SCIF windows must be secured at ground level and up to __________ feet above ground level.

• A. 12 Feet
• B. 18 Feet
• C. 24 Feet
• D. 30 Feet

Answer: (B)

SCIF exterior security targets the zone where intruders can realistically access a window. Securing windows from ground level up to 18 feet above ground ensures that any glazing within easy reach—such as someone using a ladder or climbing—cannot be forced or exploited as an entry point. The 18-foot mark represents the practical limit of this direct-access risk, balancing protection with practicality. Beyond that height, typical intrusion attempts become far less feasible, so the standard focuses on the lower portion of the facade. The other heights either widen unnecessary risk exposure or add needless cost: 12 feet leaves more of the window area vulnerable, while 24 or 30 feet extend security beyond what's required for standard intrusion threats.