318_Closure (1)

Document:ACI318:BuildingCodeRequirementsforStructuralConcreteandCommentaryPublicDiscussionPeriod:May1,2014June15,2014

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1. BrianJohnson,P.E.

00 Goingforward,pleaseusethebarforrevisionandarrowfordeletionusedinACI530.Whyareallpublicationsnotrevisedandannotatedinaconsistentfashion?

Duetothereorganization,thewholeCodewouldhaverequiredsidebars.


00 Istherenotabetterwaytodistinguishbetweenactualyieldstrengthandactualtensilestrength(i.e.fy,fu?)Ifindtheterminologyopaque.Ifnothingelse,couldthecommentaryshowahypotheticalsituationwithallthesevariablesknownandexplainthemthatway?

Theactualyieldstrengthisthemeasuredtensileyieldofthereinforcement(asopposedtothespecifiedyieldfy)whiletheactualtensilestrength(asopposedtothespecifiedtensilestrengthfu) isthemeasuredultimatetensilestrengthofthereinforcement.DefinitionsofyieldstrengthandtensilestrengthareincludedinACICT13(ACIConcreteTerminology).ItisforthisreasonthatthesetermsarenotredefinedinChapter2.

3. MarkGilligan 00 ThecommentsprovidedherearenotnecessarilyexhaustivebutarerathertheinstancesIfound.Ifinotherlocationssimilarsituationsoccurtheyshouldbetreatedsimilarily.

Thanksforthecomments.

4. AliHussein 00 Drawingsparagraphsinthecurrentcodewiththeparagraphorbesideorclosetoit,whichallowstheusertoeasilycomparethespeechcodeintheparagraphwiththedrawing,aswellasinthefollowuptoreadtheparagraphsthatfollow.Thedrawingsinthenewcodearethereattheendofeachchapter,andherethereisdifficultyinthecomparisonchartwithwordsaswellashindercontinuereadingtheparagraphsthatfollow

Asinpasteditionsofthecode,figureswillbepublishedinproximitytotheprovisionsandcommentary.

5. PeterA.Giessel 00 IngeneralIlikethereorganizationandappreciatetheadditionalefforttocoordinatethedocumentwith2015IBC.

Thanksforthecomment.

6. HelmuthWilden 00 Basedonmypreviouscomments[regardingreferences],Isuggestthattheentiredocumentbecopyeditedbyaprofessionalcopyeditor.

Thereisnoneedtochangetheequationnumberingscheme. RefertotheresponsetoComment#15.ACIhasprofessional,wellqualifiedcopyeditors.

7. DavidDeValve 00 Manyreferencestootherchaptercodeprovisionsthenbacktocurrentchap.orotherchapterswasn'tthiscodecyclemeanttoeliminatemuchofthatjumpingbackandforth?Wouldtheybehypelinkedinthedigitalversion!?(i.e.P.1047.6.4.2)

Thecodeusesatoolboxapproachinordertoavoidduplicationofmaterialthatisusedbyanumberofchapters.Thedigitalversionwillbehyperlinked.


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8. Reineck,KarlHeinz

00 Thenumberingofchaptersisfrequentlynotcorrectandnotlogical.Inthefollowingsomeexamplesaregiven.ThePublicCommenterReineckcouldnottraceallmistakesinthewholecode.Itdoesnotmakesensetonumbersection1.1.1ifno1.1.2follows.Deletesection#1.1.1.Itdoesnotmakesensetonumbersection1.7.1ifno1.7.2follows.Deletesection#1.7.1.Itdoesnotmakesensetonumbersection1.10.1ifno1.10.2follows.Deletesection1.10.1#.Itdoesnotmakesensetonumbersection2.1.1ifno2.1.2follows.Deletesection2.1.1#.Itdoesnotmakesensetonumbersection3.1.1ifno3.1.2follows.Deletesection#3.1.1.Itdoesnotmakesensetonumbersection4.1.1ifno4.1.2follows.Deletesection#4.1.1.Itdoesnotmakesensetonumbersection4.3.1ifno4.3.2follows.Deletesection#4.3.1Itdoesnotmakesensetonumbersection4.10.1.1ifno4.10.1.2follows.Deletesection#4.10.1.1Itdoesnotmakesensetonumbersection4.10.2.1ifno4.10.2.2follows.Deletesection#4.10.2.1Itdoesnotmakesensetonumbersection4.12.5.1ifno4.13.5.2follows.Deletesection#4.12.5.1.

Disagree.TheCommitteehasadoptedthefollowingsectionnumberingapproach.Eachheadinghasauniquenumber,andeachprovisionhasauniquesectionnumber.Inaddition,subsectionsareusedtoprovideprovisionsonaspecifictopic.Thenumberingcorrectlyfollowstheintendednumberingformat.


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Itdoesnotmakesensetonumbersection4.14.1ifno4.14.2follows.Deletesection#4.14.1Itdoesnotmakesensetonumbersection5.1.1ifno5.1.2follows.Deletesection#5.1.1Itdoesnotmakesensetonumbersection6.1.1ifno6.1.2follows.Deletesection#6.1.1Itdoesnotmakesensetonumbersection6.7.2.1.1if6.7.2.1.2follows.Deletesection#6.7.2.1.1.Itdoesnotmakesensetonumberasection6.8.1ifbo6.8.2follows.Delete6.8.1Generalandrenumberthefollowingsections6.8.1instead6.8.1.1etc.Itdoesnotmakesensetonumbersection7.1.1ifno7.1.2follows.Deletesection#7.1.1.Itdoesnotmakesensetonumbersection7.3.3.1ifno7.3.3.2follows.Deletesection#7.3.3.1.Itdoesnotmakesensetonumbersection7.4.2.1ifno7.4.2.2follows.Deletesection#7.4.2.1.Itdoesnotmakesensetonumbersection7.6.1.1ifno7.6.1.2follows.Deletesection#7.6.1.1.Belowsection#7.6.4.2abasicstatementisgiven,andthensect.7.6.4.2.1starts.Ifheadingswouldbeintroducedaftersectionnumbers,thisimportantstatementwouldnotappearinthelistofcontents.Thisstatementcannotpreciselyreferredtobynumber,butonlybytherulesgivenbelowsection#


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7.6.4.2andbefore7.6.4.2.1;thisisobviouslycuriousandnoteffective.Introducenewsect.7.6.4.2.1forthestatemetndirectlybelow7.6.4.2,andrenumberthefollowingsections1up,like7.6.4.2.1to7.6.4.2.2etc.Itdoesnotmakesensetonumbersection7.7.6.2.1ifno7.7.6.2.2follows.Deletesection#7.7.6.2.1.

9. TrentNagele 00 Place adetailedchaptertableofcontentsatthebeginningofeachchapter(similartoAISC).

Thanksforthesuggestion.Adetailedtableofcontentswillbeprovidedatthefrontofthedocumentasinpasteditions.

10. DavidDeValve 00

Chap.1925

IthinkChapters1925needtobeplacedearlierintheCodeasthesechaptersalldiscussdesignparametersthatareusedinthedesignofconcretestructures.MostoftheseprovisionsarealsofoundinthecontractdocumentsundertheNotesSectionusuallyatthefrontofafinalcontractdrawingset.Placeasfollows:Chapters19&24nearChapter4wheretheseparametersarebrieflyintroduced;Chapters2122beforeChapter7todefinedesignvaluesbeforeputintouseinmembersections;Chapter25nearChapter20toputreinforcingconstructiondetailsneardesigndetails;Chapter23placednearorintoChapter6orelsewhereasdeemedappropriate!?!

Significantdiscussionoccurredwithinthecommitteeregardingtheorganizationofthedocument.Theorganizationpresentedistheconsensusviewofthecommitteeandfollowsthemajororganizationasfollows:Part1General(Chapter14)Part2Analysis(Chapter56)Part3MemberDesign(Chapters714)Part4Joints,Connections,andAnchoringtoConcrete(Chapters1517)Part5SeismicDesign(Chapter18)Part6MaterialsandDurability(Chapters1920)Part7StrengthandServiceability(Chapters2124)Part8GeneralReinforcementDetails(Chapter25)Part9Construction(Chapter26)Part10ExistingStructuresEvaluation(Chapter27)

11. PeterA.Giessel 00

FAQ

OnyourportalpageFAQitsays,ArethereprovisionsinACI31808or11thatareintentionallymissinginACI31814?NoIagreewiththeomissions,butAppendixBandCareintentionallymissing(astheyshouldbe).Perhapstheportalsoverlybroadstatementcouldberevised?

Thanksforthecomment.InformationregardingtechnicalchangesmadetotheCodesuchasremovalofAppendixesBandCisprovidedintheConcreteInternationalarticlethatintroducedthepublicdiscussionperiod.ThisarticleappearedintheMay2014edition(pp1820)andisalsoavailableonthe31814portalwebsite.

12. RobertHale 00 PleaseplacetheFiguresinlinewithprovisionsandcommentary.Reason:makestexteasiertoread

Asinpasteditionsofthecode,figureswillbepublishedinproximitytotheprovisionsandcommentary.

13. Reineck,Karl 00 Thenumberingofchaptersisfrequentlynotcorrect AsdiscussedforComment#8,theCommitteehasadoptedthe


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Heinz andnotlogical.Inthefollowingsomeexamplesaregiven.ThePublicCommenterReineckcouldnottraceallmistakesinthewholecode.

followingsectionnumberingapproach.Eachheadinghasauniquenumber,andeachprovisionhasauniquesectionnumber.Inaddition,subsectionsincludeprovisionsrelatedtoaspecifictopic.Thenumberingcorrectlyfollowstheintendednumberingformat.

14. HelmuthWilden 00 Iseethattheequationnumbersseemtofollowthesectionnumbers.Ithinkthisisaseriousmistakethatwillcreateconfusionandpotentialerrorsalongtheway.ForexampleinChapter17whichisalmostAppendixDofACI31811,Eq.D2isnowEq.17.4.1.2.Thisisafourdigitnumberwhichmakesthingsverycumbersome.IcanenvisionaseminarwheninthepastthespeakerwouldsimplysayrefertoequationDdash2.Nowthepresenterwillneedtosayrefertoequationseventeenpoint4point1point2.Wow.Whydothat?Iseethesamethinginotherchapters.

SeeresponsetoComment#15.

15. HelmuthWildenWilden

Enterprises,Inc.2Marshview

DriveHiltonHead,SC

29928hwilden@roadru

nner.com

00 GeneralComment:Useofequationnumbersismuchtoocomplex.ForexampleinChapter17whichisalmostidenticaltoAppendixDofACI31811,Eq.D2ofACI31811isnowEq.17.4.1.2.Thisisafourdigitnumberwhichmakesthingsverycumbersome.IcanenvisionaseminarwheninthepastthespeakerwouldsimplysayrefertoequationDdash2.Nowthepresenterwillneedtosayrefertoequationseventeenpoint4point1point2.Wow.Whydothat?Asanengineerdoingcalculations,IoftenreferenceanACICodeequation.Usingfourdigitswillnotonlymakethattoughonengineersdoinglikewisebutalsoonthosereviewingthesecalculations.Iseethesamethinginotherchapters.

Committee318discussedtheformatofequationnumbersand,whileacknowledgingthatitismoreamatterofpersonalpreference,settledonnumbersthattiedtotheapplicableprovisionnumber.OneofthedecidingfactorswastheincreaseduseoftablesintheCode.TablesarenumberedtomatchtheapplicableCodeprovision,andmanycontainequationsthatinpreviouseditionsoftheCodewouldstandalone.Withthesystemadopted,equationsintablescanbereferencedbyprovisionandrownumber,(a),(b),(c)etc.,whichistypicallyincludedinacolumnatthefarrightofthetable.Thustheformatofequationnumbersisconsistentwhethertheequationstandsalone,orifitisincludedinatable.Althoughtheequationnumberingmayseemcumbersome,ithastheadvantagethatusingthenumbertiedtothesectionwillallowareviewertoknowwhatsectionfromthecodetheequationcanbefound.Thisisanenhancementfrompreviouscodeswhereassimpleconsecutiveorderingofequationnumbersdidnotcorrespondtoaspecificprovision.


