×
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

Designing with Grade 2 or Grade 5 Bolts

Designing with Grade 2 or Grade 5 Bolts

Designing with Grade 2 or Grade 5 Bolts

(OP)
Can the principles of bolt design in the AISC Manual be applied to Grade 2 and Grade 5 Bolts?  

The 13th Edition specifically mentions A307, A325, A449, A490 and F1852 bolts, but nothing about other grades.

Are there specifications or design guides for Grade 2 and Grade 5 Bolts?

Thanks.

RE: Designing with Grade 2 or Grade 5 Bolts

Grade 5 bolts have the same yield and tensile stresses as A325 bolts.  So you could use the A325 allowables when designing with Grade 5 bolts.

I believe (but I'm not certain) that the strength of Grade 2 bolts is similarly equal to those for A307 bolts.  There is a difference in that the A307 does not have a specified yield stress, only a specified tensile stress, while the Grade 2 bolt has both.

RE: Designing with Grade 2 or Grade 5 Bolts

Some more information from a reference I have.

Grade 2 may be used as an alternate for ASTM A307 Grade A.

Grade 5 will also meet other specifications such as ASTM A449.

Grade 8 will also meet ASTM specification A354 Grade BD.

All of these are listed in the 13th edition manual.

RE: Designing with Grade 2 or Grade 5 Bolts

When you say grade 8, are you speaking of 8MPa, etc?  I thought grade 8 is equal to A325 and Grade 5 is A307, but perhaps my terminology is off.

RE: Designing with Grade 2 or Grade 5 Bolts

From AISC's A Guide to Engineering and Quality Criteria: Common Questions Answered,

"6.2.5. Is it acceptable to substitute SAE J429 grades 5 and 8 bolts for ASTM A325 and A490 bolts, respectively?

No. The strength properties of SAE J429 grade 5 bolts and ASTM A325 bolts are identical; likewise, SAE J429 grade 8 bolts are the strength equivalent of ASTM A490 bolts. These material specifications differ, however, in that ASTM A325 and A490 specify thread length and head size, whereas SAE J429 does not. Additionally, quality assurance and inspection requirements for ASTM A325 and A490 bolts are more stringent."

I know if I ever saw a grade 2, 5, 8, f911 bolt on a project I would flip out.
 

RE: Designing with Grade 2 or Grade 5 Bolts

(OP)
Thanks nutte.  What is the reference you have?


Sandman:

Is the "Guide to Engineering and Quality Criteria" on the AISC web site?  Do you know the link?

Thanks

RE: Designing with Grade 2 or Grade 5 Bolts

It's of the "photocopy of a fax of a photocopy from almost 20 years ago" variety.  I'm not sure the original source.

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