Laserfiche WebLink
Geotechnical Engineering Investigation Page 17 of 24 <br /> New Residential Subdivision <br /> 2706 Pock Lane <br /> Stockton, CA 95205 <br /> March 30, 2021 CTE Job # 25-1097G <br /> The structural engineer/architect and slab installation contractor should refer to ACI 302 and ACI <br /> 360 for procedures and cautions regarding the use and placement of a vapor barrier. In areas of <br /> exposed concrete, control joints should be saw-cut into the slab after concrete placement in <br /> accordance with ACI Design Manual, Section 302.1R-37 8.3.12 (tooled control joints are not <br /> recommended). To control the width of cracking, continuous slab reinforcement should be <br /> considered in exposed concrete slabs. <br /> 5.5 Lateral Load Resistance <br /> Shallow footings may be designed to resist lateral loads using a coefficient of friction of 0.30(total <br /> frictional resistance equals the coefficient of friction times the dead load). A design passive <br /> resistance value of 250 pounds per square foot per foot of depth (with a maximum value of 1250 <br /> pounds per square foot) may be used. The allowable lateral resistance can be taken as the sum of <br /> the frictional resistance and the passive resistance,provided the passive resistance does not exceed <br /> two-thirds of the total allowable resistance. <br /> 5.6 Retaining Walls <br /> Free draining retaining walls backfilled using generally onsite fill soils per the preceding section <br /> of this report, may be designed using the equivalent fluid weights given in the table below. These <br /> values are also considered suitable for permanent shoring, if proposed. <br /> TABLE 5.6 <br /> EQUIVALENT FLUID UNIT WEIGHTS(pounds per cubic foot) <br /> SLOPE BACKFILL <br /> WALL TYPE LEVEL BACKFILL <br /> 2:1 (HORIZONTAL:VERTICAL) <br /> CANTLEVERED WALL 40 60 <br /> RESTRAINED WALL 60 90 <br /> Traffic surcharges on retaining walls should generally be equal to 1/3 of the vertical load of the traffic <br /> located within ten lateral feet of wall. Lateral pressures on cantilever retaining walls(yielding walls)due to <br /> earthquake motions may be calculated based on work by Seed and Whitman(1970). The total lateral thrust <br />