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• ' . •'t..■—a ™ <br />DETAILED REGULATIONS <br />Chapter 29 <br />EXCASMTIONS. FOUNDATIONS AND RETAINING WALLS <br />Scop« <br />Sec. 2f01. This chapter sets forth icquirements for excavation and fills fiw any <br />building or structure and for foundations and retaining structures. <br />is made to Appendix Chapter 70 for requirements governing er.cava* <br />tion. grading and earthwork cwmruction, including fills and eipSankments. <br />Quality and Design <br />Sec. 2902. The quality and design of materials used structurally in excavations, <br />footings and foundations shall conform to the requirements specified in Chapters <br />23,24,23,26 and 27 of this code. <br />Excavaliens and Fhit <br />Sec. 2903. (a) Gcacral. Excavation or fills for buildings or structures shall be <br />so constructed or protected that they do not endanger life or property. <br />Slopes for permanent fills shall be not steeper than 2 horizontal to I vertical. <br />Cut sl(^ for permanent excavations shall be n« steeper than 2 horizontal to 1 <br />vertical unless substantiating data justifying steeper cut slopes are submitted. <br />Deviation from the foregoing limitations for cut slopes shall be permitted only <br />P***®”****®® of * investigation report acceptable to the building <br />No fill or other surcharge loads shall be placed adjacent to any building or <br />suucture unless such building or structure is capable of withstanding the addi­ <br />tional loads caused by the fill or surcharge. <br />Existing footings or foundations which may be affected by any excavation shall <br />be underpinned adequately at otherwise protected against settlement and shall be <br />protected against lateral movement. <br />Fills to be used to support the foundations of any building or structure shall be <br />placed in accordance with accepted engineering practice. A soil investigation <br />report and a report of satisfactory placement of fill, both acceptable to the <br />building official, shall be submitted. <br />(b) Proicctioa of A4|oiniiig Property. The requirements for protection of <br />adjacmt property and depth to which protection is required shall be as defined by <br />prevailing law. Where not tkfined by law, the following shall apply; Any person <br />making or causing an excavation to be made to a depth of 12 feet or less below the <br />grade shall protect the excavation so that the soil of adjoining property will not <br />cave in or settle, but shall not be liable for the expense of underpinning or <br />exteiuling the foundation of buildings on adjoining properties where his excava­ <br />tion is not in excess of 12 feet in depth. Before commencing the excavation, the