A wheelchair ramp is defined as: An inclined plane installed in addition to or instead of stairs. Ramps permit wheelchair users, as well as people pushing strollers, carts, or other wheeled objects, to more easily access a building. Wheelchair ramps (or other ways for wheelchair users to access a building, such as a wheelchair lift) are required in new construction for public accommodations in the United States by the Americans with Disabilities Act. A wheelchair ramp can be permanent, semi-permanent or portable. Permanent ramps are designed to be bolted or otherwise attached in place. Semi-permanent ramps rest on top of the ground or concrete pad and are commonly used for the short term. The wheelchair ramp gives a wheelchair user more accessibility where a vertical distance must be traversed.
In America for loading unoccupied wheelchairs the ADA recommends a 3:12 slope. This means for every three inches of vertical rise you are required to have a least one foot of ramp. For business use the ADA recommends a 1:12 slope which means that every one inch of vertical rise requires one for the ramp. For example 24 inches of rise demands a 24-foot-ramp minimum. The U.K. has its own set of guidelines which are more complicated because they integrate both the metric and English terms of measurement.
Your state or provincial government is a good place to start if you're looking for more information on how to make your business more accessible. Often your local government is able to provide tips on which features are the most effective and on how to install them.
Product appraisals and trials involving wheelchair users have highlighted the fact that no single ramp design met all the needs of the users, though wheelchair ramps were available in a diverse range of designs and configurations.
Some common problems associated with permanent ramps include inclines which are too steep or uneven, improperly supported slopes and landings, lack of railings and side barriers or ramps which attain some height. Problems associated portable ramps include too short a length making the ramp too steep, unevenly placed ramps which can cause instability, improperly anchoring which can cause the portable ramp to slip off it's upper surface whether it's a van floor, porch or any other elevated platform.
Construction or placement of a ramp should take into account a manual wheelchair user's upper body strength to push up a steeper incline, the stress on the motor of a scooter or power wheelchair of such an incline, and the tipping potential posed by descending a steeper ramp.
There must be a level landing at the top of the ramp and where the ramp meets the ground. The landing can be an existing surface such as a porch or sidewalk or it can be constructed as part of the ramp. Landings should be at least the same width as the ramp and 60 inches long in order to accommodate the entire wheelchair. If the landing is in front of a doorway, it should also provide enough space for you to open the door.