2 X 2 square tubing is fine for what you are doing, especially if it is 1/4 side wall thickness. I used 2 x 2 and only 1/8 inch sidewall thickness or also called 11 gauge on my yanmar homemade loader. works GREAT and have not broke any welds or bent anything yet. I will try to download a pic of it in action. hope you like. My yanmar is a 2210,,, roughly 30 hp.
