Design Gym Layout I did all of my computer design work using AutoCAD. All of the pieces have their own drawings, some of which were sent to a metal working shop for fabrication. Materials The gym is made out of mostly 2' square steel tubing that is approximately .100 in. thick. There are some pieces of 1-3/4" square tubing. Other materials used include 2 other forms of low carbon steel, 1" diameter and 2" x 1/4" flat stock. There are also several pieces of U.H.M.W (ultra high molecular weight) plastic in high wear areas. The adjustable bench and dip station were purchased from Tuff Stuff.TM Pulley System I modeled my pulley system after several different manufacturers designs which allowed users to do multiple movements using the same weight stack. The 7 pulleys used were all purchased from Tuff StuffTM as replacement parts. Resistance is provided by loading Olympic weights evenly, as one would on a bar. The pads on the leg hold-down attachment were purchased from Hammer Strength.TM Design Considerations It was important for me to design this equipment so that it could be disassembled and moved, so there are quite a few nuts and bolts, rather than larger welded pieces. Another consideration was the room in which it would be set up. The original space for this gym had quite a low ceiling and I knew that at some point I would want to set it up somewhere where there was a higher one. So, I had to make the height adjustable. There are three different heights that it can be assembled to, all 4 inches apart.