Suoja-Expert – halfway planned

Suoja-Expert offers consulting and support for construction designers in, for example, placement and layout planning and 2D and 3D design.  We help in creating a proper and accurate construction design in one go to avoid problems during the construction and inspection stages. 

Rules and regulations for designers

The property owner must make sure that a new building includes a civil defence shelter or has one nearby. The shelter must be big enough for all the people living, working permanently or staying in the house. However, the obligation to build a shelter does not apply to temporary buildings that are going to be in use for no longer than five years.
A shelter must be built for a building or a group of buildings on a joint plot of land or site if they encompass a minimum floor area of 1 200 square metres and have people permanently living, working or otherwise dwelling in them. As an exception, a shelter must be built for an industrial or factory building, warehouse or a place of assembly if the floor area of the building or block of buildings is at least 1500 square metres. There is no obligation for building a shelter if the plot, the site or a public civil defence shelter have a sufficient number of shelter places in accordance with law and regulations. Existing buildings on the same site or plot of land that already have a shelter will not be taken into account when imposing an obligation to build a shelter for a new building, nor will buildings that had a final inspection carried out more than five years before the building permit application was lodged. 
After hearing the regional rescue authority, the authority granting the building permit may allow the building of a joint civil defence shelter for two or more buildings if the shelter is built within five years of a partial final inspection of the first building.

Placement drawings / Design modelling

According to the Finnish Government regulations, the walls and ceiling of a S1 protection class shelter have to be made of reinforced concrete at least 300 mm thick. Load-bearing partition walls and pillars have to be made of reinforced concrete and floors (also intermediate floors in case of a two-storey shelter) have to be reinforced concrete at least 150 mm thick. The walls and ceiling of a S2 protection class shelter have to be reinforced concrete at least 400 mm thick, and floors that are not located on top of rock mass have to be made of reinforced concrete at least 200 mm thick. The walls functioning as targets for blast pressure in the tunnels of a bedrock shelter should reinforced concrete with a thickness of at least 800 mm. Walls, pillars and intermediate floors inside S2 protection class shelters and bedrock shelters should be of reinforced concrete at least 200 mm thick.
A bedrock shelter’s placement, shape, rock overburden (walls and ceiling) and reinforced structures have to be designed according to rock mechanics. Flood risk needs to be considered when designing and constructing a bedrock shelter.


  • Consulting

  • Placement and layout design

  • 2D and 3D design

  • Regulations

  • Placement drawings / Design modelling

  • Planning instructions

Suoja-Expert Oy   |   Hannuksenpelto 3   |   02270 ESPOO, FINLAND   |   Business ID 0567092-7   |   Tel.0207 600 700
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