>
> Joe:
>
>
>
> You may want to consider using headed studs rather than J-bolts due to
> the eccentricities during tension loading that the j-bolts set up. I
> believe SEAOC has published research illustrating this concern. Our
> office no longer uses J-bolts for this reason.
>
>
>
> Respectfully:
>
>
>
> Bob Freeman AIA, EIT
>
> IDS Group, Inc.
>
Also, there have been cases where J bolts have been worked free by
repeated bending of the columns without fracturing the concrete. I
think ACI 318 Appendix D also downgrades the allowable tension in a J
bolt compared to a headed stud or washer and nut on a threaded rod.
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