I hate to resurrect an old thread but a recent revelation forces me to do so. I built my dock with galvanized ring-shank nails and 15 months later all is well. A few weeks ago I was watching an episode of Lake Life on DIY network and Nate was building a dock with nails for the frame and screws for the deck boards. If it's good enuff for Nate, it's good enuff for me!