A coastal warehouse project fails plan review, and the rejection line is one sentence long: the door schedule states no design wind pressure and no test basis. The door itself is heavy, expensive and freshly installed. Nothing on the manufacturer’s page translates into a number the reviewer can check, because words like windstorm are not ratings.
We build sectional doors at the factory, and our view of this subject is blunt. Wind resistance is not a marketing layer; it is measured behavior under a pressure difference across the closed door. Read the ratings that way and the code expectations below become straightforward.
What Wind Does to a Large Sectional Opening
Wind load is a live load. It pushes on the door from outside as positive pressure, then pulls as negative pressure when a gust passes or the building leaks air on the lee side. That is a different problem from dead load, the mere weight of the panels in the tracks. A door can carry its own weight for decades and still fail its first serious storm.
The opening itself