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Everett Duplex Foundation Repair/20188 June 22, 2020 <br /> Comment Response Page 3 of 3 <br /> Vertical reinforcement is not required. Refer to justification on p. 7 of the structural <br /> calculations. <br /> 10. Detail 1/S-1.0 shows the pile extending to the top of the foundation element,potentially resulting <br /> in transfer of loading through friction instead of bearing. Calculations substantiating the transfer <br /> capacity should be submitted for review. Alternatively, the design should be revised to ensure <br /> adequate depth of reinforced concrete above the piles to provide end bearing. See IBC Sections <br /> 1604.1 and 1604.4. <br /> Per ACI 318-14 Section 20.6.1,adequate concrete cover has been specified in the plans to ensure <br /> adequate depth of reinforced concrete above the piles to provide end bearing. <br /> 11. The pile retrofit per Detail 1/S-1.0 is located eccentrically from the supported load above. This <br /> will induce moments into the piles concurrently with the axial loads. Calculations substantiating <br /> the pile design for combined axial and flexural loading should be submitted for review. See IBC <br /> Section 1604.1 and 1604.4. <br /> Pile analysis with eccentric loads has been included in the structural calculations pp.4-6. <br /> 12. The pile retrofit in Detail 1/S-1.0 indicates rebar dowels between the existing foundations and <br /> new grade beams. The size, number,and spacing should be specified. See IBC Section 1901.5(3). <br /> New dowling into the existing foundations has been included in detail 4/S3.1. <br /> If you have any questions or comments regarding the responses to this review, please do not hesitate to <br /> call. <br /> Sincerely, <br /> CG Engineering <br /> 914/4, 0,1elf&_ <br /> Mike Maechler, PE,SE <br /> Project Manager <br /> 250 4th Avenue South,Suite 200 <br /> Edmonds,WA 98020 <br /> CG_ ph.425 778.8500 I f.425.778.5536 O <br /> ENGINEERING www.cgengineering.com <br />