Post Installed Anchor Bolts 1

[nickndfan84]

I am working on modification design project, where post installed anchor bolts are required. I have no problem designing a steel weldment to tie the existing structure to the new AB. Does anybody know of literature on post installed anchor bolts for design procedure or testing procedure?

Thanks

 

[Ron]

Since you are in the US, use ACI 318, Appendix D. This should cover your application. Further, check with a couple of the major post-installed anchor manufacturers (Hilti, Simpson, ITW) for their specific design criteria.

 

[henri2]

Also check ICC-ES evaluation reports.

http://www.icc-es.org/reports/index.cfm?csi_num=03151&view_details=yes

 

[bones206]

This white paper provides a good overview of current post-installed anchor codes in the US.

http://www.storksmt.com/Downloads/TechnicalServices/SMT/TCT/AC193_AC308_Cracked_Concrete08-rev.pdf

 

[SeanMD]

Check out hilti and simpson design software (free). If you are in high seismic, you also run into the problem of developing the anchors for ductile yielding. IBC says you have to fully develop the anchors (which is hard to do with a post installed anchor), or apply an additional multiplier to the force So even if the anchor works for the loads per the ICC report, it might not if you multiply it by the 2.5 factor. I think a lot of engineers miss this....

 

[paddingtongreen]

Are these bolts to supplement cast in place bolts? if so you should consider strain consistency in deciding their share of the load.

Michael.
Timing has a lot to do with the outcome of a rain dance.

 

[structuresguy]

Definitely check out the Hilti Profis anchor software. It is free and will check either ASD or LRFD loadings. The LRFD loading complies with ACI 318 App. D requirements. Plus it is very flexible in the configuration and loading setup, more so than the Simpson software.

 

[slickdeals]

My only caution to using HILTI PROFIS is that it will check only HILTI anchors. You are forcing the hand of the contractor to use HILTI which has traditionally been more expensive.

Powers fasteners probably have lesser capacity than HILTI if the anchor is controlling the design and not concrete.

 

[mmillerpe]

Powers has their own design software as well, so you can provide options other than Hilti if necessary.

 

[structuresguy]

True, the Hilti software will only check their anchors, though it will also check embeded shear studs as well. But what I like is the flexibility of the product, being able to define virtually any geometry. And once I get a working solution, then I can look at what "or equals" may exist, to allow the contractor to select from a list of products. With mechanical anchors, they are all about the same, IMO, and I don't design the connection to be so critically stressed that the differences would be significant. But with epoxy anchors, I get pretty sticky about which brands/types I allow. Frequently I only allow one epoxy and the contractor is forced to use it, if I can only make it work with one epoxy.

 

[anchorengineer]

So late to the party but.... In regards to the testing, use ASTM E488. In regards to design use ACI-530 for masonry design. Please note that CMU does not fall under the "cracked cocnrete" requirements of ACI 318 App D. Be careful mixing apples and oranges. The manufacturers programs are focused more on the IBC 2003 and up and are only good for concrete and not masonry...




Clarke Engineering Services, PC
Construction Consulting & Anchor Testing

http://www.anchorengineer.com