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retrofit of existing basement wall

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I have kind of an interesting question.  I am looking at a project where an existing CMU basement wall has been in place for 30+ years.  It is very lightly reinforced.  There are no signs of overstress.  I do mean no signs.  No cracking whatsoever etc. etc.  We have the room and ability to install some new grout and reinforcing as 50% or so of the wall is un-grouted.  It is an amazing thing to see.  A whole new perspective on CMU.


Should bars be added to a Ko condition, which seems excessive in consideration of the history.  Maybe add nothing at all, considering the wall has worked fine for 3 decades, or something in between?



Joe Grill


Joseph R. Grill, P.E. (Structural)

Shephard - Wesnitzer, Inc.

Civil Engineering and Surveying

1146 W. Hwy 89A Suite B

Sedona, AZ  86340

PHONE (928) 282-1061

FAX (928) 282-2058