[ noun ] concrete with metal and/or mesh added to provide extra support against stresses
Used in print(The Family Fallout Shelter. Office of Civil and Defence...)
The roof shown here ( fig. 9 ) is a 6 - inch slab of reinforced_concrete , covered with at_least 20 inches of pit-run gravel .
An underground reinforced_concrete shelter can be built by a contractor for about $ 1000 to $ 1500 , depending_on the type of entrance .