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<br />'rfll[Lcn! ](.J;[j UlltIlilt! f1IJd uusjoo c.hb.rhCluistics of ~h'PC <br />MlllC{llU <br /> <br />115(1 'i 4 Footmgs shall b( desIgned IlI1 COnstructed Ul <br />AJlco\>,l1blc bcerin~ ~a.city of the ~oil i~ nOI exceeded, and <br />Iltal d i fleT"cntiAJ ~ ettJ erTlC'llt i3 m inimi.zcd Th e minim urn <br />Width of f(o(~ing;. shaJl t><: 12 iIH.---hes (3(l~ mm) <br /> <br />f ('(Xmgs In llrtas with expansive soils shaJJ be designed <br />In I1c(:oldance with the provision" of Sectioo 1&05.8 <br /> <br />! 8054./1.1 Dtsign loads, Footings shal19c desigooJ for <br />the ~t Wlfa v<nblc effccu due to the combinations of <br />Il.!lQ\ spcc-i1ied in Scctioo 1605 J. The dead load mall in- <br />cJue-d the weight of foundati<ns" footings and overlying <br />till Reduced Uve loads, ., SJl':Clned In Section !6IJ7. 9. <br />Arc permjned to be U3ed in designini footinp, <br /> <br />18054 12 Vibnuory loads. Wh~ machinery opeT"ll. <br />ll~ 01 other vibratiorn II1'e tTlI1unUtted through the <br />f oundatioo, COfI.S ideratiOll &h al I be a,iven in the f oot.inE <br />des I gn to Pf'n'cnl droi.mcntal disturbanC(:3 of the soil. <br /> <br />I &0542 ~ footinp, The design, materiab and c0n- <br />struction of CCIlcrett footinp ahaJJ C<nIpJy witlJ Sectior13 <br />18054.2.1 through 1805.4.2.6 and the provisiom ofOlap- <br />!a 18Oj4.2. <br /> <br />bccption; When: 8 specific design iJ noc provided, coo- <br />Crete footings supporting walls of light-frame COOStruc- <br />Lion arc ~ to ~ d~igned in llCCQrdance with <br />TIlbJc 180542 <br /> <br />1&0542.1 Coocret.e strengIb. Coocrete in footiI1g3 <br />Shall have II spcoifiod C<IInpI'eaaive atn:ngt.h (fc) ofoot <br />Less than 2,500 pound.!! per SQuare inch (PSi)( I 7 23 7 kPa) <br />Al 28 days <br /> <br />J &05 4 2.2 Reserved. <br /> <br />SOil SAND H)l fN J JAA III lr i\ <br /> <br />J 80.5 4..2 . 3 P1JUIJ c.onc:rm fOCltinss flu edgr tIlJ cl DC>,\ <br />Of plain CXJIlCrc'U: footinp ropporting walli of atile1 tJlaJl <br />Light-fume conslructioo AhalJ not be less t.ha1 8 IDchcc- <br />(203 mm) when placed on soil <br />Exception: FOI plain C01Jcn:te footings suPpvrtlflf <br />Group R-3 occuvanc1C5 rile edic thjcbJ~ is pernJl1 <br />te-d to Ix 6 inch:::s (J 52 m!n),pr'.widcd that the [oo!Jflf <br />Docs oot cxtcnrl bcyood 8 diS'..3fICC gr~eJ ttuu the <br />Thi~ of the: footin~ ...il e1thCT ~i<k of tJl<: ~uP'JX" \e,j <br />WaJl <br />J80.5.4.2.LJ Placem~l (lfDJflCTetc Coocrctc fOOllng' <br />ShaH DOt Ix: placed through W14'J unless a trmuc Of otllCl <br /> <br />method IIpproved by the building )fficiaJ is usaJ Whcrr <br />plllC<<l und.a (W in the prulence of WiUel" the COlICre.l<: <br />shaJl be deposited by approved means to ensure nHm <br />mwn segregation of the mix and negligible turbuJe:nu '.d <br />the water. <br /> <br />1805.4.2.5 Protectioo of concrete. CoOCl'ctc footings <br />shaJ I be Protected from freezing cJ.winE depooiting I1nd 10i <br />8 peri od of not less than fi ve da)'3 thereafter W li1eT sh aJ I <br />Not Ix allowed to flow through the deposited c:oncrctc <br /> <br />1&05.4.2.6 Forming ofC<JnCret.c:. ~ footingB ILIt <br />perm.jlted to be CUI IpinJt the earth wheR, in lhe opin- <br />ion of the buiJd.ini official, soil cooditi003 do DOl rt.qlUIe <br />form1ng, Where forming Is requ1red., h shall boc In 1ICq>1. <br />dance with Olapter 6 of A Cl 3 I 8 <br /> <br />1805.4.3 Masonry-urnt footings. The design, mataiaJs <br />and construction of masonry-unit f~np shall comply <br />with Sections 1805.4.3.J Il1ld 18054.32. and the proVISIVll.' <br />Of Chapter 21 <br /> <br />ExceptiOll: Wher-c . tpecific dc6ign it DO( providod, 0J.l>. <br />sonry-unit footings supporting WIllis of Iight-fnune COIl- <br />Struction are permitted to b designed in llCCOrd.&Jcc with <br />Table 18Qj.4.2. <br /> <br />1805.43.1 DimaWooe, Masoory-unil footing ahalJ be <br />laid in Type M or S morw complying with Section <br /> <br />TABLE 1805.4.2 <br />FOOTINGS SUPPORTING WALLS OF LIGHT-fRAME CONSTRUcnONllb.c.d <br /> <br />r <br /> WIDTH OF THlCKNEss OF <br /> NUMBER OF FLOORS FOOTINGS FOOTING <br /> SUPPORTED BY THE FOOTINGS. (inches) (inches ) <br /> I 12 6 <br /> 2 15 6 I <br /> I <br /> 3 18 8 I <br />l <br /> <br />~Ol S I I mch = 25.4 rom, I fool '" 304.8 mrn. <br />11 Depth of footing! s.haJJ t>c in accordancc wi th Section I 8051. <br />b The ground under the tlOOi is permitted to be excav8ted to the eJevatioo of the top of the footing. <br />c lnterior~ walli Ire permitted to be ~ported by isolated footings. The footinB width and length EluUl ~ N.'1(~ <br />the width shown in thi! table, and footinp shall be spaced not mort thllfl 6 Feet OIl ceJter <br />d F Of lhiclcness offoundatioo walls, see Section I &0 5.5, <br />e Footings art permitted to support . roof In addrrioo to the stipulated number of floors, Footings SUppQf1mg ro,,1 l~ 11 \ <br />SbalJ be as required fOf supporting ODe floor <br />Plain COOC1tte footings fOf Group R-3 occupancies art permitted to be 6 inches thicl: <br />