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001 Main Street, Suite 305 <br /> STARK Vancouver WA, 98663 <br /> FOUNDATIONS P: 360.566.7343 <br /> November 12, 2019 <br /> Mr. Cory Myron <br /> R&R Foundation Specialists <br /> 7704 176th Street SE <br /> Snohomish, WA 98296 <br /> --- <br /> Re---Special Inspection -5005 Fowler Ave, Everett, Washington <br /> Permit No.: B1908-052 <br /> Dear Cory- <br /> I have performed the special inspection of the installation of the helical piers per ICC ESR-3969 for the above- <br /> referenced project. <br /> Helical Pier Installation: <br /> The helical pier used for installation was a 2 7/8 inch diameter pipe with a 10 inch diameter helix configuration. <br /> The installation was performed by R&R Foundation Solutions certified installers for PierTech Products using a <br /> RS-6 drive head. <br /> The maximum axial load requirement for this project is 24000 lbs ultimate load. The piers were driven to depths <br /> of 12-18 feet with a minimum installation pressure of 1900 psi. This results in an ultimate axial capacity of <br /> 59730.3 lbs, exceeding the required ultimate load per the design documents. <br /> Sum — — r- <br /> Based on my special inspection and structural observation, the helical piers were installed according to the <br /> engineerin• design load requirements and according to ESR-3969. <br /> Please give our office a call if you have any questions or need further assistance. <br /> Ott <br /> R,e�aards. tire,�,��' AF WASy�cFJ,p <br /> Daniel Stark. P.E. , • <br /> Stark Foundations, Inc. <br /> Attachments: Drive Log .� 40643 44i <br /> RS-6 Torque Chart '�4e` RF�iSTER�� c, <br /> sS/ONALC- <br />