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Onemightarguethatitiseasiertofindanequationifthenumbercoincideswiththesectionitisin.Iwouldcontendthatfindingandequationwithatwoorthreedigitnumberisjustassimplebyjustscrollingthroughthechapteritisin.Alsowithelectronicversionsbeingusedmorefrequentlyinthefuture,thefindfeatureofeitheraMicrosoftWordversionofapdffileisprettysimple.IhaveusedACI318sinceits1963editionandallsubsequentcodeshavesimplyusedthetwo(orthree)digitversion.Whychangenow?

16. BrysonAllen 00Figures&Tables

Generalformatting placeallrelevantfiguresandtableswithinthesectionsreferenced.Havingthemattheendcontradictstherevisedstructureofthe318document.

StaffwillformatdocumentaccordingtoACIstyle.Thefinalversionwillbeformattedlikepreviouseditionsofthecode.

17. JasonHerrman 0031814

All All Indentingsubsectionswillhelpreadability.Rightnowitishardtofindheadings.

StaffwillformatdocumentaccordingtoACIstyle.

18. RubinMZallen 01Chapter

1

thereismuchintheCodeinregardtothegeneralbuildingcodethatreallyiscommentaryandshouldbemovedtotheCommentarysideoromitted.Recommendedcorrectionsto1.2.2,1.2.5,R1.2.5,1.4.1,and1.4.2areareflectionofthiscomment.

Whilethismaterialmayappearrepetitious,itwasdevelopedinconjunctionwithlegalstaffbased,inpart,onpastchallengestotheCode.Thematerialwasthoroughlydebatedbythefullcommittee.

19. MarkGilligan 1.10 Approvalofspecialsystemsofdesign,construction,oralternateconstructionmaterialsisnotappropriatelyaddressedinthisstandard.ThisissueisaddressedintheIBCinageneralway.Thereisnoneedforaspecialtreatmentforconcrete.ACI318doesnotneedtoaddressalloftheprovisioninthemainbuildingcode.OnemightsuggestthatACI318istryingtohijackandrewritethegeneralprovisionsofthemodelcode.

ACI318recognizesthatthisCodemaybeadoptedinjurisdictionswheretheIBCoranothergeneralbuildingcodesisnotinforce.ThereforesomeoverlapoccurstokeeptheACICodeacompleteentity.

20. RubinMZallen 1.2.2 2nd sentence:Ittellsthejurisdictionwhattodo.The Thesecondsentencedoesnottellthejurisdictionwhattodo.It


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sentenceshouldbemovedtothebeginningofR1.2.2.Also,sentenceshouldstatewhoisdoingtheadopting.

simplypointsouthowthecodesandstandardssystemworks.Asfarastheadoptingagency,itisleftasjurisdictionsincetheadoptingagencycannotbedefinedmoreclosely.

21. MarkGilligan 1.2.4 Totallyunnecessary Itiswellestablishedinlawthatonlytheadoptedversiongoverns.

ThereareseveralversionsofACI318includingtheSIandSpanishversions.Thisprovisionisincludedtoidentifytheofficialversionandestablishgovernance.Omissioncouldimplyotherwise.

22. RubinMZallen 1.2.5 Thelasttwolines inanystructuredesigned......shouldbeomitted.WeshouldnotaddressanythingotherthantherequirementsofthisCode.

ThisprovisionhasbeenintheCodeforseveraleditionsandisintendedtoprovidethelicenseddesignprofessionalorthebuildingofficialanindicationofwheretheCodemaybeapplicable.

23. RubinMZallen R1.2.5 Omitthissection:repetitiousof1.2.5aftermoving,andexceedingtheseminimumrequirementsisnotaviolationoftheCode.to1.2.5

ThecommentaryrepeatstheintentoftheCodeonlytoclarifyexceedingCoderequirementsispermissible.Asaclarifyingstatement,itneednotbepartofthemandatoryCoderequirements.

24. MohamedNasserDarwish

1.2.5 2 3 ..inanystructure...Reason: Does this include special structures ifcoveredbyageneralbuildingcodeproposedaction:Clarificationmaybeneeded

Anystructureisintendedtocoverspecialstructuresasdefinedinthegeneralbuildingcode.

25. MarkGilligan 1.2.7 DeleteorrestateIfnogeneralbuildingcodeisadoptedthisCodereflectsACIsrecommendationsregardingminimumrequirements..Ifthereisnoadoptedbuildingcodeitcannotprovideminimumrequirements.Moreappropriateinnonmandatoryportionofthestandardsuchasprefaceorcommentary.

TherearejurisdictionsthatadoptACI318butnotageneralbuildingcode.ThisstatementmakesitclearthatstructuralsafetyisprovidedbythisCodeshouldtheCodebeadoptedindependently.

26. MohamedNasserDarwish

1.3.1 ...publichealthReason:seemsflow,mayneedtobemoredeterministicproposedaction:Reconsiderationrequired

Publichealth isincludedinmanygeneralbuildingcodesandisassociatedwithoverallstructuralsafety.Amoredeterministicresponsewouldtendtolimittheintent.

27. RubinMZallen 1.4.1 Thissectionissimilarto1.2.2;itshouldbedeletedandreplacedwith:

Whilebuildings aretheprimaryobjectiveoftheCode,318feelsthatlimitingtheCodetojustbuildingsratherthanconcretestructuresmayresultinanunintendedlimitation.


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ThisCodeshallapplytoconcretebuildingsorstructureswithstructuralsystemssimilartothatofbuildings.

28. MarkGilligan 1.4.2 Ifthebuildingcodedoesnotgovernatypeofbuildingareferencestandardcannotaccomplishthat.Fromaregulatorypointofviewthisprovisionisirrelevant.Suggestsections1.2.4,1.2.7,and1.4.2beaddressedinaprefacetotheformalcode.

PracticinglicenseddesignprofessionalsoftenuseACI318orportionsofACI318forstructuresotherthanbuildings.Thissectionistoestablishalegalframeworkforsuchactions.

29. RubinMZallen 1.4.2 Replacethegeneralbuildingcode.attheendbythisCode.

TheintentofthestatementistoaddresstheapplicabilityofACI318asstated.

30. MarkGilligan 1.4.6 ACI543RandACI336.3RarenotadoptedbytheIBCthustheIBCprovidesnorequirementsforthedesignandconstructionoftheseelements.Someinterpretationsofthecodecouldcontendthatthesedeepfoundationselementsarethusnotallowed.WearedealingwithanACIturfissue.ACI336.3RessentiallyendorsedtheprovisionsofACI318soitdoesnotmakesensetoexcludetheseelements?WhileACI543Rdoesmakesomeadditionalrecommendationsitshouldbenotedthatdrilledpiersandconcretepilesareofteninstalledinthesamematerialsusingthesameinstallationtechniquesthusitisunclearwhytheconcreterequirementsshouldbeanydifferent.Thereisevenlessreasonwhythecapacitiesoftheseconcretesectionsshouldbeevaluatedanydifferently.IfACI318isapplicabletostructuresassignedtoSDCD,E,andFwhywouldthiscodenotbeapplicabletothesamestructureinalesserSDC?ThusitisrecommendedthatSection1.4.6bedeleted.

ThisexclusionhasbeenintheCodeforseveraleditions.ACI318isworkingonupdatingthefoundationschaptertoprovidebetterguidanceforallconditions.CertainlytheprovisionsforSDCD,E,andFcanbeusedinlessercategories;however,theymaybeexcessive.Aswrittenthelicenseddesignprofessionalisfreetomakethatjudgment.TheCommitteeisworkingonupdatingtheFoundationschapter.

31. JamesS.Lai 1.4.6 4 Pleaseconsideraddinganotheritemtoeffect Aswrittensection1.4.6aaddressesalllateralloads,including


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applicationtodesignforwindresistanceinhighwindregions

wind.1.4.6.brefersonlytospecificrequirementsforseismicdesigncategories.Thereisnoneedatpresentforaseparatewindcategory.

32. MiroslavVejvoda

R1.4.7 Revisereferencetoread:ThePostTensioningInstitute(2012)providesstandardrequirementsforposttensionedslabongroundfoundations,soilinvestigation,design,andanalysisofposttensionedresidentialandlightcommercialslabsonexpansivesoils.

Reviseasnoted:ThePostTensioningInstitute(2012)providesrecommendationsforsoilinvestigation,geotechnicalandstructuralanalysis,anddesignofposttensionedslabongroundfoundationsforresidentialandlightcommercialbuildingsonexpansivesoils.

33. RubinMZallen 1.5.3 Move1st sentencetoCommentarysidetoR1.5.3. Aswritten,thefirstsentenceformallydefineswhatconstitutesCommentaryanditshouldnotbemoved.

34. MarkGilligan 1.6.2 Delete.Itisperfectlyclearthatinterpretationsofalocaljurisdictiondonotimpactotherjurisdictions.Itisalsoclearthatbuildingofficialcannotchangethecodeasitappliestohisjurisdictionwithoutactionbytheappropriatelegislativebody.NotethatjustbecauseonewrongheadedindividualpromotedaninterpretationthatisWRONGdoesnotmeanthatoneneedstochangethestandard.Youcannotaddressallofthecrazythingspeoplewilldo.Suchprovisionsonlyconfusethosewhotrytousethestandard.

ThiscommentiscorrectandisexactlywhytheprovisionisincludedintheCode.Unfortunatelywhatisperfectlycleartooneindividualisnotsocleartoothers.

35. JamesS.Lai 1.6.2 6 ReplaceBuildingOfficialwithAuthorityHavingJurisdictioninordertoaccountforenforcementagenciesthatdonothaveassignedbuildingofficial.Seecommentonsection2.2.

ThedefinitionofBuildingOfficialhasbeenrevisedtoreflecttheauthorityhavingjurisdiction

36. JamesS.Lai R1.6.2 6 Thisstatementlimitstherightofauthorityhavingjurisdictiontoamendthiscodebasedonlocalclimaticandgeologicalconditions.Aswritten,theusuallyunenforceablecommentarysentenceisargumentativeanddoesnotreflecttheprovision1.6.2.ThecommentarysentencetendstoimplynoexceptioncanbetakenonACI318provision(s)eventhroughstateBuildingStandard

Section1.6.2statesthatlocalchangestothecoderemainlocalsuchthatachangeinonejurisdictiondoesnotapplyinotherjurisdictions.GlobalchangestotheCodearetheresponsibilityofACI,sometimesinresponsetolocalexceptions.ThisprovisionwasreviewedbyACIlegalcounsel.


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Commissionisempoweredtoamendmodelcodes;andlocaljurisdictionsneedtoenactlocalordinancetoadoptstatecodeswithamendmentswhicharedeemednecessary.Deletethecommentarysentenceintotalwithoutsubstitution.Theprovisionrequiresnocommentary.

37. MarkGilligan 1.6.3 Delete.ThisisaddressedinthegeneralprovisionsoftheIBC.Itisnottheroleofareferencestandardtorestateorchangetheprovisionsintheadoptedbuildingcode.Evenwhenrequirementsarerestatedtheyareinevitablysomewhatdifferentfromtheprovisionsintheadoptedbuildingcodeandthuscreateconfusionandconflicts.HasACIadoptedapolicythatitintendstousurptheroleofthebuildingcode.Ifnotthenremovetheseprovisions.IfyesthenbehonestaboutitsothattheauthorsoftheIBCandotherreferencestandardscanconsidertheneedtotakeaction.Ifyespleasesendmeacopyofthepolicy.

