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


Units in AAR M-1001 Fatigue REPOS

Units in AAR M-1001 Fatigue REPOS

Units in AAR M-1001 Fatigue REPOS

To anyone out there (DH?):

In the AAR Manual of Standards and Recommended Practices, Section C Part 2, chapter 7 contains Road Environment Percent Occurrence Spectra (REPOS) for various forces on various freight car types.

In the case of "Twist Moment" REPOS (i.e. Table 7.25), what are the units, because I can't find them anywhere.

Are they kip-ft, kip-in, lb-ft, lb-in? And why does the table heading say maximum LOAD, minimum LOAD? Are these forces or moments?


RE: Units in AAR M-1001 Fatigue REPOS

OK - found the answer to my own post...

If anyone else is wondering, the units are indeed kip-ft, as shown in the 1998 Manual's histograms, e.g. page C-II-209, and they really are Moments.


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!


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