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8 9 Steelrecyclingrates<br />

10 Oldcarsareamajorsourceofscrapsteel<br />

<strong>11</strong> <strong>12</strong> CourtofJusticeoftheEuropeanCommuni<br />

ties Luxembourg(L)2009 DominiquePerrault<br />

Inconnectionwiththeextensontheoldsteel<br />

structureofthebuildingwastakendown<br />

cleanedandassembledagain <strong>11</strong> <strong>12</strong><br />

Substructure<br />

Thankstosteel’shighstrength<br />

(HSS)toweightratio steelcon<br />

structonrequireslessmaterial<br />

thantraditonaltechnooges<br />

andcontrbutestoreducnga<br />

bulding’senvironmental<br />

impact<br />

Byreplacingtraditonalbeams<br />

50KTofHSSliketheS460M<br />

steelgraderepresentsasav<br />

ingof14KTofCO 2 (roughly<br />

theannualemissionsof<br />

4000vehicles)<br />

Superstructure<br />

Edition<br />

featuring steel<br />

2009. With contributions from<br />

Andrea Bruno, Bollinger + Grohmann<br />

Ingenieure, Michael Davies,<br />

Markus Feldmann, Federico Mazzolani,<br />

Gerard O’Sullivan, Francis Rambert,<br />

Alexander Reichel, Llewellyn van Wyk.<br />

224 pages, with numerous drawings<br />

and photos. 23 × 29.7 cm.<br />

ISBN 978-3-920034-32-4<br />

Hardcover: € 65.– / £ 52.– / US$ 91.–<br />

+ postage/packing<br />

+ VAT, if applicable<br />

∂ Development series<br />

Inspiration and techniques of steel in construction<br />

The state of the art of steel in today’s<br />

architecture. Steel is a distinctly versatile<br />

building material whose powers<br />

lie in wide-span constructions in the<br />

fi eld of civil engineering as well as facade<br />

surfacing or of high-rise houses.<br />

Steel is very trendy. This can be seen not<br />

only with the growing number of skyscrapers<br />

in Asia; the material is also increasingly<br />

used in surface design. This publication<br />

about steel in construction is aimed at the<br />

promotion of steel as favoured construction<br />

and building material giving all necessary information<br />

to enable planners and decision<br />

makers to base their project conceptions<br />

and pre- design on steel solutions.<br />

24 Chapter2<br />

SteelandSustainablity 25<br />

43 45<br />

Thecurrentgenerationof“green”buldings Thesecondrelatesto“radicalsustainable hugestridesinitseffortstoachievesustain<br />

alreadyofferssignficantimprovementsover constructon” Radicalsustainableconstruc abledevelopment mperatives(fig8)<br />

conventonalbuildings inasmuchasthey tionhasfivemajorfeatures:<br />

consumelessenergy materialsandwater; ntegrationwithlocaleco systems Forexample theCanadiansteelindustryhas<br />

providedemonstrablyhealtherlvingand Closed loopmateralsystems achieved[13]:<br />

workingenvronments;andgreatlyenhance Maxmumuseofpassivedesignand Areduction ncarbondioxide(CO 2 )ems<br />

thequaltyofthebuiltenvironment nclud renewableenergy<br />

sionsofmorethan20%since1990<br />

ingtheneighbourhood However these Optimisedbuildinghydrologccycles and Emssionsofsulphurdioxide(SO 2 )reduced<br />

improvementsareofferedthroughtheuse Full mplementationofindoorenviron by77%since1990<br />

ofexstingmaterialsandproducts design mentalqualitymeasures [<strong>12</strong>] Emssionsofnitrogenoxides(NOX)<br />

approaches andconstructionmethods<br />

reducedby24%since1990<br />

Becauseofthisconventionalapproachto<br />

Polycyclcaromatichydrocarbons(PAH)<br />

designandconstruction itremainsdifficult Theroleofsteel n“radicalhigh emssionsreducedby74%since1993<br />

to ncorporatetrulyinnovativetechnologies performancegreenbuildings” Energye ficiencyimprovedby254%<br />

intocurrentconstructionpractice<br />

between1990and2001<br />

Twoschoolsofthoughtareemergingthat Gooddesignisfundamentaltosustainable Wastegoingtolandfillreducedby52%<br />

addressthschallenge<br />

constructon Decisionsmadeattheinitial between1994and2002<br />

designstagehavethegreatesteffectonthe<br />

Thefirstrelatestohigh performancegreen overallsustanabiltyofprojects Theissues Underthedrversofmassproduction qual<br />

buldings Thecharacteristicsofhigh per tobefacedbyradicalhgh performance itycontrolandcostreduction techncal<br />

formancegreenbuldings assuggestedby greenbuildngsfavourconstructionprod progresshasledtolargeenergysavingsand<br />

