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SOILS AND Gratbeza, load intrncit and erosion characteristics of slope 1 8 05.42.3 Plain concrete f <br /> Matcrasl <br /> Of plain concrete foe i ��. 'The etc th;ckness <br /> 1805 .4Footi Li t - Ong walls of other than <br /> Footings shal be designed an constructed in <br /> Light-frame frame construction shall not be less that 8 inches <br /> Allowable bearing capacity of the soil is not exceeded, and (203 tttm) where placed on soil. <br /> differential settlement is minimized. The minimum Exception: For plain concrete footings cs <br /> Width of footings shall be 12 inches (305 nun) G DS R occupancies. the cdYC thiclrn Pponing <br /> led to be 6 inch. (152 mm , rev idal css Darn i t - <br /> Does not extend ) P that the footing <br /> Footings beyond a dist.sncc greed. that the <br /> 8s to areas with expansive soils shall be designed Thickn of the footing Ca) either side of the supported <br /> In accordance with the provisions of Section 1805.8. Wall. <br /> 1805.4.2.4 Placement of concrete. Concrete footings <br /> 1 805.4./ 1.1 Deli loads F Shall not be placed through waur unless a tremie or other <br /> t 18 most u 1 . 1 Design loads, <br /> the combinations a deli o for method approval by the building ild' r>�cial is <br /> loads s m g used, Where <br /> specified m Section 1605.3. The dead load shall in h aC b under Of in by pace of water the <br /> clued the weight of foundations.. footings and overlying shall be deposited concrete <br /> try approved means to ensure mini <br /> Afire Reduced live basis, as specified to Section 1607.9. mum segregation of the mix and negligible turbulence of <br /> Permitted to be used in designing footings, the water. <br /> 1805 4.12 Vibrato loads. <br /> Vibratory When machinery opera - <br /> now or other vibrations are transmitted through the 1805.4.2.5 Pro Concrete footings <br /> given in the footing shall be protected from during depositing and fat <br /> foundation, consideration shall be giv <br /> design to prevent detrimental dishuti en of the soil. period of nd less than five days thereafter. W <br /> Not be allowed to flow Water shall <br /> 1805.4.2 �$h the deposited concrete. <br /> ruction of con footings, The design, materials and con- 1805.4.2.6 Forming f <br /> 1805.4.2.1 crete footings shall amply with Sections g ° C the +etc footings are <br /> MI 1 803.42 Trough 1805.42.6 and the provisions of t� Permitted to be east against the earth when. in the opin <br /> �- not ion of the building official, soil conditions do o <br /> dance forming. Where forming is required, h shall be in r require <br /> Exception: Where a specific design u not provided, corn. <br /> Crete fo s with Chapter 6 of AC1318. <br /> tings supporting walls of light -frame construe- Cre arc otings ed to be ddi f accordance with 1805.4.3 Masonry footings. The design, 1805.4.2 <br /> with Sections and construction m materiels <br /> 3 1 and -unit footings shall com eras 1805.4.3.1 an 1805.4.3.2, and the provisions <br /> 1805.4 2.1 t Of Chapter 21. <br /> 1 80 5 have a Se strength. Concrete in footings <br /> Less than a sp compressive strength (f c) of not <br /> Exception: per square inch (psi)(17 237 kPa) Exceptr: Where a specific design u not provided me <br /> At 28 days. sonny -unit footings supporting walls of light -frame con - <br /> Struction are permitted to b designed in accordance with <br /> 1805.422 Rcscrvcd, Table 1805.42. <br /> 1805.4.3,1 Dimensions, <br /> laid in Masonry-unit footing shall be <br /> Type M or S mortar complying with Section <br /> • <br /> FOOTINGS SUPPORTING W TABLE 1805.4.2 <br /> ALLS OF LIGHT -FRAME CONSTRUCTION&b.c.d <br /> NUMBER OF FLOORS WIDTH OF THICKNESS OF <br /> SUPPORTED BY 774E FOOTTNGS• FOOTINGS FOOTING <br /> (inches) <br /> (inches) <br /> MIMIIIIIIIIIIIIII IIIIIIIIIIMMMMIIIIWIIIIMIIII 6 <br /> 3 6 <br /> For S 1 ' I inch = 25.4 mm, 1 foot .. 8 <br /> a 304.8 rum. <br /> b Depth of footings shall be m accordance with Scctioo 18052. <br /> b <br /> c T c ground tinder the floor is permitted to be excavated to the elevation <br /> �� 'swalls ru <br /> d-bearing walls permitted to be supported b of the top of the footing <br /> the width shown in this table, and footings shall be Y isolate <br /> footin The footing width and length shall be Twice <br /> d. For thickness of foundation walls, see Section 1805. rent man than 6 Feet on center. <br /> c Footings an permitted to support a roof in <br /> Shall be as required for supporting one fl mQ' to the stipulated number <br /> of floors, Footings supporting roof ow) <br /> f Plain pomade footings for Group R-3 occupancies are permitted to be 6 incises thick <br />