×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Portal framed shed - bracing bolts becoming loose

Portal framed shed - bracing bolts becoming loose

Portal framed shed - bracing bolts becoming loose

(OP)
Writing this to poll anybody's experience of the bolts at the wind bracing connections (both vertical bracing and plan /roof bracing) becoming loose.

I have a client that owns a number of portal framed "shed" type buildings used for retail purposes. Three of these buildings (in different States and built by different builders) have had bolts from the diagonal bracing connections come loose and fall out. On one of the buildings this has happened twice in different areas of the building. On the same building after replacing the first bolt that had become loose and fallen out I personally checked about 100 bolts in bracing connections (while I had a scissor lift and free access to the property) and found about a third were probably best described as finger tight.

Other than these three buildings I have never come across this before (I have inspected a lot of structures of this type) and have never read about it or heard colleagues raise similar issues.

Has anybody else have first or even second hand experience of this ?

RE: Portal framed shed - bracing bolts becoming loose

The bolts should have been designed and installed as slip critical. To fix the problem, you can either prepare the faying surfaces and install the bolts as slip critical or weld the connections.

Unfortunately, it is not uncommon for these type of connections to be incorrectly designed and/or installed. I have found this issue to be more prevalent in small, prefabricated or "cookie cutter" type of buildings rather than larger, multi story structures.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources