i just got finished installing a metal floor in my short step side.used 16 ga.3/4" square tube for spacers in the place of the wood.i ran 6 pieces longways in the bed,spaced apart evenly.i welded the sq.tube to the factory crossmembers.i removed the factory angle strips on the side of the bed and replaced them with 1x1x3/16" angle iron and put a sheet of 3/16" sheet iron in for the floor.i spot welded the angleiron to the bed sides and the floor and then welded the floor to the sq. tubing from the bottom.i filled all the seams with 3m seamsealer.i'm going to have a sprayin liner put over the new floor.it wasn't too bad of a job sorry no pics,no digital camera
