Understanding Missile Level E Requirements in Florida
When it comes to hurricane protection, not all impact ratings are created equal. Missile Level E, defined under ASTM E1996, represents the highest standard for windows, doors, and protective systems facing windborne debris.
Unlike Level D, Level E is designed to withstand a 9-lb 2×4 fired at 80 ft/s, simulating extreme storm conditions. After impact, systems must also endure cyclic wind pressures, ensuring they remain fully functional throughout a hurricane.
Where Missile Level E Applies
Florida’s Building Code integrates these requirements directly into its regulations. In High-Velocity Hurricane Zones (HVHZ), including Miami-Dade and Broward counties, compliance is mandated under Chapter 16 (Structural Design) and Chapter 24 (Glass & Glazing) of the Florida Building Code, referencing TAS 201-94 for impact testing.
For areas outside HVHZ, Sections 1709.5.1 and 2411.3.2.4.i of the FBC specify that essential facilities must meet Level E standards, following ASTM E1996 §6.2.1.1 on Enhanced Protection.
ASTM 1996 6.2.1.1: Enhanced Protection (Essential Facilities)Buildings and other structures designated as essential facilities, including, but not limited to, hospitals; other health care facilities having emergency treatment facilities; jails and detention facilities; fire, rescue and police stations, and emergency vehicle garages; designated emergency shelters; communications centers and other facilities required for emergency response; power generating stations; other public utility facilities required in an emergency; and buildings and other structures having critical national defense functions.
Why Level E Matters
Level E is not required for every building. Standard commercial structures often only need Level D protection. But for essential facilities, Level E ensures maximum safety and structural resilience, protecting occupants and critical operations when hurricanes strike.
By understanding and implementing these standards, architects, engineers, and builders can design facilities that withstand the worst storms, while remaining compliant with Florida’s strict building codes.
For guidance with your next project, explore our Plans, Calculators, Knowledge Base,
or contact us directly for site-specific support
Last Update: November 17, 2025