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I believe you worked with our group on standard drawing
|Date||January 6, 2016|
|Attachment||twin steel tube.jpg|
This issue has come up in the past regarding the use of the washers underneath the end shoe and nested thrie beam attachment. We have been recommending that washers be used based on the size and length of the slots in the current thrie beam end shoe pieces. We have some concerns that the size of the slots in the end shoe might allow the nuts to pull through. TTI has been using washers as well based on similar concerns. I believe that they have been using rectangular washers, but I do not have the spec.
In our recent tests, we have been using 5/8” F844 washers on the backside of the end shoe. That has worked fine to date. These are more standard parts and are easier to obtain.
|Date||January 7, 2016|
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