At last, the weldment is completely done. The main structure of this box is square tubing. There was a lot of cutting and trimming since most of the time, the tubing either intersected or did not reach out far enough. Then gussets were added to help to support the structure of the box. Gussets are very important to many designs, such as bridges. On August 1st, 2007, The 1-35W Mississippi River bridge that carried 140,000 people a day in Minneapolis, Minnesota, collasped because of 16 underdesigned gussets.
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