ACI318recognizesthatthisCodemaybeadoptedinjurisdictionswheretheIBCoranothergeneralbuildingcodesisnotinforce.ThereforesomeoverlapoccurstokeeptheACICodeacompleteentity.HistoricallyACIhasworkedwithIBCtoreduceoreliminateexceptionstoallowIBCandothergeneralbuildingcodestoconcentrateonotherlifesafetyissues.

38. MarkGilligan 1.7 Thisstandardshouldnotattempttodefinerolesofthevariousparties.Thisstandardhasalreadyestablishedthatitisnottheintenttodefinemeansandmethodsthuswhyspecifydetailedrequirementsforthedesignprofessional.Suggestthattherelevantissuescanbeaddressedbyfocusingontheendresult.Seecommentrelatedtosection1.8.1.WhenthisCodeattemptstodefinetheactionsofthedesignprofessionalitrunstheriskofattemptingtoregulatethepracticeofengineeringorarchitecture.Inmanyifnotallstatestheregulationofdesignprofessionalsareassignedtostateagenciesthatare

ThisCodeiswrittenforthelicenseddesignprofessional.Toavoidconfusion,thelicenseddesignprofessionalmustbeidentified.


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differentfromtheagenciesorlocaljurisdictionsthathavetheauthoritytoadoptbuildingregulations.Thusthebuildingcodeanditsreferencedstandardsdonothavetheauthoritytoregulatethepracticeofdesignprofessionals.

39. JonB.Ardahl 1.8 DeletethetermConstructionDocumentsandreplacewiththetermContractDocumentsintheentiredocument.ThetermContractDocumentsisthecommontermusedthroughouttheconstructionindustryconcerningdocumentsthatthecontractorreceivesandmustcomplywithwhenconstructingaproject.ThischangemustalsobemadetoagreewithACICT,theTCM,andtheproposedACI314.214.Thereisnoneedtodefineanewtermwhenthereisalreadyanacceptableterminusebytheconstructionindustry.

Mr.Ardahliscorrectthatcontractdocumentsisinwideuse.Contractdocumentsalsoincludebidbond,warranties,workassignments,anditemsthat318doesnotaddress.ACICommittee318feelsthenewnomenclatureisjustifiedtodefinethescope.IBCalsomakesthisdistinctionbyusingconstructiondocuments.

40. MarkGilligan 1.8.1 Ratherthatreferringtothelicenseddesignprofessionalsuggestaltlanguage:TheconstructiondocumentsshallcontaintheinformationrequiredinChapter26.SeelatercommentsregardingChapter26.Itisnotnecessarytosay;andthatrequiredbythejurisdiction.Firstthebuildingofficialcanonlyrequirethatisrequiredbythecodeandasaresultthisstandardcannotgivehimmoreauthority.SecondthisisthesortofissuethatshouldbeaddressedintheBuildingcodenotinareferencestandard.Considerhowconfusingthingswouldbeifeveryreferencestandardattemptedtorestateormodifythebuildingcode..

The2014versionofACI318wasspecificallywrittentothelicenseddesignprofessional.HistoricallysomelicenseddesignprofessionalsfeltthattheactionsnowinChapter26weretobedeterminedbythecontractor.Thisstatementclarifiesinformationthatthelicenseddesignprofessionalmustprovidetothecontractor.Addingthelocaljurisdictionprovidescompleteness.

41. MarkGilligan 1.8.2 Thefirstsentenceisredundant,andshouldbe ACI318recognizesthatthisCodemaybeadoptedinjurisdictions


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deleted,sincethisissueisageneraloneaddressedintheIBC.Suggestthattheremainderofthesectionisnotneededsincethebuildingcodeaddressestheneedtospecifycalculationswithoutbeingspecific.Whyisthisissueuniquetoconcrete?WhydidthecommitteemembersproposethisasachangetotheIBCorASCE7?

wheretheIBCoranothergeneralbuildingcodesisnotinforce.ThereforesomeoverlapoccurstokeeptheACICodeacompleteentityincludingtherequirementforcertaincalculations.


R1.8.2 7 ArethereferencestomodelanalysissupposedtobeModalanalysis?3x

Somestructures,thinshellsforinstance,usemodelstovalidatethedesignandthemodelsarepartofthedesigndevelopment.Thestatementdoesnotrefertomodalanalysis.


2.2 12 7 In2008,c2 isalsousedinChapter21,butisnotnotedonthispage.

c2appearsin18.6.2.1(oldchapter21)andisconsistentwiththedefinitiononline7ofpage12.

44. Rodriguez,M.E.,andRestrepo,J.I.

2.2 15 31 ThedefinitionofMpr shouldread:Mpr =probableflexuralstrengthofmembers,withorwithoutaxialload,determinedusingthepropertiesofthememberatjointfacesassumingatensilestressinthelongitudinalbarsofatleast1.25fy,theprobablecompressivestrengthofconcrete,andastrengthreductionfactor,,of1.0,in.lbThis clause recommends using an expected yieldstrengthof1.25fy for thereinforcement,and tacitly,thespecifiedconcretestrengthfctocalculateMpr.Atfirst hand this recommendationmakes inconsistentuseof thestrengths inasection. Furthermore,andmore importantly, isthefactthat inallcompressivecontrolled sections and in sections in the transitionregion,theuseofthespecifiedconcretestrengthcanresult in flexural strengths that are lower than theprobable flexural strengths. Such difference canimpactthedemandsincapacitydesignedelements.Thediscussers suggest reviewing thepublicationby

Acceptthiscommentasnewbusiness.


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RestrepoandRodriguez,(2013).There,authorshaveproposed an equation for calculating the probableflexural strength of RC columns. Although theinclusionofanequation suchas thosepresented inthispaperwillnotcoverallpracticalcases,itcangivean idea on how to compute the probable flexuralstrengthofsectionsofcolumnsandalsoinwalls.Restrepo J.I., Rodriguez, M.E., (2013), On theProbableMoment Strength of Reinforced ConcreteColumns, JulyAugust 2013, Structural Journal delAmericanConcreteInstitute,681690.

45. JamesS.Lai 2.2 24 InlieuofBuildingOfficial,IstronglysuggestthatweusethetermAuthorityhavingJurisdictiontheorganization,politicalsubdivision,office,orindividualchargedwiththeresponsibilityofadministeringandenforcingtheprovisionsofthiscode.SomeStateagencies,suchasinStateofCaliforniaDivisionofStateArchitects,donothavebuildingofficial.ThisdefinedterminACI318wouldbeofnomeaningandsuperfluous.

ThedefinitionofBuildingOfficialhasbeenrevisedasfollows:buildingofficialTermusedtoidentifytheAuthorityhavingjurisdictionorindividualchargedwithadministrationandenforcementofprovisionsofthebuildingcode.Suchtermsasbuildingcommissionerorbuildinginspectorarevariationsofthetitle,andthetermbuildingofficialasusedinthisCode,isintendedtoincludethosevariations,aswellasothersthatareusedinthesamesense.

46. JianZhao 2.3 23 33 Replacethecommabetweenundercutandanchorswithaspace

Accept.Anchorinstalledinhardenedconcrete;adhesive,expansion,andundercutanchorsareexamplesofpostinstalledanchors.(deleteextracommaafterundercut)

47. JianZhao 2.3 24 1 Pleasespecifythe"loads"heretorepresentspecificallytensileloads.Theshearloadtransferisthroughbearingbetweentheanchorshaftandtheconcrete

Theshearstrength(e.g.,pryout)isalsodependentonbondstrength.

48. JianZhao 2.3 24 10 "suchthattheprotectedareasoverlap"shouldread"suchthatthehorizontalprojectedareas(fortension)and/ortheverticalprojectedareas(forshear)overlap."

Fixtypo:suchthattheprotected projected areasoverlap.

49. JianZhao 2.3 24 11 Thisdefinitionisnotnecessary.Otherwisethedefinitionofthestrengthcorrespondingtoother

The expression pullout(17.4.3),asdistinctfrom bondfailure(17.4.5),requiresexplanation.


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failuremodessuchasbreakoutandsidefaceblowoutisneeded

50. MarkGilligan 2.3 24 35 Definitionofbuildingofficialisunneededandinappropriatesinceitisdefinedinthemodelcode.Includingthisdefinitioncanonlyresultinconflictsandconfusion.Thedefinitioninthemodelcodewouldgovernandthetermisirrelevantifthereisnoformallyadoptedbuildingcode.

ACI318recognizesthatthisCodemaybeadoptedinjurisdictionswheretheIBCoranothergeneralbuildingcodisnotinforce.ThereforesomeoverlapoccurstokeeptheACICodeacompleteentity.

51. GregMoody 2.3 25 Doeshighearlystrengthconcreteneedtobedefined?

HighearlystrengthconcreteisdefinedinACIsConcreteTerminologystandardandtheCommitteedetermineditdoesnotneedtoberepeatedinACI318.

52. GregMoody 2.3 25 24 Itappearsthattheequilibriumrequirementisfortheaggregate.Thewordandismissing.MayIsuggestConcretecontaininglightweightaggregateandwhichhasan

Makeaneditorialcorrectionto31811definitionConcrete,lightweightConcretecontaininglightweightaggregateandhavinganequilibriumdensity,asdeterminedbyASTMC567,between90and115lb/ft3.

53. JuanPabloCovarrubias

2.3Terminol

ogy

25 1011

ItsaysPortlandcementoranyotherhydrauliccementanditshouldsaycementitiuosmaterialasdefinedinpage25lines3to5

Lines2021EditorialchangetoreplacehydraulicCementwithcementitiousmaterial.concreteMixtureofportlandcementoranyotherhydrauliccementcementitiousmaterial,fineaggregate,coarseaggregate,andwater,withorwithoutadmixtures.

54. JonB.Ardahl 2.3 26 18 DeletethedefinitionforconstructiondocumentsandreplacewiththedefinitionforContractDocumentsthatisinACTCTandTCM.[Seecomment1]

Mr.Ardahliscorrectthatcontractdocumentsisinwideuse.Contractdocumentsalsoincludebidbond,warranties,workassignments,anditemsthat318doesnotaddress.318feelsthenewnomenclatureisjustifiedtodefinethescope.IBCalsomakesthisdistinction.


2.3 27 17 Fivepercentfractileisnotcorrectlydefined.Confidenceintervalandprobabilityoffailurearenotinterchangeableterms.

Thedefinitioniscorrectaspresentedandisconsistentwiththe1997HiltireportANCHORPERFORMANCEANDTHE5%FRACTILEByRichardE.Wollmershauser,P.E.


2.3 28 PleaseadddefinitionofHookvs.seismichook. AhookisacommontermdefinedintheACIConcreteTerminologyandnotrepeatedintheCode.Technicaldetailsofhooksandseismichooksareprovidedin25.3.Theadditionordeletionofterminologywillbetakenupasnewbusiness.


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2.3 28 17 licenseddesignprofessional Anindividualwhoislicensedtopracticecivilorstructuraldesignengineeringasdefinedbythestatutoryrequirementsoftheprofessionallicensinglawsofthestateorjurisdictioninwhichtheprojectistobeconstructed,andwhoisinresponsiblechargeofthestructuraldesign

Acceptingthecommentchangestheintentofthecode.Insomejurisdictionsotherprofessionalsmaypreparethestructuraldesign.Ifacivilengineerislicensedtopracticestructuraldesign,thecurrentwordingiscomplete.

58. AttilaBeres 2.3 28 2 Aclosedtieshallnotbemadeupofinterlockingheadedreinforcingbars.Thisexclusionisvoidofcontext.Furthermore,crosstiesareoftenreplacedbydeformedbarswithheadsatbothends.Thisapplicationisnotmentioned.Pleaseprovideguidance,atleastinthecommentary(preferablywithreferences)thatexplainthesubstantiation/exclusionofsucharrangements,orarticulateanyconcerns.

