Thanks for the reply.
I'm getting a strange warning again in regards to d.
Again it is an actual vs. assumed d. When I look at the design results it shows a depth of 18.250" for the top long bars and the warning says the d from the assumed cover is 19.38". I get this warning, hit optimize again in the V/U, and it goes away. The beam is 21" with an assumed cover of 2.75" so the depth for the bar sets is correct, the depth for the warning is not.