Wind loads are extremely important in structural design, and are becoming more and more manditory as time goes on. First wind load pressures were required by the state of Florida; after hurricane Andrew destroyed parts of Florida. Next Louisiana required wind loads after the destruction there, and now parts of North Carolina require wind load pressures on structrual plans to get approval to build.
Here is a list of the locations in the 3 states where it is manditory to show wind load pressures on designs for approval from the permit department to build.
Broward, Charlotte, Collier,
Dade, Franklin, Gulf, Hendry, Lee, Martin, Manatee, Monroe, Palm Beach,
Pinellas, and Sarasota.
Parishes of Jefferson, La Fourche, Orleans, Plaquemines, St. Bernard, St.
Charles, St. Mary, and Terrabonne.
Carteret, Dare, and Hyde.
Additional wind load requirements and information can be found here: