The hardest aspects of elevators, handicapped lifts, and stair chairs are the legal aspects of the products. Meeting the federal, state, and local codes takes experience and intelligence to apply the code requirements to the site conditions of each job. Each job is different and everyone wants to skip some of the legalities. It is important to understand that even architects cannot be continually up-to-date on the codes. They therefore must rely on companies, like McKinley Elevator, to assist them and to catch mistakes that are inherent on almost every job specified. Here are some links that provide as much code information as is available on line for your use. Some national codes, like ASME regulations, are not available except for purchase.
California Elevator Codes
California Licensing Requirements for Companies and Technicians
US Access Board