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!

*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.

Jobs

Excavator on Bridge Deck for demo after Longitudinal Saw-cuts

Excavator on Bridge Deck for demo after Longitudinal Saw-cuts

(OP)
Hello,

Today I got out on site to observe some bridge demolition procedures. It is a four span adjacent box beam bridge and we saw-cut longitudinally between each beam to cut the shear keys. Our demolition plan called for the crane to lift the beams from their bearings after the dowels were core-drilled. The site crew had a 70,000 lb excavator on the deck and was using that to lift one end of the beam free from the dowels. This took a considerable amount of effort and banging from the excavator and the entire deck was deflecting approximately 3"-6". Does AASHTO (or any other code) prohibit equipment from being on the deck after it has been cut longitudinally? I'm concerned for the safety of the workers but they say they do this all the time.

Thanks

RE: Excavator on Bridge Deck for demo after Longitudinal Saw-cuts

They do it all the time until they fracture the boxes. AASHTO does not have any prohibitions in this regard. Your analysis has to reflect how the contractor will do the work, or rather, the contractor has to do things as stipulated in your demo procedure. Is he following the approved procedure?

What do the DOT specs call for? On NYSDOT projects contractors have to submit detailed demo plans and calculations. The specs cite various provisions of OSHA and other codes.

Back to your case, if the contractor cut the keys the live load distribution is no longer following the AASHTO provisions.

RE: Excavator on Bridge Deck for demo after Longitudinal Saw-cuts

(OP)
The contractor is not following our approved demolition procedures. The problem is that this is a township road so there are no DOT inspectors present. After I expressed my concerns to the site crew, I also informed upper management of the risks.

RE: Excavator on Bridge Deck for demo after Longitudinal Saw-cuts

That's all you can do. CYA

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


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close