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Lutzky Associates Development LP - Geotechnical Investigation <br />MACTEC Project 4953-03-2631 <br />September 18.2003 <br />Lateral Load Design Data <br />14-inch-square Driven Pile <br />Pile Head Deflection (inches) <br />M <br />Pile Head Condition Free Fixed Free Fixed <br />Lateral Load (kips) 16 44 30 65 <br />Maximum Moment (kip-ft) 46 142 89 237 <br />Depth to Maximum Moment (ft) 5 0 5 0 <br />Depth to Negligible Moment (ft) 14 16 14 16 <br />The lateral capacity and reduction in the bending moment are based in part on the assumption that <br />any required backfill adjacent to the pile caps and grade beams are properly compacted. As the <br />liquefaction is only expected to occur at depths about 15 to 30 below pile cap, the lateral capacities <br />should not be significantly affected. <br />For piles in groups spaced at least 3 pile diameters on centers, no reduction in the lateral capacities <br />need be considered for the first row of piles and the piles located in the direction perpendicular to <br />loading. For sup,Mque,U,rows in the direction of loading, piles in groups spaced closer than 8 pile <br />diameters on centers will have a reduction in lateral capacity due to group effects. In the direction <br />of loading, the lateral capacity of piles in groups, exieveptiff-rEIMkfiEi*El spaced at 3 pild <br />diameters on centers may be assumed to be reduced by half. The reduction of lateral capacity iin <br />the direction of loading for other pile spacings may be interpolated: 5 - 1 <br />.. <br />1.0% <br />'A coefficient of friction of 0.4 may be used between the sides of the pile caps and the adjacent <br />soils. The passive resistance of the natural soils or properly compacted fill against pile caps and <br />grade beams may be assumed to be equal to the pressure developed by a fluid with a density 2250' <br />tpdziAds per cubic foot. A one-third increase in the quoted passive value may be used for wind or <br />seismic loads. The friction against the side of the pile caps, resistance of the piles, and the passive <br />resistance of the soils against pile caps and grade beams may be combined without reduction in <br />determining the total lateral resistance. <br />18