There are three major differences between internal and external fire doors.
First, the external fire door is certified for external use. This means that it is tested against weathering, and has a higher moisture resistance rating than the internal doors.
Second, all fire doors have an intumescent strip fitted along their length. The strip expands in the event of a fire to protect against the movement of heat and smoke around the door set. The internal doors have a lower resistance rating, which means they are less effective at containing smoke and heat within an area of origin.
Third, external fire doors must comply with regulations requiring them to be non-combustible, whereas internal fire doors can be made from combustible materials so long as they are not rated above 30 minutes (FD30s).
In America, the fire doors you use must be compliant with the Building Code of America. To be compliant, your external fire doors must have the following:
-A label indicating compliance with America Standard AS1905.1
–A certification number and date
–Each door leaf must have a certification label
Located in a port city, China Dalian Golden House Door & Window Manufacture Co., Ltd. is a large-scale enterprise specialized in producing American-Standard steel fire doors and wooden fire doors. Our company produces 50000 sets of steel fire doors and 20000 sets of wooden fire doors every year. Our fire door products have passed UL Approvals AND FM Approvals and INTERTEK(WH) approval successively. Moreover, our fire door products can be sold directly to more than 20 countries over North America, Latin America, Middle East and Africa.
We respond to tendency of international fire doors market, and provide good service combining foreign clients' needs, with an aim of expanding a wider international market. In the future campaign for world market, our foreign trade elites will achieve better sale performance through unremitting efforts and dedication.
please get into the contact with servicer if need to learn more on the product price and size forcustomized service . also please contact us on alibaba
