How deep can epoxy be installed? - Anchorage, Install Epoxy Deep

Posted by Kaden Harrisover 2 years ago

How deep can epoxy be installed?

I have a project with CFS shear walls and the contractor missed the location of some of the cast in place anchor bolts. The shear wall rests on a 8" stem wall that is 32" tall and bears on a 20" thick wall footing. The contractor has asked if they can install the holdown anchor with a threaded rod and epoxy, based on the loading the stem wall is too thin for the anchor rods and I am getting a failure via concrete break-out.

If they are able to extend the anchor rod 6" into the footing then I will have a wide enough concrete area for the shear wall forces to be resolved.

My main question is, how deep can the epoxy be installed. They will need to drill a 38" deep hole, will they be able to properly clean the hole to achieve the strength from the epoxy?

Any help on this would be greatly appreciated.

Anchorage,Install Epoxy Deep

2 Replies

Posted by Ashley Couronover 2 years ago

Hilti Verified

Hi Kaden,

Per ACI 318-19 Chapter 17, the maximum embedment of an adhesive anchor is 20*d (20 times the diameter of the threaded rod). You can find additional recommendations on embedding deeper with threaded rod using HIT-RE 500 V3 here.

Regards,
Ashley

adhesive anchor system

1 comment on this reply

Posted by Jesse Jannetteabout 2 years ago

We also run into this condition quite frequently due to sloping lots using CMU stemwalls combined with high wind design. I may be mistaken, but in the original question, this is not referring to a 38 inch deep embedment. It's only a 6 inch embedment into the footing, the hole in the stemwall above the footing is irrelevant and could be left empty, so no violations with ACI. I think the bigger concern is how difficult is it to blow out the hole and get epoxy into the bottom when you are doing so from 38 inch above the bottom of the hole. Do you have any recommendations regarding the difficulty in achieving an adequate install?

Posted by Matthew Fordalmost 2 years ago

Hi Jesse,

For questions related to feasibility of installation, please give us a call at 877-749-6337 to be put in contact with our Product Support Team.

Regards,
Matthew

installation equipment