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Re: Spacing for 36" dia. hollow steel pile

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API RP 2A section 6.9.1 says "Generally, for pile spacing less than eight (8) diameters, group effects may have to be evaluated.". This code is applicable for offshore platforms. I do not know whether this code is applicable to your application.

On 12/09/2007, Micayas, Julius <jmicayas(--nospam--at)> wrote:



I am using 36" diameter hollow steel piles for my off-shore application; my pile cap requires

A total of 18 piles (i.e. 6 each row) going with the rule of thumb 3 x pile diameter, I ended up 9' center

which will give me  a wider width.


Is there a code that specifies the min. spacing of piles?




Engr. Julius Micayas

P.E. license no.32969

Senior Lead Structural Engineer


Phone - 504-841-3014 (direct)

504 837-5275 (office)

Fax - 504-837-2986


E-mail:            jmicayas(--nospam--at)