Laserfiche WebLink
2 .33 <br />z .34 <br />Our Job 81-20-00 Page 14 <br />Lateral Loading. We recommend that foundation <br />elements designed to accommodate lateral loads be sized <br />using active and passive earth pressures of 30 and 300 <br />pounds per cubic foot, respectively. A coefficient of <br />friction of 0.4 may be used for determining resistance <br />along a soil-concrete interface. <br />Actual Foundation Soil Conditions. These <br />foundation design criteria should be confirmed for accuracy <br />when the building pad subgrade has been constructed to <br />rough grade. <br />2 . 40 PAVE}'{ENT DE S I GN <br />We recommend that for preliminary planning pur- <br />poses, a stabilometer "R"-va1ue of 20 be used for deter- <br />mining thickness of the pavement in the parking areas and <br />driveways. This should be verified by testing prior to <br />completion of the grading. If this value is rePresentative <br />for the subgrade soi1, a structural section consisting, <br />for example, of three inches of asphaltic concrete (i.e., <br />CalTrans, Type B, %-inch) over four inches of aggregate <br />base (i.e., CalTrans, Class II , 3/4-inch), and three inches <br />of asphaltic concrete over five inches of aggregate base <br />would be adequate for light-duty (parking) and medium-duty <br />(truck access), respectively. We recommend that use of <br />at least four inches of PCC pavement supported by four <br />inches of aggregate base in truck loading areas.