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Atmas Group Oy

Doors, Gates & Hatches for Shelters and Bunkers

Shelter doors and hatches can offer protection against blast, splinter, bulletproof, forced entry, fire and more.

Atmas provide a wide selection of protective doors, gates and hatches for civil defence shelters, bunkers, safe rooms, industrial protected spaces and storage facilities and more.

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We offer standard and custom designed doors which can comply with different international standards and norms related to civil defence shelters and protected structures like Finnish, Ukrainian, Israeli as well as different European standards for blast and ballistic resistance, gas tightness, forced entry, fire and more. ​​

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See Our Protective Door Catalog

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Atmas Offers a Comprehensive Range of Protective Doors, Gates and Hatches for Protected Spaces

Finnish Certified SO1 & SO2 Type Shelter Doors

Robust metal blast-resistant and gas-tight doors with optional splinter protection. These doors are designed according to Finland shelter norms for civil defence shelters.

Key Features:

  • Comply with requirements of Finnish civil defence norms.

  • The standard doors leaf made of single plate 20 or 30 mm thick, other options available for customized doors. 

  • Standard sizes 900x2000 mm & 1200x2000 mm, optionally can be designed to customers requested dimensions.

  • The door is designed to withstand a 200 kN/m2 (2 bar) blast wave pressure load according to Finnish shelter norms.

  • The hinges and bolt mechanism are able to withstand recoil forces.

  • The door is equipped with shock supports that make the door resistant to shock loads up to 30 g.

  • The door is gas-tight when closed, to prevent harmful gases from entering the civil defence shelter and the shelter can be overpressurised.

  • Optional protection from splinters with SO-1S model which have a door panel at least 30 mm thick instead of 20 mm in standard model SO-1.

  • The standard door frame is manufactured to be casted in 300 mm thick concrete walls but can be customized for thicker walls.

Ukrainian Certified DU (ДУ) Type Shelter Doors

Heavy-duty blast rated & gastight doors that designed both for new construction and retrofitting in existing structures. The doors designed according to modern Ukrainian construction norms for civil defence shelters and can be also customized for providing additional ballistic protection. 

Key Features:

  • The doors are heavy duty with internal structure for high pressure loads

  • Standard door opening sizes 900x2000 mm, 1200x2000 mm, 800x1800 mm and customized sizes available.

  • Special frame shape allows retrofitting the door in existing structural openings or on pre installed frames

  • The patented design of the door allow good serviceability after installation

DU Doors Models:

  1. DU-IV (ДУ-IV) gastight doors

  2. DU-IVR (ДУ-IV) blast and gastight door (100 kPa) 

  3. DU-250 (ДУ-250) blast and gastight door (250 kPa)

  4. DU-III (ДУ-III) blast and gastight door (440 kPa)

  5. DU-I  (ДУ-I) blast and gastight door (900 kPa)

  6. customized solutions based on DU type doors 

Israeli Certified M-Type Doors for Shelters & Protected Spaces

Israeli shelter standard 4422 defines the specifications and qualities of shelter doors for residential shelters, civil defence shelters, bunkers and more. The doors vary from light doors for home shelters up to heavy duty doors for government and highly protected bunkers with require high blast loads protection, gas tightness, ballistic and splinter protection, forced entry and fire ratings. Israeli shelter doors are live tested and approved by The Home Front Command.

Key Features:

  • Tested and certified doors according to national standard SI 4422

  • Large variety of doors from light blast doors for residential shelters and safe rooms to heavy duty blast rated doors for bunkers.

  • In most door types the frame designed for installation of additional fire / security door along with blast and gastight door.

Israeli Shelter Door Types:

  1. MD - light blast and gastight door for residential shelter / safe rooms

  2. MDR - blast and gastight door for residential shelter / safe rooms with 15 mm steel plate for splinter protection

  3. MMH - blast and gastight door for civil defence shelters and protected spaces

  4. MMR - heavy duty blast, gastight and splinter protected door with leaf made of 25mm or 32 mm thick steel plate.

Customized Shelter Doors

Tailor-made doors designed to meet specific security and operational requirements for shelters, government buildings, and industrial facilities. These doors are built with flexibility in mind, offering various customization options to ensure they meet the unique demands of each project.

Key Features:

  • Custom sizes and specifications based on project requirements.

  • Manual or electric operation to suit different environments.

  • Advanced locking mechanisms for superior security.

  • Special door designs for emergency facilities and safe rooms.

Applications:

Ideal for custom shelters, government buildings, embassies, data centers, and other high-security locations requiring bespoke protective solutions.

Send Us an Enquiry

Blast & Gas Tight Hatches for Emergency Evacuation

Protective hatches designed to provide secure emergency evacuation routes. These hatches offer both blast resistance and gas-tight sealing, making them critical components in safety plans for secure facilities. Their durable design ensures reliability even under extreme conditions.

Key Features:

  • Reinforced frames and locking systems for maximum security.

  • Easy-to-operate mechanisms for quick access during emergencies.

  • Gas-tight seals to prevent contamination from external threats.

  • Built to withstand high overpressure and extreme environmental conditions.

Applications:

Widely used in shelters, underground bunkers, military installations, and industrial plants where quick, secure evacuation routes are essential.

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