Anidenticalcommentwasreceivedinreferenceto25.7.4(seeCommentbyDr.Bereson25.7.4.2).Indefinitionofhoop,changereferencefromChapter18to25.7.4.hoopClosedtieorcontinuouslywoundtie,madeupofoneorseveralreinforcementelements,eachhavingseismichooksatbothends.Aclosedtieshallnotbemadeupofinterlockingheadeddeformedbars.Chapter18See25.7.4.

59. JonB.Ardahl 2.3 28 17 RevisethedefinitionforlicenseddesignprofessionaltoagreewiththeACICT.

SeeresponsetocommentbyMr.BrianJohnsonconcerninglicenseddesignprofessional.

60. MarkGilligan 2.3 29 4 ThisstandardhasadistortedunderstandingofManufacturersPrintedInstallationInstructions(MPII)andinappropriatelyusesthetermwithrespecttomechanicalanchors.MPIIisadocumentthatisdefinedinACI355.4thatasapartoftheprocessofqualifyinganadhesive,setsforththeinstallationinstructionstobeused.MPIIisnotmentionedinACI355.2whichappliestomechanicalpostinstalledanchors.Thereisadoctrine(nondelegationdoctrine)inlawthatsaysthatthelegislaturecannotdelegatethewritingoflawsorregulationstoprivateentities.ForthispurposetheBuildingStandardsCommissioninCaliforniaorlocaljurisdictionsareconsideredlegislativebodies.Thebuildingofficialcannotfillthis

TheCommitteedisagreesthatthisstandardhasa distortedunderstandingofManufacturersPrintedInstallationInstructions.Modifydefinitionin2.3asfollows:Publishedinstructionsforthecorrectinstallationoftheanadhesiveanchorunderallcoveredinstallationconditionsassuppliedintheproductpackaging.Modify17.8.1asfollows:Anchorsshallbeinstalledbyqualifiedpersonnelinaccordancewiththeconstruction documentsand,whereapplicable,manufacturersinstructions.TheconstructiondocumentsshallrequireinstallationofpostinstalledadhesiveanchorsinaccordancewiththeManufacturersPrintedInstallationInstructions(MPII).Installationofadhesiveanchorsshallbeperformedbypersonneltrainedtoinstalladhesiveanchors.ModifyR17.8.1asfollows:Inspectionisparticularlyimportantforpostinstalledanchorstomakecertainthatthemanufacturersrecommendedinstallationprocedure,andinthecaseofadhesiveanchors,printedinstallationinstructions(MPII)arefollowed.For


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role.Thefactthatthemodelcodesarewrittenbyprivateentitiesiscuredwhenthelegislativebodyadoptstheregulations.Thelegislativebodyhastoadoptthespecificlanguageofanyregulationsandcannotdelegatethedutytoanonlegislativebodysuchasaproductmanufacturer.Thismakesitimpossibleforthegovernmenttoadoptafutureversionofastandardbeforeithasbeenfinalized.Theproblemisthatwhenthemanufacturercreatesinstallationinstructionswhichbecomecoderequirementsbutwhichhavenotbeenapprovedbytheappropriatelegislativebodytheserequirementsareinconflictwiththenondelegationdoctrine.InthecaseofadhesiveanchorsACI355.4,arguablygetsaroundthisbysuggestingthattheMPIIfollowedduringthequalificationprocessdocumentslimitationsonthequalificationoftheadhesiveanchors.TheMPIIistiedtothequalificationreportandcannotbemodifiedwithoutrequalifyingtheanchors.Inthecaseofmechanicalanchors(ACI355.2)anMPIIisnotaformalpartofthequalificationprocessandthemanufacturercouldmodifyorcreateanMPIIatanytimebypassingthemandatorylegislativeoversight..ThismodifiedMPIIcouldcontainprovisionsthatarelessrestrictivethanusedinthequalificationprocessyetthespecialinspectorswouldbecompelledtofindtheinstalledanchorsacceptable.Thiseffectivelyallowsthemanufacturertowritebuildingregulationsthatarenotapprovedbytherelevantlegislativebody.

adhesiveanchors,continuousmonitoringofinstallationsbyqualifiedinspectorsisrecommendedtoensurerequiredinstallationproceduresarefollowed.PostinstalledanchorstrengthanddeformationcapacityareassessedbyacceptancetestingunderACI355.2orACI355.4.Thesetestsarecarriedoutassuminginstallationinaccordancewiththemanufacturersrecommendedprocedures(inthecaseofadhesiveanchors,theMPII).GrossdeviationsfromtheACI355.2orACI355.4acceptancetestingresultscouldoccurifanchorcomponentsarealtered,orifanchorinstallationcriteriaorproceduresvaryfromthosespecifiedintheMPII.Modify26.7.2a.asfollows:(a)Postinstalledanchorsshallbeinstalledinaccordancewithmanufacturersinstructions.PostinstalledadhesiveanchorsshallbeinstalledinaccordancewiththeManufacturersPrintedInstallationInstructions(MPII).ModifyR26.7.2asfollows:(a)TheManufacturersPrintedInstallationInstructions(MPII)containsallrelevantinformationfortheproperinstallationofpostinstalledadhesiveanchors.Otherinformationmaybeapplicableforspecificcases.Foradhesiveanchors,applicationdependentrequirementsforqualificationofinstallersandinspectionrequirementsmayapply.Referenceismadetomanufacturerrequirements,e.g.,inR.20.3.2.6.2(fortendonlossnumbers)andR.25.4.8(certificationofstrandbondcharacteristics).


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Itisimportanttodifferentiatebetweenwhatmaybegoodtechnicalpractice,suchascomplyingwithmanufacturersinstallationinstructions,andwhatthebuildingcodecanlegallyrequire.Buildingcodescannotsolveallproblemsassociatedwiththeconstructionprocess.AsaresulttheprovisionsinthestandardshouldnotrequirecompliancewithanMPIIformechanicalanchorssuchasisdoneinSections17.8.1and26.7.2(a)

61. JianZhao 2.3 30 11 "fulldesignload"inthedefinitionofanchorreinforcementisvague.Thefulldesignloadcancorrespondtoconcretebreakout.Thedefinitionmayread"reinforcementdesignedtoensureanchorstodeveloptheirfulltensile/shearcapacities."

Revisedefinitionsin2.3asfollows:reinforcement,anchorReinforcementusedtotransferthefulldesignloadfromtheanchorsintothestructuralmember.reinforcement,supplementaryReinforcementthatactstorestrainthepotentialconcretebreakout,butisnotdesignedtotransferthefulldesignloadfromtheanchorsintothestructuralmember.

62. MiroslavVejvoda

2.3 30 12 Revisedefinitiontoread:reinforcement,bondedprestressedPretensionedreinforcementorprestressedposttensionedreinforcementinabondedtendon.

ThischangewaspreviouslydiscussedbySubcommitteeGanditwasdecidedtoleaveprestressedreinforcementasis.Prestressedreinforcementcanbepretensionedorposttensionedanditispossiblethatreinforcementcouldbepretensionedinaductandthenbondedwithgrout.

63. MiroslavVejvoda

2.3 30 16 Insertmissingdefinition:reinforcement,unbondedprestressedPosttensionedreinforcementinanunbondedtendonorexternaltendon.

Theproposeddefinitionisincorrectandunnecessary.Itisnotuncommonforpretensionedreinforcementtobebondedonlyattheendsandunbondedfortheremainderofthememberlength.Thedefinitionofunbondedtendonreasonablydefinesunbondedprestressedreinforcement.

64. MarkWCunningham

2.3 31 17 Re.Refertotie.Thisseemstoimplythatstirrupsandtiesarethesameandperhapseveninterchangeable.In31811itwasSeealsoTie.thisisbetterinthatitdoesntimplytheyarethesame.

Revisetextasfollows:Referto Seealsotie.Alsochangeatotherappropriatesectionsincludingpg.29line23,etc.:refertoseealsotwowayconstruction.

65. MarkW 2.3 32 19 Thedefinitionoftieisnotclear:(a)Loopof Agree,willaddresspartofthiscommentasnewbusiness.


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Cunningham reinforcingbarorwireenclosinglongitudinalreinforcement;acontinuouslywoundbarorwireintheformofacircle,rectangle,orotherpolygonshapewithoutreentrantcornersisacceptable.Eachdefinitionimpliesasinglebarorwireinaclosedconfiguration.However,crosstiesandcapties(31814,Fig.R9.7.7.1)donotmeetthisdefinition.Also,thedefinitiondoesntaddressconfigurationsofclosedtiesmadeupofmultipleties.Also,isacceptableshouldberemovedsincethisisadefinition,notaspecification.Re.refertostirruporhoop.Thisseemstoimplythatstirrups,tiesandhoopsarethesameandperhapseveninterchangeable.IsuggestchangingtoSeealsostirrup,hoop.

LoopofreinforcingbarorwireterminologyhasbeeninACI31811.Asnewbusiness,ACICommittee318willconsiderrevisionofthisterminologytoaddressthatitcouldbemadeofmultiplepieces(e.g.,twooverlappingrectangles).5ForACI31814,providefollowingeditorialchangestodefinitionofForACI31814,providefollowingeditorialchangestodefinitionoftieasfollows:tie(a)Loopofreinforcingbarorwireenclosinglongitudinalreinforcement;acontinuouslywoundtransversebarorwire,intheformofacircle,rectangle,orotherpolygonpolygonalshape,withoutreentrantcornersenclosinglongitudinalreinforcementisacceptable;refertoseealsostirrup,orhoop.;or(b)tTensionelementinastrutandtiemodel.

66. JianZhao 2.3 35 16 TheeffectiveembedmentdepthsforavarietyofanchorsareshowninFig.R2.1.Meanwhile,itisdesiredtospecifytheeffectiveembedmentdepthsinFig.R2.3bforsleevetypeconstructiononPage37.Forthispurpose,ACI318mayneedtolimittheapplicationtocastinanchorsinthedefinitionof"stretchlength."

Fig.R2.3wastheincorrectreference.ThereferenceshouldhavebeentoFig.R2.1.effectiveembedmentdepthEffectiveembedmentdepthsforavarietyofanchortypesareshowninFig.R2.3Fig.R2.1.

67. JianZhao 2.3 36 9 Removethespaceafter"theCode." ACIstaffwillfixduringlayout.68. RubinMZallen 3.2.1 ThetableheadingArticledesignationshouldread

Articledesignationofreferencedstandard.Itisnotclearatfirstglancethatistheintendedmeaning.

Section3.2istitledReferencedstandards.TheCommitteedoesnotfeelthatrepetitionofthesectiontitleisneededineachsubsection.Nochange.

