Torsion box lattice sizing
I am building a couple of outfeed/assembly tables, and plan to build a workbench as well. I plan to use torsion boxes for the work surfaces. However, I can't find a lot of information on sizing the webbing. For example, I have a 30"x60" top, 1/2" Baltic birch skins. I will likely use poplar around the outside as the outer edge of the webbing. I am making the webbing of old 1/2" ply cut into 2" strips. My question is how many webs I should use. Should I space them 5" apart? 10"? 15"? If there are some typical dimensions or a good rule of thumb, that would be great.