Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Re: Equipment Anchorage

[Subject Prev][Subject Next][Thread Prev][Thread Next]
Are you looking for footnote a to Table 13.5-1 of ASCE 7-05?  I do recall
what you are referring to, but I can't locate it at the moment.  I think I
saw it recently in some seminar notes.

On Tue, Nov 26, 2013 at 2:15 PM, <lrhauer(--nospam--at)> wrote:

> I am designing the support of some roof top mounted mechanical equipment,
> (on an existing roof), that is supported by vibration isolators and,
> therefore, I have to amplify the seismic horizontal forces by 2.5, (Table
> 13.6-1 of the ASCE 7-05). These amplified forces would be used for the
> equipment anchorage to the platform and the platform to the roof framing.
> But, I somehow remember that in checking the existing roof framing the Ap
> can be reduced down to 1.0 from 2.5- it is only the connections that need
> to have the Ap of 2.5 used. But, I can’t seem to find this exception
> anywhere in the ASCE, (or ’10 CBC).
> Can anyone help?
> Thanks in advance,
> Larry Hauer, S.E.

David Topete, SE

Post your message to the list by sending it to: 

The email messages sent to the list will be saved in an archive on the World Wide Web.
These archives are located at:

To contact the list owner, send your message to:

Sponsored By: Pacific Structural & Forensic Engineers Group, Inc. (PSFEG)

To unsubscribe, switch to/from digest, get on/off vacation, or change your email address, click here.