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Apparently you are using the 2000 IBC. I believe that the 2003 IBC is a bit more clearly organized and written. IBC 2003, Section 1808.2.23, is the section that currently covers your application. 1. I think that your friend is confusing stability IBC 2003, Section 1808.2.5 with the SEISMIC requirements contained IBC 2003 Section 1808.2.23. Your friend is wrong, if indeed you are in a Category C seismic application. 2. I am not sure I understand this portion of the inquiry. IBC 2003 Section 1808. was rewritten in the 2003 vs. the IBC 2000. Your answers may lie in the rewritten version.

If you need some real definition call Geomatrix in Oakland and ask for Maury Power. He was the author of most of this section.


From: "Will H" <haynewp(--nospam--at)>
Reply-To: <seaint(--nospam--at)>
To: seaint(--nospam--at)
Date: Fri, 18 Jun 2004 08:58:59 -0400

According to this provision in IBC, "Individual pile caps, piers or piles shall be interconnected by ties".

1) I interpret this to mean basically that all pile caps must be connected no matter how many piles per pile cap. I have a friend who thinks this means only pile caps that have (1) pile are required to be tied to other caps to achieve lateral stability. And if there are (2) piles in a cap, this means the pile cap only needs to be tied in one direction and not both. Am I correct?

2) When tieing all these caps together, what is the usual approach in handling the force from the lateral resisting elements? For example, I tie a typical column supporting pile cap to the pile cap of my large shear wall, this grade beam will also be receiving a large load from the shear wall cap.

I am new to deep foundations, thank you for any advice


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