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Geotechnical Report <br /> Proposed Development: 11229 - 19th Avenue SE, Everett, WA <br /> September 16, 2016 <br /> P:oe D <br /> I 2ro 8" JJ <br /> i <br /> Yew Ste&Pqe <br /> .0••to tft t 4'le 2'wide Xtrong.Steel Ring <br /> vd"firer weeded to p+pe sleeve <br /> Onven Steep Pipe jar71 or <br /> Beveled End to aid insar1tor <br /> The quality of a pin pile foundation is dependent, in part, on the experience and professionalism <br /> of the installation company. We recommend that a company with experienced personnel be <br /> selected to install the piles. <br /> Lateral Forces-The capacity of pin pipes to resist lateral loads is very limited and should not be <br /> used in design. Therefore, lateral forces from wind or seismic loading should be resisted by the <br /> passive earth pressures acting against the pile caps and below-grade walls or from battered piles <br /> (batter no steeper than 3(H):12(V)). Friction at the base of pile-supported concrete grade beam <br /> should be ignored in the design calculations. Passive resistance values may be determined using <br /> an equivalent fluid weight of 250 pounds per cubic foot(pcf). These values include a safety factor <br /> of about 1.5 assuming that properly compacted granular fill will be placed adjacent to and <br /> surrounding the pile caps and grade beams. <br /> Grade Beam/Pile Cap Embedment- We recommend that the grade beams and pile caps located <br /> around the perimeter of the structure be embedded such that the bottom of the grade beam is at <br /> least 16 inches below the adjacent ground surface. <br /> Estimated Pile Length —The subsurface conditions at the site will likely vary substantially across <br /> the site. Based on the soil conditions at the site and our experience in the project area, for planning <br /> and cost estimating purposes, we estimate that pile length may be about 15 feet. <br /> Pile Installation Monitoring: The quality of a pipe pile foundation is dependent, in part, on the <br /> experience and professionalism of the installation company. We recommend that a company with <br /> personnel experienced in the successful installation of pipe piles be selected to install the piles. <br /> 16-210 11229 19th Ave SE Rpt Page 9 PanGEO, Inc. <br />