ACCESS CANADA - mills-scaffold.com

ACCESS CANADA JULY 2007

Magazine of the Scaffold Industry Association of Canadawww.scaffoldaccess.ca

SSFI Testing forSystem ScaffoldsHydro Mobil’s 50thTraining session

Let’s Talk Shoring

Testing System Scaffolds

Hydro Mobile’s 50thTraining Seminar

Let’s Talk about ... Shoring

Scaffolding Today provides all of the benefits of a high-quality productcombined with a total commitment to service our customers’ ever-demanding needs.

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For further information, sales or rental pricing call yournearest STI location.

• STI System Scaffold• Frame Scaffold • Tube & Clamp• Steel Planks

• Shoring Frames• Post Shores• Wood Planks• Aluminum Decks

Designed to meet and exceed ANSI and OSHA requirements

ACCESS CANADA www.scaffoldaccess.ca

JULY 2007

SIAC New Members

Table of Contents

EdItor John o’[email protected]

Co-EdItor Bill [email protected]

AdvErtISINg Chris [email protected]

ProduCtIoN AdvISor Al [email protected]

MEMBErSHIP Michael van [email protected]

tECHNICAl AdvISor Jim Wilkinson, P. Eng. [email protected]

tECHNICAl AdvISor John rosenthal, P. Eng. [email protected] tECHNICAl AdvISor Stephen Pike [email protected] ACCESS CANAdA Magazine is Published by the staff of the Scaffold Industry Association of Canada. the magazine’s content does not reflect the opinion of the Scaffold Industry Association of Canada, nor does the Association assume any responsibility for articles and artwork. Canada Post Publications Mail Agree-ment No. 41440042. Send Address Changes to: SIAC, 116 greenshire drive Hamilton, ontario l9C 7g5

CoMMIttEES 2007 - 2008

FAll ProtECtIoNStephen [email protected]

MASt ClIMBINg PlAtForMSJim [email protected]

PoWErEd ElEvAtEd Work PlAtForMSgraham [email protected]

SCAFFold Peter [email protected]

SWINgStAgEIan [email protected]

StrAtEgIC PlANNINg Peter [email protected]

MEMBErSHIPJohn o’[email protected]

ProduCt StANdArdSCristian [email protected]

trAININg John [email protected]

WEBSItEStephen [email protected]

CoMMuNICAtIoNSroger [email protected]

articles

4 President’s Report 5 Cantilevered Scaffolds 6 Alberta Report 7 Accident Information 9 Wicked the Musical Project 10 Let’s Talk about ... Shoring 11 Hydro Mobile Training 12 Ontario Chapter 2007 AGM 16 Mills Versa Light Scaffold 16 Action Scaffold Services 18 Product Testing 21 Code of Safe Practice

Profile 9 Wicked the Musical Project

Profile 18 System Scaffold Testing

Cover: Courtesy of John Rosenthal. P. Eng.Water Tower Project in Toronto, Ontario, Canada

For Advertising For Membership Contact Contact Chris Earnshaw Michael Van [email protected] [email protected]

3

r tEX INC rr # 2 BAltIMorE oNtArIo k0k 1C0 (905) 349 2585 [email protected] CoNtACt: roN NIEuWStrAtEN


JULY 2007

BoArd oF dIrECtorS 2007-2008

PrESIdENtJohn o’[email protected]

AdvISor to tHE PrESIdENtAl [email protected]

SECrEtAryChris Earnshaw [email protected]

trEASurErMichael van [email protected]

dIrECtorroger [email protected]

INtErNAtIoNAl dIrECtorJohn [email protected]

dIrECtorgraham [email protected]

NAtIoNAl dIrECtorStephen [email protected]

dIrECtorMichael [email protected]

dIrECtordarren [email protected]

dIrECtorJames [email protected]

Scaffold Industry Association of Canada

From the President.......Summer Report

AnothermilestonewasachievedintheCanadianAccessIndustrywiththeelectionoftheSIACNationalExecutiveduringthelastteleconferencemeeting,withRedArm-

strongappointedasChairman,tworepresentativesfromAlbertaandOntarioandoneeachfromAtlantic,BC,andQuebec.TheCouncilwillcontinuetoaddressthoseissuesrelevanttoallCanadianChaptersandreportonaformalstructuredbasis.Our lead issue this month is modular system scaffolds, first introduced to the Canadian mar-ketin1979howeveroriginallydevelopedinEuropeinearly1960andnowusedextensivelyalloverNorthAmerica.ThereareseveraltypesofmodularsystemscaffoldsbutthemostcommonareeitherRosettestyleorCupstyle,bothtypesofsystemsnowthescaffoldproductofchoiceformostindustrialscaffoldprojectsandmanycommercialstructures.

WiththeexceptionofthreeCanadianmanufacturers,allmembersoftheSIAC,mostsystemscaffoldsarenowmanufacturedinmanyothercountriesanditisinthebestinterestsofthescaffoldindustryifeachandeverycompanyinvolvedintheprocurementofthisproductensuredthattheywereprovidedwithallrelevanttechnicalinformationincludingtestreports.Thesetestsshouldbeconductedinaccordancewiththedetailincludedinthecomprehensivearticleonloadtestingforsystemscaffoldsinthisissue.

TheAlbertaChapterheldtheirannualsummermeetingandGolftournamentinmidJuneandallwhoattendedreportedthatthiswasamajorsuccesswiththeannouncementthattheBCChapterwillbemergingwithAlbertaandthatthiswillnowbepartofthenewWesternCanadaChapterthatalsoincludestheProvincesofManitobaandSaskatchewan.Welookforwardtoreportingonthedetailsoftheirmeetinginournextissue.

TheinauguralmeetingofthenewAtlanticChapterwasheldinHalifaxlastmonthwithrepresentationfromallthemajorscaffoldcompaniesto-getherwithamajorlabourcontractor.FurthermeetingsareplannedwithasteeringcommitteechairedbyKentConnellofSteeplejackServicesformedtomapoutthedirectionandstructureofthisnewChapter.

OurCommitteescoveringScaffoldTrainingandFallProtectioncontinuetoaggressivelyaddressthesedif-ficult tasks. C.S.A. Standard Z797 for scaffold erection continuesdevelopmentunderthechairmanshipofJohnBrasilofEtobicokeIronworks.Welookforwardtohisreportonthisnationalissue.

