Final answer:
According to the ADA, the landing at the base of a ramp must be at least as wide as the ramp and have a minimum length of 60 inches (1525 mm) for safe maneuvering.
Step-by-step explanation:
The size of the landing at the bottom of every ramp used by people with physical disabilities is a matter of both safety and accessibility. The Americans with Disabilities Act (ADA) has set forth guidelines that specify minimum dimensions for these landings to ensure that people with disabilities, including those in wheelchairs, can safely and comfortably use the ramps.
According to ADA guidelines, the landing must be at least as wide as the ramp itself and have a minimum length of 60 inches (1525 mm) clear space so that there is room for maneuvering. Additionally, if the landing is part of a larger circulation path, it must maintain the minimum required width of the path, typically 36 inches (915 mm). This is to ensure that other pedestrians can pass by safely without causing an obstruction on the approach to the ramp.