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Drop-In Anchors

Drop-In Anchors

Drop-In Anchors

(OP)
Powers (Rawl), Simpson, Hilti and Red-Head all have drop-in anchors.

I used to specify these frequently, but, i discontinued specifying them about ten years ago, when one of the site foremen of the main general contractor i have been working with complained that the drop-ins tend to spin within the base material. Since that was ten years ago i've decided to re-investigate for other opinions. I will do the same with the other site foreman of the same contractor.

Has anyone else experienced this? The allowable tensions for drop-ins are better than most anchors for hollow core, BUT, i've stayed away because of ONE complaint. In general, ONE failure is typically enough!

Any comments on this?

Thank you!

RE: Drop-In Anchors

I have used them once, for attaching cold formed steel track to existing concrete. I did not get any complaints.

DaveAtkins

RE: Drop-In Anchors

We don't allow them at all. They might be all right for residential or do it yourself, but for something engineered, there's better options.

RE: Drop-In Anchors

Typically we only use them for temporary construction. I find that when exposed to the weather, there is a better chance of damage due to water getting in the whole and freezing.

Contractors really like them since they are fast and cheap (compared to epoxy). I personally don't like the idea of an anchor cracking the material around its-self to gain capacity.

RE: Drop-In Anchors

I only use them in interior applications with relatively low load. I have installed many of these myself and they seem to go in fine.

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