This document can also be found on the official website of the Federal Emergency Management Agency (FEMA) at https://www.fema.gov
This very technical booklet is based on extensive research of the causes and effect of windstorm damage to buildings. It contains the standards for plan types drawing, technical details, features of materials and descriptions to design and build a safe room for less than 16 occupants, that should provide a high degree of occupant protection during extreme windstorms (tornados and hurricanes).
This resource is part of a Collection of similar guidelines entitled "Storm Evacuation Shelter", and it is included in the series of Collections supporting response to natural disaster resilient shelter. Collections are monitored daily and new content is added.