1. Not any opinion about using VIII Div2 for flange checking?

2. The Kellogg formula was friendly enough to be accepted without a theoretical proof. At least I haven’t seen it.
But it was conservative enough to get no troubles in real life, and this is the only important aspect.

I’ve just tried to reload the Kellogg work in order to understand it better.
Frankly, it was not so simple. Must free the mind enough to “rediscover” simple things.
I cannot be sure this is the way that Kellogg followed, but I guess so.
I would say the result is a gift for the community.
And sure, for the today technical aspects my paper means nothing.