ARCHIVED REPORTS_2019 SOIL MGMT PLAN (JULY-REVISED)

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Murphy Parkway Warehouse December 19, 2016 Job No. 146-618 Page 7 Foundations for trash enclosure walls, signs, landscape retaining walls, and other appurtenant construction should extend a minimum of 12 inches below the building pad or lowest surrounding soil grade, and have a minimum width of 12 inches. Such foundations may be sized for allowable soil bearing pressures of 1500 psf for dead load, 2300 psf for dead plus live load, and 3000 psf for dead plus live plus seismic/wind loads. The weight of foundation concrete below grade may be disregarded in sizing computations. Continuous foundations should be reinforced with at least four No. 4 bars--two each, top and bottom, as a minimum. The actual reinforcement should be determined by the Structural Engineer. Foundation excavations should not be allowed to stand open for extended periods prior to concrete placement and should be clean and free of all loose and/or soft materials when concrete is placed. The bearing materials should be in a firm, moist condition. Some dock foundation excavations may engage clean or saturated sands and experience sloughing and caving; forming may be required. Resistance to lateral forces may be computed using either friction or passive pressure, but not both, except as recommended below. A coefficient of friction of 0.30 may be utilized for design. Passive earth pressure may be considered equivalent to a fluid weighing 250 pounds per cubic foot. A combination of both friction and passive pressure may be utilized provided the larger mode of resistance is reduced by 50 percent. The recommended passive pressure and friction coefficient values have been modified by appropriate factors of safety and may be applied directly in design calculations. SEISMIC DESIGN In design using the lateral force provisions of the 2013 and 2016 California Building Codes, the parameters in Table 1 may be used. TABLE 1 Period (seconds) Mapped Spectral Response Accelerations (g) Site Class Site Coefficients Maximum Considered Earthquake Spectral Response Accelerations (g) Design Spectral Response Accelerations (g) 0.2 SS 1.065 D Fa 1.074 SMS 1.144 SDS 0.762 1 Sl 0.372 Fv 1.655 SMl 0.616 SDl 0.411 LOADING DOCK WALLS Restrained dock walls should be capable of resisting an at-rest soil pressure equivalent to that exerted by a fluid weighing 50 pounds per cubic foot. Wall design also should consider pressures associated with traffic or other adjacent surcharge. Care should be taken to avoid exertion of excessive compaction