×
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

Another Minn Bridge with problem gussets

Another Minn Bridge with problem gussets

RE: Another Minn Bridge with problem gussets

Amazing how peoples perception of safety changes after a structural collapse of a major structure.

RE: Another Minn Bridge with problem gussets

The photos [2003 ]of the I35W bridge gussets have been released.A no brainer !!!  www.msnbc.msn.com/id/23769128

RE: Another Minn Bridge with problem gussets

Something isn't clear about the gusset plates where they too thin as designed/built or where they too thin at the time of failure due to additional weight imposed by later modifications.

RE: Another Minn Bridge with problem gussets

The question we need to ask: Was the bending due to some abnormal movement of the bridge or was did it occur during construction?

If you've ever worked with ironworkers things get bent all the time.

RE: Another Minn Bridge with problem gussets

Who can tell for certain if they were too thin or not? Weren't the design documents 'lost'?

Speaking of the design documents, what is the typical requirement for saving and storing design docs after the structure is built? Aviation keeps these things forever because of maintenance requirements. What about non aviation structures?

RE: Another Minn Bridge with problem gussets

I believe there was a report stating that the gussets were underdesigned (based on recalculation).  You don't really need the original documents to determine that.  

RE: Another Minn Bridge with problem gussets

I love how they quote lawyers as if they are expert witnesses.

RE: Another Minn Bridge with problem gussets

I heard this brodge may have been designed bu the same firm that did the I35W bridge.

RE: Another Minn Bridge with problem gussets

In the photo referenced in the post by Robertmet what would the approach to fix it if someone deemed it had to fixed PDQ?

RE: Another Minn Bridge with problem gussets

Unclesyd - bolting stiffener angles is not uncommon to the retrofit of gusset plates.

Prost - I believe the industry standard is 7-10 years for keeping calculations and other documentation.  This bridge and the 35 bridge are well over 40 yrs old.  And as I understand it, the firm was acquired by another larger firm...when that happens there is a typical house cleaning.  Hence I don't think it unusual to expect to find original calculations.

Regards,
Qshake
pipe
Eng-Tips Forums:Real Solutions for Real Problems Really Quick.

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