FujitaResearch[<strong>11</strong>]include: uctsandmethodsthatareflexible lightand tothesystematcuseofleanandclean<br />

Optimalenvironmentalandeconomic durable: tisherethatsteelemergesasa processesinsteelplants Asaresult energy<br />

performance<br />

materal drivenconstructionsystemcapable consumptionandCO 2 generationinthe<br />

Integratedprocesses innovativedesign ofachievingtheprerequsteperformance steelindustryhavedecreased Western<br />

andincreasedefficienciestosaveenergy standards Theadvantagesencouragingthe nationshavereducedtheirrelativeCO 2<br />

andresources<br />

useofsteelincludeitscost non combusti emissionsby50%overthepast30years so<br />

Satisfyng healthy productive quality bilty resstancetomould gases mldew thattoday dependingontheageofthe<br />

indoorspaces<br />

andtermitesanditsenvronmentalfriendli plantandotherfactors CO 2 emssions n<br />

Employingleanconstructionmethodolo ness<br />

EuropeandtheAmericasaverage15to2t<br />

giesandtoolstoimprovewastemanage<br />

foreachtonneofsteelproducedfromiron<br />

mentandreducetheenvironmental Construction samajorconsumerofmateri ore Furthermore inrespectofthosefigures<br />

impactofconstructonwaste alsandresourcesandthusit simperatve theeffectoffortyyearsofrecyclinghasto<br />

Increasngtheemphasis atR&Dstage of toreduce tsresourceconsumptonandto betaken ntoconsideration whencompar<br />

whole buildingdesign constructionand maximisematerialreuse Prudentuseofnat ingwithothermaterials Wateruseinsteel<br />

operationovertheentirelifecycle uralresourcesresultsinamoreefficient manufacturehasbeengreatlyreduced and<br />

Fullyintegratedapproach including industryandarestrctedusageofnatural inmostinstanceswaterisrecycledand<br />

teams processesandsystems materals Practcessuchasmaterialrecy reused<br />

Renewalengineeringmethods cling wastemnimisation localproduct<br />

Managementandbusinesspractces resourcng landdecontamination andmni Allsteelproductionhasahighrecycled<br />

Newstandards openbuldings advance misingconstruction anddemolition waste scrapsteelcontentandallsteelisrecyclable<br />

jointingandassemblytechniques process disposalmakesoundbusinesssenseand Steelisthemostwidelyrecycledmaterialin<br />

engineering<br />

encouragegoodconstructonhousekeep theworld:manysteelcomponentscanbe<br />

Materialsandsystems:newfunction ing Applicationoftheprinciplesoflean unboltedandevenreusedforfutureappli<br />

ntegratedbuildingcomponents durabil constructonandlife cycleanalyss includ catons Thepossiblityofreusingbuilding<br />

ty abiltytorepairandretrofitcompo inglifecyclecosts(p 32ff)areequally elementsmakessteelconstructoneven<br />

nents<br />

important Thesteel ndustryitself smakng moresustainablethanthealreadysignifi<br />

