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Transcript of Greenleaf Manual
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Urban tree design guideEdition 7
GreenleafUrban tree and landscape products
UniclassL8144
(90.4)
CI/SfB
W
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Sales and service: 01424 717797Technical assistance: 01424 433233Sales Fax line: 01424 533003Email: [email protected]: greenleaftrees.co.uk
Design Guide Trees in the urban environment (Edition 7)
GreenleafGreenleaf
1 l Overview Companyprofile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 .01 Sustainability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 .03 ForestvCity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 .05 Howtousethisdesignguide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 .07 Thebenefitsofurbantrees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 .08 Treesandclimatechange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 .11 Identifyingopportunitiesforurbantreeplanting . . . . . . . . . . . . . . . . . . . . . 1 .12 Theprocessofsuccessfultreepitdesign . . . . . . . . . . . . . . . . . . . . . . . . . 1 .14 Pitfallsandchallenges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 .16
2 l Products Arborsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 .01 Rootmanagementproducts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 .02 Treepitirrigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 .13 Soilstructuresystems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 .23 Guyingandties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 .33 Treegrillesandguards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 .41 ArboresinandPrecastArboresin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 .52 Arborflowtreesandsustainableurbandrainagesystems . . . . . . . . . . . 2 .57
3 l Projects Casehistoriesandprofiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 .01
4 l Installation Treeproductpackages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 .01
5 l Information and support Research . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 .01 Specificationsupportservice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 .03 ArborsystemCDinstructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 .05 NBSPlus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 .07 Arborsystemapprovedinstallers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 .09 Treesintheurbanenvironment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 .13 Streetsandsquares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 .14 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 .19 Frequentlyaskedquestions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 .21 Environmentalpolicy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 .26 Howtoorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 .27
6 l Data sheets Technicalinformation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 .01
7 l Index
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Sales and service: 01424 717797Technical assistance: 01424 433233Sales Fax line: 01424 533003Email: [email protected]: greenleaftrees.co.uk
Design Guide Trees in the urban environment (Edition 7)
GreenleafGreenleaf
Com
panyprofile
1.01
Companyprofile
Foundedin1992,Greenleafwassetuptoresearchandprovidesolutionsforassistingtreesintheirbattletoestablishinurbanspaces .
Withthegoalofdrasticallyimprovingurbanplantingsuccessandincreasingleafcanopyinurbanareas,Greenleaftirelesslyanalysedthechallenges,thecausesoffailureandprematuremortalityenduredbytrees .Wethenexaminedthenegativeimpactpoorplantingcanhaveonurbaninfrastructures .Havingestablishedthekeyissuesforbothofthese,wethensystematicallyresearchedthereasonsforthoseissuesanddesignedpracticalproducts,solutionsandsystemsfortrees .
Thelasttwodecadeshaveseenrelentlessproductdevelopmentandadvancesintreesystemtechnologies .TheresultisseeninGreenleafsenviabletrackrecordofsuccessfulschemesandthedevelopmentofstateoftheartsustainabletreepitdesigns .Localauthorities,landscapearchitects,engineersandotherrelatedprofessionalsincreasinglyturntoGreenleafforguidanceandbestpracticeadviceintreeplantingimplementation .
AstheUKsmarketleaderinspecialisttreepitproducts,wearepleasedtobeinapositiontopresentyouwiththedefinitiveurbantreedesignmanualaresultof18yearsoffrontlineexperienceinthefield,exhaustiveresearch,productdevelopmentandfieldtrials .
Coupledwiththis,weofferyoutosampleoursupportserviceunrivalledinthetreeplantingworldletushelpyouachieveyourvision .
BasedinEastSussexbutwithofficesanddistributionpointsUKwide,Greenleafhasgrowneveryyearsinceitsinception .Ourprogrammeofcontinuousproductdevelopmentensuresthatspecifiersandclientscanrestassuredthatthesystemsweofferforurbanplantingschemesrepresentthebestinthesector .
