×
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

650

650

(OP)
It is determined that a storage tank designed per API 650 requires anchors.

Looking at Appendix B of 650, We can use concrete ring wall or concrete slab.

My civil engineer wants to save cost of concrete. He is proposing that we should simply use earth anchors made by Manta Ray (http://www.earthanchor.com/mantadraw.html). This will be much cheaper.

Is this acceptable ? Are there any pros and cons ?

Is it required that we must use a ring wall foundation if a tank requires anchors.

Thanks for your anticipated reply.
 

RE: 650

JSPCGY-

You have experience with insufficient foundations: thread1452-260793: 650 Tank

Do you really want to not use any foundation to save a few bucks worth of rock and cement?

Are you working directly for the owner/user (and will have to suffer the problems of this tank for years) or are you with an E&C firm (and will walk away from the problem at the end of the project)?

Is this an MBA driven issue?

jt

RE: 650

What are your anchor loads?  Soil conditions?  Model of anchor?

RE: 650

Take a close look at the wording in API and see if they actually specify that an anchored tank must be on a concrete foundation.  If so, then your response is, "It can be built that way, but will no longer meet API-650", which will likely not be acceptable.

My concern with the installation would be that after several years of service, the tank would have settled several inches, leaving lots of slack in the anchor bolts.  A dynamic hammering of the anchor bolts under wind or seismic loading is not the condition designed for.

RE: 650

If you require anchors then I would assume the edge is lifting and creating high bearing on the other edge. This would suggest that a concrete ring beam would be required.
Can all the design assumptions of API650 be met without a concrete ring wall?  

RE: 650

JSPCGY-


When you contacted the "Manta Ray" anchor bolt people, did they state that anyone else has used thier products to anchor tanks ?

Or will you be the first to use the anchors in this way ?

Do you really want to be the first ?

-MJC

   

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