What is the minimum height above the floor for door closers and door stops?

The minimum height above the floor for door closers and door stops is set to ensure they are effectively located for functionality and safety. The correct height, which is 78 inches, allows for proper operation without interfering with the door's movement or creating an obstacle for individuals using the space.

This height is also critical for accommodating the range of users, including those who may use the door differently, ensuring that hardware is placed out of reach of small children while still being accessible for adults. Utilizing standard heights like 78 inches helps maintain consistency in building design and usability standards across various commercial establishments, aligning with building codes and safety regulations.

The other options provide heights either too low or excessively high, which could lead to operation issues or increased risk of accidents. Consistent guidelines, such as those specifying 78 inches, are beneficial for achieving uniformity in construction practices.