Means of egress exits must ___________________.

Means of egress exits are critical components of building safety, designed to ensure a safe and efficient escape route in case of an emergency. The requirement that they discharge directly to the exterior of the building emphasizes the importance of providing a clear and unobstructed path for occupants. This is essential in emergencies, as it allows individuals to exit the building quickly and safely.

Being at grade refers to the requirement that exits should be accessible and not involve stairs or significant changes in elevation that could impede an individual's ability to escape effectively. This is particularly relevant for maintaining accessibility for all individuals, including those with mobility challenges.

The stipulation that exits must not reenter a building is also vital for safety. After leaving the building during an emergency, people should not have to navigate back inside under hazardous conditions. This ensures that once occupants exit, they remain out of danger.

The combination of these three aspects collectively enhances the safety framework of a building, ensuring that means of egress are effective and reliable during emergencies. Therefore, the comprehensive nature of these requirements leads to the conclusion that all three conditions must be satisfied for exits to be deemed compliant.