Doors, hatches & wall sleeves

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Doors & Hatches

Used in: In all shelters from lighter K protection class shelters to heavier S6 protection class bedrock shelters, where they are installed in the walls of the shelters.
Purpose of Use: Choosing a door and a hatch that are type approved and designed for the particular purpose makes it possible to sustain overpressure in the shelter and secure its gas-tightness. Additionally, the door and the hatch protect the shelter from both outside pressure and blasts as well as shrapnel effects.
Specification: Shelter doors and hatches are controlled by the VTT Technical Research Centre of Finland and they meet the requirements of the Finnish Ministry of the Interior.