Jan 05, 2022 · The primary idea behind back step welding is to eliminate distortion as much as possible. Starting from the center of the ements, but welding towards the center. This is very important. Weld towards the middle of the boat, but sequencing your welds out for the middle.Sep 14, 2017 · The practical thickness limitation for welding aluminum is usually considered 1/8” and that for steel is 10 gauge. Steel boat designs are impractical for smaller planing hulls, they will simply weigh too much when weight is a function of speed. As an example, a typical 25′ steel hull will weigh about 2000 pounds more than the aluminum ...So using the example, 10GA (.1345″) bottom plating in the steel boat, and applying our rule-of-thumb, results in a nominal 3/16″ (.190″) plating thickness in aluminum, or just over 40% thicker. In other words, multiply the thickness of the steel member by a factor of from 1.3 to 1.5 to arrive at the thickness required in aluminum.The Hydra-Lift Hull begins with a one-piece bottom, unlike many other manufacturers. Aluminum gauge ranges from .100" to .125". Gas Tank Integration We place the gas tanks below the floor toward the center of the boat between the floor stringers to centralize the weight of the fuel. This gives the boat a softer ride and helps keep the bow down.