Post Installed Anchor Testing

[JKJohn]

During the installation of a storage facility, we failed to inspect the anchor bolts during installation. Now, the code department is asking us to perform a pull out test to verify the installation.

The designer load calculation shows 6000lbs in tension on that anchor. Should the anchors be tested to the 6000 lbs? Or should there be some safety factor added to that?

 

[jittles]

Not sure what code you're under, but the IBC has specific provisions for load testing. 2012 IBC, section 1709.

 

[KutEng]

Our Australian code requires the test load to be equal to the design load. However, if you know you have the capacity for it, it wouldn't hurt to test to more than your design loads just to be sure.

Another thing to consider is that testing for anchor bolts only tests for tension. If your bolts are in shear then this needs to be considered as well - although I have never come across an accurate method of testing this.

 

[HouseBoy]

Looks like it 2x the unfactored design load.
Some other provisions too (duration of load, rebound etc.).
I thought it was 1.5x for floor system load tests but I don't have experience in that area.

 

[JKJohn]

We are to follow the IBC 2012, which references ACI 355. I still cannot determine the requirement. 200% is what the word is but still don't see it in writing. Does anyone know the exact reference?

 

[HouseBoy]

I googled this "2012 IBC, section 1709." and it was there in section 1709

 

[racookpe1978]

A follow-up question then: Must every "existing" anchor bolt be tested in the current building - including the ones which are already holding structural loads or columns with an existing tension load or which cannot be "unbolted" to get a grip on the anchor bolt itself?

Or does the OP install several "new, unloaded" anchor bolts of the same type and size to verify that the general anchor bolt installation process was correct?

 

[BridgeSmith]

The existing anchors, at least a representative sample of them, need to be tested. Installing new anchors, which of course will be done properly, does not verify the installation of the existing ones was done properly. Particularly anchors set with epoxy adhesives have to installed carefully and correctly to provide their rated capacity. If the holes aren't cleaned and prepared meticulously or the the epoxy isn't mixed thoroughly, the anchor may not hold diddly squat.