Would you walk on a 16' platform made from 3 2" x 6", 12" on center and 24" wide covered in 3/4" plywood, all screwed instead of nailed? Would it be rigid enough walk back and forth on while siding the second story of my garage? Should I use 2 x 8 instead? What ever I use/buy will become my workbench and shelving. I had originally ordered a set of Werner platoforms, but at 490.00 each and needing 2 of them, the cost was a bit out of touch for a 3 day job (I hope)and no future use ideas except to put up Christmas lights.