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Rules for Installation of Concrete Shelters
- Concrete shelters should be as deep underground as possible, to protect against the effects of radiation and blast.
- The shelter should have as much of its external surface against the ground as possible; to protect against radiation, fragments, projectiles, conduction of heat generated by the occupants, and protection of heat caused by external fires.
- The shelter should be located under the massive parts of the building to protect against radiation, conventional bombs and fire.
- The shelter should be located as far as possible from potential fuel concentrations and flammable materials.
- The shelter should be placed so that emergency exits and air inlets can be extended from the building into zones free from debris to better the possibility of unaided exit and intake of fresh air.
- The living area should not be in 'line of sight' of the door.
- Doors to the shelter room should be off-set from doors to the air lock.
- If there is no airlock, entrance doors to the shelter room should be turned 90 degrees from the entrance hall.
- Doors must be constructed with no less than 8-inch thick concrete, with gas-tight gaskets.