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Design Guide Trees in the urban environment (Edition 7)
GreenleafGreenleaf
Sustainability
Ourcommitmenttosustainabilityisevidencedbytheconsistentuseofrecycledmaterialswhereverpossibleinourproducts .Greenleafscontributiontotreeplantingprojectsworldwideisvirtuallyincalculableandgivesusanenviablecarbonpositiveposition .Furthermore,localsourcingpoliciesmeanthat90%ofourspecialisttreeproductsaremanufacturedwithintheUK .
We are here to support you right from the outset of your scheme. Our service covers every stage, from initial feasibility studies through to planting.
Weliveintimeswhentheinternationaldebateonclimatechangehasmovedurbantreeplantingfurtherupthepoliticalagenda .LocalauthoritiesintheUKandotherlargecorporateorganisationsarebeingheldaccountableforclimatemitigationstrategiesthroughtheNI188reportingsystem .Treestrategiescanplayavitalroleinmeetingthesegoals .
Sustainability
1.03
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Design Guide Trees in the urban environment (Edition 7)
GreenleafGreenleaf
ForestvCity
1.05
ForestvCityConsider the contrast
Planting a tree in the urban environment involves a huge change for that tree in terms of the habitat that it will have to adapt to, compared with that which it would normally enjoy in rural conditions.
Treesareforestryplants .Assoonasweforgetthissimplefactwearelikelytomakemistakeswhenplantingthemintownandcityenvironments .
Thetreesshownoppositeareinabeautifulwoodedsettingandhavenearperfectconditions .Shelteredmicroclimate,richfertilesoilwithanabundanceofnutrientsandhumus,uncompactedleafmould,richrootingvolumewithplentyofmoistureandporespace .
Nowspareathoughtforthetreeinthetown .Aharshpavedsurroundincreasingmicroclimatetemperaturesandreflectedglare,exposuretowind,de-icingsaltandgratuitousvandalism .Belowgroundanequallyhostileenvironmentofcompactedsoils,lackofquality
rootablevolume,competitionforspacewithmultipleutilitiesandifthetreedoesmanagetospreaditsrootsystemsomeonewillmutilateit,throughtrenchingorpavementreinstatement .
Withthesefactorsinmind,wecanbegintheprocessofsuccessfullyintegratingtreesinbuiltupareas .Byprotectingthemaboveandbelowground,managingandprovidingfordelicaterootsystems,wecanasfaraspossiblerecreateoptimumconditionsforourtreestoestablish .
Wecannotrecreateentirelytheconditionstreesenjoyinwoodlandsbutwecangoahugedistanceinimprovingtheirchancesofthrivinginchallengingconditionsbytreeliteratedesign .
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Design Guide Trees in the urban environment (Edition 7)
GreenleafGreenleaf
HowtousethisdesignguideThismanualisdesignedtologicallyguideyouthroughtheprocessofsuccessfullyplantingurbantrees .Theformatwillassistyouwhetheryouareanexperiencedlandscapedesignerorsomeonefacinganewtaskchallenge .
How
tousethisdesignguide
1.07
n The benefits of urban treesn Trees and climate changen Identifying opportunities for urban tree planting n The process of successful tree pit designn Pitfalls and challenges
2.0 Product finder Includesimportantinformationsuchas:typicalinstallationspecification,productspecifications,compatibleproducts,productcodesandcrossreferencestoourtreepitdetails .n Arborsystemn Rootmanagementproductsn Treepitirrigationandaeration(ventilation)n Soilstructuresystemsn Guyingandtiesn Arborguyn Treetiesn Treegrillesandguardsn Treegrilleframesn Arboresinn ArborflowSUDStreepits
3.0 Projects Aselectionofcasehistoriesandprofilesthatcanhelpyouplanforyournextproject .
4.0 Tree Product packages Tosimplifythespecificationandinstallationofourrangeofproducts,weprovideGRtreepitdrawings .TheseshowhowproductsshouldbedrawninrelationtodifferentlocationscenariosandcanbesuppliedindifferentCADformats .Contractorscaneasilyorderutilisingasingleproductcode .
