×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

*
*
*
*

Thanks. We have received your request and will respond promptly.

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.

Students Click Here

Allowable Bearing at bolt holes

thread723-124249

Allowable Bearing at bolt holes

Allowable Bearing at bolt holes

(OP)
Hi guys,
Please , somebody coluld explain me why AISC-ASD Eq.( J3-1)
allows a bearing strength Fp= 1.2*Fu?
I understand that the maximum  strenght the steel can reach  is Fu, the rupture strength, then how I can allow 1.2 Fu?.
Thanks in advance

jatfuentes

RE: Allowable Bearing at bolt holes

Fu is the maximum TENSILE strength.  Higher strength is applicable to bearing.

RE: Allowable Bearing at bolt holes

Higher strengths for bearing are based on bolt hole deformation and limiting such deformation.  Depending on whether you want to limit deformation at the hole or not you may use J3-1 or J3-4 for ASD, or J3-2a, 2b or 2c for LRFD.  These limits keep the hole from elongating too much (>0.25") and also keep the hole from splitting parallel to load due to the bearing prior to a transverse fracture on the net section.

Check out the commentary for J3 in the 3rd LRFD ed. or the 9th ASD ed.

RE: Allowable Bearing at bolt holes

(OP)
Thanks for the reply,
Really, Fu is the rupture in a tension test, and the bearing strength is not the case.

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! Already a Member? Login

Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now
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