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• <br /> SOILS AND FOUNDAAllONS <br /> Gradi characteristics of dope c:eat, load int=nsity. and erosion radi a! ' o'pe 1 805.4.2.3 plain concrete f <br /> Of plain concrete fop • footings. The ed gy thickness <br /> 1 805 .4 Footings Li t. supporting Walls of other than <br /> ngs shall 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 mm) where placid on soil. <br /> That able differential settlement is minimized. The minimum Exception: For plain <br /> Width of f P concrete footings supposing <br /> footings shall be 12 inches (305 mm) tcd to be 6 ooh s (l 5 s. 2 m the BYO thickness is footing <br /> ohm (15 es. <br /> that the footin <br /> Does not extend beyood a distance greate that the B <br /> Footings in areas with expansive soils shall be designed Thickness of the footing ..:n tither side of the supp <br /> In accordance with the provision of Section 1805.8. <br /> 1805.4.2.4 °lecemtat of concrete. Concrete footings <br /> 1 8 05.4./ 1. 1 Design loads, F shall be <br /> Shall not be placed through watr.r unless a trerrtie or other <br /> t 18 5.4 wnfav Deli effects due to combinations datg� for method approved by the building ifl5ciel is u <br /> loads most u ed in Section 1605.3. s du The dead load of placed under or in the Where the concret <br /> clads s he weight shall in- shall bed presence of water„ ensure <br /> Bh oundations.. footings and overlying mum by approved means to ens <br /> 611. Reduced live mum segrtgaL� of the mix and negligible arc mini- <br /> Are permitted to be loads, 13 used in designing ru ! f Sea the water. <br /> Section 1601 turbulence of <br /> Being footings. <br /> loads. ry 12 Vi <br /> 8 <br /> 105 . 4 .brato lds. When machinery opera- 18 4. other orato l ds tr Wher m through the 1805.4.2.5 Protection of concrete. Co <br /> bons or f consideration shell be given in the footing shall be protected from Ong during depositing and <br /> design to foundation, prevent ons detrimental ration ll be <br /> oldie g a period of not less than five days thereafter . t er shall <br /> and for <br /> Not be allowed to flow se <br /> 1 805.4.2 Ca►creu footings, through the deposited concrete <br /> 8s The design, materials and coo- <br /> 5 of oanercte footings shell amply with Sections 1805.4.2.6 Forming of concrete <br /> Concrete footings <br /> ter 80524 <br /> w g <br /> through 1805.4 2.6 and the provisions of Chap- ion of the building official, soil conditions do not permitted to east leggiest the earth where, d, are <br /> � in- <br /> forming Where forming is required, tt stuW be In accor require <br /> - <br /> Crete footings a specific design u not provided, co dance with test 6 of ACI 318. <br /> 8s supporting walls of light -frame construe - <br /> UOO are permitted to be designed in accordance with 1805.4.3 Masonry-unit footings. The deli <br /> T 1 805.4 2 and oorutruction of m matoriels <br /> with Sections 1805,4.3 1 d 805 and the provisions <br /> 5 Of Chapter 21. <br /> 180.42.1 provisions 1805 a to strength. Concrete in footings <br /> Shal have than • sp impressive strength (f c) of not <br /> Al 28 des Pounds Per square inch (psi)(17 237 k?a) Ex io ga: Where a specific design u gaol provi <br /> Ys. sorry footings supporting walls of light - iramc tor, <br /> 1 805.4 2 2 Structwn are permitted to b designed in accordance with <br /> Rcscrvcd. Table 1805.42. <br /> 1805.43.1 Dom <br /> May -unit footle shall bc <br /> laid in Type M or S mortar complying with Section <br /> • <br /> FOOTINGS SUPPORTING W TABLE 1805.4.2 <br /> p►LLS OF LIGHT -FRAME CONSTRUCTIONa.b.c.d <br /> NUMBER OF FLOORS <br /> WIDTH OF THICKNESS OF <br /> SUPPORTED BY THE 4TITIGS• �1GS <br /> (inches) FOOTING <br /> � <br /> (inches) <br /> _II _I _II _ IIIIIIIIIIIIIIIIIIIIBI IIIIIIIMIIMIIMIIIIMIIIIIIIIIIIIII <br /> 6 <br /> 3 6 <br /> — <br /> 111111111/111111111 8 <br /> For SI' 1 <br /> inch - 25.4 mm, I foot a 304.8 Ism. <br /> Et. D of footin <br /> b ga shall be in accordance with Section 18052. <br /> ground under the floor is permitted to be excavated <br /> c to the elevation of the top of the footing <br /> walls are the wid gw table pp d to be supported by isolated f <br /> ngs shall be spaced not more than footing width and length chalk be twice <br /> d. For thickness of foundation walls, see Section 1805.5. <br /> c Footings are permitted to support a roof to addition to the <br /> Shall be as required for supporting one Boor. stipulated number of Boors, Footings supporting roof ooh <br /> f- Plain coaarte footings for Group R-3 occupancies arc permitted to be 6 inches thick <br />