5.0 Information and support n Researchn Specificationsupportservicen ArborsystemCDinstructionsn NBSPlusn Arborsystemapprovedinstallersn Treesintheurbanenvironmentn Streetsandsquaressuitabletreespeciesn Maintenancen Frequentlyaskedquestionsn Environmentalpolicyn Howtoorder
6.0 Data Sheets Technicalinformationforourproducts
7.0 Index
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1.08
Thebenefitsofurbantrees
n Aestheticsfewthingscancomparewiththevisualimpactandseasonalinterestthatatreebrings.
n Forevery10%increaseinacitytreecanopy,ozoneisreducedbybetween3-7%.
n Healthtreeshaveapositiveimpactontheincidenceofskincancer,asthma,hypertensionandstressrelatedillnessbyfilteringoutpollutedair,reducingsmogformation,providingshadefromsolarradiationandgivinganattractive,calmingsettingforrecreation.
n OnestudybyNaturalEnglandcalculatedthatevery1spentontreeplanting,wouldyield7savings,whichiftakennationallywouldamounttoannualpotentialsavingsof2.1bn.
n Carbonreductiontreesareproventoabsorbcarbon.Havingremoveditfromtheairitisstoredascelluloseintheirtrunks,leavesandbranches(aprocess
knownassequestration).Plantingtreesremainsoneofthecheapest,mostcosteffectivemeansofdrawingexcessCO2fromtheatmosphere.
n Asinglematuretreecanabsorbcarbondioxideatarateof21.6kg/yearandreleaseenoughoxygenbackintotheatmospheretosupport2humanbeings.
n Stormwatermanagementandbufferingthecrownofalargetreeisafreestandinganti-floodreservoir.Onehundredmaturetreescaptureabout1,137,500litresofrainwaterperyear,allowingsometoevaporate,drawingupmorethroughtherootsandslowlyallowingtheresttosoakintotheground.
n Forevery5%oftreecoverinacommunity,stormwaterrunoffisreducedby2%.
n Biodiversitythebenefitsofprovidingnaturalhabitatsforbirds,squirrelsandotherfaunaareincalculable.
Sadly,formanyyearsnow,thetreecanopyinourtownsandcitieshasbeendiminishing .Largematuretreeswhichreachtheendoftheirlivesarefrequentlyfelledandreplacedwithsmallerspeciesornotatall .Replantedtreesstruggletoestablishduetothedemandsofengineeredsurfacesaroundthem .
However,astimehasgoneon,moreandmoreresearchhasconfirmedthevalueandbenefitofmaturetreesinurbanenvironments .CharitiesandorganisationssuchasTreesforCities,activelycampaigninsupportoftreesinurbanareas .
Here we summarise some of the principle benefits that local authorities, developers, urban planners, architects and specifiers need to be aware of:
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Design Guide Trees in the urban environment (Edition 7)
GreenleafGreenleaf
Thebenefitsofurbantrees
1.09
n Improvestheliveabilityofurbanareas.
n Treescanincreaserealestatevalues.Independentstudiesshowaconsistentincreaseinpropertyvaluesintreelinedstreetsbetween5-15%.
n Crimereductionresearchershavediscoveredreductionsinbothviolentandpettycrime,includingdomesticviolencethroughthetherapeutic,calminginfluenceofmaturetreeplanting.
n PollutantremovalSulphurDioxide,NitrogenOxidesandparticulates,CarbonMonoxide,Cadmium,NickelandLeadareallsubstancesthatatreewillworktoremoveandstore24/7365daysoftheyear.
n Researchhasshowna60%reductioninparticulatesfromexhaustfumesetcintreelinedstreets.
n Erosionreductionreducingtopsoilerosionthroughrunoffandpreventingharmfulchemicalsreachingwatercourses.
n Coolingeffectreducingtemperaturesbybothshadeandtranspiringwater.Thishelpsreduceairconditioningbillsandenergyuse.Onematuretreecanproducethesamecoolingeffectas10roomsizedairconditioners.
n Thissamecoolingeffectbecomesaneffectivetoolinreducingurbanheatislandsandhotspotsincities.
n Treescansaveupto10%oflocalenergyconsumptionthroughtheirmoderationoflocalclimate.
n Noisereductiontreesformaneffectivesoundabsorbingbarrier.
n Windspeedreductionbuildingsincreasewindspeedaswindisforcedtotravelfurtheraroundthem.Treessignificantlyreducewindspeeduptoadistanceof10timestheirheight.