John o’Hara President SIAC ontario Chapter

lISt oF AdvErtISErS

MIllS CoNStruCtIoN ProduCtS INC. www.mills-scaffold.com

WINSAFEwww.winsafe.com

SCAFFoldINg todAy INC. www.scaffoldingtoday.com

AluMA SyStEMS INC.www.aluma.com

SCAFoM CANAdAwww.scafom.ca

doN Fry SCAFFold SErvICE INC.www.donfryscaffold.com

EtoBIkE IroNWorkS ltd.www.eiw.ca

ACtIoN SCAFFold SErvICES www.actionscaffoldservices.com

Ontario Chapter

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JULY 2007

Cantilevered ScaffoldsBy John Rosenthal, P. Eng. [email protected]

theprimarypurposeofanyscaffoldistosupportaworkingplatform.Sometimesaworkingplatformisrequiredthatextendsbeyondthebaseofthescaffold.Thisiswhenwemakeuseofacantileveredplatform.Ascaffoldwitha

cantileveredplatformiscalledaCantileveredScaffold.ItisespeciallyimportanttoknowhowtoerectCantileveredScaf-foldsproperlybecausetheloadsonthecantileveredplatformstendtooverturnthescaffold.Impropererectionproceduresmightallowthescaffoldtotip.Thiscouldresultinaverydangeroussituationforworkersonthescaffold. Cantileveredplatformsarebuiltoutfromthesideofanexistingscaffoldorplatformtoprovideadditionalworkingspaceoraccesstoanareaabove.Cantileveredplatformsarealsousedwhenanobstructionpreventsbuildingthescaffoldcloseto the working area. Another definition of a cantilevered scaffold is one in which a substantial portion of the weight of the scaffoldisoutsidethebasedimensionofthescaffold.

Themostfamiliarcantileveredplatformwedealwithisasidebracket(orendbracket)platform.WeusesidebracketsonframescaffoldsandalsoonSystemScaffolds.Forthisexample,we’lltalkaboutFrameScaffolds,buttheconceptappliesequallytoSystems. Theillustrationshowsaworkeronasidebracketplatform.Themostimportantthingistoknowthatthescaffoldwillnottipwhileheiscarryingouthiswork.OntariorequiresaSafetyFactorof4againstoverturning. Ifweconsiderthescaffoldtobelikeateeter-totter,pretendthatscrewjackontheleftsideisn’tthere.Withthepivotpointatthescrewjacknearthewallthatisbeingworkedon,wehavetheweightoftheworkerandthesidebracketplatformtendingtomakethescaffoldtiptotheright.Theweightofthemainpartofthescaffoldtendstomakethescaf-foldassemblytiptotheleft,(orthescaffoldweightresiststhetipping).

WeneedtoknowifwehaveanadequateFactorofSafetyagainsttip-ping,toprotecttheworkerfrombeinginjured. Wenormallyconsiderthataworkerweighsabout250lb(200lbmanplus50lboftools).Asidebracketweighsabout12½lb.Therearetwosidebrackets,sotheirtotalweightis25lb.Ifweassumethatthescaffoldisusing7-footcrossbraces,we’llhave8-footplanksonthesidebracketplatform.Planksweighabout5lbpersq.ft.Eachplankcovers10/12x8=6.67sq.ft.Therearetwoplanksonthesidebrack-ets,sotheplanksweigh2x6.67x5=66.67lb. Continued on Page 14

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JULY 2007

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SuperMod Modular Stages - lengths up to 62’, corner and circular platforms, and the best selling walk thru stirrup.SuperDeck platforms as big as 40 x 28

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theAlbertaChapterisaliveandwell,andcontinuestoplayanimportantroleintheScaffoldIndustryinAlberta.

AstheBritishColumbiaChapterhasworkedcloselywiththeWorker’sCompensationBoardofB.C.,andastheOntarioChapterhasalonghistoryofcloserelationshipswiththeOntarioMinistryofLabour,sotheAlbertaChaptermaintainsclosetieswiththeOccupationalHealthandSafetyAssociationofAlberta,aswellastheAlbertaConstructionSafetyAs-sociation,inthedevelopmentofsafetystandardsandregulationsasitpertainstoScaffolding,Swingstages,FallArrestSystems, and Forming and Shoring. The most recent changes to the O.H.& S. code and regulations reflect this important association.theAlbertaChaptercurrentlyhas24members,andatthemostrecentGeneralMeetinginApril,therewere16attendees.Thisrepresentsalargepercentageofourmembership.Wewouldliketowelcomeourlatestnewmember,PERIFormworkSystemsInc.Atthelastmeeting,themembershipagreedtoanamechange.TheAlbertaChapterwillnowbeknownasthe“West-ernCanadaChapter”.WhilethereisnointentonusurpingtheB.C.organization’sautonomy,werecognizethattheB.C.Chapter is undergoing some difficulties, and we would welcome the input from any member of that organization as we goforward.WewillalsoseekoutandwelcomecompaniesfromSaskatchewanandManitobatobecomemembersoftheWesternCanadaChapter.TalkswiththeNationalCouncil,willcontinuearoundthissituation.Aswell,atthistime,weareworkingwiththeACSAinupdatingtheAlbertaScaffoldManual.Thisislongoverdue,andallCompaniesintheac-cess business in Alberta can benefit from this effort.themembershipoftheAlbertaChapterrecognizestheneedforastrongerNationalorganization,andtothisend,haveappointedtwomemberstotheNationalCouncil.TheyareRonMombourquetteandScottRichardson.theProvincesofB.C.andAlbertahaverecentlysignedanagreementwhichwillmakeitmucheasierforcompaniesandworkerstomovefreelybetweenthetwoprovinces,toworkand/orconductbusiness.Asaccessproviders,weshouldbeworkingtowardsstandardsintraining,safetyandtechnicalrequirements,thatwouldbethesameacrossourcountry.Weall have the same interests at heart, and simplification and standardization should be a goal of the National SIAC.thenextmeetingoftheWesternCanadaChapterwillbeJune20th,whichisourregularsummermeeting/golftourna-ment.ItwillbeheldintheRedDeerarea,andthedateissubjecttomodestchangedependingupontheavailabilityofasuitablelocation.AnymembersofanyChaptersthatmebeinterestedinjoininguswouldbemorethanwelcome.ShouldtherebeaninterestinmoreinformationregardingtheSIAC,WesternCanada,pleasecontactWendyLarisonofUrbanScaffoldingat780-452-5950.

