Another embed plate question

[ntpe]

When designing embed plates at a column where the edge distance
is fairly small (4 1/2”@ 3/4” studs) what constitutes supplementary
reinforcement? The mode of failure will be edge break-out, specifically,
the corners will break away. I have #4 ties @ 3” o/c, but the ties only
extend about 2/3 the height of the embed plate. The EOR is claiming that
the ties provide supplementary reinforcement. The failure surface barely
engage the ties (maybe 2” max). Can anyone direct me to a good example
of supplementary reinforcement? Am I being overly conservative? I have
vertical loads ranging from 50k to 100k.

 

[structSU10]

I don't have anything specific to embeded plates, but the attached paper discusses the design of supplemental reinforcement and should be able to be applied to your situation. The key is the reinforcement must be developed to do what is intended.