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Design Guide Trees in the urban environment (Edition 7)
GreenleafGreenleaf
TreesandclimatechangeIf local authorities are to meet the stringent carbon reduction targets laid on them by 2020 and 2050, then trees need to be planted now! Furthermore these trees need to be planted in such a way that they stand a good chance of establishing well and reaching maturity.
How we can help.
n Byassistingyouinevaluatingtreepitdesigns
n Providingguidanceonbestpracticeintreepitlayoutandplantingmethods
n Givingyouqualityadvice
n Providingdetailedtreepitspecificationsandcosting
n Supplyingpractical,costeffectiveproducts,toassistwithtreeestablishment
n Sitesupportwhenplanting
n Supplyinglistsofsuitablyqualifiedcontractorstoexecutethework
n Contactwww.greenleaftrees.co.ukOrtelephone01424717797
Bysigninguptointernationalclimatereductiontargets,centralgovernmenthasissuedachallengetoeveryoneinvolvedinurbanspacedesign .Whilstwecannotrealisticallyclaimthatplantingtreesintownswillsignificantlyaffectglobalclimate,whatwedoknowisthattheyhaveamajorroletoplayincityclimate mitigation and adaptation strategies.
Treescan,byprovidingshadeandcoolingthroughtranspirationandevaporationprocesses,reducetemperaturesaroundthem .Clusters of well established trees probably represent the most effective tool available to urban designers in combating urban heat islands and heat sinks in cities. (Thesepocketsofheatbuildupinurbanareaswithsolarenergyandglarereflectingoffengineeredhardsurfaces .Thesesamesurfacesstoretheheatandreleaseitovernight,scarcelyhavingtimetocoolbeforethenextsunrise .)
Asmentionedearlier,onewellestablishedtreecanhavetheeffectof10roomsizedairconditionersbutofcoursefromatotallysustainable,zeroenergysource!
ThetargetssetforCO2reductionareextremelychallengingby2020,areductionof1 .2mtonnesofCO2perannumislookedforintheUK,andby2050areductiontargetof80%of2009levels .Iftreesaretoplayapartinimplementingthisreduction,alotneedstohappenquickly .
Treesandclimatechange
1.11
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1.12
IdentifyingopportunitiesforurbantreeplantingClearly, we cannot just simply drop trees in anywhere. To have a chance of success, tree species and location are the first priority in our goal of establishing trees in towns. Planting potentially large trees in wrong locations is counterproductive and will simply turn people against trees. However, equally often we see tree planting sites which could support larger species, populated with smaller whitebeam or prunus species which really represent a lost opportunity. Big trees bring big benefits but they must be located wisely.
Right tree, right placeTreesneedspace,theyneedsoilvolumethereisadirectcorrelationbetweenwhatweprovidethetreewithtogrowbelowgroundandwiththeresultwewillseeaboveground .
Architectsandengineerswouldneverseriouslyconsiderbuildingastructurewithinadequatefoundationsandyetmanywillroutinelyplanttreesontheirschemesintinytreepitsjustafractionofwhattheyreallyneedtodowell .
Wherepossible,planttreesingroupswithsharedsoilspace .Treescanthenspreadouthappilybetweenthemselvesandbenefitfromadditionalsoilvolume .Onecommonmethodistheuseofcontinuoustrenchplantingandthisisaverygoodwayofprovidingadequatevolume .