Alberta Report

6

By Red Armstrong, SIAC, Alberta Chapter


JULY 2007 7

Accident Information

Another Workers Fatality, June 22, 2007

Window washer dies after eight story fall Last updated on: 6/15/2007 6:52:01 PM by Dan Haggerty

lEE CouNty:AworkercleaningwindowsatSanibelHarborResortdiedFridaymorningwhenhefelleightstories.TomKottwastraininganotherworker,MartyGasber,whentheaccidenthappened.Thetwomenwereontheroofaround8:30a.m.GasbersaysKottleanedbackofftherooftostartcleaningthewindows.Hesaysthesafetyharnessesweren’tproperlyhookedupandtheemergencysafetylinenevercaught-Kottfelleightstories.“Ithappenedprettyquick.Hewentoverthesideandjustwentstraightdown.Hetriedtograbtheropeswithhishandandhisweightandthespeedwasjusttoomuch.Iwatchedhimgoover.Isawhislifelinegoingandgoing.Iwaswaitingforittocatchbuthejustwentstraightdown,”saidGasber.HerushedtothegroundandstartedperformingCPRonKott.Emergencycrewsshowedupminuteslaterandpronouncedhimdead.It was Gasber’s first day on the job.“Hewastrainingmetoday,andI’mthinkinghedidn’tpayattention.Hefailedtoconnecttotherightringonhissafetyharness,”saidGasber.Accordingtothetrainee,Kotthadbeenawindowwasherformorethan30yearsandlivedinthearea.Kott’sbestfriend,WilliamNegron,sayshehasbeenonthephonealldaygivingotherfriendsandfamilymembersthegrimnews.“Myphonehashavebeenringingleftandrightwithfriendsandfamilymembersthataretryingtogetintouchwithwhat’sgoingonhereinFortMyers,”saidNegron.“Hehadbeenonhigherskyrisesbiggerthanthatandhehadnofearofheightsheknewhisjob.”HewastheoperationsmanagerforOrangeCleaningService.

Etobicoke Ironworks Limited141-163 Rivalda Rd. Weston, ON Canada M9M 2M6T. (416)742-7111 F. (416)742-2737

www.eiw.ca

Manufacturers of:* Total Scaffold System (TSS)

* Standard Frame Scaffold* Shoring & Forming Systems* Grandstands/Bleachers

Fabricators & Erectors of:* Structural Steel* Miscellaneous Metals

®

Scaffold Distributor Inquiries Always WelcomeFor more information on our products & services please contact us: [email protected]

SIA Cention Exposi

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tionng

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Lo Beac Cul 18 - 9th 007

J y th 1 , 2s us t y r s pos ion

Vi it at his ea ’ Ex itBoot #3h 09

By Garry Bilodeau, SIAC, BC Chapter

MILLS CONSTRUCTION PRODUCTS INC.www.mills-scaffold.com

13904 Hurontario St., Caledon, ON L7C 2B8 tel: (905) 451-9471 fax: (905) 838-4059

P R O P R I ETA RY • PAT E N T E D • P R OV E N

U.S. Patent No. 5,411,113; 5,868,223; 5,143,173 Cdn. Patent No. 2,073,648; 2,153,574; 2,057,615

Mills Construction Products is dedicated to consistently providing technologically advanced scaffold

and shoring systems of aluminum and steel. All of which are user-friendly, safe, rugged, efficient

and of the highest quality.

Versa™ System Scaffold was designed using a patented reverse wedge and elastic mouthpiece.

This design has many advantages and is compatible with other rosette systems.

The Versa™ Bleacher System, when used in conjunction with Versa™

System Scaffold and Versa Light™ Plank System offers the versatility

of custom applications. This system is proven and reliable and offers

a wide variety of uses including special events and theme parks.


JULY 2007

Wicked:TheMusicalfromUni-versalStudiosJapan.

‘Wicked:TheMusical’projectpresentedbyJapan’sUniversalStudiosutilizedMills’patentedVersa™steelsystemsscaffold.Thisprojectincorporatedbothstandardandnon-standardcomponents,includingcustomdesignedcomponentsforspanningbaysupto16feetinlength.ThecompletesystemthatMillsdesignedfor‘Wicked’hadtobepowder-coatedblacktoensurethatthesub-structureblendedintothesetwithoutbecomingasource for reflect-inglight.

Supplyingthestagefor‘Wick-ed:TheMusical’involvedJustInTime(JIT)manu-facturingwhichrequiresinno-vativescaffolddesignsusingseveralcustomandpreciselyfab-ricatedVersa™components(e.g.trusses,stan-dards,ledgersandbracing). Theentirescaffoldsystemalongwithsetwasfullyassembledpriortobeingshipped abroad ensuring proper fit and systemfunction. By owen lubinski Mills Construction Products Inc. www.mills-scaffold.com

Wicked the Musical Project

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JULY 2007 10

ThemainfocusintheScaffoldIndustrymagazines(bothAccess CanadaandScaffold Industry)isscaffolding.Butmanyofusgetinvolvedinshoringorfalseworkaswell.It’sprobablynotabadideaforustointroducethebasicsof

