What is the method for establishing the proof load for an epoxy dowel that is embedded over a length of 20db and is spliced with existing reinforcement, assuming full development of all bars?
Would it be overly cautious to determine the proof load by taking the minimum of (67% of concrete breakout, 67% of pullout strength, and 80% of steel yield), as is typically done for anchor proof loads?
Hi Shawn,
In regard to onsite evaluation, Hilti does not specify nor require onsite evaluation, as it is typically required or prescribed by the engineer on the project, or job specific requirements or requirements of the jurisdiction. In North America, engineers will sometimes reference ICC-ES AC308 Section 13.3.4 which discusses the proof loading program that is required for adhesives that require continuous special inspection. Hilti adhesives only require periodic special inspection and therefore do not include this requirement in our ICC-ES reports. For other regions, you will want to contact your local Hilti representative for more information. Ultimately though, the final decision for testing and alterations to the anchor system design is made by the engineer on the project.
Regards,
Matthew