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Design Guide Trees in the urban environment (Edition 7)
GreenleafGreenleaf
Consider planting trees in the following locations:
n Buildoutsinroadschemesoneofthemostdemandingplacestoplantatreebutoneinwhichsuccessfulestablishedtreeshaveahugeimpact.Thesecanbeusedaspartoftrafficcalmingprojects(thusfulfillingtworolesinone),orsimplyparkingdelineation.
n Vergesthemostcommonareaforurbantreelocation.
n Pavementsdemandingonthetreebutcanbeachievedsuccessfullywithcarefulattentiontotreepitdesign.
n Carparksagainapotentiallyhostileplacetoplantatreebutgreatlybeneficialinprovidingcoolshadeforvehiclesinbrightweather.
n Plazasthesearewheretreescanreallyhavehugeaestheticandbeneficialimpactthereisnothingelsethatcanbeincorporatedinthesekindofspacesthatwillconferthesamedegreeofbenefit.
n ParklandFewthingscancompetewithestablishedtreesinaparksettingindeedtryimaginingaparkwithouttrees.
n Newforestpocketscreatingtreeclustersinurbanspacesandpocketparksisanexcellentstrategytoincreasetreecanopyforclimatemitigationandadaptation.
n SUDSConsidertheuseoftreesaspartofastormwaterretentionstrategysudstreepitdesignsarenowworkable.
Identifyingopportunitiesforurbantreeplanting
1.13
Largecarparkswithouttrees:urbanhotspotsandmissedopportunities Successfultreeplanting,withnoreductioninparkingspace
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1.14
Theprocessofsuccessfultreepitdesign
n AvailablerootspaceSoilvolumerequirementsfortreescanbeestimatedusingseveralmethods.Asstatedearlier,inanaturalenvironmentarootsystemcanextendtwotothreetimestheradiusofthetreecanopy.Probablythesimplestwayofcalculatingaminimumrequiredsoilvolumeistotakethe
projectedcanopyareaofthematuretree,multipliedbyadepthof0.6m.Theshapeofthisareacanbeconfiguredtosuittheparticularsite.Othermethodsarebasedonmaturetrunkgirthandarepossiblymoreaccurateastheyprovidefordifferentfoliageshapes.Theoldmethodofprovidinganareathesizeofthepavementopeningisclearlyinsufficient,andcommitsthetreetoanuntimelydeath,oralifetimeofcostlyrepairs.
n EngineeringrequirementsWithmanytreesbeingplantedimmediatelyadjacenttohighwaysandengineeredstructures,itisvitalthatrootvolumebeneathoraroundsuchisconsidered.Engineeringrequirementsforhardsurfacesaredirectlyopposedtohorticulturalrequirements.Structuralsoilmodulesorsimilarmustbeconsideredearlyenoughinaprojecttobeincorporatedduringthecivilsorgroundworkstage.
Havingmadeadecisiononspeciesandlocation,thefollowingprocessshouldbeobservedwhendesigningtheexactprofileofthetreepitandancillaries:
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Design Guide Trees in the urban environment (Edition 7)
GreenleafGreenleaf
n Rootmanagementpavedsurroundsorutilitiesnearby?Ifso,rootmanagementshouldbespecifieddependingonwhatneedsprotectingandwhereitisinrelationtothetree.Forcontinuouspavedsurroundforexample,rootswillneedmanagingdownwardsbyatleast300mmtodesignoutpavingheave.Seeoursectiononrootmanagementforfurtherdetails.
n IrrigationlackofwaterandnutrientsarethebiggestsinglekillersofnewlyplantedtreesintheUK.Itisveryimportanttoincorporatethemeanstoirrigateefficiently,particularlyforthefirstthreeyears.
n Drainagewaterloggedtreepitscanbecomeanaerobicandthiswillkillthetreepleaseensurethatpotentialdrainageissueshavebeenaddressedearlyoninyourscheme.
n Aerationlesswidelyknownbutnonethelessimportant,soilsandrootsneedairtolive.Iftherootplateofthetreeiscoveredwithimperviouspaving,vitalgaseousexchangeintherootzonecannottakeplace.Appropriatetreepitdesignshouldincludeameansoffacilitatingairsupplybelowground.
n Supporthowwillyouensurethetreeissecurelylocated?Undergroundguyingiswidelyfavouredforurbanareasasitisunobtrusive.Stakingandtyingisanalternativebutthiswillrequiremaintenance.
n AbovegroundWhatsortofenvironmentwillyoubeplantingininsomelocationsabovegroundprotectionfromcarelessnessand/orgratuitousvandalismbecomescriticaltotreesurvival.Adecisionwillneedtobemadeonwhetherthereisaneedfortreegrilles,verticalguardsandotherprotectivemeasures.
