Theres only a small amount of jack-able frame rail as if you go to far back it WILL bend. My jack stands are four legged(as most) and there was not enough room between the jack and the jackstand to fit side-by-side on the usable frame rail and not where its weakly welded. Trust me when I say I definitely tried everything before resorting to making my little friend. Oh what is that old saying.... "necessity is the mother of creation"...