FEMA P-320 Taking Shelter from the Storm: Building or Installing a Safe Room for Your Home
FEMA Building Science
Residential tornado/hurricane safe-room design guidance with buildable plans — serves the 'shelter' dimension for homeowners rather than wilderness shelter.
Editor's notes
References FEMA P-361 and ICC 500 (the ICC standard itself is copyrighted — do not bundle ICC 500, only the FEMA docs).
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PDF, 86 pages; companion construction drawings on FEMA's safe-room resources page
~10-30 MB
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Source & license
US federal government work (public domain).
Use of this material does not imply endorsement by its publisher or any government agency.