shoring,asitwasscaffoldframes,originally,thatwereusedforsupportingconcrete.Thestartingplace,obviously,isthedepthoftheconcreteslabtobesupported.Concreteweighsabout23.5kiloNewtonspercubicmetre.Thatmeansthatonesquaremetreofconcrete,1metrethick,hasamassof23.5kN.Iftheconcreteis200mmthick,thenithasamassof200/1000x23.5=4.70kN.It’sstill1metresquare,sothepressuretheconcreteap-pliestowhateverissupportingitis4.70kNpersquaremetre.ManyofusaretoooldtounderstandthedifferencesbetweenMassandWeight.Togetthisunderstanding,weneedtocompareafewpoints: 1) Massisameasurementoftheamountofmattersomethingcontains,whileWeightisthemea-surementofthepullofgravityonanobject. 2) Massismeasuredbyusingabalancecomparingaknownamountofmattertoanunknownamountofmatter.Weightismeasuredonascale. 3) TheMassofanobjectdoesn’tchangewhenanobject’slocationchanges.Weight,ontheotherhand,doeschangewithlocation.Inotherwords,ifwegotothemoon,weweighalotlessbecausethemoonhasmuchlessgravitythanearth,becauseit’ssmaller.Butwedon’tchange,westillhavethesameamountofmass.CarryingonwiththetopicofShoring,wealsohavetoconsider“LiveLoad”whichistheweightofthework-ers and tools that will be used in pouring and finishing theconcrete.Thevalueforthis“LiveLoad”is2.4kN/m2,whichincludes0.48kN/m2fortheself-weightoftheformwork.Thetotalloadtobesupportedthen,fora200mmthickslab,is4.70+2.4=7.1kN/m2.Thenextstepistoconsiderwhat’sgoingtobeusedtosupporttheconcrete.Inmostcases,it’sgoingtobeasheetofplywood.Plywoodmanufacturersprovidechartsorgraphsthattellhowfarapartthesupportsmustbefortheplywoodtoholdupvariousthicknessesof concrete, and have a limited amount of deflection of theslabsurface.Formostapplications,weuse19mmthickplywood.The first graph in this article is for COFIFORM-Plus plywood(partoftheCOFIFORMChart),laiddownsothatthegrainonthefaceoftheplywoodisatrightanglestothedirectionofthesupports(joists),anddeflection of the plywood is limited to 1/360 span. It’s important that we know that if the grain of the plywood is in the same direction as the joists, then the joists need to be placed closer together. Continued on Page 15

Let’s Talk about ... ShoringBy John Rosenthal, P. Eng. [email protected]


JULY 2007

HydroMobile,Canadianmanufacturerofmastclimbingworkplatforms,organizesits50thtrainingseminarinitsoffice of L’Assomption, Quebec.

AsmastclimbingworkplatformsbecomemoreprevalentinNorthAmerica’sconstructionindustry,additionalattentionneedstobepaidtothistechnology’sproperuse.Infact,becauseofconcernsregardingthemisuseofthemachines,theindustryiscurrentlylookingforstandardstomakesurethatoperatorsusethisaccessequipmentinasafemanner.HydroMobile,L’Assomption,Quebec,didnotwaitforstandardstobeelaboratedandhasalreadysethisown.ApioneerintheNorthAmericanmarketofmastclimbers,HydroMobileisalsoconsideredaprecursorwhenitcomestotrainingand safety issues by developing a training program and a certification process for workers operating its platforms in the 1990s.“Ourmastclimbersarerelativelyeasytouse,andtheyprovideasafeworkingenvironment”,saidTrainingDirectorGabrielDaigle.“However,evenwiththebestproducts,thekeyfactorforsafetyintheconstructionindustryremainsthequalifications, experience and training of the responsible persons.” For this reason, the company has created a dedicated structurecalledHydroMobileUniversity.“WealsoorganizetrainingtoursthroughoutNorthAmericaandprovideourclientswithtrainingDVDs.Overall,morethan5,000personshavebeentrainedbyHydroMobileinthepast10years”,heconcluded.HydroMobileheldits50thtrainingseminarinMay.StudentsfromalloverNorthAmericagatheredforathree-daypro-gram. A testing process ratified their proficiencies so they could obtain a competency card that allows the attendees to erect,operateanddismantleaHydroMobilemastclimber.Someofthe35studentsweretrainedtolatertrainotheroperators,suchasDonaldWalkeroftheInternationalUnionofBricklayers.Hesaid,“Trainingmasonsonsecurityissuesisofhighimportanceandwhatthisseminarreallyfocusedon.I’llpassalongwhatHydroMobileUniversitytaughtmetomakesurethatmytraineescanusetheirmastclimbersprop-erly.”PaulContrino,HenryJ.KnottMasonryInc.,offeredhisobservation.“HydroMobileUniversitygavemealltheknowl-edgeIneededtousemymastclimbersproperlyandtopreventaccidentsandinjuriesformeandmycol-leagues.Ialsolearnedhowtooptimizetheadvantagesofthisaccessequipment.Ihavenodoubtthatthisinformationwillgivemycompanyatruecompetitiveadvantagewhenbidingagainstothercontractors.”HydroMobileisaprivatelyownedcor-poration.Thecompanyismainlyinvolvedinthedesign,manufac-turinganddistribu-tionofmastclimbingworkplatformsfortheconstructionindustry.HydroMobileplat-formsaredistributedthroughoutNorthAmericaandEuropethroughawidenetworkofdistributorsthatarerecognizedaskeyplayersincon-structionequipmentsalesandrental.Withover5000platformsonthemarket,HydroMobileisunquestionablytheleaderoftheindustry.

Hydro Mobile’s 50th Training Seminar

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JULY 2007

Ontario Chapter- 2007 AGM

AttherecentAGMIwashonoured(andsurprised!)toreceivethePresidentsAward,anHonorarymem-

bershiptotheSIAC.Ididnotreallyhavetimetothinkonmyfeetatthemeet-ing,inthankingtheAssociationforthisawardsoIwanttosayhowpleasedIwastoreceivethis.IhavebeenPresidentoftheAssociation,NationalDirec-torandSecretary(moretimesthanIcaretomention)andovertheyearshavemademanyfriendsintheIndustry.TheAssociationishealthiernowthanatanytimeIcanrecall,wearedoingsomegreatthingsandIampleasedto be serving another term under a terrific president John O’HaraandaverystrongBoardofDirectors.InparticularIwouldalsoliketoacknowledgetwogentle-menwhohavebeensosupportivetomepersonallyandwithintheAssociationformanyyears,AlSquireandJohnO’Hara.Finally,notforgettingHaroldForbeswhowouldbethrilledattheprogresswearemaking.Bestregards,Chris Earnshaw

theOntarioChapterAnnualGeneralMeetingheldinlateAprilinTorontowasverywellattended.Mem-

bersenjoyedacasualbreakfastandget-togetherpriortopresentationsfromPeterKingonStrategicPlanandStephenPikeonthewebsitewhichwerewellreceivedtogetherwiththeannualreportsfromMikeVanVolsen,FinanceandanoverviewfromJohnO’Hara.

ThecurrentBoardofDirectorswasre-electedwiththeadditionofJamesWilkinson.Thereweresomechangestocertaincommitteechairsandthesecanbefoundinsidethemagazine.

