildings or dividing a single building into designated fire areas.doors for this openning are required at 3 hours fire rating. |
| 1-1/2 Hour | 2 Hour | Openings are used in enclosures of vertical communication or egress through buildings. theste could be stairwells or elevator shafts. They also are in boiler rooms and in exterior walls that have the potential for severe fire exposure from the outside of the building. |
3/4 Hour (45 Minutes) | 1 Hour | For use on the openings are in corridors and room partitions. A door with this rating may also be used in the exterior wall which are subject to moderate fire exposure from the outside of the building. |
1/3 Hour (20 Minutes) | 1 Hour | These openings are in corridors or interior partitions where this fire rating is required . |
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