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Gradient load intensity AND FOUNDAATIONS Material rntcatrty and erosion characWis>;es of elope . Piero concrete footings. Of plain concrete foe The edge thickness than n gs shall be designed an constructed in Li - construction shall not be less that 8 inches 180 5.4Footi n8 walls of other char, Allowablc b�rinB opacity of the soil is not exceeded, and Exception: For (203 mm) where placed on soil. That differential ble beer i settlement is minimized. The minimum lain non Width of footings Group R -3 P erect footings sup is p ing ga shall be 12 inches (305 mm) Led to be 6 chcs ( I 2 ro thickness tha is titanic_ tnch (152 mm),provided that the footing Does n ot extend beyood a distance greater that the In Footings in areas with expansive soils shall be designed Thickness of the footing ,:.11 either side of the supppteA accordance with the provisions of Section 1805.8. 1805.4.2,4 Placement of concrete. Cooaetc footings 1 805.4./ j , l Design loads, F shall be Shall Dot be placed through was r Mess a tunic or other t 18 most t 1.1 Deli effects due combi of for method approved by the build Where loads most specified u 1f v Section 1605.3. du The dead load placed under or in the ti�cial is the co nne clads the weight off shah in • shall bed presence of waver the mini c1u. foundations„ footings and overlying deposited f approved m x and means to ensure l e n t Reduced live loads, as specified in Section 1607.9. mum segregation of the mix and negligible turbulence of Arc permitted to be used in designing footings. the water. 1805 4. Vibrato 180 4. ry loads. Where machinery opera - footings other vibrations art transmitted through the shrill be pr Protection free a z e, during Concrete sing an foundation, consideration shall be given in the footing protected from f' vc d s then depositing and for design to prevent detrimental disturbances of the soil. a Denied of not less than five days thereafter. Watt, shall - Not be Wowed to Dow through the deposited concrete . 180542 footings, The dear ' mate 1 80 5 4.2 of cut design, 1805.4.2.6 Forming Concrete f txctc footings shall cam g I ructio,2.1 permitted to be east °Ot are to 1 805.42. through 1805.4 2.6 and the provisions clamp- against the earth what, in the opin- ion of the building official, soil conditions do Dot forming, Where tomato b require g required, h shall be In accor- Crete Exception. Where a specific design u not provided, corm dance with Chapter 6 of ACI 318. f °otings suppo j of walls light -frame coostrUC. COO are to be designed in accordance with 1805.4.3 Masonry Table 1805.4 2 and construction gs -unit footings. Thc design, matarn of masonry -unit footings shall compl With Sections 1805.4.3.1 and 1805.4.3.2, and the provisions 12.1 Concrete Of Chapter 21. 805.4 1 80ll have s . Coocrctc in footings Less than 2,500 specified compressive strength c) of not )( s At 28 der pounds Per square inch (psi )(17 237 kPa) 0Jy -unit Exception: footings • specific design 11 u not provi Ys. onny it ootings supporting walls of light -frame con 1805.4_2.2 Strucdon are permitted to b designed in accordance with Reserved. Table 1805.4.2. 1805.4.3.1 Dimensions, laid in try -ttnrt footing shall be Type M or S mores complying with Section • FOOTINGS SUPPORTING W TABLE 1805.4.2 ALLS OF LIGHT -FRAME CONSTRUCTION&b.c.d NUMBER OF FLOORS NTH OF THICKNESS OF S UPPORTED BY THE FOOTINGS • FOOT (inch e es) )GS FOOTING (inches) ■ 6 3 6 For S I I inch = 25.4 tnm, I foot e mm. 8 a 304.8 Depth of footings shall be in accordance with Section 1805.2. b. Thc ground under the Boor is c permitted to be excavated to the elevation of the top of the footing walls are m idus ale ape ltd sba supported by isolated footings. The footing width and t d. For thickness of foundation wall see S not men than 6 Acct on center. c" shall be rwir s. ectrtan 1805.5. e E hat for supporting hall one addition W the stipulated number of floors, Footings supporting roof onh S Shall be as Plain concrete footings for Group R -3 occupancies are permitted to be 6 inches thick