Theprocessofsuccessfultreepitdesign
1.15
Havingconsideredandprovidedforalltheaboveitems,wearewellonthewaytoensuringthatourtreeplantingprogrammeisgoingtobeefficientandsuccessful .Theabovefactorscoverwellover90%ofthereasonsforurbantreefailure .Wenowneedtolookatthespecificproductsrequiredtohelpusdesignthesefeaturesintoourschemes .
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1.16
PitfallsandchallengesEach of these photographs tell a story. Learning from both our own and others mistakes is imperative if we are to pursue the goal of increasing urban tree canopy cover.
Thisguardiskillingtheveryarticleitwassupposedtoprotect
Inappropriateproductselectioncanblighttheresult
Ahealthytree:Withtherightproductselectionurbantreescanthrive
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Design Guide Trees in the urban environment (Edition 7)
GreenleafGreenleaf
Pitfallsandchallenges
1.17
Insufficientrootingvolumeafteragoodstartthesetreesexhaustedavailablesoil
Makeshiftanduntidyahomeforratsandmice
Ahealthytree:Withtherightproductselectionurbantreescanthrive
Ahealthytree:Withtherightproductselectionurbantreescanthrive
Surfacerootheave
Poorplantingtechniquesharmtrees
Poordrainagecankill
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I can improve the environment
Research has shown a 60% reduction in particulates from exhaust fumes in tree lined streets
2 l P
roducts
Find
ingsuccess
GreenleafGreenleaf
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Design Guide Trees in the urban environment (Edition 7)
GreenleafGreenleaf
2 l Products Finding success
Arborsystemn The definitive urban tree pit package . . . . . . . 2.01
Root managementn Root management products, overview . . . . . . 2.02
n Root management selector chart . . . . . . . . . . 2.03
n ReRoot 300Linear pavement protection . . . . . . . . . . . . . . 2.04
n ReRoot 600/1000Linear pavement protection . . . . . . . . . . . . . . 2.06
n ReRoot 2000Deep application root barrier . . . . . . . . . . . . . 2.08
n Root Director Modular root protection system . . . . . . . . . . . 2.10
Tree pit irrigationn Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.13
n Rootrain Metro Irrigation . . . . . . . . . . . . . . 2.14
n RootRain Urban Irrigation and aeration . . . 2.16
n Rootrain Civic Large capacity irrigation . . . 2.18
n RootRain Precinct & Arborvent For heavily trafficked areas . . . . . . . . . . . . . . . 2.20
Structural soils and soil modulesn What is soil structure . . . . . . . . . . . . . . . . . . . 2.23
n Soil structure systems . . . . . . . . . . . . . . . . . . 2.24
n RootCell Soil structure system . . . . . . . . . . 2.26
n StrataCell Soil structure system . . . . . . . . . 2.28
n Arborsoil Compactible root zone material . . 2.30
Guying and tiesn Support and protection . . . . . . . . . . . . . . . . . 2.33
n Arborguy Underground guying . . . . . . . . . . 2.34
n Tree ties: Securing large root balled trees . . . . 2.36
n Arbortie 600mm soft tree tie. . . . . . . . . . . . 2.37
n Naturetie Biodegradable tree tie . . . . . . . . . 2.38
n Tree Guard Tie for use with tree guard . . . . 2.39
Tree grilles and guardsn Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.41
n Fully integrated grille systems . . . . . . . . . . . . . 2.42
n Standard tree grille range: Adur, Avon, Clyde, Dart, Tay and Yare . . . . 2.44
n Design line tree grille range: Boulevard Ductile iron grilleCastle Heavy duty recessed grilleMedway Light grille for use for 600mm pavingArborAdvance Non-slip ventilated grille Bespoke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.46
