Using non appoved anchors to resist base shear
Using non appoved anchors to resist base shear
(OP)
I have situation where a contractor used ITW Trubolts to anchor some equipment onto an existing slab. The problem is that Trubolts are not rated to resist seismic loads only "Trubolt +" are. (Which he did not use) No the county wants pull testing done on the anchors.
I have done the calcs and I have ~= 1500# per bolt group and no net tension.
My question is: Can wedge anchors that are not approved (per their ESR report) for seismic loads be used if they are tested? If so, is there a code reference that can be followed? (IBC, or CBC) i.e. percentage of load that the bolt needs to be tested for.
Thanks in advance for any thoughts
I have done the calcs and I have ~= 1500# per bolt group and no net tension.
My question is: Can wedge anchors that are not approved (per their ESR report) for seismic loads be used if they are tested? If so, is there a code reference that can be followed? (IBC, or CBC) i.e. percentage of load that the bolt needs to be tested for.
Thanks in advance for any thoughts






RE: Using non appoved anchors to resist base shear
Expansion anchors are typically torque tested rather than pull tested. It is easier and less costly. OSHPD has a Code Application Notice (CAN) for the 2007 CBC with details on "Field Tests for Post Installed Anchors" (http://www.oshpd.ca.gov/FDD/Regulations/CANs/2007/...). This provides information on torque testing and loads for tension tests. I think some of this information is included in chapter 19A of the 2010 CBC.
RE: Using non appoved anchors to resist base shear
From what I've seen, seismic rated post-installed anchors are generally rated to maintain tension capacity in cracked concrete. If you're looking at a design case with no uplift, what is your pull test going to tell you? What pull capacity do you test to?
I can see wanting a tension capable anchor in a seismic event, because there are still vertical earthquake forces that we generally don't directly account for, I'm just curious what the criteria for this kind of test would actually be.