69. MarkGilligan 3.2.2 DeletereferencetoACI374.1andACIITG5.ACI374.105isimproperlybeingusedtointroducenewstructuralsystemsforresistingseismicforcesintothebuildingcode.TheacceptabilityofnewsystemsisarolethatASCE7fills.Itappearsthatthe

ACIITGT1.1,thepredecessortoACI374.1,wasadoptedintoACI31802.ACIITG5.1wasadoptedintoACI31808sothatforACI31814therearenotechnicalchangeswithregardtothesedocuments.Aprovisionwithwordingcomparableto18.2.17hasbeenpartof


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methodologyinACI374.1isatoddswiththemethodologythathasbeenadoptedbyBSSCandASCE7.ACIITG5.107raisesthesameconcernsasACI374.1.ThiscouldbeinterpretedasanattemptbyACItotakeanendrunaroundASCE7.

theACI318seismicprovisionssincethoseprovisionswerefirstintroducedinACI31871.Section18.2.1.7isneededbecausetheprescriptiverequirementsforreinforcedconcretestructuralsystemsinChapter18maynotcoverallsystemsthatmeettheintentofthespecialstructuralsystemsassignedseismicdesignparametersinTable12.21ofASCE7.ACI374.1andACIITG5.1definetheminimumexperimentalevidence,additionaltodesignprocedures,thatmustbeprovidedforspecialstructuralmomentframeandspecialstructuralwallsystems,respectively,tosatisfy18.2.1.7andforwhichitisappropriatetousetheseismicdesignparametersofTable12.21ofASCE7.TheexistenceofACI374.1andACIITG5.1isnotatoddswiththemethodologiesfordefiningthelateralforceresistingcharacteristicsofstructuralsystemsasadoptedbyBSSCandASCE7.ACI374.1wasfirstpublishedasACIITGT1.1in1999andwascitedasreferencestandardACIITGT1.101fordefiningtherequiredperformanceofspecialreinforcedconcretestructuralframesystemsinSec.9.1.2,developedbytheBSSC,andpublishedasNEHRP450(2003).ThecontentsofACIITG5.1werepublishedasSec.9.6inNEHRP450anddefinedtherequiredperformanceforspecialstructuralwallsystems.AjointcommitteeoftheBSSCandoftheSeismicSafetySubcommitteeforASCE705consideredthemeritofincludingthoseprovisionsinASCE705.TheyconcludedthatwithbothdocumentswerebeingreferencedinACI31805,therewasnoneedtoincludetheminASCE705becausethatdocumentwasadoptingACI31805.

70. MiroslavVejvoda

3.2.2 Referencethemostrecentdocument,ACI423.714,SpecificationforUnbondedSingleStrandTendonMaterials.ThisisespeciallyimportantasthisrevisionofthespecificationrequiresencapsulatedtendonsforallapplicationsthataregovernedbyACI318.Thisisahugestepforwardinensuringdurabilityofthe

InTable3.2.2,changeACI423.707toACI423.714.


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posttensioningsystemsanditshouldbeimplementedimmediately.

71. RubinMZallen 3.2.3 ThetableheadingSectiondesignationshouldreadSectiondesignationofstandard.

Section3.2istitledReferencedstandards.TheCommitteedoesnotfeelthatrepetitionofthesectiontitleisneededineachsubsection.Nochange.

72. RubinMZallen 3.2.4 R4.4.1 ThetermsmemberandstructuralmemberarenotdefinedinChapter2;theyaredefinedsomewhatinthelastsentenceofthe1stparagraphofR4.4.1.Thedefinitionisambiguous,andsuchdefinitionshouldbeontheCodeside.Seecommentfor4.4.1.

DisagreeasdiscussedintheresponsetothecommentonCodeSection4.4.1.

73. AttilaBeres 3.2.4 40 midpage

ThislistingreferencesanearlierversionofASTM970(2012)versusthesimilarreferenceonpage689tothe2013version.Thecurrenteditionis2013a.

Thereferencein3.2.4willbeupdatedtoASTMA97013atobecompatiblewiththatunderReferences

74. DavidMcDonald 3.2.4 40 AllASTMstandardsshouldbebroughtuptodate.ASTMA775bisnotASTM775b(2014).ChangesalsotoA615,706

Thankyou.ThisisACI318standardprocedure.ThelastupdateofreferencedstandardsisdoneasoftheclosingofthePublicdiscussion.

75. DavidDeValve 3.2.4 40,689

ShouldthesameyearASTMstand.bereferencedA106413(689)vs.A106412(40)?

Thereferencein3.2.4willbeupdatedtoASTMA106413tobecompatiblewiththatunderReferences

76. RubinMZallen 4.4.1 Attheendofthissectionaddthefollowingparagraph:Thetermmembershallincludeastructuralmember,structuraljoint,orstructuralconnection,asthecontextallows.

AlthoughthisCodeisorganizedintopartsthatdistinguishmembers,connections,andjoints,thewritersofthisCodeexpectthatusersofthisCodewillhavetheexperienceandknowledgetounderstandthecontextinwhichthewordmemberisbeingused.Incasethereisconfusion,thewritershavestatedintheCommentarythatthewordmembermaymeanmember,joint,orconnection.Itseemsunnecessarytoexplicitlydelineatemembers,connections,andjointsineveryinstanceinthischapter.


4.4.1 44 Astructuralsystemcomprises thesemembers(thepartscomprisethewhole),betteristhatastructuralsystemiscomposedofthesemembers

AlthoughtheCodeiswrittenconsideringthatastructuralsystemiscomposedofthesemembersitisgenerallyacceptedthatthepartscomposethewhole,andthewholecomprisestheparts.Therefore,thewordingisacceptableasis.

78. MarkGilligan 4.4.3 Deletefortworeasons.Firstaspercommentrelatedtosection1.10thisisnotamatterforthisstandard.SecondlyifSection1.10isretainedthisisredundant.

Chapter4hasnotpreviouslybeeninACI318,anditisdeemedimportant,oncethestructuralsystemhasbeendefined,tonoteherethatalternativesystemsarepermitted.ThisisnotdeemedtoberedundantwithSection1.10becauseitreferstheuserbackto


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Section1.10.79. RubinMZallen R4.4.5 Substitutethefollowingforthe1stsentenceofthe

2ndparagraph: Ageotechnicalengineershouldmakeadeterminationofdifferentialsettlementwhereastructureisunderlainbycompressibleorexpansivesoil.Thesettlementsodeterminedshouldbeconsideredinthestructuraldesign.(Aswrittenpresently,the1stsentenceisambiguous).

ItisnotthepurposeofthisCodetoprovideinstructionstothegeotechnicalengineer.However,repetitionoftheconceptofconsiderationisnotdesiredgrammatically.Therefore,changethefirstsentenceofthesecondparagraphofR4.4.5asfollows:ExplicitconsiderationofdDifferentialsettlementorheaveisordinarilyshouldmaybeanimportantconsiderationconsideredexplicitlyindesign.onlywhenspecificcriteriaareprovidedbythegeotechnicalengineerorwhenexistingsoilconditionsdictatetheirconsideration.

80. JamesS.Lai R4.4.5 45 2 Insertthewordspansothat1st sentencewillread:Theeffects..inlongspanroofandfloorsystems,..

TheCommitteedoesnotconsiderappropriatetoaddthewordspan.Thespansdonothavetobelongtorequirecarefulconsiderationofvolumechanges.Itisnotlongspan,butlonggeometrywhichisrestrained.

81. JamesS.Lai 4.4.6 45 SuggestchangingsectiontitletoLateralforceresistingsystemandaddasubsectiononwindforcewhensuchforcecontrolsthemainwindforcesysteminlowerseismicSDCs.Note:intheglobalmarket,suchasTaiwan,bothseismicandhighwindmaycontroldesignofconcretestructures,andACICodeiswidelyused.

ThiswaspreviouslyconsideredbyACICommittee318,butwasnotimplementedbecausethisCodedoesnothavespecificprovisionsformainwindforceresistingsystems.

82. MarkGilligan 4.4.6.2 Theideaofanauthority,assumedgovernmental,havingjurisdictionwithoutalegallyadoptedbuildingcodedoesnotmakesense.Ifthereisnoadoptedbuildingcodenobodyhasjurisdiction.

IthasbeenandcontinuestobetheintentofACICommittee318thattheACI318Codebeusablewhetherthereisorisntalegallyadoptedgeneralbuildingcode.ThiscodesectionreferstothelatterinamannertraditionallydonebyACI318.Wedonotagreewiththelaststatementinthecomment.ACI318isusedworldwide.AlthoughthemainfocusofthecodeistheUnitedStates,theCommitteeismindfulofitsuseinothercountries,whereanoverarching,nationalbuildingcodemaynotexist.

83. JamesS.Lai R4.4.6.4 46 5 2nd sentenceForexample,chapter18doesnot.isanincorrectstatement.Chapter18doescoverintermediatestructuralwalls.Suggestchanging

Chapter18isnotwrittenprimarilyforSDCD,E,andF.Thecommentiscorrect,however,inthatprecastintermediatewallsarecoveredforSDCC.Therefore,modifythelastsentenceas


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sentenceto:Chapter18isprimarilywrittenforbuildingsassignedtoSDCD,EorF;butisapplicableforperformancebasedesignofbuildingsassignedtoSDCBorC.Requesttodeletesentenceinitsentirety.

follows:Forexample,Chapter18doesnotincluderequirementsforordinarycastinplacestructuralwallsinSeismicDesignCategoriesBandC,butdoesincludespecialprovisionsforSeismicDesignCategoriesD,E,andF.

84. KariKlaboe 4.4.6.5

andR4.4.6.5

Chp.4

Entirecodesectionandcommentary

TheCodeandCommentarywordingsareconfusing:

Section4.4.6.5appearstoaddressstructuralmembersthatarenotpartoftheseismicforceresistingsystem.Areferencetononstructuralmembersisincludedinthelastsentenceofthecodesection;however,itjustrelatestoaddressingtheconsequencesofdamagetononstructuralmembers.Isthiscodesectionalsomeanttoexplicitlyaddressnonstructuralmemberinteractionwiththeseismicforceresistingsystem?

Section4.4.6.5(lastsentence),thiscommentisabitpicky,butthephrasing,Consequencesofdamagetostructuralandnonstructuralmembersthatarenotpartoftheseismicforceresistingsystemshallbeconsidered,seemstoimplythattherearenonstructuralmembersthatarepartoftheseismicforceresistingsystem.

SectionR4.4.6.5(Commentary)appearstoaddressnotonlythedesignofstructuralmembersnotconsideredpartoftheseismicforceresistingsystem,butalsotheinteractionofnonstructuralelementswiththeseismicforceresistingsystem.Thelatteritemisnotaddressedinthecodesectionand,whileimportantforengineersto

RevisetheCodeandCommentaryasfollows:Code4.4.6.5Structuralmembersassumednottobepartoftheseismicforceresistingsystemshallbepermitted,subjecttotherequirementsof4.4.6.5.1and4.4.6.5.2.4.4.6.5.1InstructuresassignedtoSeismicDesignCategoryB,C,D,EorF,theeffectsontheresponseofthesystem,andtheconsequencesofdamagetothosestructuralmembersthatarenotadesignatedpartoftheseismicforceresistingsystem,ontheresponseofthesystemshallbeconsideredandaccommodatedinthestructuraldesign.4.4.6.5.2.InstructuresassignedtoSeismicDesignCategoryB,C,D,E,orF,theconsequencesofdamagetothosestructuralmembersnotconsideredpartoftheseismicforceresistingsystemshallbeconsidered.4.4.6.5.23InstructuresassignedtoSeismicDesignCategoryD,EorF,structuralmembersnotconsideredpartoftheseismicforceresistingsystemshallmeettheapplicablerequirementsinChapter18.4.4.6.6EffectsofnonstructuralmembersshallbeaccountedforasdescribedinSection18.2.2.1andconsequencesofdamagetononstructuralmembersshallbeconsidered.Commentary(onlyrevisedtoseparateoutthepartssotheygowiththeassociatedCodesections.Thesentences,reorganized,areotherwiseunchanged.)


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address,seemstobeoutofplacewithrespecttothecodesectionitisnextto.TheissueofinteractionbetweennonstructuralmembersandtheseismicforceresistingsystemappearstobeaddressedclearlyinChapter18,Section18.2.2.1.

SectionR4.4.6.5(Commentary)appearstoalludeto,butnotdirectlyaddress,whetherornotstructuralmembersnotpartoftheseismicforceresistingsystemneedtobedesignedperChapter18.Chapter18,SectionR18.1clearlystatesthattheintentisforonlytheseismicforceresistingsystemtobedesignedperChapter18forSDCBandC.WhenIfirstreadthecommentarysection,IthoughttherewasatypobecausethefirstlineonlyreferstoSDCDthroughF,whilethecodesection(4.4.6.5)referstoSDCBthroughF.

