To add boat dock lifts, start by measuring out the dock and the depth of the water to get an estimation of the kind of lift apparatus you would need. Lifts are easily available commercially in most boat and dock supply stores, and buying a factory-made lift is preferable to constructing one at home. The lift system comprises metal or wooden frames connected to pulleys and wheels that, when cranked, lift the boat from the water. Most stores would be delivering the apparatus to your dock since it requires a huge flat surface to move it. To install the lift, be sure you call for professional help. While you can place and assemble the lift system to the dock, it is best to seek expert assistance as several pieces require welding and riveting.