https://www.cesdb.com/west-point-bridge-designer.htmlSketchUp - Free Version
https://www.sketchup.com/download
Step 1 - Let's Choose a product. - Select Educational Use
Step 2 - Please complete the required info and select the FREE version SketchUp Make
Step 3 - Explore and have fun......don't forget me when you are rich and famous!
West Point Bridge Builder
https://www.cesdb.com/west-point-bridge-designer.html