Laserfiche WebLink
St. Barbara Catholic School <br />Project No.: D-6289-01 <br />• Concrete should have a minimum compression strength of <br />maximum water/cement ratio of 0.45. Type V Cement shoulc <br />concrete at the grade. <br />CITY OF SANTA ANA <br />Planning and Building Agency <br />may, lS. <br />Approved <br />FOR PERMIT ISSUANCE <br />• Additional recommendations regarding water or vapor transmission should be <br />provided by the architect/structural engineer/slab or foundation designer. <br />Passive pressure <br />Horizontal forces may be resisted by the combined effect of sliding resistance of 0.4 <br />times the dead load and a passive pressure of 300 pounds per square foot per foot of <br />embedment at the natural soil to a maximum of 4,500 pounds per square foot. <br />The allowable bearing capacity and the allowable resistance of horizontal forces may be <br />increased by one third for earthquakes and other temporary forces. In case combining the <br />lateral resistance with the friction force, the friction component shall be reduced by 1/3. <br />Active pressure <br />Recommended active lateral soil pressure values for design of drained retaining walls are <br />as follows: <br />Surface Slope of Retained earth <br />Equivalent Fluid Pressure (pco <br />Level <br />35 <br />At Rest conditions or Basement <br />60 <br />A pipe and gravel drain (4" perforated PVC embedded in at least three cubic feet of filter <br />gravel per lineal foot of pipe, both wrapped with geofabric) should be provided on the <br />retained side located near the top of the footing base on the outside face. While all <br />backfill should be compacted to the required degree, care should be taken when working <br />close to the walls to prevent excessive pressure. <br />19 <br />