Suggestedchangestoproposedsections:CodeSection4.4.6.5Structuralmembersassumednottobepartoftheseismicforceresistingsystemshallbepermittedandconsequencesofdamagetothestructuralmembersshallbeconsidered.4.4.6.5.1InstructuresassignedtoSeismicDesignCategoryB,C,D,EorF,theeffectontheseismicforceresistingsystemofstructuralmembersnotassumedtobepartoftheseismicforceresistingsystemshallbeconsideredandaccommodatedinthestructuraldesign.4.4.6.5.2InstructuresassignedtoSeismicDesignCategoryD,EorF,structuralmembersnot

R4.4.6.5 InSeismicDesignCategoriesD,EandF,structuralmembersnotconsideredpartoftheseismicforceresistingsystemarerequiredtobedesignedtoaccommodatedriftsandforcesthatoccurasthebuildingrespondstoanearthquake.R4.4.6.6AlthoughthedesignofnonstructuralelementsforearthquakeeffectsisnotincludedinthescopeofthisCode,thepotentialnegativeeffectsofnonstructuralelementsonthestructuralbehaviorneedstobeconsideredinSeismicDesignCategoriesB,C,D,E,andF.Interactionofnonstructuralelementswiththestructuralsystem,forexample,theshortcolumneffect,hasledtofailureofstructuralmembersandcollapseofsomestructuresduringearthquakesinthepast.


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consideredpartoftheseismicforceresistingsystemshallmeettheapplicablerequirementsinChapter18.[Ifareferencetointeractionsofnonstructuralmembersontheseismicforceresistingsystemneedstobeprovided,addanothersubsectionasshownbelow]4.4.6.6NonstructuralmembersshallbeaccountedforasdescribedinSection18.2.2.1andconsequencesofdamagetononstructuralmembersshallbeconsidered.CommentarySectionR4.4.6.5InSeismicDesignCategoriesD,EandF,structuralmembersnotconsideredpartoftheseismicforceresistingsystemarerequiredtobedesignedtoaccommodatedriftsandforcesthatoccurasthebuildingrespondstoanearthquake.[IfanadditionalsectionfornonstructuralmembersisnotaddedinChapter4,thenmovethenonstructuralmembercommentstoChapter18,Section18.2.2.1]R4.4.6.6AlthoughthedesignofnonstructuralelementsforearthquakeeffectsisnotincludedinthescopeofthisCode,thepotentialnegativeeffectsofnonstructuralelementsonthestructuralbehaviorneedstobeconsideredinSeismicDesignCategoriesB,C,D,EandF.Interactionofnonstructuralelementswiththestructuralsystem,forexample,theshortcolumneffect,hasledtofailureofstructuralmembersandcollapseofsomestructuresduringearthquakesinthepast.

85. RobertHale 4.5.2 ReplaceThemethodsofanalyseswithThemethodsofanalysis.Reason:grammatical

Agreewiththecommenter.Changeanalysestoanalysis.

86. KojiSakai 4.9 IwouldliketoappreciatetheincorporationofsustainabilityintotherevisedversionofACIBuildingCode.Atthesametime,however,Iwould

Untilsuchtimethatsustainabilityrequirementsarecodified,theproposedstatementflagstheneedtopayattentiontosustainability.


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liketopointoutthatthefundamentalideaonsustainabilityseemstobeimproper.(1) Firstofall, themeaningof sustainability should

be clearly defined as the code. If there is noproper definition, everybody understands it bytheirownway.

(2) The Code says that the licensed designprofessional shall be permitted to specifysustainability requirements and the strength,serviceability, and durability requirements shalltake precedence over sustainabilityconsiderations.

(3) In general, it is regarded that sustainability hasthree pillars, including economic, social, andenvironmental aspects. From thispointof view,the idea the strength, serviceability, anddurabilityrequirementsshalltakeprocedureoversustainabilityconsiderationisnotappropriate.

(4) Inaddition,socialaspectincludesanissueonthesafety of a structure, which means that theredundancy of safety is directly linked to socialsustainability.

(5) According to this logic, theexpressiondoesnotwork. Fundamentally, we need to consider allrequirementswith the balance among them asthe strength, serviceability, durability, andsustainabilityareinterrelated.

(6) Therefore,my suggestion is to delete 4.9.2.Orwemayexpressasfollows:

Thestrength,serviceability,durability,andsustainabilityshallbeconsideredwithareasonablebalance.

87. JamesS.Lai 5.2.1 56 InsertthewordwindafterearthquaketobetterreflecttheintentinusingACI318

Windisoneoftheappliedloadsandshouldnotbesingledoutforadditiontotheprovision.Otherappliedloadsincludelive,


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snow,rain,fluids,lateralearthpressureandice.Thecommitteedoesnotseemeritinlistingtheseindividuallyinthisgeneralprovisionwhenappliedloadsaddressesthemall.Theseloadsareindividuallyaddressedinsubsequentprovisions.

88. JamesS.Lai R5.2.1 56 ConsideraddingWindforcesarebasedonultimatewindvelocity(speed)inaccordancewithASCE710.

ThisisaddressedinR5.3.5andneednotbeaddedtothisgeneralprovision.

89. RubinMZallen 5.2.2 Substitutethewordtheforthewordanother(grammatical).

Changetoread:5.2.2Loadandseismicdesigncategories(SDC)shallbeinaccordancewiththegeneralbuildingcode,ordeterminedbyanothertheauthorityhavingjurisdiction.

90. JamesS.Lai 5.2.2 56 Revise sentence to read: Loads, wind and seismicdesigncategories.....(balanceunchanged)

Provision5.2.2iscorrectaswritten.Windisoneoftheloadsthatshallbeinaccordancewiththegeneralbuildingcode.Thecommitteebelievesthatitisinappropriatetosingleoutwindforadditiontothisprovision.

91. JamesS.Lai R5.2.2 56 5 ChangeNFPA2009toNFPA2012 ChangesecondsentenceofR5.2.2toread:SimilardesignationsareusedbytheInternationalBuildingCode(IBC2012)andtheNationalFireProtectionAssociation(NFPA20092012).

92. JamesS.Lai R5.2.2 58 3 ChangeNFPA2009toNFPA2012 Othercorrectionstodocumenttitlesandpublicationdateswerefoundsubsequenttopublicdiscussion.ReviseR5.2.2toread:R5.2.2SeismicDesignCategories(SDC)inthisCodeareadopteddirectly from ASCE/SEI 7. Similar designations are used by theInternational Building Code (IBC 2012), and the National FireProtection Association NFPA 5000 (NFPA 2012). The BuildingOfficialsandCodeAdministratorsInternational,Inc.BOCANationalBuildingCode(BOCA1999)andTheStandardBuildingCode(SBC1999)usedseismicperformancecategories.TheUniformBuildingCode (UBC1997) relatesseismicdesignrequirements toseismiczones,whereaseditionsofACI318prior to2008 related seismicdesignrequirementstoseismicrisk levels.TableR5.2.2correlates


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SDCtoseismicriskterminologyusedinACI318forseveraleditionsbeforethe2008edition,andtothevariousmethodsofassigningdesign requirementsused in theUnitedStatesunder thevariousmodelbuildingcodes, theASCE/SEI7 standard,and theNationalEarthquakeHazardReductionProgram(1994).

Design requirements for earthquakeresistant structures in thisCode are determined by the SDC to which the structure isassigned. Ingeneral, theSDC relates to seismichazard level, soiltype,occupancy,andbuildinguse.Assignmentofabuilding toaSDC isunder the jurisdictionof the generalbuilding code ratherthanthisCode.TABLER5.2.2 Correlationbetweenseismicrelatedterminologyinmodelcodes

Code,standard,orresourcedocument

andedition

Levelofseismicriskorassignedseismic

performanceordesigncategoriesasdefinedin

theCodeACI31808,ACI31811,

ACI31814;IBC2000,2003,2006,

2009,2012;NFPA5000,2003,

2006,2009;ASCE798,702,705,

710;NEHRP1997,2000,

2003,2009

SDC[1]A,B SDCC

SDCD,E,F

ACI31805andpreviouseditions

Lowseismicrisk

Moderate/intermedia

teseismicrisk

Highseismi

crisk


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BOCANationalBuildingCode1993,1996,

1999;StandardBuildingCode

1994,1997,1999;ASCE793,795;NEHRP1991,1994

SPC[2]A,B SPCC

SPCD,E

UniformBuildingCode1991,1994,1997

SeismicZone0,

1

SeismicZone2

Seismic

Zone3,4

[1]SDC=Seismicdesigncategory asdefined incode,standard,orresourcedocument.[2]SPC=Seismicperformancecategoryasdefined incode,standard,orresourcedocument.

Intheabsenceofageneralbuildingcodethatprescribesearthquakeloadsandseismiczoning,itistheintentofCommittee318thatapplicationofprovisionsforearthquakeresistantdesignbeconsistentwithnationalstandardsormodelbuildingcodessuchasASCE/SEI7,IBC(2012),andNFPA5000(2012).Themodelbuildingcodesalsospecifyoverstrengthfactors,o,thatarerelatedtotheseismicforceresistingsystemusedforthestructureanddesignofcertainelements.

93. Dr.HUSAINKHALAFJARALLAH

5.3 59 Table5.3.1theloadcombinationduetoTemperatureloadeffectneedtobedefiningasgivenbelow:

1. 1.2DL+1.2T+1.6LLDL+0.75LL+0.75T

Theproposedloadcombinationsdonotcomply withASCE/SEI710section2.3.5.

94. RubinMZallen 5.3.1 TheloadfactorsandcombinationsofTable5.3.1appeartobefromASCE710.Whyisitrepeatedhere?Alsowhatabouttheprimacyofthegeneralbuildingcodeortheauthorityhavingjurisdictionifthereisnobuildingcode?

TheloadcombinationsareincludedintheCodebecausesomecodeusersoutsideoftheUSmaynothaveaccesstoASCE/SEI710.ThedeterminationofprimacyisbeyondthemandateofCommittee318.

95. JamesS.Lai R5.3.1 59 Lastparagraph revisetoread:Modelbuilding Thesubjectofthecommentaryparagraphiscodesthatuse


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codesanddesignloadreferencerefertoearthquakeandwindforcesatthestrengthlevel.....(balanceremain)tobetterreflecttheintentinusingACI318

strengthlevelearthquakeforces.AddingwindwillconflictwiththeremainingwordingwhichreferencesBOCA/NBC99,SBC99,andUBC97.Thesecodesdonotusestrengthlevelwindloads.

96. MarkWCunningham

R5.3.1 59 Inthelastparagraph,whyreferenceBOCA/NBC99,SBC99,UBC97,whichareratheroutdated?WhynotjustreferenceASCE/SEI710andIBC2012?IsuggestrewordingfirstsentenceasASCE/SEI710andIBC2012refertoearthquakeforcesatthestrengthlevel,andthecorrespondingloadfactoris1.0.

Theoutdatedreferencesidentifystandardsthatuseearthquakeforcesatstrengthlevelthatareconsistentwithaloadfactorof1.0.ThisinformationisusefuloutsideoftheUnitedStateswheretheymaynotbeusingASCE/SEI710andIBC2012.

97. DavidDeValve Eq.5.3.1d,e

60,62

Isn'tequationsd&ealwaysgreaterthanequationsf&g:given1.2D>0.9D,andtheadditionofHin5.3.8doesnotchangethis?

Eq.5.3.1dandetypicallygovernverticalloadeffectswhileEq.5.3.1fandgtypicallygovernlateralloadeffectssuchassliding,overturning,anduplift.Hcanbeapassiveearthpressureoranactiveearthpressuremakingithardtotellwhichequationsgovernthedesignofanyparticularmember.

