ICC 500-2020

This ANSI-approved standard provides minimum design and construction requirements for storm shelters that provide a safe refuge from storms producing high winds, hurricanes, and tornadoes. It contains design requirements for the main wind-resisting structural system and components and cladding of these shelters, and provides basic occupant life safety and health requirements for these shelters including means of egress, lighting, sanitation, ventilation, fire safety, and floor space.