n Vertical tree guards: Ullswater, Coniston, Derwent, Ennerdale, Thirlmere, Windermere, bespoke and weldedmesh guards . . . . . . . . . . . . . . . . 2.48
n Tree grille frames:Fully integrated grille systems . . . . . . . . . . . . . 2.50
n Arboresin Porous tree pit surface . . . . . . . . 2.52
n Precast Arboresin Porous tree pit surface . . . . . . . . . . . . . . . . . . 2.54
Sustainable urban drainage systemsn Arborflow trees and sustainable
urban drainage systems . . . . . . . . . . . . . . . . . 2.57
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Sales and service: 01424 717797Technical assistance: 01424 433233Sales Fax line: 01424 533003Email: [email protected]: greenleaftrees.co.uk
Design Guide Trees in the urban environment (Edition 7)
GreenleafGreenleaf
ArborsystemThe definitive urban tree pit package
TheGreenleafArborsystembringstogetherthekeyelementsofsuccessfultreepitdesignandsimplifiesthedesignandinstallationprocessforspecifiersandinstallers .
ByusingourCADdiscorhardcopies,landscapeprofessionalscancombinerootmanagement,structuralsoilcomponents,aeration,irrigationandchooseanappropriateabovegroundsurfacegrilleandverticalguardinasinglepackage .
Sinceitsinceptionanddevelopmentoverrecentyears,theArborsystemintegratedtreepitproductpackagehasproveditselfinmanydemandinglocations .Formanylandscapespecifiers,Arborsystemhasbecomethesystemofchoiceforintegratingtreesintotheurbanenvironment .
By utilizing Arborsystem, landscape designers can:
n Ensureproductcompatibility
n Drasticallyreducetimespentonspecifying,quotingandordering
n Adaptasystemtosuitdifferinglocationandbudgetconstraints
n Demonstratetoclientsaprofessionallongtermapproachtotreeplanningandmanagementissues
n Benefitfromouronsitesupportserviceforpeaceofmind
Arborsystem
2.01
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2.02
RootmanagementproductsOverview
Withtodaysclientsrequiringcompletelifecostinganddutyofcareobligations,itisnolongersufficienttoplantatreeinanurbanlocation,simplyhopingthattherootswillkeepoutoftrouble .Thisguidesetsoutcurrentbestpracticeintreerootmanagement .
Greenleafhasdevelopedarangeofspecialistrootmanagementproducts .Differentsituationsoftenrequireadifferentapproach .
Ratherthantakeaonesizefitsallattitudewehavedesignedourrootmanagementrangetogivethetreeasmuchgrowingadvantageaspossible .
Therefore,ifoneissimplywantingtoprotectpavedsurfacesfromrootheave,itisunnecessarilyrestrictiveonthetreetoinstallaverticalsheetbarrier1 .5mdeepallround .TheRoot Director productdivertsrootsdownwardstoalevelwheretheycansafelyestablishwithoutsurfacedamage .
So,whetherdesigningarootfreecorridorforutilities,protectingbuildingfoundationsordesigningtreesintoapedestrianisedarea,Greenleafhasacosteffectiverootmanagementsolution .
Fortechnicaladviceontheproductapplicationphone01424 433233.
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Design Guide Trees in the urban environment (Edition 7)
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Rootm
anagementproducts
2.03
Root management selector chartItisintendedthatthediagrambelowwillbeofassistanceindeterminingwhichproductshouldbeusedinmostsituations.
Itisaguideonlyandshouldbereadinconjunctionwithourmaincatalogue.Ifnecessaryphoneourtechnicallineforhelpon01424433233.
Suitableproduct
Suitableproducts
Suitableproduct
Suitableproducts
Suitableproducts
Suitableproducts
What are you needing to protect from roots?
