What term refers to features that enable disabled persons to make use of the primary functions of a structure?

The term that refers to features enabling disabled persons to utilize the primary functions of a structure is accessibility. This concept encompasses the design and implementation of features that allow individuals with disabilities to access buildings and other types of facilities safely and efficiently. Accessibility ensures that there are appropriate methods of entry, movement within spaces, and the use of all elements of the building, such as restrooms and exits, thereby fulfilling legal requirements like the Americans with Disabilities Act (ADA).

Usability focuses more broadly on how easily and effectively all users can operate components of a system, which may or may not specifically address the needs of disabled persons. Functionality generally speaks to how well a structure or its components serve their intended purpose, without explicitly incorporating access considerations for those with disabilities. Adaptability refers to the capacity for adjustment to changing circumstances or needs, but does not directly address the necessary features for accessibility. Hence, accessibility is the most accurate term that specifically highlights the provisions made for people with disabilities in building design.