From NCMA eNews
May 30, 2019
Yes. Concrete masonry is an ideal material when building shelters for protection against natural disasters such as storms/hurricanes and tornadoes. A concrete masonry shelter can be built for small scale residential purposes or can be built as a community shelter to occupy more people. For more information about concrete masonry and shelters see TEK 5-14Concrete Masonry Hurricane and Tornado Shelters.