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: 1 <br /> lee <br /> 1001 Main Street, Suite 305 <br /> STARK Vancouver WA, 98663 <br /> FOUNDATIONS P: 360.566.7343 <br /> August 8, 2019 <br /> Mr. Cory Myron <br /> R&R Foundation S.- ' s <br /> 7704 176 .i.--e <br /> S.. .mis , WA 98296 µ <br /> — <br /> Re: Special Inspection -4909 Elm Street, Everett, Washington <br /> - .il/.I <br /> Permit No.: B1906-026 <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 20000 lbs ultimate load. The piers were driven to <br /> depths of 11 -22 feet with a minimum installation pressure of 2200 psi. This results in an ultimate axial <br /> capacity of 69161.4 lbs, exceeding the required ultimate load per the design documents. <br /> Summary: <br /> Based on my special inspection and structural observation,the helical piers were installed according to the <br /> engineering 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 /> oaL ,g� WF" , Wy <br /> s � �Q , <br /> '�Reaards.n z <br /> Daniel Stark. P.E. ='�l �". <br /> Stark Foundations, Inc. 40643 <br /> °#� '4.0/STERt° �`' <br /> Attachments: Drive Log Sis <br /> SiONAL�� <br /> RS-6 Torque Chart <br /> (//3 <br />