Do you know who built the Articulating Dock?
As stated by Codeman, a watermark dock would be more then strong enough, and so would one done by Center Harbor Dock and Pier. If you know who built it go to them directly. What I would suggest if the boat is going to sit at the dock for a while is to look into Mooring Whips, they help relieve stress on the dock and the boat. You may even find that with the whips you don't need to constantly put the boat out on the mooring....
I myself have a wooden dock with a 18' boat that weighs in at around 2800. With the whips, I leave the boat at the dock all the time. I am only considering a mooring in the next couple of years, because I could extend my season, do to water depth at my dock in the fall.
A neighbor has a 28' cruiser that he leaves on the dock with whips as well, and his boat is probably in the 7K-8K category....
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Life is about how much time you can spend relaxing... I do it on an island that isn't really an island.....
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