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


Fatigue of bolts in tension

Fatigue of bolts in tension

Fatigue of bolts in tension

AS4100-1998 shows for a bolt in tension detail category = 36.
BS EN 1993-1-9 : 2005 shows the detail category = 50
In most other cases both codes show the same detail category.
Since Eurocode is more recent I would expect that value to be more accurate. Does anyone have any references that support that conclusion, or otherwise?

RE: Fatigue of bolts in tension

For comparison in NZS3404:1997 it was 36 (1997 version of the NZS3404 standard is virtually identical to AS4100 apart from additional seismic requirements), in the NZS3404.1:2009 replacement of the fatigue section they removed the bolts from the fatigue section altogether but I was never sure why. Could be due to the difference of opinion you have noted?

They also had this warning in the 1997 version which maybe why they removed it?

RE: Fatigue of bolts in tension

Thanks Agent666. I know that it need not be considered for /T bolts but in telecommunications where I'm working we often have snug tight bolts of a variety of grades, from 4.6 to 8.8.

RE: Fatigue of bolts in tension

Just base it on 36, fatigue isn't something that you want to get wrong. The next size up of holding down bolts won't break the bank.

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