HomeMy WebLinkAbout609 DUKE LN - SPECIAL INSPECTIONS - 7/27/2017T
July 27, 2017 3
Olshan Foundation Solutions 178UG 17 I t :
1655 W. Girard Ave.
Englewood, CO 80110
Olshan Job#: 2014643
Subject: Review of Foundation Repairs at 609 Duke Lane, Fort Collins, CO 80525
As requested by Olshan Foundation Solutions, we have reviewed the repair proposal and installation from Olshan
Foundation Solutions regarding the repairs made to the above referenced residence. Olshan Foundation Solutions
presented the repaired portion of the foundation using 7 exterior segmental pre -cast concrete and steel pipe Cable
Lock TM piles beneath the above referenced location for our review a portion of the piling installation. The pile
location and spacing as represented were found to be in general compliance with industry standards, and generally in
:accordance with Olshan Foundation Solutions' proposal based on the field data provided to us by Olshan
Foundation Solutions.
In our opinion, the piling depths in conjunction with the pile driving force as reported by Olshan Foundation
Solutions are generally appropriate for this type of structure and for the area where the work is being performed. The
repair work performed to the subject location has been acceptably completed, based on the information provided by
Olshan Foundation Solutions, in accordance with good industry practice for foundation repair work using pre -cast
segmental piles. The repairs performed on the subject location should be expected to minimize the foundation
settlement observed prior to the foundation repair work. In instances where partial repairs are performed, meaning
the entire foundation has not been underpinned, potential differential movement may occur. It should be noted that
partial repairs modify the design of the foundation and while partial repairs are generally accepted industry practice
the possibility of future movement should be recognized. Non -supported areas are not covered for downward •.
foundation movements by the contractor's warranty.
The future performance of the foundation system on the subject location should function as generally intended,
provided proper soil moisture is maintained and there is not a loss in the load bearing capacity of the soil beneath the
foundation. Soils should be graded such that there is positive drainage away from the -foundation or a drainage
system can be installed to prevent water from ponding around the foundation. A foundation maintenance program is
recommended which can be found at www.fouhdationperformarice.org.
We appreciate being of service. If, you have any questions or require additional information please contact the
undersigned.
Regards, J`'`,;no U y,�AO&
_ !C e
Ronald C. Roche, P.E.
204 World of Tennis Square, Lakeway, Texas 78738
Ph:713-775-4715
Jul 261702:17p p•2
Piling Depth S Pressure Tracking Sheet
Refer to Zip Code Data to detennine # of steel segments for Heaviest & Lightest Test Holes Date12
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supervisor
Length of Notes: Starter Cabie in Feet•
41L Lightest (L) hole from CAD
BHD , Depth of Hole to Grad. Base
TD Total Depth to ground level Minus BHD
PIPT Post Install Pressure Test Minus r..Q 3 3