3311 GRAND AVE 2016-01-01 MF Import

�07tlx > H CA y�3 � H� � N "C V! N x ��d °/� �, g y� Y � zyy� r r� H g �' �d� �� H O fA 1 �• a August 15, 1991 Mr. Bob tdorlinq G-0126 Page 10 �e vapor transmission through the slab. Two to four inches of sand � may be placed over the barrier membrane for protection during concrete placement. Alternatively, six (6) inches of clean crushed rock with no particles greater than one (1) inch in size may be a used in lieu of the layered system described above. , Oaraa� Walls The garage walls should be designed to support the cut banks. Conventional reinforced concrete retaining walls can be used. Alternatively, a shoring wall consisting of soldier piles with a permanent concrete facing may be considered for the west wall to provide temporary support for additional cut into the hillside and to function as a permanent wall. Conventional Rsinforaed Concreta 11a11 " The additional excavation for the west wall can be minimized by �� usinq an L-shaped wall with the bottom slab turned to the garaqe side and the wall poured against the cut bank. Counterforts may be used for additional support. Drainage behind the wall should be provided in accordance with the requirements under the Groundwater ' Drainaae section. The north and south walls, with level or near-level ground behind �� them, should be designed for an active lateral soil pressure of 30 pcf equivalent fluid pressure (EFP). The west wall, with the qround behind slopiny up at approximately a 2.25H:iV gradient and t* the existing house at about 14 feet away, should be designed for an active lateral soil pressure of 65 pcf EFP. Passive lateral soil pressure and friction between footing (or base slab) and subgrade �� �� Geo Conaultants Inc. I'