The boatlifts we install typically require 4 pilings for installation. They are manufactured in Florida from IMM / Quality Boat Lifts. Visit their website at: http://www.iqboatlifts.com These lifts are a chain driven lift constructed of aluminum. They have 2 - 3/4 HP stainless steel motors, grooved cable winders, full carpet bunk boards and aluminum cable beam covers. Remote control and automatic limit switches are also available. They range in sizes from 4500# to 32,000# and larger if necessary. We have designed an aluminum canopy system which will attach to the top beam of our lifts we install.