Big Rim

grabcad

Mass = 112862.37 gramsI started with a half sketch of what was half of the big rim. I made the bottom according to the dimensions (140 by 100) and then started working on the top which is 450 away from the bottom line. I used mirroring while doing only one side. I put down a construction line for the middle which was 30 mm down. The sides were 45mm each and 20mm wide with a corner angle 75 degrees connecting at that middle line. When that's down make a construction line from the top to the bottom piece that is sticking out. Finish the bottom up by getting the 105 degree angle from the main body line (60mm wide). Lastly extrude.