AlsoannouncedwastheintroductionofThePresidentsAward, the first recipient being Chris Earnshaw for his outstanding,steadfastcontributiontotheSIACOntarioChapterduringthelast20years. John o’Hara President SIAC ontario Chapter

Bill Nasrala receives an Honorary Associate Membership

Jim Wilkinson receives an Associate Membership for Hite Engineering Corp.

Chris Earnshaw receives the Inaugural President’s Award

Thank you Note to SIAC

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JULY 2007

Ontario Chapter- 2007 AGM

President John O’Hara delivering the Annual Report

Peter King delivering the 2007 Strategic Plan

National Director Stephen Pike - Website Presentation

2007 AGM- Toronto, Ontario

2007 AGM - Toronto, Ontario

Fall Protection Meeting

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JULY 2007

By John Rosenthal, P. Eng. [email protected]

Thetotalweight(W2)tendingtotipthescaffoldtotherightis250+25+66.67=341.67lb.Wecanconsiderthatallofthisweightactsinthemiddleofthesidebracketplatform.Ifthesidebracketis20incheswide,thentheweightactsatadistanceof10inchesor0.83feettotherightoftheright-handscrewjack.Thetotalforcetendingtotipthescaffoldtotherightis341.67x0.83=284.73lb-ft.Therestofthescaffoldisresistingthetippingaction. Awalk-throughframeweighsabout60lb.Twoframes,then,weigh120lb.Thereare5planksacrossthedeck,sotheweightoftheplanksis5x6.67x5=166.75lb.Wealsohavetwo4x7crossbraces.Theyweighabout10lbeach,or20lbtotal.Wecan’tconsidertheweightofthescrewjacks,becausetheyarenotattachedtotheframe.Theframelegcanslideup(ordown)overthescrew. Thetotalweight(W1)tendingtopreventthescaffoldfromtippingis120+166.75+20=306.75lb.Again,wecanconsiderthatallofthisweightactsinthemiddleofthescaffold.Iftheframesare5ftwide,thentheweightactsatadistanceof2½fttotheleftoftheright-handscrewjack. Thetotalforcetendingtoresistoverturningis306.75x2.5=766.88lb-ft. SowehaveaFactorofSafetyof766.88/284.73=2.69.Thatdoesn’tsatisfytheregulations!Weneedtoaddmoreweighttothemainpartofthescaffold TogetaFactorofSafetyof4,theforcetendingtoresisttippingmustbe341.67x4=1,366.68lb-ft.Weknowthattheweightofthescaffoldisactingat2½ftawayfromthescrewjack,soweneed1366.68/2.5=546.67lbtotalweightonthemainscaffoldside. Wealreadyhave306.75lb,soweneedanadditional546.67–306.75=239.92lb.Ifwecanplacealoadofsomesortthatweighs240lbontheplatformofthescaffold,wewillhaveourrequiredFactorofSafetyfortheworker. Ifthescaffoldwastwoframeshigh,withbothlevelsplanked,we would have more than sufficient weight to protect the workerwithouthavingtoaddmoreweighttothescaffold. Inthiscase,wehaveexactlythesameinformationasbefore,butwenowhave2additionalframes,twomorecrossbracesand5moreplanks.Theyweigh(2x60[frames])+(2x10[brac-es])+(5x6.67x5[planks])=306.75lb. Thetotalforcetendingtoresistoverturningis306.75[level1]+306.75[level2]x2.5=1533.75lb-ft. SowehaveaFactorofSafetyof1,533.75/284.73=5.39.

Continued from Page 5

Cantilevered Scaffolds

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JULY 2007

Thereisanotherchartforplywoodlaidsothefacegrainisparallelfwelookupthelefthandsideofthisgraphforavalueof7.1kN/m2,wehaveto“guess”atapositionjustbelowthethirdlinefromthebottom(whichwouldrepresent7.5kN/m2).BecausewehaveaSafetyFactorof2½,wecanprobably“getaway”withjustusingthat7.5kN/m2line.Ifwedothat, we follow the line across to the right to find where it meets one of the curves representing the thicknesses of plywood thatthegraphdisplays.We’reusing19mmplywood,sowe’relookingfortheplacewherethatlinecrossesthesecondcurvedown.Theintersec-tionisatorneartheverticallinejustleftof700,indicatingthatthejoistsshouldbespaced675mmapart.Nowthattheconcreteissupportedbyplywood,andtheplywoodissupportedbyjoists,wehavetobringinthestrengthofthejoistmembers.

Ifwe’reusing165mmaluminumbeamsasjoists,thenwemustobtain,fromthebeamsupplier,aloadingchartforthetypeofbeamwe’reusing.Wewanttouseasmuchofthebeamcapacityaswecan.Eachbeamissupporting675mmofplywood,whichinturnissupportinga675mmwidebandof200mmthickconcreteaswellastheliveload.Thistotalloadhasavalueof675/1000x7.1kN/m2=4.8kNperlinearmetre.tothejoists.Nowwelookatajoistloadingchart(Thisoneissimilartoarealload/spanchart,butthesevaluesareimaginary).Foraloadof4.8kN/m,wecanspanabout2.8metres.Morethanlikely,we’regoingtobespacingourframeswith2.13mbraces,sowe’rewellwithintheallowableloadcapacityofthejoists.Byinstallingourstringers2.13maparttosupportthejoists,wecannowworkoutwhatsortofspacingwecanuseforsupportingthestringers.We have to find out what spacing the stringers need to be set at. Again,ifwe’reusing165mmaluminumbeamsasstringers,we

workoutthateachstringernowissupportingastripofslabthatishalfof2.13mwide,plushalfthedistancetothenextstringer.Theloadonthestringeris2.13x4.8=10.2kNimposedatevery675mmalongthelengthofthestringer.Ifwehave10.2kNatevery675mm,thatworksouttoanequivalentloadof15.1kN/malongthelengthofthestringer.Thesamememberthatweusedasajoistcansupportthisloadonamaximumspansomewherebetween1.8mand2m.Shoringframesareusually1.2mwide,sotheframeswouldhavetobesetat1.9mapart,andwewouldusestringers3.1mlong.Thenextstepistoverifythestrengthoftheframesforthiskindofload.Eachframelegisgo-ingtobesupporting0.6m(halfthewidthoftheframe)plushalfofthe1.9mspan,oratotalof1.55mlengthofconcreteby2.13mwidth,or3.3sq.m.ofconcretewithamassof7.1kN/m2=23.44kN.Generally,shoringframeshavearatedcapacityof44.48kNperleg.ThisisbasedonaFactorofSafetyof2.5:1.Thatmeansthatyoucouldactuallyapplyaloadof111.2kNoneachlegofthescaffoldbeforeitwillfail.Ifweapply23.44kNoneachlegoftheframe,thatmeansthatwe’reactuallyworkingwithaFactorofSafetyof111.2/23.44=4.74).Inordertofullyloadtheframelegs,wewouldhavetohavestrongerstringers,andwe’dusedifferentspacing.

