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  1. TwinCities

    #9 bar broke while bending

    Was this a "field bend"? If so, did they use a torch to heat up the rebar before bending? This could cause the bend area to become very brittle after cooling.
  2. TwinCities

    Adhesive anchor bolts installed underwater....

    You are correct that many "hybrid" adhesives such as Epcon A7, Simpson AT, Hilti HY 150, etc. do not perform well in underwater conditions. This is due to a couple of issues, these type of adhesives generally do not bond well to smooth core drilled holes and also are specifically not recomended...
  3. TwinCities

    Pull-Out Rating for Concrete Achor Bolts

    ACI 318-05 addresses this question in section D.5.3 for a J-bolt. The pullout strength of a single anchor is in section D.5.3.1 with the formula for a j-bolt in section D.5.3.5. You will see that the pullout strength for a J-bolt is much less than a headed bolt (D.5.3.4)
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