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SOILS AND FOUNDAAllONS eiradiear, lead intensity and erosion edaractrube of slope 1 805.42.3 Plain concrete f Material Of plain concrete footings ��' The etc thicJcntss 1805.4Footi supporting Halls of other than, Footings shall be deli ed an Li gh t - fie construction shall not be less that 8 inches 1 8 ow . 4 F otings constructed in (203 rnrn) capacity of the soil is not exceeded, and )der Placed c soil. f Ihat differential settlement is minimized. The minimum Group For plain concrete footings s0 Width of footings shall bc 12 inches (305 mm) God R'3 occupancies. the edge thiclm P is p c m Led to bc 6 inches (152 true ), rovided at Pootin P that the footing n g DOes not extend beyood a distance greater that the Footings in areas with expansive soils shall be designed Fall. all. nc" of the footing �„ tither side of the supported In accordance with the provisions of Section 1805.8. 1805.4.2,4 Placement of oortcretc, Genoese footings 1 805.4./1.1 Deli loads F Shall not be placed through wait" unless a trcmic or other B10 ootings shall be designed for method Where the n-sosi 11 IIfavorabk effects due to the combinations of approved by the building water„ is used rete loads specified in Section 1605.3. The dead load shall in- Placed under or in the presence of wtuu clued the weight shall be deposited " the e mini - 81t .unladen, footings and overlying by approved negligible i ensure turbulence fill. Reduced five loads, as specified in Section 1607.9. mum segregation of the mix and negligible turbulence .;I Are permitted to bc used in designing footings, the water. 1805 Vibratory 185 4.12 8 or ry Where machinery 1805.4,2.5 Protection of other vibrations are transmitted through the concrete. Concrete deco foam foundation, r consideration shall be shall bc protected from freezing during 8S given in the footing a period of not less than five thereafter. depositing and for design to prevail detrimental distu ces of the soil. days posit W Not bc allowed to flow through Water shall 1 805.4.2 the deposited concrete. 1805 of con footings, The design, materials and con 1805.4.2.6 Forming of concrete. cute footings shall comply with Sections earth where, footings are 1 805.42.1 through 1805.41.6 and the provisions of t� Permitted to bc cast against the earth when, in the to 5. 4 2 4 2. forming. Chap- ion of the building e q u i dingo ng soil conditions s do not require & Wbere forming !s required, h shall be in accor- Exception: Wbere a specific design is not provided, con- danCe with Chapter 6 of ACI 318. Crete footings supporting walls of light -frame construe- don are permitted to be designed in accordance with 1805.4.3 construction Masonry footings. The ing s materials Table 1805.42 sod construction of mavoruy - unit footings shall I. with Sections 1805.4.3.1 and 1805.4.3.2, and ch 1 805.42. J Of Chapter 21. pru Concrete ; ete strength. Concrete in footings Shall have a compressive strength Less than 2,500 cthe pounds per ( f' c) of not Per square inch i 1723 7 kPa) s Exception: - njl Where a specific footings supporting c design wal s is o flit f light-frame con ,n - At 28 days. rtry -unit wall of - struction are permitted to b designed in accordance with 1805.4 _2.2 Reserved, Table 1803.41. 1805.43.1 Dimensions, Merry-unit footing shall bc laid in Type M or S mortar complying with Section • FOOTINGS SUPPORTING W TABLE 1805.4.2 WA OF LIGHT -FRAME CONSTRUC71ONa-b.c.d • NUMBER OF FLOORS WIDTH OF THICKNESS OF SUPPORTED BY THE FOOTINGS* FOOTINGS FOOTING (inches) (inches) 6 3 1.111.11111111111111111 6 F 8 S l I inch = 25.4 mm, 1 foot e 304.8 stun. a Depth of footings b shall be m accordance with Section 18052. b c The ground under the floor is permitted to be excavated to the elevation I nterior-stud-bearing walls are permitted t be of the top of the footing the width shown in this table, and footings shall by isolated footing'' The footing width and Length shall be rw cc spaced not more than 6 Fat on center, d For thickness of foundation walls,' sec Section 1805.5. hall be as e S Footings are permitted to one on to the stipulated number of Boors, Footings supporting roof onl) required for supporting f Plain concrete footings for Group R-3 occupancies art permitted to be 6 inches thick