Wind load to columns at an open structure

Ive been somewhat out of touch the last few months so I guess it's back to work.  I'm working on an outdoor pavilion, open structure with a mono slope roof. The roof is supported by concrete columns. I've calculated all the MWFRS loads at the roof, but can't decide which load formulas to use on the columns for the lateral design. Can some one point me to the correct location/formulas to use?
Thanks
Joe Grill

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