I just found out that the husband of a friend and former coworker is wheelchair bound now and they are looking for help in making a ramp to the house for him. I will of course be volunteering my time and skills to help I know very little about these ramps.
Common sense would dictate a slight angle along with rails on each side and probably a level landing area at the top. I don't know any details right now except that the final height is about 30 inches. He is a big man; probably in the 250-300 pound range. I'm thinking there may be codes for the design and construction of these type ramps but am not sure. Perhaps someone with experience can point me in the right direction.