63 65<br />

cantcontrbutonoftoday ssimplematerial<br />

recycling Steelcanberepeatedlyrecycled<br />

becauseitdoesnotloseanyofitsinherent<br />

physicalpropertiesasaresultoftherecy<br />

clingprocess Italsohasvastlyreduced<br />

energyandmateralrequirementscom<br />

paredwithsteelmadebyrefiningironore:<br />

theenergysavedthroughrecyclngreduces<br />

theannualenergyconsumptionofthe<br />

industrybyabout75% whichisenoughto<br />

power18millonhomesforoneyear The<br />

steel ndustryhasbeenactivelyrecycling<br />

steelformorethan150years:recycledsteel<br />

provdes40%oftheworld'ssteelindustry<br />

ferrousresources Steelrecyclingratesvary<br />

byproductandgeographicalregon:about<br />

975%ofstructuralsteelbeamsandplates<br />

wererecycledin2004and2005 whlethe<br />

forrenforcementbarstherateisabout<br />

65% Structuralsteelsectionsgenerally<br />

containabout95%recycledsteel whereas<br />

flatrolledsteelcontainsabout30%reused<br />

materalduetothedifferentprocesses<br />

involved However untilnow globalsteel<br />

demandhasalwaysexceededmaximum<br />

recyclingcapacity sothatthereisstlla<br />

needtoproducenewsteelfromironore<br />

Theuseofsteelconstructioncomponents<br />

elementsandsystemsenhancesthesustain<br />

ablityofbuildingsintermsoftheseissues<br />

andtheeconomicandsocialperformance<br />

oftheprojectinitsphases fabricationof<br />

products design erection useandendof<br />

life Thefolowngsectionisintendedas<br />

aguidetoassstprojectmanagersand<br />

designerswhowshtoadoptsomeofthe<br />

abovepro recyclingmeasuresintother<br />

projects It sstructuredaroundthefive<br />

majorstructuralcomponentsofbuilding<br />

namely substructure superstructure roof<br />

assembly servcesandfinishes<br />

Constructionchalengesinsubstructuresfall<br />

intoboththeenvironmentalprotectionand<br />

economicgrowthsectorsastheindustry<br />

hassignifcantimpacts bothpositiveand<br />

negatve onthenaturalenvronment Effec<br />

tiveprotectionoftheenvironmentispossi<br />

blethroughcontrolingandminmisingthe<br />

impactsofconstructonacoustcs airborne<br />

andotherpollutants includingpotential<br />

damagetobodiversity Constructionste<br />

controlandmnimisationofenergycon<br />

sumpton awarenessofembodedenergy<br />

improvedeconomyofmateralstransport<br />

andareductioninwaterusagealsoimprove<br />

environmentalmanagementandconserva<br />

tion Tomeettheseobjectivesrequiresthe<br />

adoptionofconstructontechnologiesthat<br />

minimsetherequirementsforon sitework<br />

ingspace supportngmaterals and<br />

machineryandequipment especallythose<br />

whchburnfossilfuelsandgeneratenoise<br />

Theultimateenvironmentalobjectiveisto<br />

avoidleavnganunwantedlegacyforfuture<br />

generations Attheendofastructure s<br />

usefullife whenasiteiscleared founda<br />

tionsaregenerallyabandonedandleftto<br />

besomeoneelse slargeimmovableprob<br />

lem Steelfoundationslikesheetpiles steel<br />

pillarsortubescanbeextracted allowinga<br />

stetobereturnedtoitsoriginalcondtion<br />

Therecoveredsteelcanbereusedorrecy<br />

cled Duringinstallaton drvensteelpilesdo<br />

notproducespoilandrequrefarfewer<br />

vehclemovementstotakemateralo fste<br />

(figs <strong>11</strong>and<strong>12</strong>)<br />

Besidethefactthatsteelstructures being<br />

lighter generallyrequiresmallerfounda<br />

tions steelmayalsoreduceproject mpacts<br />

inotherways Steelconstructon because<br />

itcanbeprefabricatedtomeetthespecific<br />

requirementsofeverycomponentofthe<br />

project reducestheamountofworking<br />

spacerequiredon site Joints penetrations<br />

andholesarepre drilled reducingthe<br />

extentofworkon siteandtheamountof<br />

machineryrequired Wheretheconstructon<br />

methodreliesmanlyonboltedjoints nui<br />

sancenoisefromthesteisreduced Prefab<br />

ricatonalsofaclitatesjust in tmedelivery<br />

removngtheneedtostoreorstackvast<br />

quantitiesofconstructonmateralsandfur<br />

therreducingtheextentofthesiterequired<br />

forpreparatorywork Atypicallightsteel<br />

framedhousewthlightweightcladdng<br />

weghsapproxmately30t(excludingfoun<br />

dations) incomparisonto100tforabrick<br />

andblockworkhouse Thisdifferencehas<br />

alsoagreat mpactonsitetransportand<br />

logistics<br />

Thedemandsplacedonbuildingscan<br />

changeforahostofreasons perhaps<br />

Designing steel structures<br />

The basics of construction<br />

The 21st century paradigm –<br />

High Performance Green Buildings<br />

The economic benefi ts of steel<br />

in construction<br />

Steel products and fabrication<br />

www.detail.de/f-steel

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