Long term use of steel fire doors will not cause quality problems due to frequent opening and closing.

https://ztfiredoor.com/12699.html

fire proof access panel,fire proof exterior doors,2 saat nominal qapı,attic door fire rated,interior fire rated garage door,fire proof access panel,oversized fire doors,fire proof exterior doors,sliding fire doors domestic,attic door fire rated,steel fire rated entry doors,fire proof access panel,4 fire doors,composite doors fire rated,attic door fire rated,fire rated internal crittall doors,ul rated doors,fire proof exterior doors