I’m talking about the far right wall of the building in [this](https://www.psindustries.com/wp-content/uploads/2020/08/DJI_0288-scaled.jpg) picture.
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If you are talking about the side wall of the building, it’s just corrugated. That wavey construction is stronger than a simple flat wall. Flat bottom boats and metal car port covers will also be corrugated since it increases the strength of the metal. Even cardboard boxes are corrugated between the flat outer layers that we see.
Hopefully a Reddit member who’s an engineer will see your post and explain it better than I can.
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