wind load calculations for open structures

[dcceecy]

I am calculating wind loads for an open structure roof. I use equation 6-25 p=qhxGxCn of ASCE 7-05 section 6.5.13.
The Cn net pressure coefficient shall be determined from Figs 6-18A through 6-18D. But All those figs have the requirement of 0.25<h/L<1.0. In my case, h/L is 1.33. Is it going to make a difference? Are those figs still applicable? Thanks

 

[asixth]

What does your wall pressure equal when you use those figures?

 

[Ron]

Yes. Look at the values in the table...they typically reduce the loading. Use the higher value or 1.0 for conservative analysis.

 

[dcceecy]

I do not have a wall. All I need is the wind load on the roof.