2021 . Federal Emergency Management Agency
This fifth edition of FEMA P-320 presents updated and refined criteria for residential safe rooms through reference to the newly updated fourth edition of FEMA P-361 (FEMA, 2021a), Safe Rooms for Tornadoes and Hurricanes: Guidance for Community and Residential Safe Rooms. FEMA P-320 draws on these updated criteria to address how to design and construct a safe room for a one- or two-family dwelling that provides near-absolute protection from wind and wind-borne debris for occupants. It should be noted that the updates in this edition of FEMA P-320 focus guidance exclusively on residential safe rooms for one- and two-family dwellings. Prescriptive safe room designs that meet FEMA criteria for one- and two-family dwellings are also included as a part of this publication. The 2021 editions of this publication and FEMA P-361 supersede the FEMA National Performance Criteria for Tornado Shelters (1999) as well as any earlier versions of FEMA P-320.
Federal Emergency Management Agency
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