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Steps
Classify the fence as an "other structure" (not a building) under ASCE 7 for purposes of selecting exposure category, force coefficients, and load combinations.
Determine the site's exposure category from surrounding terrain roughness, and pull the applicable basic wind speed from the ASCE 7 wind speed maps for the governing risk category.
Use ASCE 7's force-coefficient provisions for solid freestanding walls/fences (Chapter 29) to select the coefficient appropriate to the fence's aspect ratio and clearance above grade.
Calculate velocity pressure using the applicable exposure, topographic, directionality, and ground-elevation factors, then apply the force coefficient to obtain design pressure on the panel.
Convert the distributed panel pressure to a moment demand at the post base to confirm post size/embedment is adequate, or have a structural engineer perform this calculation for taller or fully solid-panel fences.
Known gotchas
Solid/privacy fences carry much higher wind load than open designs (chain-link, ornamental picket) of the same height — don't reuse an open-fence post spacing for a solid-panel redesign without recalculating.
Which ASCE 7 edition and wind-speed map applies is set by the building code edition actually adopted locally, not necessarily the newest ASCE 7 release — confirm the edition the jurisdiction has adopted.
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