In the "MWFRS (Low-Rise)" worksheet of the "ASCE702W.xls" workbook it was discovered that for in Figure 6-10 for roof angles greater than 45 degrees the program was defaulting to the wind external pressure coefficient values for 90 degrees for zones 2, 3 and 2A, 3A. The code permits interpolation between any of the ranges of roof angles in that table, and the program was interpolating for all the others ranges of values of roof angles. For some reason, I failed to do it for those specific 4 zones.

Typically in industrial work we don't encounter such steep roof angles.
However, one of the guys who was doing some work outside of the industrial market sector brought this to my attention. In a sense the program wasn't really wrong, but merely overly conservative by not making use of permitted interpolation.

This has now been corrected.

I have started on a workbook for wind loading analysis per the ASCE 7-05 Code. I hope to have it completed in the near future.