An overhead boat lift mounts to wooden beams within a boathouse. The configuration of the framework varies. The overhead boat lifts are made of marine-grade 6061-T6 US aluminum since it is lighter than steel. This means less strain is placed on the wood joists. The Max Sieries is built for marina slips. Boat slings or a boat cradle can be used with the Coastal Series. There is a Gulf Breeze series that attaches to parallel joists when no overhead beams are present.