223 PECKS DR 2016-01-01 MF Import

. � � Footings should be deepened as required to penecrate the fill and extend at least 12 inches into the undisturbed natural bearing soils. As an alternative to deep foetings where fill soils are thick, foundation loads may be transferred from the recommended minimum foundation depths to the undisturbed natural soils by a monolith of lean mix concrete having a minimum compressive strengh of 1000 psi. The width of the lean concrete monolith should be at least as wide as the footing or at least one-half of the monolith height, whichever is greater. To provide a level bearing surface, the . earing surface should be stepped in areas where the native so�ls surface slopes. An average step ratio no greater than 1.5:1 (horizontal:vertical) should be used. ; ! Settlement of spread footing foundations is expected to be ' within tolerable limits for this structure. Settlement of I continuous wall footings carrying loads up to 1 klf are expected ' to be 1/4 inch or less. Maximum differential foundation � settlement within the proposed structure is expected to be on ° the order of 1/4 inch. Settlements are expected to occur � primarily during construction. For lateral design, resistance to lateral loads can be assumed to be provided by friction acting at the base of foundations and by passive earth pressure. A coefficient of friction of 0 .35 may be assumed with the dead load forces in contact with onsite native bearing soils . An allowable static passive earth pressure of 200 psf per foot of depth may be used for the sides of footings poured against undisturbed natural soils or properly compacted structual fill. The bearing values indicated above are for the total dead load plus frequently applied live loads. If normal code requirements are applied for design, the vertical bearing values may be increased by 50� £or short durations of loading which will include the effects of wind or seismic forces . Allowable lateral passive pressures may be increased by 33� for wind and seismic forces.