08-22-1988 - Agenda Packet City Council - regular meeting

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,J UNIFORM BUILDING CODE person making or causing the excavation to he made shall t,.+tify in writing the owners of adjoining buildings not less than if)days before such excavation is to he made Ihat the excavation is to be made and that the adjoining buildings should he prolected. 'fhe owners of the adjoining properties shall he given access to the excay:uion for the purpose of protecting such adjoining buildings. Any person making, or causing an excavation to be made exceeding 12 fret in depth below the grade shall protect the excavation so that the adjoining soil will not cave in or settle and shall extend the foundation of any adjoinirg buildings below the depth of 12 feet below grade at his own expense. The owner of the adjoinin¢ buildings shall extend the foundation of these buildings to a depth of 12 t VA7M3 feet below grade at his own expense, as provided in the preceding paragraph. Soil Classif[Cation—Expansive Soil Sec. 2904. (a) Soil Classification: Gene] A. For the purposes of this chapter, the definition and classification of soil materials for use in fable No. 29-B shall Sc according to U. B.C. Standard No. 29• ! . (b) Expansive Soil. When the expansive characteristics of a soil are to be determined, the procedures shall be in accordance with U. B.C. Standard No. 29- 2 and the soil shall be classified according to Table No. 29-C. Foundations for structures resting on soils with an expansion index greater than 20, as determined by U.B.C. Standard No. 29-2. shall require special design consideration. In the event the soil expansion index varies with depth, the weighted index shall be determined according to Table No. 29-D. Foundation Investlgatlon Sec. 2905. (a) General. The classification of the soil at each building site shall be determined when required by the building official. The building official may require that this determination he made by an engineer or architect licensed by the slate to practice as such. (b) Investigation. The classification shall be based on observation and am necessary tests of the materials disclosed by borings or excavations made in appropriate locations. Additional studies may be necessary to evaluate soil strength, the effect of moisture variation on soil *hearing capacity, compressibility and expansiveness. (c) Reports. The soil classification and design bearing capacity shall be shoe n on the plans, unless the foundation conforms to Table No. 29-A. The building Official may require submission of written report of the investigation whirl: shall include, but need not be limited to. she foliowing information: I . A plot showing the location of all test borings and/or excavations. 2• Descriptions and classifications of the materials encountered. 3. Elevation of the water table, if encountered. 4. Recommendations for foundation type and design criteria including bear- ing capacity, provisions to minimize the effects of expansive soils and the 5. Expected total and differential settlement. 522