ToadJones,
I've attached my interpretation of ASCE 7-10, Ch 7, for your case. Note that I had to make some assumptions for Ce & Ct. Page 1 is my summary, Page 2 is my loading diagram. I'd be interested in hearing from others as well.
I'll post the errata next. It was really buried in ASCE's web site.
Ralph
Structures Consulting
Northeast USA