How Fire-Rated Doors are Made & Tested | Steel Door Institute

See how commercial fire-rated doors are made and tested. Fire-rated doors and frames play a vital role in keeping people safe and minimizing property damage during a fire. Hollow metal is the only door material widely available with a 3 hour label.
For more on fire-rated doors, view here:
steeldoor.org/...
SDI member manufacturers have been certified to provide quality fire-rated doors and frames. View their products at:
www.steeldoor.o...

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All this fire rated door core normally choose fire resistance pu glue , glue the core and steel sheet

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