How do you put a trampoline on concrete?

As long as the frame isn't majorly moving when in use. And won't collapse when you use it. Consult the manual. It will advise you not to in the manual, but I think that is more to do with damaging the frame if it moves about. you'd be better off to put a trampoline on grass or loosely packed dirt, that way, if you do happen to fall off, you wont break anything