An angled door allows for debris to blow up and over the door, or sand to slide off, without blocking it, and the angle also reduces the force necessary to open the door if rubble has piled up on top. This is also the reason the main door on most storm cellars is mounted at an angle rather than perpendicular with the ground. They are most frequently seen in the Midwest (" Tornado Alley") and Southeastern United States (" Dixie Alley") where tornadoes are generally frequent and the low water table permits underground structures.Īn average storm cellar for a single family is built close enough to the home to allow instant access in an emergency, but not so close that the house could tumble on the door during a storm, trapping the occupants inside. A storm shelter or storm cellar is a type of underground bunker designed to protect the occupants from violent severe weather, particularly tornadoes.
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