overcutting corners in an opening

I am a concrete cutting professional and I have been wondering about the strength of cut openings. Specifically, is there a structural / strength difference between a square cut corner and a overcut corner. Are there any codes that specify this?

I am asking because of the growing job requirements for square corners (with NO overcut).

Thanks,

isocutter

isoworks@home.com

 

[JAE]

I would think that the overcuts would essentially create a larger "effective" opening than the raw opening you intended to create. By overcutting beyond the opening corners, the concrete between the overcuts becomes non-structural and you end up with less undesturbed wall/slab than you would have without the overcuts.

In addition, the overcuts may damage reinforcing bars which extend just beyond the opening edge, further reducing the wall/slab strength.