Shelters can be designed according to national civil defense standards or/and local construction norms, there are only several countries that have functioning national standards among them Finland, Switzerland, Israel, Singapore, Ukraine and several more. 
In countries where national civil defense standard is not defined or functioning, there may be construction norms applicable or specific requirements must be met. In case of the private property, the customer usually can define own requirements and choose from various available options for construction, modernization and protection improvements based on their own specification including protection level, shelter size, number of people, location, environmental conditions, response time and other factors.  It is important to take into consideration specific threats and regional conditions for example if the location of the planned shelter near strategic facilities (military bases, government facilities, critical infrastructure, command and control centers, storages or others important facilities) that are usually targeted directly in case of a conflict, as well location near chemical plants, hazardous facilities, nuclear power plants (NPPs), forests with risk of fires, rivers with risks of floods and more. Atmas professional team after careful evaluation of the customers’ requirements, threats and conditions will be glad to provide the most suitable, comprehensive and cost-effective solution.