15

Continued from Page 10

Let’s Talk about ... Shoring


JULY 2007

ActionScaffoldServicesaleadingfullscaffoldservicecompanyisseekingaprofessional,energetic,resultsdrivenindividualwhocanrespondtothechallengeofdevelopingthescaffoldsalesandrentalmarketinSouth-ernOntario.

With a minimum five years experience in the scaffold or construction related industries, you have a proven successfultrackrecord,possessexcellentcommunicationskillsandideallyhavetheabilitytoestimatescaffoldprojects.Yourmotivationcombinedwithourcommitmenttocustomerserviceandmarketexpansionmakesthisanexcit-ingopportunityfortherightindividual.Weofferacompetitivesalary,commissiononresults,expensesandcarallowance.

Pleaseemailresumetojean.gelinas@actionscaffoldservices.comorfaxtoJeanGelinas-(905)6738151

Scaffold Salesman - ontario

MIllS ConstructionProductsuniqueengineeringoffersversatilityandstrengthfortheVersaLight™aluminumsystemscaffold.TheVersaLight™allaluminumsystemscaffoldhasalightweightadvantagewhichallowsfor

reduced worker strain and faster assembly and disassembly thus resulting in a safer, more efficient system scaffold.Alignment ribsMills’standards,sleevesandrosetteshaveinternalandexternalalignmentribswhichprovideprecisealignmentandthusensuringplumbandsquarescaffoldunits.Picturethestandardasbeingtheprimary column,therosettesleeveasthesec-ondarycolumnandtherosetteitselfasthetertiary column.(See photo below).ledger Extrusion Ouruniquepatentedaluminumledgerextrusionprovidesgreaterstrengthathalftheweightofasteelunit.Itsserrated,non-sliptopandbottomsurfacesaidhandlingandpreventstheslippageofseatedplanks.Theproprietarylockingfeatureofthemouthpieceprovidessuperiorrigidityandalignmentoftheledgerandbaybraceassembly.Elastic MouthpieceOurhighstrength,elasticmouthpiece,availableinaluminumorsteel,usesapat-entedwedgepinwithareverseslope.Thewedgepinengagestherosetteentirelythroughitsverticalsurface,ensuringthatthemouthpieceisproperlyseatedontherosetteensuringitwillnotriseorslipupasinothersystems.Thecompres-sionareaofthemouthpiececonnectorisdramaticallyincreasedbecausethelobesarereversed,therebyprovidingagreatermassareaatthebottomofthemouth-piece(belowtherosette)whereitcountsmost.CompatibilityTheVersaLight™aluminumsystemisfullycompatiblewithsimilarsteelsys-tems.

[email protected]

Mills Patented Versa Light™ Aluminum System Scaffold

16


JULY 2007

System Scaffold History CSA does not specifically address System Scaffolds. The test procedure detailed in thecurrentstandardCAN/CSAS269.2-M87AccessScaffoldingforConstructionPurposes,wasadoptedfromanearlyversionoftheSSFI(Scaffolding,ShoringandFormingInstitute)RecommendedProcedureforCompressionTestingofTubularWeldedScaffoldFrames(backinabout1974).TheSSFIhasissuedanupdatedStandardforTestingandRatingScaffoldAssembliesandComponents,sothisisthedocumentthatoughttobefollowedwhentestingSystems.Inordertoensurethatthescaffoldsyouareusingaresafe,andcomplywiththerequirementsoftheCSAStandard,thesupplierofthescaffoldshouldbeabletopro-videacopyoftestreport(s)identifyingtheratedcapacityofthescaffold.Manyyearsago,theScaffolding,ShoringandFormingInstitute(SSFI)developedatestprocedureforratingscaffoldframeswhichwasultimatelyadoptedintoCanadianStandardCSAS269.2.The test configuration was defined as a free-standing 4-leg tower, three lifts high, bracedintheusualmanner,withscrewjackstopandbottomextended300mm(12”)beyondthelegsatthebottom,asshowninthesketch.Thetoweristobeerectedinsuch a manner as to simulate field conditions and aligned vertically so that it is not outofplumbmorethan1/8”inthreefeetandnomorethanthediameteroftheleg.Nogreaterattemptsshouldbemadetoadjustthecomponentsconcentricallythanwouldbeexpectedinactualuse.

testing ApparatusThetestapparatusisrequiredbyCSAtobeeitherastandardtypeofcompressiontesting machine or a testing rig manufactured specifically for the purpose of testing scaffolding provided that the rig com-plieswithrequirementssetoutintheStandard.

System Scaffold testing - SSFI Procedure loadingA1.Theloadshallbeapplieddirectlyontheloadbear-ingmembersbyuseofloadtransferbeamsorcrossheadoftestingmachine;ordirectlybyhydraulicjacksinanappropriate testing apparatus or fixture.

A2.Thefourlegsofthetesttowershallbeloadedsimultaneouslyuntiltheultimateloadofthestandards(Pult)isreached.Determinetheallowablelegload(Pall)for this configuration (and for use in the “B” and “C” seriestests)bydividingtheultimatestandardloadbythefactorofsafety.

A3.Thesystemscaffoldtowershallbesubjectedtoincreasingloadsuntiltheultimateloadisreached.

A4.Theallowablelimitsforrateofloadingonsystemscaffoldtowersshallnotbelessthan5,000lbs.permin-utenormorethan10,000lbs.perminute.

A5.Therateofloadingineachtestshallremaincon-stant.TheSSFIsuggeststhatadditional(optional)testsoughttobecarriedout.

Product Testing, Second in a SeriesBy John Rosenthal, P. Eng. [email protected]

18

System Scaffold in test tower


JULY 2007

“B” Series tests (optional)B1.Afterconductingthe“A”seriestest(asdescribedabove),standardsshallbetestedonebaywideandtwobayslong,composedof6verticalstandards,bythreeliftshigh.Thesystemscaffoldcomponentsshallbeerectedintheaboveconfiguration with adjusting screws extended to 12 inches beyond the standard on the bottom and with horizontals and diagonalsinstalledasshowninthefigure below.

