×
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

Dynamic Equipment Anchorage - ACI 351.3

Dynamic Equipment Anchorage - ACI 351.3

Dynamic Equipment Anchorage - ACI 351.3

(OP)
I need to design a stand and anchorage for a centifuge in an animal rendering facility. I observed an existing installation, and there was a lot of lateral movement, but the stand was not well braced. Centifuge total weight is 4,600lbs of which 1,000lbs is rotating at 115rpm. The centrifuge will be mounted on a stainless steel frame (300lbs) which will be anchored to an existing 12" concrete slab-on-grade. The rotating center-of-mass is 60" above the anchorage. Rotating cycles is in the range of 8 million/year. I'm using ACI 351.3 to determine design force as the manufacturer hasn't provided an unbalanced design load. Equation 3-7 gives an unbalanced force of 19.2lbs which seems real low. My question is has anyone else used this reference to design a similar installation, or know of other references/values to use to determine a horizontal design load? I'm considering using a horizontal force based on overturning moment (2,500lbs), but that seems overly excessive. Secondary question, is the use of epoxy post installed anchors with a grouted base plate resonable? Thanks,

RE: Dynamic Equipment Anchorage - ACI 351.3

I haven’t used that reference for that particular purpose…..but using my own sources, I actually came out with less unbalanced force (i.e. about 12 lbs; and that is with an assumed eccentricity of 0.032”). So looks like you are probably in the ballpark.

As far as your second question goes: I’m not sure I have used post-installed anchors for this purpose…..but I seem to remember Hilti offering some guidelines in that regard. Typically I have used Rowan anchor bolts for dynamic loads (but that has typically been for more heavy duty stuff like compressors).

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