Legal length of overhang on flatbed trailer?

Every state is different, and has its own set of laws for oversized load movement. Each state will have to considered independently when seeking permits. For example; In AZ., you can leally have up to 6' of rear overhang, in CA. you can have up to 2/3 the wheel base (measurement from last axle on truck to last axle on trailer). In addition, there are also varying; hours of operation, axle spacing requirements, and flagging, sign, and lighting requirements for the overhang.