Which statement about runway spacing is correct?

Which statement about runway spacing is correct?

• A. It is not configurable
• B. It is fixed at 100 ft
• C. It varies 100-200 ft
• D. It is 150-300 ft

Answer: (D)

Runway spacing is a design parameter that must accommodate different equipment footprints and maintenance access needs. It isn’t a single fixed number; the spacing is allowed to vary to fit the specific layout and safety requirements of a plant. In practice, a wide, flexible range is used to cover different configurations, typically about 150 to 300 feet. A spacing of 100 feet would be too tight for many large pieces of equipment and for safe access around them, while the 100–200 foot range or a fixed small value wouldn’t fit larger plants or provide adequate clearance. Therefore, the statement that spacing varies from about 150 to 300 feet best reflects how this dimension is actually managed.

Runway spacing is a design parameter that must accommodate different equipment footprints and maintenance access needs. It isn’t a single fixed number; the spacing is allowed to vary to fit the specific layout and safety requirements of a plant. In practice, a wide, flexible range is used to cover different configurations, typically about 150 to 300 feet. A spacing of 100 feet would be too tight for many large pieces of equipment and for safe access around them, while the 100–200 foot range or a fixed small value wouldn’t fit larger plants or provide adequate clearance. Therefore, the statement that spacing varies from about 150 to 300 feet best reflects how this dimension is actually managed.