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<br />, rr lImenl Jc.aiJ 11l1tJ1.\ Ily IlIJd UOSJOO clJ.aru:1u-isbcs of ~h>pt <br />\hUC1l!U . <br /> <br />I ~(1<i4FootJflg.'i shall tic deslgn<<J 8II constructed lfl <br />A.11'-''>\'ht>Jr bcarin~ ~acily of the ~oil i~ nol exceeded, And <br />I haJ dltrcrClJt.lAJ 5cttJemCllt i.s minimized The minimum <br />Width (If t(x>{in~ ~I t>( 12 iIK-'hcs 1305 mm) <br /> <br />f l>Otmgs in areas "1th expansiYe soils slJalJ be desIgned <br />in I1ccoldance with the provisioru of Sectioo 18058 <br /> <br />I ~O) 4 j I, J Design loads, Footings shAll ~ designed for <br />the ~1 wilit vOCllbk effectB due to the combinationB of <br />I,,/Ids specified in Scctioo 1605,3, The dead load !haJJ in- <br />cJue-<J the weight of foundatioru.. footings and ove.rlying <br />fiLl Reduced live loads, ~ Iptctned In Section J 60 7,9 <br />Are remUtted to be used in designini foodngll, <br /> <br />1805 4 12 Vibnuory loads, When machinery open- <br />t} Drl.'i or other vi bratiorn 1111: transmitted through th e <br />f ound1!tioo, cons j deration 5h aJ I be iiven in the footing <br />dcsi gn to prevent droimcntal disturbances of the soil. <br /> <br />1 &05.42 ~ footing&, The design, materials and COo- <br />struction of concrete footinp shaH C<nlpJy with Section3 <br />1&0542,J through 1805.4.2.6 and the provisiom ofOlap- <br />ter I 80:1.4 2 . <br /> <br />b.~: When: a specific design iJ ooc provided, con- <br />Cretc footings supporting walI3 of light-frame COOStruc- <br />lion are permjoed to be d~igned in accordance with <br />Tl1b1c 1&0542 <br /> <br />1&0542. J Coocrctc strength. Coocretc in footings <br />Shall h.eve II spooIDed COInpresaive Itreogth (f c) of ~ <br />Less than 2.500 pounds per square inch (psi)(J 7 23 7 kPa) <br />AI 28 days <br /> <br />J &05 LU Rt:6CfYed. <br /> <br />SUit SAND HllfNDAA I 11 It;' <br /> <br />J 80.5 4.1 J PlAin concrete footinss Tbt c.dgr tnJ(l Dn~ <br />Of plain CtJnCrctc footing3 ropP<Jrting walli of Ot1JC1 t.hall <br />Li gh t. fum e COM tructi 00 a.haIJ 001 Ix I cs.s I1lAJ 8 In che:, <br />(203 mm) when placed on soil <br />Exuption: For plain concrete footinp SUppuT1lrJ! <br />GroUp R-3 OCCUpancie:; the odic thicblCS-'J is lXTnlll <br />le{j to be 6 inches (152 1ll!Tl),prClYided tiuu (tIC [coO{lfli <br />~ DOt extenrJ bC'yond B diSt3flCC grt:aleJ tiuu the <br />Thi~ of the footin~ U) c1thCl ,ide of lh<: ,upp<-_ 10,1 <br />Wall <br />1805.4.2.<.1 PlacemCUl (If Ctlrlcrete Cooc7cu: fOOllflg.< <br />SbaH DOt be placed through W14'.J unless 8 trmUt 01 olhu <br /> <br />method Bpproved by the buiJd~ )lliciaJ is usaf Where <br />p llloC<<l und.c:l 01 in the pruIeoce 0 f WlUer.. t..hc: c.onc.ctt <br />shall be deposited by approved means 10 ensure OIlIlI' <br />mum segregation of the mix and negligible lurbuJe:nu: ,>1 <br />the Wll1er. <br /> <br />1805.4.2.5 Protectioo of concrete. Concrete footing5 <br />sha1l be protected from freezing durinE depositing IInd fui <br />8 peri od of not less than five da)'3 thereafter W Il1c1 shllJ I <br />NOI be allowed to flow through the deposited COOCrciC <br /> <br />1 W5 .4.2.6 F orrning of CUK:rcte. Concr-etc fOOOngB &I e <br />permjtted to be cut egainlt the earth whert, in the opin- <br />ion of the buildini official, soil conditions do DOl rcqUUc <br />forming.. Where forming Is requ1red, h shall bot In IICWr- <br />dance with Olapu:;r 6 of A Cl 3 I 8 <br /> <br />1805.4.3 MlOOnry-Wlit footings. The design, ffiatc:nals <br />and construction of muonry-unit lQoting.:! shaH comply <br />with SectiOO3 1805.4.3.llIfld 18~4.32. md the proVISlvns <br />Of Chapter 21 . <br /> <br />Exceptioo: When . apccific dc6ign iJ DO( providod, lru> <br />sonry-unit footings supporting waJls of light-frame COIl- <br />Struction are permitted to b designed in accordance With <br />Table 1~.4.2. <br /> <br />1805.43.1 DimaWooe, Masaory~t footing ahalJ be <br />laid in Type tv{ or S mortar complying with Section <br /> <br />TABLE 1805.4.2 <br />FOOTINGS SUPPORTING WALLS OF LIGHT-FRAME CONSTRUcnONllb.c.d <br /> <br />, i <br /> WIDTH OF , THICKNEss OF <br /> NUMBER OF FLOORS FOOTINGS FOOTING <br /> SUPPORTED BY TIiE FOOTINGS. (inches) (inches ) <br /> I 12 6 <br /> 2 15 6 I <br /> I <br />I 3 18 8 ) <br /> <br />~ 01 S 1 I inch =0 25.4 mm. J foo( ., 304.8 rnrn. <br />11 Depth of footing! shall be in accordance with ~tioo 18051, <br />b The ground under the t1001 ill pennjttuJ to be excavated to the elevation of the top of the footing. <br />c lntttior~ walli are pcnniu.ed to be IUpported by iJ.o1ated footings. The footinB width and lc:ngtb obaJl be ['\1.'\(<: <br />the width shown in this table, and footing3 shall be spaced not more thll1l 6 Feet on center. <br />d For thickness offoundatioo walls, see Section 1&05.5. <br />Footings art permitted to support . roof In additioo to the stipulated numbct of fioon, Footings sl1pp(Jrtmg root c~lh <br />Shall be as required for supporting ODe floor <br />Plain COOCrt:te footings for Group R-3 occupancies art permitted to be 6 inches thicl: <br />