Final Model

Final Model

For the final model I went with a thicker polypropylene, 4.5 mm. I also had to order a larger sheet, 1500 x 1500, to fit the new larger model. I also fixed the plan so the legs were laid out evenly to prevent twisting. To stop the stool from compressing, we decided to add tension wires to the legs to keep them from bending out. The wires would also provide extra height for the stool. Before I cut the final, I made several laser cut prototypes out of cardboard to figure out the placement of the holes on the legs and on the feet.

CNC machine 

Final stool fixed with bolts

Before the wires were added

Steel tension wires with crimps