In general, the fire doors installed on buildings do not have special regulations on what materials to use, but the practice we actually use is that the indoor fire doors are generally made of wood, and the outdoor steel fire doors are used.

https://ztfiredoor.com/24660.html

fire door accessories,fire door fittings,өрткө каршы эшик аксессуарлары,fire rated door interior door,fire door panic bar exit device,fire door accessories,fire door controller,fire door fittings,fire door knocker,fire rated door interior door,отко чыдамдуу эшиктердин баасы,fire door accessories,fire rated door entry,fire door fittings,fire door meatl,fire rated door interior door