Replying to this with another question, as it is a recent thread.
I'm working with a model right now that fails the stress analysis at a 16"x 48" reinforced connection. When I use the class 1 branch flexibility, the stresses are significantly reduced for this node. The branch itself satisfies the conditions required for the use of this option, but my question is regarding the use of this option within B31.8. I have looked through B31.8 and through the forum and did not find anything saying it could not be used.
Does anyone know of a reason where the use of Class 1 Branch Flexibility within Caesar is not allowed for a B31.8 system?