Metal may not seem like an ordinary material to use for underground shelters but in some cases it is cheaper then cement. Many of the metal shelters are just as effective as any of the other materials used in construction.

Container Underground-This guys sells shipping containers with instructions on how to bury it to be safe from storms.

Culvert Shelters-Easy to build. Could help you withstand a nuclear war. From the Parowan Prophet website.

Granddaddy of all Underground storage areas-This place is made from a culvert.  Very nice.

Home, Home under the range-First the culvert appeared and then it was gone..

Storm and Tornado-These steel in house or buried units will protect you from natures fury. Texas company

Storm Shelter-From Getapatent.com. This investment opportunity is open for this corrugated steel shelter.

Storm Shelters of America-These are metal shelters buried in the ground. Handicapped versions available. Texas