Good luck with that. I know a couple of inspectors that are still looking for that very information.
Remember one important point; the codes typically list the minimum requirements based on safety and function, not on aesthetics.
Best regards - Al
Seems like this topic comes up fairly often and usually with all the same results, answer unknown. Usually it is applied to D1.1 but the results are similar. Codes deal with minimums as Al stated. Maximums are often dealt with in terms of weld reinforcement, profile, and if you get an engineer involved-stresses. Beyond that I don't know that many address a maximum.
Have a Great Day, Brent