chipping existing concrete for installation of new hold down

[radiocontrolhead]

Question all,

I'm trying to install a new hold down to an existing footing where an epoxy solution just wouldn't work (forces too high).

I'm toying around with the idea of having them chip away at the existing concrete (leaving all existing rebar in place and not to be cut). having them set the anchor rod and then pouring new concrete. embedment depth would be satisfied per design.

Has anyone done this?

The issue i have though is footing supports a post and it all might need to be shored while this takes place.

 

[r13]

Enlarge the existing footing pad to at least 4 feet square, and fill the top face to level with the floor. The existing post will stand on the existing pad, and leave the new concrete to resist the uplift due to shear wall. Otherwise, shore structures around the post, excavate and remove the existing footing. A new footing shall work.