×
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

embed plates

embed plates

embed plates

(OP)
Does anybody use the Nelson Stud method for designing embeds, i.e., number, size and spacing of studs? The plate thickness is designed
by standard engineering mechanics.

RE: embed plates

What is the Nelson Stud Method?

RE: embed plates

slickdeals beat me to the question.

RE: embed plates

I’m not sure what you are asking…..your title talks about embedded plates but the content of your post discusses embedded studs…..which one are you using to resist pullout?

For studs (at this point) I use Appendix D of ACI 318. (There was a time when I would use the methods in the PCI handbook, but they appear to be unconservative compared to Appendix D in the calculations I have done.)

For embedded plates, as far as the concrete pullout strength goes, I just use the normal two-way/one-way failure planes that ACI 318 gives the strength for.

RE: embed plates

(OP)
I have a publication by TRW Nelson Stud Division that gives data and formulas for embedded stud design. I don't know if it is still available.
I assume everyone knows what a Nelson shear stud is.

RE: embed plates

(OP)
I am using the publication I referred to, to design the attachment of an embedded plate connected to concrete to resist all loads applied to the surface of the plate. The steel studs are welded to the back of the plate and the whole assembly is placed in formwork and concrete is cast around it. When the forms are removed just the steel plate is exposed to receive an attachment(which applies the loads).
My typical situation is a flush mounted plate.

RE: embed plates

Are you referring to the Nelson Manual circa 1977? Depending on your contract requirements, ACI Appendix D is generally followed in this situation.

RE: embed plates

I meant to say ACI 318 Appendix D

RE: embed plates

(OP)
The publication I have is copyrighted 1985 and 1985. I just wondered whether this method is conservative or not.

RE: embed plates

(OP)
Sorry 1985 and 1977.

RE: embed plates


Quote:

The publication I have is copyrighted 1985 and 1985. I just wondered whether this method is conservative or not.

I don’t think it is. I don’t think they did the extensive testing that was performed to develop Appendix D. You look at the various failure modes that Appendix D considers and then consider the fact that some of those older methods don’t even touch them……and you then realize which one you should be using. The bottom line is: You can defend using Appendix D in a court room…..so getting away from that is risky.

RE: embed plates

(OP)
Thanks to all for the input.

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