Will a Plastic Shed Survive 80mph Wind? What actually happens when a plastic shed meets serious wind? In this test, we switch over to the plastic shed and push it with increasing wind load, watching how it behaves both unanchored and anchored. First, we ramp the wind up through typical driving speeds and see very similar failure modes to earlier tests—the shed starts to go over around 55–60mph with no anchors in place. Then we add quarter-inch by 3.5in anchors, tying the plastic floor down even