Print box bigger than the printer bed I am trying to make a box that is 420&nbsp;mm wide by 86&nbsp;mm tall by 100&nbsp;mm long, I wonder if there is a good technique to design, cut, print and fit all parts together to be safe and hard.
Are you making a simple box? Or does it have some kind of detail or structure? The photo below exemplifies a structure attached to connectors that have been created outside of Fusion, but you can also use it as an idea to create your own!



Link to OPENSCAD LIBRARY

If you are thinking of cutting into parts, you can also create a kind of male / female (puzzle) in the parts that fit. Something like that ...



Here is some interesting information to study How to design Snap-fit Joints for 3D Printing