What is the MAXIMUM amount of lift is legal without engineering?

I am looking at making some lifts that are geared towards your market.

If possible, is it the same all over or does each region have its own laws?

Want to make it hassle free for a customer and myself.

Thanks for any/all helpful information.

Everet <img src="/forums/images/graemlins/patriot.gif" alt="" /> <img src="/forums/images/graemlins/cheers.gif" alt="" /> <img src="/forums/images/graemlins/kewl.gif" alt="" />

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