98. Dr.HUSAINKHALAFJARALLAH

5.3.5 60 it is not only the factor of the wind load will be

changeiftheserviceloadlevelusedbutthefactorfor

dead load and live load will be change also. Still

further, if thewind loaduse according toASCE the

following load combinationwillbeused for all load

case:

Load Combinations for Strength Design

ASCE705andIBC09

DL=DeadLoad

LL=LiveLoad

T=TemperatureLoad

1. 1.4DL

2. 1.2DL+1.2T+1.6LL

3. 1.2DL+0.8WIND

TheproposedloadcombinationsarefromASCE/SEI705whileACI31814isbasedonASCE/SEI710loadcombinations.WhenWisbasedonservicelevelloads,theloadfactorsonloadsotherthanWdonotchangeinASCE/SEI710.1.6timestheservicelevelwindcorrespondsto1.0timethestrengthlevelwindforuseinEq.5.3.1dwhichistheloadcombinationwithwindastheprimaryload.0.8timestheservicelevelwindcorrespondsto0.5timesthestrengthlevelwindforuseincombinationswherewindisacompanionload.


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4. 1.2DL 0.8WIND

5. 1.2DL+1.0LL+1.6WIND

6. 1.2DL+1.0LL1.6WIND

7. 0.9DL+1.6WIND

8. 0.9DL1.6WIND

Load Combinations for Allowable Stress

DesignaccordingASCE705andIBC09

DL=DeadLoad

LL=LiveLoad

T=TemperatureLoad

1. DL

2. DL+LL+T

3. DL+0.75LL+0.75T

4. DL+WIND5. DLWIND

6. DL+0.75LL+0.75WIND

7. DL+0.75LL0.75WIND8. 0.6DL+WIND9. 0.6DLWIND

99. MarkW

Cunningham5.3.7(c) 62 Theproposed5.3.7isatechnicalchangefromACI

31811.ThecrossreferencekeysprovidedforthisPublicDiscussionPerioddonotindicateanytechnicalchangeforthissection.Furthermore,thearticleThePublicDiscussionPeriodforACI31814inMay,2014ConcreteInternationalindicatesthattheprovisionsinproposedChapter5remainthesameasthosein

ThetreatmentoffluidsloadFin31814isconsistentwithASCE/SEI710.SeeASCE/SEI710commentarysectionC2.3.2forfurtherinformation.


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31811.ASCE710doesnotconsiderthatFmaybepermanent,thatiswhyASCE710doesnotuseFtocounteractWinsection2.3.2,Eq.6ofthatstandard(ACI31814Eq.(5.3.1f)).ThecommentaryforASCE7states:However[F]isnotpermanent;emptyingandfillingcausesfluctuatingforcesinthestructure,andFisnotincludedincombination6becausethewindloadcanbepresentwhetherthetankisfullorempty,sothegoverningloadcaseincombination6iswhenFiszero.ACI31814proposestodeviatefromthephilosophyofASCE7,byintroducingtheconceptofpermanentF.IfFispermanent,thenitshouldalsobeapplicableinloadcase(5.3.1f),withaloadfactorof0.9.Hence,5.3.7(c)wouldneedtobechangedto:IftheeffectofFispermanentandcounteractstheprimaryload,itshallbeincludedwithaloadfactorof0.9inEq.(5.3.1f)and(5.3.1g).However,anotherproblemisthatFcertainlyneedntbepermanenttobeincludedinloadcombinationEq.(5.3.1.g).ThepresenceofFaddstotheseismicload,E,so0.9Fisusedtocounteracttheprimaryload,E.TheASCE7commentarystates:ThemassofthefluidisincludedintheinertialeffectduetoE,andTomakeitclearthatfluidweightinatankcanbeusedtoresistuplift,Fwasaddedtoloadcombination7,whereitwillbetreatedasdeadloadonlywhenFcounteractsE.So,IsuggestrevertingbacktothewordingofACI31811,9.2.4(andnotmakeanytechnicalchangesin


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31814):WhereF ispresent,itshallbeincludedwiththesameloadfactorasDinEq.[(5.3.1a)through(5.3.1e)and(5.3.1g)].

100. WilliamSherman 5.3.8 62 LoadfactorsforearthloadsrefertoIftheeffectofHispermanent.Whatisthedefinitionofpermanent?Whiletheintentmaybeforearthloadstoremaininplace,earthloadsmayberemovedduetoexcavationforadjacentconstructionor,infloodareas,erosionfromfloodwaters.Also,anoteshouldberequiredontheengineeringdrawingsifearthpressureisassumedtobepermanent.

ACI31814isconsistentwithASCE/SEI710.ThequestionshouldbeaddressedtoASCE/SEI710.

101. MarkWCunningham

5.3.8(b) 62 Theproposed5.3.8isatechnicalchangefromACI31811.ThecrossreferencekeysprovidedforthisPublicDiscussionPerioddonotindicateanytechnicalchangeforthissection.Furthermore,thearticleThePublicDiscussionPeriodforACI31814inMay,2014ConcreteInternationalindicatesthattheprovisionsinproposedChapter5remainthesameasthosein31811.Theprovisionreads:IftheeffectofHispermanentandcounteractstheprimaryload,itshallbeincludedwithaloadfactorof0.9inEq.(5.3.1f)and(5.3.1g).ThisissayingthatpermanentHmayonlybeusedtoresistWandEinequations5.3.1fand5.3.1g.Thiswouldbeamajorchangefrom31811,whichstates:wheretheeffectofHispermanentandcounteractstheeffectsofotherloads,itshallbeincludedwithaloadfactorof0.9inallloadcombinations.ItwouldalsobeamajordeviationfromASCE/SEI710forthesamereason.ASCE/SEI7isreferencedinR5.3.8ACI318shouldbeconsistentwithit.Additionally,HmayresistFalthoughFisntidentifiedasaprimaryload.

Inadditiontomodifying5.3.8(b),thecommenttriggeredchangesto(a)and(c).Revise5.3.8toread:5.3.8IflateralearthpressureHispresent,itshallbeincludedintheloadcombinationequationsof5.3.1inaccordancewith(a),(b),or(c):(a)IfHactsaloneoraddstotheprimaryloadeffect,itshallbeincludedwithaloadfactorof1.6.inEq.(5.3.1a)through(5.3.1e).(b)IftheeffectofHispermanentandcounteractstheprimaryloadeffect,itshallbeincludedwithaloadfactorof0.9.inEq.(5.3.1f)through5.3.2g).(c)IftheeffectofHisnotpermanentbut,whenpresentcounteractstheprimaryloadeffect,Hshallnotbeincluded.inEq.(5.3.1a)through(5.3.1g).


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Therefore,changeto:IftheeffectofHispermanentandcounteractstheprimaryloadorF,itshallbeincludedwithaloadfactorof0.9inEq.(5.3.1a)through(5.3.1g).

102. DavidDeValve R5.3.12 634 Reasoningseamsconfusingbetween:designload...specifiedyield...nominaltensilestrength...'?

Thereasoningandwordinginthecommentaryaresound.TheyareconsistentwiththemaximumtensilestressesintheprestressedreinforcementprescribedinTable20.3.2.5.1whichareusedtoestablishthemaximumjackingforce.

103. JeremyListerud 6.0 Chapter6

Inchapter6Inoticedthatthemomentcapacityofconcretewithrebarismissing.Thatisafundamentalrequirement.Itwasmissinginthelastversion2011editionaswell.Thereasonwhypeoplecantdothestructuralengineeringtodayandwearegoingtostartbeingheldresponsibleforlivesisthatyouneglecttoputthefundamentalsin.Pleaseaddinthediscussionofbeammomentcapacityandthedevelopmentofthea.

MomentcapacityofconcretewithrebardoesnotbelonginChapter6.Withthecodereorganization,Chapter6dealswithstructuralanalysiswhichdeterminesthestructuraldemandsonamember.Otherchaptersaddressthestructuralcapacityofamember.

104. JianZhao R6.2.3 65 ShouldweusePandPwithahyphen? ThisisthenotationthathasbeenusedinpreviouseditionsoftheCode.

105. JamesS.Lai R6.2.5 66 2nd paragraph Thehighhandruleconventionisnotacommontermintheglobalmarket.SuggesttheCommentarytoincludeadiagramforsignconventionofM1andM2toavoidconfusion.

ReviseR6.2.5toread:ThesignconventionforM1/M2hasbeenupdatedsothatM1/M2isnegativeifbentinsinglecurvatureandpositiveifbentindoublecurvature.Thisreflectsasignconventionchangefromthe2011code.


6.2.5 66 Sect.6.2.5

Belowsection#6.2.5quitesometextfollows,andthensect.6.2.5.1starts.TheuserofACI318wonderswhatthistextinthebeginningisabout.Ifheadingswouldbeintroducedaftersectionnumbers,thissectionwouldnotappearinthelistofcontents.Thistextcannotpreciselyreferredtobynumber,butonlybytherulesgivenbelowsection#6.2.5and

TheCodeprovisionscanbereferencedexplicitly.Itisbelievedthatthecommentrelatestocommentary.R6.2.5whichhasfiveparagraphs.GiventhatdesigncalculationsreferenceCodeprovisionsratherthancommentary,changesarenotwarrantedandwouldrendertheCodelessreadable.


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before6.2.5.2;thisisobviouslycuriousandnoteffective.Introducenewsect.6.2.5.1directlybelow6.2.5,andrenumberthefollowingsection1up,like6.2.5.1to6.2.5.2etc.

107. AliHussein 6.3.2.1 Paragraphinthecurrentcodenumbered8.12.2Inthenewcodenumbered6.3.2.1ThisparagraphinthenewcodearenotentirelyclearorcontainsomethingofamysteryintranslationineithercodeThewaythecurrentarrangementismorepronouncedthanthenewcode.Proposalifitweretobethebestformofausercode(Sourcedrawinglectures,Dr.AliNaji)

Whiletheproposedchangesmayhavemeritintextbooksandlecturenotes,itistheCommitteesopinionthattheinformationaspresentedissufficienttoconveytheCoderequirements.

108. KariKlaboe 6.3.2.1 Chp.6

Table6.3.2.1.ForTbeamswithoverhangingflangesonbothsidesofthebeamweb,theproposedcodehasincreasedtheallowableflangeoverhangbasedonspanlength.InpreviouscodesthetotalwidthofslabeffectiveasaTbeamflangewaslimitedto1/4ofthespanlength.Theproposedcodeallowsforthe

AddthefollowingcommentaryR6.3.2.1InACI31811,thewidthofslabeffectiveasaTbeamflangewaslimitedtoofthespan.TheCodenowallows1/8ofthespanoneachsideofthebeamweb.ThiswasdonetosimplifyTable6.3.2.1andhasnegligibleimpactondesigns.


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flangewidthtonowbe1/4thespanlengthplusthewidthofthebeam(Table6.3.2.1allowsfor1/8thespanlengthoneachsideofthebeamweb).IfTable6.3.2.1isgoingtochangetheeffectiveflangewidthforTbeams,thenIthinkitshouldbenotedintheCommentarythatachangefrompreviouscodeversionswasmade.

109. DavidDeValve 6.4.26.4.2a)

72 Subject/tenseagreement:"...onalternatingspans."or"...onanalternatespan."

Alternateiscorrectandshouldnotbechanged.

110. AliHussein 6.5.2 Paragraphinthecurrentcodenumbered8.3.3Inthenewcodenumbered6.5.2Orderthisparagraphisatableinthenewcodeisbetterthanthecurrentcode,butiftheyincludeIllustrationbemuchbetter.((Sourcedrawinglectures,Dr.AliNaji))

COMMITTEERESPONSE:Whiletheproposedchangesmayhavemeritintextbooksandlecturenotes,itistheCommitteesopinionthattheinformationaspresentedissufficienttoconveytheCoderequirements

111. RubinMZallen 6.6.2.3 Inparagraph(b),substituteforforor.(typo). Thisisnotatypo.Theprovisionisalsointendedtoapplytocontinuousconstructionthatmaynotbeaframe.Acontinuous


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onewayslabonmonolithicbeamsisnotaframeandwouldbeexcludedbytheproposedchange.

