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Approval for Revisions to AC358 Gets Deferred

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by Bill Bonekemper

October 13, 2011

Too Many Unresolved Issues Between Ad Hoc Committee of Helical Pile Manufacturers and ICC-ES Staff to Reconcile by ICC-ES Deadline


For those of us tracking the progress of the revisions for AC358 (ICC-ES Acceptance Criteria for Helical Foundations), the hand writing was on the wall well in advance of the public meeting held Tuesday, October 11th in Birmingham, AL.  The hand writing per say is represented by the aggregate of some 24 unresolved items between the Ad Hoc Committee of Helical Pile Manufacturers and the ICC-ES staff engineers.  The ICC-ES staff first responded to the Ad Hoc Committee’s requested changes to AC358 on August 30, and since that time members of the committee submitted responses and change requests until September 21.  The ICC-ES staff engineers posted their final response on October 7 – four days prior to the public meeting date. (see response here)


The Ad Hoc Committee of Helical Pile Manufacturers was formed in April this year, and the committee contracted the services of CTL/Thompson, Fort Collins, CO, to assist with the development of desired revisions to AC358, which was originally approved by ICC-ES in June of 2007 and became effective in July of the same year.  One of HPW’s Technical Advisors and CTL/Thompson’s IAS Laboratory Technical Manager, Moncef Souissi, represented the Ad Hoc Committee as its chair person at the ICC public meeting in Birmingham on Tuesday, October 11.  When the ICC chair person asked for comments on AC358 revisions from those in attendance, Mr. Souissi took the podium and immediately asked the ICC committee to suspend the current requests for changes and to grant an extension of time for additional discussion and development.  Mr. Souissi cited but a few of the approximate 24 open items as examples of some of the more complex issues that will require more time in order to gain consensus from the Ad Hoc Committee and ICC-ES engineers.


Mr. Souissi’s suggestion was supported by the senior structural engineer for ICC-ES, Brian Gerber, and he recommended to the committee that the revisions for AC358 be deferred to allow adequate time for review, discussion and to achieve consensus from both parties.


What all this means in terms of time, effort and immediate impact for our industry is significant – and not at all in a positive way with respect to time and moving the industry forward.  The ICC-ES certification process itself is measured in three to six month increments with staff reviews and public comments realistically taking 1-2 months, and their public meetings are scheduled once a quarter.  The next scheduled ICC public meeting is scheduled for February 7-9 in Los Angeles.  All this translates into a very demanding timetable for the Ad Hoc Committee members who must hash out their differences with ICC-ES engineers and reach consensus in time to meet all of the deadlines leading up to February meeting.  So, if everything progresses perfectly and all deadlines are met, the earliest a revised AC358 could be accepted is four months from now.


So, while engineers and building officials are stuck with AC358 in its current form without conformance with IBC 2009 or 2012, helical pile contractors and manufacturers will miss out on an unknown number of opportunities to bid deep foundation projects for new construction or remedial applications where conformance with current IBC code is required.  In economic times like we have now, every possible competitive advantage becomes extremely important, and unfortunately this very important advantage remains elusive and unavailable to our industry manufacturers and installation contractors.  We encourage the Ad Hoc Committee and the ICC-ES staff engineers to rise to the occasion for the good of the entire industry and bring this process to a successful conclusion in February.  Far too much for far too many is at risk with for our industry’s growth and prosperity hanging in the balance.