Semi-Frangible Support is defined as what height?

Semi-Frangible Support is defined as what height?

• A. 40 ft and above
• B. 6-40 ft
• C. Less than 6 ft
• D. All of the above

Answer: (A)

The idea being tested is how height determines whether a support is considered semi-frangible. In airfield design, supports are categorized by how easily they yield or break away if struck. Semi-frangible refers to structures tall enough to require a yielding design, specifically those 40 feet tall or taller. That height threshold is what places a support in the semi-frangible category, since taller structures pose more risk if rigid and are therefore designed to yield in a controlled way. Heights below 40 feet are classified differently, so they don’t meet the semi-frangible definition.

The idea being tested is how height determines whether a support is considered semi-frangible. In airfield design, supports are categorized by how easily they yield or break away if struck. Semi-frangible refers to structures tall enough to require a yielding design, specifically those 40 feet tall or taller. That height threshold is what places a support in the semi-frangible category, since taller structures pose more risk if rigid and are therefore designed to yield in a controlled way. Heights below 40 feet are classified differently, so they don’t meet the semi-frangible definition.