B2.Thesixstandardsofthetestconfiguration are to be loaded to theanticipatedallowablestandardload(Pall),asdeterminedinthe“A”seriestest,andheldatthatvalueforoneminute.

B3.Loadingshallbecontinuedonthetwostandardsinthecenterofthebaysuntiltheultimateloadofthestandardsisreached.Theul-timateloadofthecenterstandardsshallbetheultimatestandardloadforthesystemscaffoldusedinthismanner.Determinetheallowablestandardload(Pall)forthiscon-figuration by dividing the ultimate standardloadbytheappropriatefactorofsafety.

C” Series tests (op-tional)C1.Afterconducting“A”seriestest,standardsshallbetestedtwobayswideandtwobayslong,com-posedof9verticalstandards,bythreeliftshigh.Thesystemscaf-foldcomponentsshallbeerectedin the above configuration with adjustingscrewsextendedto12inches beyond the standard on the bottom and with horizontals and diagonals installed as shown in the figure below.

C2. The nine standards of the test configuration are to be loaded to the anticipated allowable standard load (Pall), as determinedinthe“A”seriestest,andheldatthatvalueforoneminute.

C3. Loadingshallbecontinuedonthestandardinthecenterofthebaysuntiltheultimateloadofthestandardisreached.Theultimateloadofthecenterstandardshallbetheultimatestandardloadforthesystemscaffoldwhenusedinthis manner. Determine the allowable standard load (Pall) for this configuration by dividing the ultimate standard load by theappropriatefactorofsafety. Personally, I think that the SSFI “B” and “C” Series tests are too awkward and complicated, as well as having the potential of destroying far too much equipment in order to get the required results. If a nine leg tower is construct-ed, the centre standard can be connected to braces and ledgers in such a way as to represent any standard within a “birdcage” scaffold. to my mind, that is the best way to determine the load-carrying capacity of any standard. However, the “authorities” have not accepted my viewpoint.

Product Testing, Second in a Series

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JULY 2007

test reportCSArequiresthatthefailureloadandanytypeofdeformation,suchasbuckling,istoberecordedaswellastheloadatwhichthedeformationbegantotakeplace.Atestreportmustbeissuedwhichhastoincludethefollowingmajorparts:

(a) adescriptionofthetestapparatus,includinganynecessarysketches,drawings,orphotographs;

(b)description(s)ofthecomponent(s)tested,includ-ingdimensionsandweightsofthecomponentmembers;

(c) speci-fications of the component(s)tested,in-cludingspecification(s) oftheappli-cablematerials;

(d) ade-scriptionoftest-ingprocedureandanyspecialconditionsthat,ifdifferent,wouldaffecttheresultsofthetests;

(e) atableoragraphrep-resentingthetestresults;

(f) theul-timatecapacityofthecompo-nentorassembly;

(g) thesignatureoftestsupervisor;and

(h) verification of the test results by an independent professional engineer, who witnessed the test and certified the accuracyofthetestreport. North American manufacturers generally have test facilities available to them, but they are not likely to test equip-ment for anyone but themselves. It is getting more difficult to get schools, like the University of Toronto, to carry out testing for us, due to the demands of students and faculty. Engineers in the scaffolding business can usually make some sort of arrangement to get equipment tested, but it can be quite expensive. However, it is important that all scaffolds are tested to determine their rated capacity.

Product Testing, Second in a Series

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JULY 2007

thefollowingaresomecommonsenserulesdesignedtopromotesafetyintheconstructionofscaffolding.Theseguidelinesdonotpurporttobeall-inclusiveorreplaceotheradditionalsafetyandprecautionarymeasures.Theyare

notintendedtosupersedetherequirementsofanyprovincialregulations,codesandordinances.Theusershallberespon-sibletocomplywithallrecognizedprovisions.Wherepossible,posttheCodeofSafePracticeinaconspicuousplaceandensurethatallpersonswhoerect,dismantleorusescaffoldingareawareofthese.Itisrecommendedthattheseinstruc-tionsarethesubjectoftoolboxmeetings.trAININg Workersmustbeproperlytrainedorinstructedbeforetheyuseequipment.Onlycompetentworkersmayconstructscaf-folds.INSPECtIoN Inspectallequipmentbeforeusing.Neveruseanyequipmentthatisdamagedordefectiveinanyway.SItE EvAluAtIoN Whenpossible,alwayssurveythejobsitetoidentifyanypotentialhazardcondition.Completejobsitehazardevaluationand amend your standard fall protection plan with site-specific requirements. FouNdAtIoNSNeverconstructascaffoldonunpreparedfoundations.Wherenecessary,provideadequatecontinuouswoodsillsanden-surethattheyarenotlessthan50mmx250mm(2”x10”)andcovertwoframelegsinlength.Footings,sillsorsupportsmustbecapableofsupportingatleast2timesthemaximumloadtowhichtheyaresubjectedwithoutsettlement.Anypartofabuildingorstructurethatisusedtosupportthescaffoldshallbecapableofsupportingthemaximumintendedloadtobe applied, and must be verified by a professional engineer. BASES Alwaysuseadjustablebaseswithsystemscaffoldsandothercomponentsthatthemanufacturerrecommends.Levelthebasebystartingatthehighestpointofgroundlevelandensureaccuracy,asyoudonothavetolevelthescaffoldafterthebasehasbeencompleted.StANdArdS Standardsaremanufacturedinpre-determinedlengthsandthespacingofstandardsisdependentupontheloadingtobeimposedonthescaffold.Alwayscheckloadingrequirementsandifnecessary,seekapprovedengineereddrawings.lEdgErS Connecttheledgerstothestandardatthedesiredliftheightbypositiveconnection.Ledgersaremanufacturedinpre-de-terminedlengthsandthebaysizeisnormallydeterminedbyloadingcriteria.Theverticalspacingorliftheightbetweenledgersshouldnotexceed1.98m(6’-6”).Anyledgerthatislongerthan1.52m(5’-0”)andissupportingaload,shouldbeadoubleledgerorequivalent.BrACINg – Internal (a) Asbracinghasapredeterminedlength,selectthecorrectsizeofbracing,andbracestandardsinternallyevery6m(20’-0”)inlength,andensurethatbracingextendstothefullheightofthescaffold.BrACINg – Sway (b) Swayorfaçadebracingshouldbeinstalledontheoutsidefaceofthescaffoldtofullheight,andcanbeeitherinonesinglebayorextendedacrossmultiplebays.Ifsinglebaybracingisselecteditmustbeinbothendbaysandatleastevery15m(50’-0”) longitudinally. In the multiple-bay configuration, the desired angle is 45° to the horizontal, close to the node point,andthisshouldbecontinuoustofullheight,andinmanycaseswillbedesignedbyanengineer.BrACINg – Plan (c) Planbracing(horizontaldiagonal)isrecommendedandisoftenrequired.Asaminimum,itshouldbeinstalledatthebaseandonthesamelevelasthescaffoldties.Work PlAtForMS Theworkplatformprovidestheworkerwithasafeenvironmentfromwhichtowork.Theworkplatformmustconsistofafullyplanked/deckedsurfaceandshallhaveguardrailsconsistingoftoprails,midrailsandtoeboardsinstalledonallopensides.Toeboardsshallbeinstalledattheedgeofallworkplatformsandshouldbeaminimum100mm(4”)high.CANtIlEvErS Cantileverplatforms,exceptfabricatedsidebrackets,mustbedesignedbyaprofessionalengineerandshallbeinstalledinaccordancewithsupplier’s/manufacturer’sinstructions.

