Good after,

I am going through the ASCE 7-05 to determine the wind load on a drive-thru canopy. I had hoped to be able to analyze the canopy as an "Open Building", but the h/L value is greater than 1.0. I have searched through the code to find how to determine the Cn values for h/L > 1.0 to no avail. Any ideas, guide, or help?

Thank you