What is the minimum height required for the exit terminal of a mechanical draft system above a public walkway?

The minimum height required for the exit terminal of a mechanical draft system above a public walkway is determined to ensure safety and compliance with various regulations. A height of 7 feet above the walkway is necessary to prevent any potential obstruction or hazard to individuals passing underneath. This height allows ample clearance for pedestrians, including those who may be taller or using mobility aids.

Maintaining this minimum height also helps reduce the risk of exhaust gases and other emissions affecting air quality at ground level in public spaces. It ensures that the ventilation systems function effectively while minimizing any negative impact on the surrounding environment and public health. Other height requirements might be relevant in different situations, but for public walkways, 7 feet is established as the standard to balance safety and functionality.