Leveling a shearwall without uplift 1

[reverbz]

Hey Guys,

I received a question from a contractor regarding a bearing shearwall that isn't level on the slab. The existing slab that it was placed on wasn't flat so on one side it is above the slab and has a gradually increasing gap to the end of the shearwall. At the end it is a 3" gap max. They installed the anchors like this and are asking if they can fill the gap with high strength grout since there's no uplift.

My concern would be this would cantilever the anchors and we wouldn't get the strength of the anchors as intended in shear. Am I wrong in thinking that? Do you guys have any ideas/solutions for this you've used previously? I'm wondering if I just have them add the grout and add anchors at half spacing and call it a day.

 

[reverbz]

bump

 

[driftLimiter]

You dont need to bump on this forum.

There is some precedent for anchor bolts with shear eccentricity. Generally people do consider the grout as a 'gap' in the anchor. So you could look to that as an option.
Some examples of this are ungrouted baseplates with leveling nuts on anchor bolts.

 

[reverbz]

@driftlimiter

Thanks for the response I think I get what you're saying. On a normal column you'd have 1.5" of grout which like you said is a gap. I'm thinking that the 3" will be fine with the grout addition and a few added anchors along that side. If I'm misinterpreting let me know.

 

[lexpatrie]

I'm never quite sure what people mean here when they say "I'm sure it will be fine" in these contexts. To me this sugges some kind of "add three anchors" note on the plan and no calculation to back it up.

Which anchors are affected? The main series (anchor "bolts" for the shear in plf at the base of the wall), or the end anchors (hold down anchor rods, I guess epoxy into already hardened concrete with special inspection)? Both?

Are they going to just leave the slab with 3" slope to it, then?