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What does the impact rating cover on a sliding patio door?
I’m curious how to tell whether a sliding patio door’s impact rating applies to the complete installed assembly, rather than just the glass. A strong pane seems less reassuring if the frame, track, locking points, or anchoring are the weak link.
When comparing doors, what approval or product documentation should identify the applicable wind zone and show that the tested configuration matches the door being offered? I’d also like to know which installation and anchoring details are worth confirming in the quote, since a rated door still depends on being installed as specified.
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The glass label by itself can be a bit of a red herring. Ask for the approval listing or certification report and compare the offered door against the tested model, maximum size, glazing, frame, and locking configuration, along with the applicable impact and wind criteria. The quote should also spell out the specified fasteners, spacing, and anchorage substrate. A tested assembly’s rating only carries over when it’s installed under the listing’s conditions.