This publication offers important information about the design and construction of community safe rooms for twelve to several hundred people. Note that this document is for local governments and other groups intending to build community safe rooms, not individual homeowners.

Safe Rooms for Tornadoes and Hurricanes: Guide for Community and Residential Safe Rooms is available at https://www.fema.gov/media-library-data/1467990808182-0272256cba8a35a4e8c35eeff53dd547/fema_p361_July2016_508.pdf