Is the concrete hole diameter (do) specified in ESR-4868 for HIT HY-200 epoxy an explicit limit? In other words, can the hole diameter be larger than what is specified in the ESR report, and if so, is there any limit to how large the hole diameter can be? I have a project where the GC, through a series of mistakes, ended up with 1.5" diameter holes in which they intend to install 3/4" diameter anchors. TIA.
Hi Michael,
When the onsite anchor hole diameter is larger than the ESR published value, the application is outside of the ICC-ES testing and approval.
HIT-RE 500 V3 has extended testing for large annular gaps: found here. This testing does not include HIT-HY 200 V3. Per the technical bulletin, ¾” threaded rods allow a maximum nominal core bit diameter of 1-1/8”.
Ultimately, all design decisions are at the discretion of the Engineer of Record (EOR) on the project. Onsite testing is recommended if the installation parameters do not align with the published data.
Best,
Sam
Sorry, I realize this is an older question, but can you offer some background on the issues around a larger diameter hole and what consequences you've seen in testing? Is the epoxy more flexible than the concrete? Is there a bond issue? Is the strength reduced?
Thanks!
Hi Ryan,
Limited oversized hole testing found in this technical bulletin for Hilti’s HIT-RE 500 V3 epoxy was performed in order to provide some additional data on conditions that are outside of ESR-3814 and aid engineers in performing calculations to determine what the load capacity of the anchor will be. Please reach out to hnatechnicalservices@hilti.com for further assistance.
Best,
Mia