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• SOILS AND FOUNDAA1]ONS <br /> Gradient, load intensity and erosion characteristics of dope 1 805.4 2.3 Plain concrete footings. <br /> Mstcrial <br /> Of plain oonerttc foe The edge t1 cT th <br /> 180 5.4Footi Li Ong walls of other than <br /> ngs shall be designed an constructed in gh t � construction shall not be less that 8 inches <br /> Allowable bearing capacity of the soil is not exceeded, and (203 rnm) where placed on soil. <br /> Thad differential settlement is minimized. The minimum Exception: For plain concrete footings es mn <br /> Width of f Group -3 P ppo g <br /> footings shall be 12 inches (305 mm) R occupancies. <br /> the edge thickness is Po <br /> tcd to bc 6 inches 152 mm , rovided footing <br /> Does not end ( ) P that the foong <br /> Th i l . of the footing ond a distance 9n� side Be�p that the <br /> Footings in areas with expansive soils shall be designed <br /> In with the provisions of Section 1805.8. Wall. <br /> 1805.4.2.4 Placement of cone. Concrete footings <br /> 1 8 05.4. /1.1 Design loads, F shall Shall not be placed through wee.' unless a trtmie or other <br /> the men uaflav Deli effecter Footings <br /> combinations of f or method approved by the build' )fficial is <br /> loads s tog ttscd Where <br /> l bed in S 1605.3. The dead load shall in- hall be u n d er it in the presence of watt., the �� <br /> clued the weight of foundations„ footings and overlying shall be deposited by approved means to ensure mini - <br /> i. Reduced live bads, as specified in Section 1607.9. mum segregation oldie mix and negligible turbulence of <br /> t <br /> Are Permittej to be used in designing footings, the water. <br /> 1805 4.1.2 Vibratory loads. <br /> rY Where machinery opera. <br /> Lions or other vibrations are transmitted through the l 805.4.2.5 Protection of concrete. Concrete footings <br /> fo <br /> dons or of consideration shall be given through <br /> the h the shall bc protected from Sexing during <br /> design to prevent period of not Tess than five depositing as for <br /> de trimental disturbances of the soil. Not be allowed to flow thereafter. con Water shall <br /> 1 845.4.2 Concrete footings, $h the depositexf 000crctc. <br /> Cooc <br /> 18 4.2 of con gs The design, materials and con- 1805.4.2.6 Formin f <br /> 18 uction 1 concrete footing, shall comply with Sections t ° C st the Concrete footings are <br /> through 1805.4 2.6 and the provisions of Ch permitted to be east against the earth where. in the opin- <br /> 18 1 1 .42. t Chap- ion of the building official, soil conditions do not <br /> forming Wh forming equire <br /> dance with g� h shat! be in accor- <br /> Exception: Where a specific design u not provided, con- <br /> Crete footings Chapter 6 of AO 3 18. <br /> Cr supporting w alls of light-frame t- <br /> Cr are 8 gh Same construe- 1805.4.3 M <br /> Permitted to be ddi ed in accordance with 8 tion of tit footings. The deign, mat <br /> Table 1805.4 .2 <br /> and construction of masonry-unit footings <br /> With Sections 1805,4.3.1 and 1805.4.3; shall <br /> S Of Chapter 21. <br /> 1 8U.42.1 provisions <br /> 180 have e � sue. Concrete in footing, <br /> Less than a specified <br /> pounds per strength (f c) of not ) <br /> At 28 der per square inch (psi)(17 237 P a so Exception: Where a footings supporting walls design is o flit f light-frame ed, c o n - <br /> n- <br /> days. <br /> my - unit uporti o <br /> Siruction are permitted to b designed in accordance with <br /> 1805.4.2.2 Reserved. Table 1805.42. <br /> 1805.43.1 Dimensions, Masany -unit footing shall be <br /> laid in Type M or S mores complying with Section <br /> FOOTINGS SUPPORTING W TABLE 1805.4.2 <br /> ALL S OF LIGf1 FRAIL CONSTRUCT1ONa.b.c.d <br /> NUMBER OF FLOORS WIDTH OF THICKNESS OF <br /> SUPPORTED BY THE FOOT�GS • FOOTINGS • FOOTING <br /> (inches) <br /> (inches) <br /> 6 <br /> 3 6 <br /> For S I' 1 inch = 25.4 m 304 <br /> m, 1 foot - 8 <br /> 304.8 rtun. <br /> a Depth of footings shall be in <br /> b accordance with Section 1805.2. <br /> The ground under the floor is permitted to be excavated to the eleti <br /> c Interior-stud-bearing wafts are Pfd to be supported b don of the top of the footing <br /> the width shown in this table, and footings Y kO than footings. The fO° 8 width and length shall be rwir <br /> 8s shall be spaced not more than 6 Felt on aster, <br /> d. For thickness offoundation walls, sec Section 1805.5. <br /> c a <br /> S � be <br /> are as required for roof floor addition to the stipulated number of floors, Footings supporting root' o� <br /> f. Plain concrete footings for Group R-3 ottupane;es arc permitted to be 6 inches thick <br />