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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 Addressss : Q (/�t? iY1Dpls� r Job ZCD 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