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SOILS AND FOUNDAA11ONS <br /> Cira.dient, load intensity end crackup cdarecteristics of slope 1 805.42.3 Plain concrete f <br /> Material <br /> Of plain concrete foo The edge thickness 1805.4Footi solvating walls of other than <br /> Footings shalt be designed an constructed in Light -frame construction shall not be Tess that 8 inches <br /> Allowable bearing capacity of the soil is not exceeded, and (203 mrn) where placed on soil. <br /> Thal differential settlement is minimized. The minimum Group 'on: For plain concrete footings su <br /> Ex p ; <br /> Width of footings shall be 12 inches (305 mm) Group R -3 occupancies. the edge thickness <br /> red to be 6 inch= (152 mm , rov ided ass i n - <br /> Does not extend trey i P that the Looting <br /> nod a distance greater that the <br /> Footings in areas w Fall. ith expansive soils shall be designed all. of the tontine t.11 either side of the suppsupported b' acccoraccordance with the provisions of Section 1 805.8, <br /> 1805.4.2.4 Placement of concrete. Concrete footings <br /> 1805.4./1.1 Design loads, F shall Shall not be placed through wait' unless a tremic or other <br /> t men uufavo Design <br /> effects Footings r i n g camb o f or method approved by the build' 11�ciaJ i <br /> loads s Where <br /> te <br /> specified in Sect 1605.3. The dead load shall in. h a l be t1°� or to the presence of water„ the concrete <br /> clued the weight of foundations„ footings and overlying shall be deposited by approved means to ensues mini - <br /> fill. Reduced live loads, as specked in Section 1607.9. mum segregation of the mix and negligible turbulence of <br /> Are permitted to be used in designing footings, the <br /> 1805.4.1 Vibratory loads. �.transmitted Where through rh a- 1805.4.2.5 Pro Concrete footin <br /> m or other vibrations are faction of concrete. <br /> foundation, o r vibrations <br /> ion shall bc en in e o he shall be protected from fain nS <br /> tio <br /> fou to period of not Thess than five 8 demure after. depositing and for <br /> design pm'e detrimental disturbances of the soil. thereafter. Water shall <br /> Not be allowed to flow through the depositn;d aoacrotc. <br /> 1805.4 4 � footings, <br /> shall comply against t he earth where, Concrete foongs, The deli <br /> 1 805 of cmtxe f ti rnatrrials and con- 1805.4.2.6 Forming of concrete. <br /> 1 805.4.2.1 through 1805 ply with Sections permitted to be east earth where fO ere. in the the are <br /> .4 2.6 Ch and the provisions of opin- <br /> ter 18 I .42.1 aP- ion of the building official, soil conditions do not require <br /> forming. Where forming b required it shall be in accor- <br /> 70°: Where a specific dank dance with Chapter 6 of AO 318. <br /> gn is not provided, cnti. <br /> Crete footings supporting walls of light -frame construe- 1805.4.3 M <br /> tioo are permitted to be designed in accordance with conry footings. The design, materials <br /> Table 1805.4.2 and construction of masonry -unit footings shall comply <br /> with Sections 1805.4.3.1 and 1805.4.3.2, end the provisions <br /> 1805.42,1 Of Chapter 21. <br /> Sha a �� compressive in footings <br /> ll hove <br /> S than e W pressive strength c) of not <br /> Pounds per square inch i 1723 7 kPa) sException: <br /> ny -u <br /> `'` nit f ootin g s specific po ri design is not ht -r d, me- <br /> At 28 days. tinit f <br /> St action arc 8s red 10 b d walls of lig esigned in accordance con_ <br /> permitted to b designed with <br /> 1805.4.2.2 Reserved. Table 1803.42. <br /> 1805.4.3.1 DiMeini011s, Mary -unit footing shall bc <br /> laid in Type M or S mortar complying with Section <br /> • <br /> FOOTINGS SUPPORTING W TABLE 1805.4.2 <br /> ALLS OF LIGHT -FRAME CONSTRUCTIONa.b.c.d <br /> NUMBER OF FLOORS WIDTH OF THICKNESS OF <br /> SUPPORTED 13Y THE FOOTINGS STINGS FOnches) <br /> (inches) <br /> (inches) <br /> 6 <br /> 6 <br /> 3 <br /> 8 <br /> For S 1 ' 1 inch = 25.4 mm, 1 foot a 304.8 rum. <br /> a. Depth of footings shall be in accordance with <br /> b fix >�uwnd under the floor is won 18052. <br /> c permitted to be excavated to the elevation of the top of the footing. <br /> the walls are <br /> tablet permitted to be supported by isolated footings. The footi <br /> footings shall be spaced not more than 6 Feet one width and length stall be twice <br /> d. For thickness of foundation walls, see Section 1805.5. <br /> c Footing arc Permitted to a root bo m the ' ' <br /> Shall be as required for supporting one fl stipulated number of floors, Footings supporting root' ono <br /> C Plain concrete footings for Group R -3 oompancies are permitted to be 6 inches thick <br />