506 E VIEW RIDGE DR 2018-01-02 MF Import

�. � I i � � ♦ Y �� . I � � �y � Q� H � �� ( H X1 � �tl�i� � i ywH � xgt � (� � I�i H� 4 � � �� H I sy JN 91322 t"H y Kelvin and Patti Barton page 5 ' �tn H october 22, 1991 � � o �� ��y c� ABS-O -N GRADE � The building floors maY be c o n s t r u c t e d a s s l a h s-o n-grade atop the sand soils followin� removal of the surf;.ce soils . The I subgrade soils must be in a firm, noncoft� areasc�encountered the time of slab construction. Any should be excavated and replaced with select imported st:uctural Pill • q� � slabs-on-grade should be underlain by a capillary break layer consisting of a minimum four (4) inch thickness of free- ' drainin� granuler structural fill with a gradation simiiar to that d� scussed later in PERMANENT FOUNDATIOh AND RETAI.�LLN� j WpLLS . In areas where the passage of moisture throuar. the . sl�b is undesirable, a vapor barrier such as a 6-mii piastic ` ' "�� mem�rane should be placed beneath the slab. ��, �. j I ` T FOUNDATION AND RET$�,NING WALLS 1 EES!lA.,� � ��.. Retaining walls backfilled o� ��e side only should be designed �� to resist lateral earth pressures imposed by the soils � reteined by these structures . The follow� ng recommended � design parameters are for walls less than twelve (12) feet in I '� height which restrain level beckfill : �„�I Design paramet Value �� Active Earth Pressure" 35 pcf Passive Earth Pressura 350� �cf Coefficient of Friction 120 pcf Soi 1 U�:i t V,eight �� Where: � ) pcf is pounds per cubic foot I � 2) Active and passive earth pressures are � M � � computed using equivalent the fluid l " densities . " For restrained v�alls which cannot deflect et least U .002 times the wall hcight, a uniform lateral pressure of c^e hundred (100) psf should be added to the active equivalent fluid pressure. GEOTECH CONSULTAkTS , INC.