I'm using bumper plates now, for SLDL's and Hi-pulls. Bounce then off a wooden planked hopper....heavy duty training. 12 - 20 reps. That may come as a surprise, but higher rep, heavier training, can build impressive stamina (strength + endurance) at the same time, not to mention solid muscular weight. Even most lifting platforms have to be reinforced a bit, if seriously training with bumper plates. Really old school stuff. Can be done on cement flooring, if the hopper is built well enough.
Good luck.