How far can the top of the exterior landing be below a threshold if the door swings away from the landing?

The correct answer indicates that the top of the exterior landing can be 7.75 inches below the threshold when the door swings away from the landing. This specification is crucial in building and construction codes, as it ensures safe and accessible egress from the structure. The specified height helps prevent water accumulation near the door threshold, which could potentially lead to water intrusion into the building or create a slip hazard for individuals exiting the door.

Moreover, maintaining the appropriate distance between the landing and the threshold is important for compliance with accessibility standards, ensuring that the design accommodates all users, including those with mobility impairments. By adhering to the 7.75-inch maximum drop, builders can ensure that their construction meets safety regulations and fosters an efficient flow of traffic both in and out of the building.

Understanding this requirement is essential for contractors to avoid costly modifications and ensure that their projects pass inspections.