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!

*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

UFC 3-310-04 Acceleration

UFC 3-310-04 Acceleration

UFC 3-310-04 Acceleration

I'm designing a slab on grade pad for an outside HVAC chiller. This is a DoD project, so it requires the use of UFC 3-310-04, Chapter 4 for an MC-1 component. Equation 4-4 requires the use of a[sub]ip (component spectral acceleration). Would you use S[sub]DS from ASCE 7-05 for a[sub]ip?

RE: UFC 3-310-04 Acceleration

If you use SDS with Ip=1.5 you should good since you would be at the flat part of the spectrum. But you also should check the magnification factor depending on the equipment-foundation frequency ratio (less than 0.7 and more than 1.3 is acceptable).

RE: UFC 3-310-04 Acceleration

I believe, the short period acceleration, Sds that is included in UFC should match with that in ASCE 7. Therefore, you should be fine if you use Sds from ASCE. Component Importance factor (Ip) can also be taken from ASCE.

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! Already a Member? Login


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close