×
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

Anchor rods in pedestal, cracked or uncracked concrete?

Anchor rods in pedestal, cracked or uncracked concrete?

Anchor rods in pedestal, cracked or uncracked concrete?

(OP)
When using ACI318 App D for assessing the shear capacity of anchor rods in a pedestal can the concrete be assumed to be uncracked? i.e. ψc,v=1.4 (Clause D.6.2.7)

Clause 7.10.5.6 and R7.10.5.6  seems to suggest that cracking could occur in which case ψc,v=1.0 ?

Can someone give me examples of the reinforcement required for the three cases for cracked concrete given in D.6.2.7 ?

RE: Anchor rods in pedestal, cracked or uncracked concrete?

sdz

Admittedly I am not a frequent user of ACI-318 however for the example that you described I would be inclined to go with the cracked concrete value of ψc,v=1.0. Unless you have a No.4 tie which is preventing the breakout of the anchor in which case increasing the breakout strength of the anchor by 20% (ψc,v=1.2).

I am visualizing your pedestal as a raised concrete plinth supporting a column which is subject to small/moderate shear and pull-out forces.

RE: Anchor rods in pedestal, cracked or uncracked concrete?

(OP)
Asixth, that's my reading too. In my case I would specify a 12mm bar instead of #4 bar. I wonder if 2-#3(10mm) bars would work?

RE: Anchor rods in pedestal, cracked or uncracked concrete?

sdz... 2#3...0.22 in2 and 2-10M 0.32 in2... close?

Dik

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