overhead anchors 2

[cvg]

a single ramset (or similar) powder anchor is used to hold equipment suspended from a concrete structural slab, above an office space. Is this a recommended practice?

 

[jayrod12]

What does ramset say about their powder actuated fasteners in constant tension?

A quick email to their tech department would likely be the best place to start.

 

[JAE]

I'm not sure I like the use of only one fastener in any connection.

Check out Eng-Tips Forum's Policies here:
faq731-376

 

[BridgeSmith]

A single fastener utilizing friction with concrete to resist a tension load from equipment? Scary stuff, especially if there's any vibration from the equipment!

 

[IFRs]

There may be a difference between "recommended practice" in some reference and good engineering judgment and/or common sense. Be an engineer !!!

 

[Tmoose]

"suspended from a concrete structural slab, above an office space. "

I'd say it is only recommended if the anchor installer is also the office occupant, and a hefty insurance policy has me as the sole beneficiary.

 

[BridgeSmith]

I hope the equipment is not heavy enough to hurt anyone, because, like Tmoose, I'd put money on it coming down sooner or later. I'd wager more heavily on sooner.

 

[cvg]

IFR - I am not the designer, I am the concerned occupant

 

[BridgeSmith]

In that case, move to a different desk...or wear your hardhat. The hardhat might draw attention to your concerns (one would hope!)

 

[Ceinostuv]

If you're in a high seismic region (Seismic Design Category D or worse), the ASCE 7-10 and (to my knowledge) most local codes do not allow sustained tension loads on Power Actuated Fasteners. Otherwise, even in a low seismic region it is probably not the best practice.

Judgement-In-Training

 

[Ron247]

Most do not like a single fastener connection. The weight of the future falling object would be a big deal in this situation. Seismic and constant tension are a really big deal. If I had to have something like that over my head, I would want 4 fasteners when 1 would work and then I want a safety harness around it if it did pull loose and also routine inspection. And I would want my chair to have wheels.

As already stated, there is a good chance it will eventually pull loose.