112. RubinMZallen R6.6.3.1 LastsentenceofparagraphonTbeamsisincomplete.

Thesentencestartsonpage75andendsonpage76.Theremainderofthesentenceisatthetopofpage76.


6.6.3.1 75 Sect.6.6.3.1

Belowsection#6.6.3.1quitesometextfollows,andthensect.6.6.3.1.1starts.TheuserofACI318wonderswhatthistextinthebeginningisabout.Ifheadingswouldbeintroducedaftersectionnumbers,thissectionwouldnotappearinthelistofcontents.Thistextcannotpreciselyreferredtobynumber,butonlybytherulesgivenbelowsection#6.6.6.3.1andbefore6.6.3.1.1;thisisobviouslycuriousandnoteffective.Introducenewsect.6.6.3.1.1directlybelow6.6.3.1,andrenumberthefollowingsection1up,like6.6.3.1.1to6.6.3.1.2etc.until6.6.3.1.3to6.6.3.1.4

TheCodeprovisionscanbereferencedexplicitly.Itisbelievedthatthecommentrelatestocommentary.R6.6.3.1.1whichhasfourparagraphs.GiventhatdesigncalculationsreferenceCodeprovisionsratherthancommentary,changesarenotwarrantedandwouldrendertheCodelessreadable.

114. DariuszReczek,PE

R6.6.3.1.1

76 2to7 Requirementtomodifythemomentofinertiaofacrackedconcretewall(shearwall)from0.7Igto0.35Igisambiguousandneedsclarificationregardingtheextentofsuchadjustment.Amongstengineersinvolvedindesignofhighriseresidentialconstruction,thisseemstovary:(i)Iwall=0.35Igbetweenfloorslabsonlyalongcrackedwallfiniteelements(evenwith4%ofreinforcementwithinthewalland5,000psiconcrete,theequivalentelasticityofsteel(concretecontributionignored)iswellbelowthe0.35Ig)(ii)Iwall=0.35Igbetweenfloorslabsalongtheentireplanesectionofwallwhichportionscracked(suchastheentireflangeofaCshapedshearwall)(iii)Iwall=0.35Igbetweenfloorslabsalongtheentirewall(suchasbothflangesandwebofaCshapedshearwall)Assumingnotalloftheabovealternativesarecorrect,shouldnttheCodebetterdefinethisissue

NewBusiness.Thequestionofwhatistheappropriatestiffnesstouseinthestructuralanalysisisanongoingchallengethatwillcontinuewiththenextcodecycle.Thecommentswillbetakenintoconsideration.


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forthedesigncommunity?115. Dr.HUSAIN

KHALAFJARALLAH

6.6.3.2.2 78 It was concluded from my PhD research study(Jarallah,H.K.,2005,"InelasticSeismicResponseofR.C.FramedBuildingswithaSoftStorey",Ph.D.Thesis,DepartmentofCivil Engineering, I.I.TRoorkeeIndia.The thesiswas evaluated by Prof. ChristianMeyer,Department of Civil Engineering and EngineeringMechanics, Columbia University, New York, U.S.A.)That:Theeffectmomentofinertiareducesfrom1.0to0.08timesthegrossmomentofinertiaincaseofhighnonlinearityinthememberespeciallyiftheframebuildingissubjectedtorepeatedseismicload.Ibelievethevaluegivenformomentofinertiatocalculatethelateraldeflectionneedstoberevised.

NewBusiness.Thequestionofwhatistheappropriatestiffnesstouseinthestructuralanalysisisanongoingchallengethatwillcontinuewiththenextcodecycle.Thecommentswillbetakenintoconsideration.


6.6.4.5.2 Whydoesnttheformula(6.6.4.5.2stateKversusthe0.75.?

Eq6.6.4.5.2uses0.75ratherthanKforsimplicity.ThiseliminatestheneedtodefineK,andgivesthecodeuseronelessvariabletoremember.


6.6.4.5.3 AddwhereM1isthesmallerofthetwomomentsinabsoluteterms.

Theproposalhasmerit,butcreatesarunonsentence.Revise6.6.4.5.3(a)toread:whereM1/M2isnegativeifthecolumnisbentinsinglecurvature,andpositiveifbentindoublecurvature.M1correspondstotheendmomentwiththelesserabsolutevalue.

118. DavidDeValve 6.6.5.3 90 Isanycommentaryneededtoexplainthedifferencebetween"...notexceedthelesserof1000Et%&20%."oristhereferencedfigenough?

Thereisnoneedtoaddafigure.FigureR6.6.5isinthecommentary,somesevenpageslateronpage97.InthefinalprintedversionoftheCodeandCommentary,FigureR6.6.5willbelocatednear6.6.5.

119. AliHussein 7.0

Chapter7

InthenewcodehasbeenaddedtochartsummarizestheimpactontheslimdesignofthecolumninChapterVI.IftheproposalistoaddatablecollectsandsummarizesthelawsforthedesignshearThesourceofthistable(PCANOTE)

TheACIBuildingCodeisnotintendedtobeadesignaid.Atablethatsummarizesdesignforonewayshearbelongsintextbooksordesignguides.Therequirementsforshear,however,areprovidedintabularformin9.6.3.3and9.7.6.2.2.


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120. JeremyListerud 7.0 Chapter7

Ireviewedchapterseven.Itdoesn'thavethemomentcapacityequationinit.Pleaseaddinthemomentcapacityequation.Chapter22alsodoesn'thaveit.Youarefailedatunderstandingengineering.Themomentcapacityistheprimaryconcretecapacityweneed.YougothroughthemomentloaddevelopmentwhichbyengineeringcanvaryonmethodsbutyoudonotrequirethestandardmomentcapacityMnequations.

Theequationforcalculationofmomentcapacityisconsideredtextbookmaterial,andforthisreason,itisnotincludedintheCode.However,Section22.2providesdesignassumptionsthatcanbeusedforcalculationofflexuralstrength.Thenextcodecyclewillaimtoremoveothertextbookmaterialthatisnotcentraltothecodepresentation.

121. DavidMcDonald 7.6.1.1 102 Thetwoequationsinthetablearediscontinuousat60,000psi.Thisshouldbereviewedinfutureeditions.

Theminimumareasofreinforcementareempiricalandwerenotintendedtoprovideacontinuousfunctionforyieldstrengthslessthan60,000psi.Itismorelikelythatinfutureeditions,yieldstrengthslessthan60,000psiwillbedroppedfromthetableasthedemandforsuchreinforcementdiminishes.

122. JasonHerrman 8.0

Ch.8+

All Whenscrollingthrough,Inoticedtheheaderchangeslocation,font,andsize.

TheseitemswillbefixedbythePublishingServicesDepartment.


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31814123. DavidDeValve 8.3.1.2 113

4 Betterdefinef herebeforeusingit?? FootnotesinbothTables8.3.1.1and8.3.1.2directtheuserto

8.10.2.7forthedefinitionoff.Reorderfootnote[4]ofTable8.3.1.1asfollows:[4]Slabswithbeamsbetweencolumnsalongexterioredges.Exteriorpanelsshallbeconsideredtobewithoutedgebeamsiffislessthan0.8.Thevalueofffortheedgebeamshallbecalculatedinaccordancewith8.10.2.7.Exteriorpanelsshallbeconsideredtobewithoutedgebeamsiffislessthan0.8.

124. DavidDeValve 08.4.1.4 116 Couldafig.illustratethisbetterandbeplacedinthecommentary!?

SuchafigurewasnotincludedinACI31811 andthereforewasnotincorporatedintoACI31814.Anewfigurewillbeconsideredfornewbusiness.

125. AminGhali R.8.4.2.3.2

117 A commentary is proposed for Section 8.4.2.3.2 inthefollowingmeaning:R.8.4.2.3.2Based on finiteelement research, ACI421.1R08 validates Eqn. (8.4.2.3.2) to shear criticalsectionwhoseperimeterisaclosedrectanglehavingside lengths = b1 and b2. For other shapes, thereferenceprovidesadjustedequations.Wherejustified,theuseoftheadjustedequationsgivesareducedvalueforthefractionofMsctobetransferredbyshear.

Theadditionoftheproposedcommentarydoesnotappeartoberelated,since8.4.2.3.2addressesthefractionoffactoredslabmomenttransferredbyflexure,whiletheproposedcommentaryaddressesthefractiontransferredbyshear.Additionofthiscommentarymaterialinthepropercontextwillbeconsideredfornewbusiness.

126. RamezGayed 8.4.2.3.4&

R8.4.2.3.4

117 An objective of the version of 2014 is removal ofoutdated provisions. Removal of 8.4.2.3.4 andR8.4.2.3.4 fromACI31814 isneeded,because theyareoutdated(notneededinmoderndesignandtheyjeopardizesafety).Theprovisionanditscommentarypermit an optional analysis of the shear stressinducedbyMsc.By assuming a reduced valueof v,the calculated shear stressdue toMsc isdiminishedorcompletelyignored.Theresultingdesignincreasesflexuralreinforcementandreducesoreliminatestheneedforshearreinforcementandthecalculationsfor

Thecommitteedoesnotconsider8.4.2.3.4andR8.4.2.3.4tobeoutdated.TheremovalofthesesameprovisionswasproposedbythesamepubliccommenterintheCodecyclewhenACI31808wasadopted.Thecommitteeresponsetotheproposalatthattimewas:TheCommitteedoesnotagreewiththecommenterinterpretationoftherequirement.Atedgeandcornercolumnsmomentistransferredbetweenslabandcolumnbybendingandshearatthecolumnfacetransversetothedirectionofmomenttransfer,andbyshearandtorsiononthesidefacesparalleltothedirectionof


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its design. Providing or installing the required extraflexural reinforcement is easier than shearreinforcement. When the optional analysis isadopted, enhancement of safety against ductileflexural failure and intensification of risk of brittlepunching failure are inevitable. Enhancing safetyagainstflexuralfailureisdesirable;but,riskingbrittlepunchingshearfailuremustbeavoided.The motives to adopt 8.4.2.3.4 no longer exist.Modernpunchingsheardesign is invariablydonebycomputer programs satisfying the requirement ofChapter 8 without that option. Eliminating orsimplifying computations is no more an issue.Providingorinstallingmodernshearreinforcementisnotahindrance.Experimentsgive thevaluesofVandMscat failure,butcannotgivethevalueofv.Thiscanbedoneonlybyanalyticalresearch thatcanpredict theresultsofthe tests. There isno testor analysis that supportsany of themodified values of f in Table 8.4.2.3.4.Relativelyrecentresearch(MegallyandGhali(2000);GayedandGhali(2008))indicatethatnoreductionofvcanbesafelypermitted;thefollowingissummaryofresults: Nonlinear finiteelement (FE) analyses for

interior, edge and corner connections satisfying the requirements of 8.4.2.3.4 showedlittlevariationofvoccursasthelevelofshearing force and unbalanced moments aregradually increased up to failure (Megally andGhali(2000);GayedandGhali(2008));thisworkconfirmed that the empirical equationsof v in

momenttransfer.Inteststheamountofmomenttransferredbyshearversusthattransferredbyflexureissensitivetothedetailingoftheflexuralreinforcementasitisanchoredattheedgeoftheslabadjacenttothesidefacesofthecolumnandwhetherthesubassemblagebeingtestedcanallowformomentredistributionastheslabedgecracksintorsionornot.In11.5.2[ofACI31805atthetime,ACI31811now]twoconditionsarerecognized,oneinwhichtherecannotbearedistributionofinternalforceswhenthereiscracking(equilibr

318_Closure (1)

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