The required number of shelter-in-place drills varies by jurisdiction and type of facility, but common standards include:
- For schools, at least one shelter-in-place drill per year is generally required, often in addition to multiple fire evacuation drills annually
. Some school districts, such as Los Angeles Unified, require at least one shelter-in-place drill per semester for in-person classes
- Some states, like Tennessee, mandate at least three safety drills that do not require full evacuation (which includes shelter-in-place drills) each school year
- Child care programs may be required to hold two shelter-in-place drills annually, with procedures and supplies reviewed during these drills
- The International Fire Code (IFC) requires emergency drills, including shelter-in-place, at intervals specified in their tables, often at least annually, but more frequently as needed to familiarize occupants
- In workplaces, the IFC suggests fire drills at least quarterly, but shelter-in-place drill frequency depends on risk factors and regulatory requirements; no universal mandate exists, but regular drills are recommended to maintain preparedness
In summary, shelter-in-place drills are typically required at least once or twice annually in schools and child care settings, with some states requiring three or more drills per year. Workplaces follow local codes and risk assessments to determine frequency. Checking specific local or state regulations is necessary for exact requirements.
