I built my dock during winter 2003 6 in. ice. use menards 2" galv. pipe, and welded a 4" channel steel frame 12' by 28' and made adjustable collars from next size bigger mild steel pipe and bolted these to side of dock so we could mark ice where to auger holes. Used a 2 man pile driver I welded from scrap, and drove pipes till handles of driver hit ice, I also used 2x6 treated for deck and routed all the way around boards before installing boards(didn't want grandkids getting splinters, made it nice)also used the 2" rachet style tie downs to draw ever board tight against each other, because after they dry out you get a nice little 1/8 to 1/4 in. gap. Built my dads dock this way back in 1989 and have never had to adjust, still level to this day and 2x6 still in great shape. had as many as 25-30 ISU football players on it this summer playing king of dock with no wobble what so ever. My dock can be seen on the photo gallery 4th page 2nd row no.2 pic. If someone wanted close ups of how I made any thing I could e-mail close up pics. hope this helps
