Fire doors must have reasonable material selection, good structure and reliable fire resistance. Remember not to keep the fire door open for a long time, nor block or lock the fire door.

https://ztfiredoor.com/21909.html

prehung 20 minute fire rated door,45 minute door,fire rated doors menards,fire rated door 36×80,fireproof access panel,prehung 20 minute fire rated door,six panel fire door,fire rated louvre doors,fire rated door 36×80,fire access doors,prehung 20 minute fire rated door,custom made fire doors,45 minute door,emergency exit door price,fire rated door 36×80,fireproof steel door,fire rated attic hatch,45 minute door,fire rated louvre,2 hour rated access panel,