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Why did the drop-in anchor blow out in a fluted pan deck

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A blown-out pan-deck hole means the anchor no longer has reliable bite. Stop using that hole and switch to the approved deck attachment for that substrate.

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Plain-English answer

Drop-in anchors need solid material around them. If lightweight concrete or a fluted pan-deck valley breaks out, the hole is no longer a trustworthy hanger point.

Confirm the deck type and approved attachment. The recovery may be a different location, approved deck screw, top-of-flute attachment, beam/joist clamp, or engineered support detail.

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The pan-deck hole at [location] blew out and will not hold the anchor. I checked the deck profile. Do you want an approved deck screw/top-of-flute attachment or a new support location?

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Use this as training guidance. Foreman direction, approved drawings, project specs, manufacturer instructions, employer safety policy, and AHJ/code requirements always control the final answer.

Why did the drop-in anchor blow out in a fluted pan deck

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