For people in wheelchairs, life can be somewhat difficult. However, ramps exist and can permit wheelchair users to more easily access a building. But what about the inside of a building? How to disabled people easily go up and down stairs if there is no elevator in the building? Not everyone is capable of having an elevator home, after all.
Disability is defined by the Americans With Disabilities Act as a physical or mental impairment that substantially limits a major life activity. For a lot of people with disabilities, wheelchair elevators and stair