Stands How to make a safe stand?

I had a 2x4 grid stand for my boys' cage. I made it two grids deep by 4 grids long. I had 2 1wx2d towers, 1 at each end, and I left a 2 grid wide space in the middle. I did put grids the long way in the middle of the open area so that I had access to a 2wx2hx1d open space from the front (where I kept their hay box) and the same configuration accessed from the back. The grids dividing the 2x2x2 space in the center gave the cage strength so it didn't sag and kept the two end towers from splaying out from under the cage. I also used grids to connect the towers on the top (like a platform under the cage) and I used a TON of zip-ties. I kept the stand at 2x4 when I enlarged the cage to a 2x5, just letting the cage extend past the stand by 1/2 grid on each end. It was sturdy and relatively easy to move for cleaning purposes (I don't have carpet).