Steel Bed Floor?

[tc187211]

I just ran across this thread, I am looking to do steel in my 78 stepside, i called my local steel recycler and they will custom cut a piece of floor plate steel for $84.95. In 1/8" thick weights 167lbs. This is the diamond plate design. Anyone know if this will be thick enough? The guy said 1/4" would be 305lbs and way more then needed but he said to check around? This seemed to be the easiest way to get it made to fit perfect.