×
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

RCSC Specification Vs AISC

RCSC Specification Vs AISC

RCSC Specification Vs AISC

(OP)
In working through some practice problems for the SE exam, I came across a difference in how to calculate the available tensile capacity of a bolt subjects to shear and tension. RSCS would be per equation 5.2 and rearranging to solve for Max tensions allowed would yield Tu < Phi*Rnt*SQRT(1-(Vu/(Phi*Rnv))^2)

This is different than in AISC spec page 16.1-109 where F'nt = 1.3Fnt-Fnt*fv/(phi*Fnv) <= Fnt.

Are both equations ok to use even though they yield quite different results? I am seeing a difference of around 20% for a 1" Dia A325N bolt with about 22.5k of shear.

RE: RCSC Specification Vs AISC

AISC 360-05 commentary for J3.7 provides an explanation. It says: "generally, use of the elliptical relationship is acceptable" Figure C-J3.1 graphs the solution to both equations and shows the difference.

RE: RCSC Specification Vs AISC

The next edition of the RCSC Specification will be using the identical formulas to AISC.

RE: RCSC Specification Vs AISC

In cases such as this, it is best to use the AISC Specification equation since the AISC Specification is the document legally adopted by the building code (by IBC 2012, for example). The RCSC Specification is not part of the building code but, rather, provides much of the basis for the bolt-related provisions in Chapter J of the AISC Specification.

RE: RCSC Specification Vs AISC

(OP)
Thanks for the help guys.

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