Code of Safe Practice - System Scaffold; Ontario

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JULY 2007

SCAFFold tIES Wherethescaffoldheightexceedsthreetimesthesmallestbasedimension(3:1ratio),scaffoldsmustbetiedatleastevery4.57m(15’-0”)intervalsverticallyand6.0m(20’-0”)horizontally.Wherepossible,push/pulltiesshouldbeused,ensur-ingthatthetietubeisconnectedtobothstandards(orbothledgersnearthestandard)withrightangleclamps.Tietubesshouldbeinstalledonthesamebayastheinternalbracing.Ifitisnotpossibletotiethescaffoldtoastructure,aprofes-sionalengineermustprovidespecialdesignconsiderations.guArdrAIlS, MIdrAIlS Guardrailsmustbeinstalledonallopensidesofthescaffoldwhereapersoncanfalladistanceof2.4m(8’-0”)ormore,andshallbenotlessthan0.92m(3’-0”)normorethan1.07m(3’-6”)abovetheplatform,andshouldbepositivelycon-nectedtothestandards.Midrailsshallbeinstalledequaldistantbetweentheguardrailandtheplatform.PlANkS -- Wood Alwaysuseselectstructuralwoodplank,LVL(laminatedveneerlumber)orequivalentapproved50mmx250mm(2”x10”)lumber,ofuniformthickness.Ensurethatwoodplankextendsaminimum150mm(6”)andnomorethan300mm(12”)beyondthecentreofsupportsandshouldbecleatedatoneendtopreventlateralmovement.Woodplanksshouldnotspanalengthgreaterthan2.13m(7’-0”)unlessengineeredotherwise.PlANkS – StEEl Moststeelplankshaveasupportinghookandwindlocktopreventuplift.Ensurethatthesteelplankhasanonskidsurfaceandthattheloadcapacityratedbythemanufacturerisnotexceeded.Alwaysensurethatthewindlockisintheclosed position.MANuFACturEd dECkINgThesearenormallyconstructedfromaluminumsideframeswithaplywoodormetaldeckingandaresecuredtothescaffoldbysupportinghookswithwindlocksthatpreventuplift.Theloadcapacityofthesedecksisratedbythemanu-facturer and should be clearly identified on the deck and must not be exceeded. Always ensure that the wind lock is in the closedPosition lAddErS Laddersareusedtogainaccesstotheworkingplatforms.Ladders,laddercagesandrestplatforms,wheninstalledonscaffolds,mustconformtoallapplicablecodes,andmustextendapproximately1m(3’-0”)abovethelandingareaandbesecured.Alwaysmaintain3-pointcontactatalltimeswhenclimbing.SIdEBrACkEtS Sidebracketsmustbeinstalledatrightanglestothescaffoldandshouldbeinstalledinaccordancewithmanufacturersinstructions.Theseareanextensionoftheworkplatformandmustaccommodateatleast2planksandmustnotbeusedforstorageofmaterials.Alwayscheckmaximumloadingofsidebrackets.loAdINg Theloadonanyscaffoldmustneverexceedthesafeworkingloadthatitwasdesignedfor.Mostscaffoldsarerequiredtosupportatleastfourtimestheintendedload,howeverthisvariesindifferentjurisdictionsandmustbechecked.Whenanyunusualloadingconditionsapply,orwhentheloadexceeds3.6kN/m(75psf)thescaffoldmustbedesignedbyapro-fessionalengineer. StAIrWAyS Manufacturedmodularstairwaysareusedtogainaccesstoworkingplatformsandmustbeinstalledinaccordancewiththemanufacturer’sinstructions.ENCloSurES Ifthescaffoldhastarpaulinsoranyenclosuresystemattached,thisimposesadditionalwindloadingandthescaffoldmustbedesignedbyaprofessionalengineer. PoWEr lINES It is dangerous to construct a scaffold close to power lines. Always consult the power company for specific guidelines and conformtoallapplicablecodes.FAll ArrESt Incertainjurisdictions,unlessasafetynetortravelrestraintsystemisbeingused,workersshallwearfallarrestsystemsiftheworkersmayfalladistanceofmorethan3m(10’-0”).NotE: you must refer to the general guidelines for additional information relating to this product group.

Code of Safe Practice - System Scaffold; Ontario

22

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INDuStrIaL ScaffOLDINg cONtact LIStINg

corporate Headquarters

2505 S. main StreetKennesaw, gauSa 30144

t 678.285.1472f 678.285.1473

www.aluma.com

Scafom Canada is an international designer ,manufacturer and supplier of quality sca�olding, forming and shoring products. With over 20 years of innovative product integration and experience, Scafom continues to provide superior solutions to projects of all sizes.

Scafom continually pushes to provide safer , stronger , and more e�cient products.Whether for standard or custom applications, sales or rental,our entire team is dedicate dto �nding the perfect soluti on,for your project on timeand on budget.

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