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Floating dock (jetty), a lightweight quay or jetty, floating on pontoons, that rises and falls with the tide and shipping. Floating dry dock, a portable dry dock that may be towed into place.
For this reason, a floating dock is better for deep water situations. Deeper water requires longer pilings. These are more likely to have bending and warping problems. Because there's a gap between the water and dock, you may run into problems reaching your watercraft when the water is low.
The Benefits of a Floating DockThey're a great fit for shorelines with deep or fluctuating water levels: flotation allows your dock to adjust along with the water, and an anchor can reach further than the legs of a stationary or wheel-in dock can.
A stationary dock generally will hold up better than a floating dock. This is simply because a floating dock is submerged in water the entirety of it's installation. This makes the floating dock weather more quickly. This is especially true in salt water.
We do not recommend leaving your floating docks in the water during the winter as they could get damaged. But if you decide to leave them in the water, you will do so at your own risk.
A floating dock costs $15 to $35 per square foot, depending on the type of decking. The price includes both the dock and labor. Prefabricated aluminum (the most affordable type) costs $1,500. It's constructed by placing decking over airtight barrels, drums, or marine floats.
If you're going to be diving off the end of your dock then about 8 feet of water depth or more would be recommended.
Floating docks also tend to be more affordable to install and maintain. On the flip side, a floating dock may not be your best option in areas with a lot of water traffic. Because these docks follow the ebb and flow of water, a busy area might make these types of systems uncomfortable for your needs.
You'll want to use anchors that are at least twice the weight of the dock so that it stays in place. The ideal anchoring system is made up of concrete blocks attached to steel chains in a criss-cross style.
As the name implies, floating docks float on the water instead of resting on wooden pilings. They are best in waterfronts with fluctuating water levels as they ebb the water flow and provide easy boat entry and exit. They, however, are not recommended in places with lots of dock traffic for the very same reason.