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SOILS AND FOUNDAAllONS <br /> Gradient, load intensity and erosion characteristics of slope 180542 <br /> ...3 Plain <br /> Mstcrial concrete footings. The edge thickness <br /> Of plain concrete footings supporting walls of other than <br /> 1805 .4Footirhgs shall be designed an constructed in Light - fame construction shall not be less that 8 inches <br /> Allowable bearing capacity of the soil is not exceeded, and Exception: mm) whin pained c soil. <br /> Thai differential settlement is minimized. The minimum Exception: For plain concrete footings <br /> Width of footings shall be 12 inches (305 min) Group R -3 oceWrancies. the edg thickne is supponing <br /> tcd to bc 6 inches (152 mm),provided that the footing <br /> Does not extend beyond a distance greater that the <br /> Footings N areas with expansive soils shall be designed Thick 7j of the footing ,;n either side of the suppat <br /> In accordance with the provisions of Section 1 805.8. Wall. <br /> 1 805.4.2.4 Placement of concrete. co ocrzte footings <br /> 18 05.4./1. l Design loads, Footings shall be des' Shall nol be placed through wawa unless a trernie or other <br /> the most tmfavorribk effects due to the combinations of for method approved by the building h�ciel is used Whcrc <br /> loads specified in Section 1605.3. The dead load shat) in- placed under °f in the presence of water„ the clued s c weight of fcti 16 5. footings dead l overlying shall bc deposits concrae <br /> by approved <br /> mix and negligible to ensure mini <br /> fill. Reduced live loads, as specified in Section 1607.9. mum segregation of the mix and ncgligiblc turbulence � <br /> Are pitted to be used in designing footings, the <br /> I 80 <br /> 1 5 .4, 1 Vibratory loads, Where 180 4, rY n machinery o ff - 1805.4.2.5 Pro <br /> other vibrations are transmitted through the SOD of ezing during n frog footings <br /> foundation, consideration shall be given in the f shall be Protected from freezing dtutng <br /> found to prevent co s d ratio shall footing a period of not Ie5.7 than five depOBitlrlg end for <br /> disturbaoc s of the soil. Not be allowed to flow thereafter, Watch shall <br /> 1 805.42 Concrete footings, �� the deposited concrete <br /> of concrete of ting shall s ign materials and con- 1805.4.2.6 Forming of concrete. <br /> 1 805.4.2.1 ructio ply with Sections permitted to be east Concrete footings in a are <br /> through 1805.42.6 and the provisions of Chap. ion of the building n� the earth where, the opin- <br /> 118 1803.4 2. <br /> official, soil conditions do not <br /> forming. Where forming require <br /> dance with 8� h shall bc In <br /> Ex a specific design is not provided, can a 6 of AC] 318. <br /> Exception: Whore r <br /> Crete footings supporting walls of light -dame construe- Crete <br /> are Permuted Lobe designed of l accordance with 1805.4.3 Masonry footings. The desi <br /> Table 1805.4 2 and construction of mat<anry -unit footings sha materials comply <br /> with Sections 1805.4.3.1 and 1805.4.3 th p v <br /> 5 Of Chapter 21. <br /> 1 805.42.1 prvvisioru <br /> Shall have 5 arc strength. COOS in footings <br /> Less than 2,500 pounds compressive strength (f c) of not <br /> Per square inch (psi)(17 237 kPa) so Exception: Where a footin <br /> 8s s u t g w a l l u not provided, ms- <br /> At 28 days. my -unit uporting walls of light -tiamc con - <br /> 1805.4_22 Reserved. Strucbon arc permitted to b designed in accordance with <br /> Table 1805.4.2. <br /> • <br /> 1805.43.1 Dimensions, Masonry-unit footing shall be <br /> laid in Type M or S mortar complying with Section <br /> FOOTINGS SUPPORTING W TABLE 1805.4.2 <br /> ALLS OF LIGHT -FRAME CONS7RUCiION&b.c.d <br /> NUMBER OF FLOORS WIDTH OF • THICKNESS OF <br /> SUPPORTED BY THE FOOTINGS• FOOTINGS F riche <br /> (inches) FOOTING <br /> (inches) <br /> 6 <br /> 3 6 <br /> For S 1 I inch = 25.4 mm, I fool e 8 <br /> 304.8 rum. <br /> a Depth of footings shall be in acoordancc <br /> b The ground under the Boor is with Section 1805,2. <br /> c permitted to be excavated to the elevation of the <br /> iaterinr -stud. g walls are permitted to be supported by top of the footing <br /> the width shown in this table, and footin Y isolated than 6 footings. The ce nhag width and length shall be twice <br /> d. For thickness of foundation walls, see Section 1805 spaced not more than 6 Fed on center. <br /> e Footings an permitted to a roof to , . <br /> Shall be as upporting Poe addition to the stipulated number of Boors, Footings skiing root only <br /> I. Plain required for s <br /> concrete footings for Group R -3 occupancies arc permitted to be 6 inches thick <br />