Storm Shelter Spec Reference

FEMA P-320 published guidance for residential storm shelters (by name only).

Run the calculator

Formula and source

(reference page; no compute) FEMA P-320 (Taking Shelter from the Storm) and ICC 500 (Standard for the Design and Construction of Storm Shelters) wind-design, anchorage, door, and ventilation considerations.

FEMA P-320 (5th edition, 2021) by name; ICC 500-2020 by name.

Audience

This tile is built for carpentry and the adjacent professions in the Knowledge References group. The interactive calculator runs entirely in your browser. No account, no fee, no advertising, no tracking.

Related tools

Posture

Rough Logic answers the math question the working professional asks on the job. The site is a calm, fast, ad-free, account-free, ever-free reference. It does not interpret code. It does not replace the licensed professional. It does not store your inputs. The Authority Having Jurisdiction governs all installations and inspections.