Here is how my 7 foot rebuilt bush hog model 307 is built. The deck top is made from 1/4" deck plate with the ridges on the bottom. 1/4" deck plate is actually thicker than 1/4" with the added thickness of the top of the ridges adding a bit more thickness. The sides are made from channel iron. Estimated weight is around 1500 pounds.I built the deck from scratch at work it's 3/16" top with 1/4" sideskirts but I used the hitch, tailwheel and gearbox from the old donor.What was the initial problem you were trying to fix?