JD's Garage Micro
For the platforms, I used 1 sheet of 1/2" plywood cut in half lengthwise so that each half would fit my 8' x 24" platform frame perfectly. I measured using my carpenter's square and marked where I wanted my screws to go measuring carefully so that each one would fasten to the 2x4 supports below. I then pre-drilled the holes where I'd drawn marks, and screwed in the wood screws. Here are some photos of the process including the use of clamps and cinder blocks to hold the platforms perfectly in place as I began to fasten them.
Here are some photos of the ramp at this point with both platforms and 2 layers of ply. Only one more layer left and it's ready to go!