i used 2x2x .083 tube for the outside frame and legs in the bed, and boxed the bottom of the legs with 2x2x 1/8 angle. used 1x1x.120 tube for side rails and headache rack and covered with expanded metal. used 1/2 plywood on the deck and deck screws. 1 1/2x1 1/2x.120 tube for ramp with 1x1x.120 tube for cross bars on ramp and finished ramp with low pro glides for the skis to run on, for consistant easy loading this is a must.