What is the maximum allowable deviation for a level floor surface under a revolving door over its entire circular area?

The maximum allowable deviation for a level floor surface under a revolving door being 1/16 inch is based on industry standards that ensure accessibility and safety. A consistent and even flooring surface is essential for ensuring that the door operates smoothly and safely without tripping hazards. The 1/16 inch tolerance helps maintain a level transition for users, especially those with mobility challenges or using assistive devices.

This specific measurement is often referenced in regulations and guidelines related to building design, such as the Americans with Disabilities Act (ADA), which requires that floor surfaces be level to minimize potential difficulties for individuals navigating through public spaces. A deviation greater than this could lead to operational issues with the revolving door, potential safety hazards, and non-compliance with accessibility standards. Thus, the 1/16 inch tolerance is a key aspect of floor design in settings involving revolving doors.