Is there a chart showing reccommended mseh sizes for various spans? hoe can I choose the mesh diameter?

Jeff, Thank you for your question ! Unfortunately, there is not a table that indicates wire mesh and how it reacts over a particular span. There is however, tables that will show the acceptable wire diameters that can be produced depending on the mesh size or opening that you desire for your application. If the wire is being framed, then it could be tested once that framing is complete. If you will e-mail your address, I will be happy to forward you a catalog that will help you pick the wire diameter and mesh/opening for your consideration. Thank you again for your question. Sincerely, Steve Wilcher