Have a pile of 2x4's, and a while before you use them?
Well, if you don't cut them, or use fasteners or glue, they will still be usable in a new project after trying these projects.
The dome was more than 30 feet across. Note that the dome is NOT a geodesic dome, it is actually a lofted tiling. (Which is why it is so flat.)
The bridge supported two adults of my weight, and that of several children, at the same time.
If I were to do this for something permanent, I'd want to bolt the pieces in place at the places that they cross.
Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.