×
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

Fabrication of HPS 50W & 70W steel bridges

Fabrication of HPS 50W & 70W steel bridges

Fabrication of HPS 50W & 70W steel bridges

(OP)
Hi All,

AASHTO's "Guide specification for highway bridge fabrication with HPS 70W Steel", 2nd edition, Section 4.02 states the following:

"Only fabricators meeting the requirements of hte AISC Quality Certification Program, Major Steel Bridges (Cbr) with Fracture Critical Endorsment (F), or Engineer-approved equal, may fabricate with HPS 70W steel."

Can someone shed some light the the need for the "Fracture Critical Endorsement" for fabrcation with HPS 70W? I can understand the Cbr requirement, but I'm not quite clear as to why all fabricators are required to hold a fracture critical endorsement.

Also, do these same requirements apply to fabrication with HPS 50W steel?

Thanks,
Tim

RE: Fabrication of HPS 50W & 70W steel bridges

This is a requirement of Section 12 of AWS D1.5, Bridge Welding Code

RE: Fabrication of HPS 50W & 70W steel bridges

[Disclaimer:  I am NOT a member of the committee that wrote the HPS guide.]

My understanding is that the FC endorsement was required as a means of limiting HPS 70W handling to those who have formally demonstrated ability to comply with the FC consumable handling provisions, which are required by the HPS guide (Appendix A, section 3.03.A) for both FC and non-FC work.  See section 1.1 of the main body of the guide.

My personal assessment is that there is no reason to apply this requirement to HPS 50W.  HPS 50W doesn't require any more special handling than regular Gr. 50W, and doesn't have any special reduced preheat provisions like HPS 70W which would require special attention (beyond the usual bridge standards) to the electrode hydrogen level.

Hg

Eng-Tips policies:  FAQ731-376

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