Low Impact Resistant support is defined as what height range?

Low Impact Resistant support is defined as what height range?

• A. 40 ft and above
• B. Less than 6 ft
• C. 6-40 ft
• D. 0-3 ft

Answer: (C)

Low Impact Resistant supports are defined by a height range of 6 to 40 feet. This range provides enough height to mount standard airfield lighting equipment while keeping the structure short enough to limit damage and debris if struck by an aircraft. Structures shorter than 6 feet generally can’t reliably support typical fixtures and aren’t classified as LIR, while those at or above 40 feet exceed the low-impact category and carry greater risk and different design requirements. So the correct range is 6-40 feet.

Low Impact Resistant supports are defined by a height range of 6 to 40 feet. This range provides enough height to mount standard airfield lighting equipment while keeping the structure short enough to limit damage and debris if struck by an aircraft. Structures shorter than 6 feet generally can’t reliably support typical fixtures and aren’t classified as LIR, while those at or above 40 feet exceed the low-impact category and carry greater risk and different design requirements. So the correct range is 6-40 feet.