I built mine with the same floatation foam... 16x8 foot dock with four sections of the foam at $70 CAD per. Floats 2 inches below the bottom skirt with no load so the only bit in the water is the foam and the bottom runner. Each section of foam supports about 650 lbs... very stable as well.

Owner/Builder of Ottawa Canada's first official off-grid home.

http://www.mygamepictures.com - Hosting your outdoor adventure, fishing, hunting and sports related pictures!