Aluminium trapdoors

Revision aluminum trapdoors with gypsum cardboard. They are made of two stop angles frames, appropriately adjusted with a loose. They are filled with gypsum – cardboard Hydro H2 (GKBI) 12,5 mm or 25 mm. They are closed with two detents, which open a trapdoor after its push. To prevent from willful opening, you have to hang a door wings by means of the carabiner. The trapdoors are amounted in the walls and ceilings for better access to the valves, switches and other devices.