Suitableproduct
ReRoot 2000 RD640Root Director
RD1050Root Director
RD1400Root Director
ReRoot 600
ReRoot 1000
ReRoot 300
ReRoot 600
ReRoot 1000
ReRoot 600 ReRoot 1000
ReRoot 20001m deep+
ReRoot 2000Available in
1m,1.5m & 2m stock depths,deeper barriersto special order
Up to550mm
Suitableproduct
RD510Root Director
Up to400mm
Up to1250mm
What is the predicted girth (circumference)of the mature trunk?
How deep are yourservices/utilities?
Up to450mm
Up to800mm
Deeperthan
800mm
LinearSurround
Surroundor Linear
Depth of servicesdetermines barrier type
Pavements & undergroundservices/utilities
Undergroundservices/utilities
PavementsBuildingfoundations
High densityroot barrier
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2.04
ReRoot300Linear pavement protection
Benefits
n Deeperrootsystemmeansgreaterdroughttoleranceandimprovedtreestability
n Deeperrootsystemisnotvulnerabletode-icingsalts,usedextensivelyonfootpathsandcyclepaths
n Protectionofpedestriankerbsfromrootheave
n Retrofittingaroundrecentlyplantedtrees
n Protectstreewhenpavementre-instatementworksarecarriedout
n Suppliedinrollformtoany10lin.mincrement
ReRoot 300linearribbedrootbarrierhasbeendesignedforapplicationswhereitisnotnecessarytodeflecttreerootsystemstoodeeply .Thishighdensityrootbarrierissuppliedin300mmdeeprolls .Thebarrierwilldeflectthegrowingrootsdownwardsufficientlytoprotectastandardpedestriankerblinefromsurfacerooting .
ReRoot 300, 600 & 1000areprotectedbypatent(Patentno .2311309)astheonlyrollformrootbarrierwithintegralrootdeflectingribs .
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IllustratedistheReRoot 300productbeingusedinconjunctionwithRootCells .Thebarrierdivertsshallowlateralrootgrowthintothepreferredrootingzone
ReR
oot300
2.05
Typical Installation specification
InstallReRoot300ribbedrootbarriertoprotectallhardsurfacesfromtreerootdamage.Rootbarriershouldbeinstalledwiththeribsfacingthetree.Thetopedgeoftherootbarriershouldfinish10mmaboveanygrowingmediatreeside.Tojoinrollends,overlapby500mmandtapebothsideswithGreenleafrootbarrierjointingtape.
Compatible Arborsystem products
n Treepitirrigation.See2.13
n Soilstructuresystems.See2.23
n Rootballguyingandties.See2.33
n Treegrillesandguards.See2.41
Standard tree pit details
Toclearlyillustratecorrectproductapplication,pleaserefertoourstandardtreepitdetailswhichareinthetreeproductpackagessection.
Product specification and codes
Product Thickness Code
ReRoot 300 1 .0mm RER300A
ReRootJoint Tape(10mroll) - RERJTA
ReRoot 300 wasusedtoprotectpavedsurfacesanddirectrootsonthisprojectinSwindon
ReRoot 300canbeusedtoprotectcyclepathsthroughruralareasfromtreerootdamage
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2.06
ReRoot600/1000Linear pavement protection
Benefits
n Easytoinstall,nospecialistequipmentneeded
n Availablein600mmand1000mmdepth
n Suppliedinrollformtoany10lin.mincrement
n Ribbedconstructionpreventsrootswirlanddirectsrootsdownwardandoutward
n Flexibledesignallowsthebarriertocurvearoundobstaclesbutisrigidenoughtoholditsformwhenbacklling
n ReRootjointingtapewillensurerootproofjointswhenjoiningrollends
ReRoot 600andReRoot 1000productsareribbedrootbarriersdesignedfortheprotectionofpavedsurfaces,shallowserviceductsandutilities .
Availableinrollformandintwodifferentdepths .Thenumbers600and1000denotethedepthinmm .
Thisversatilerootmanagementsystemcanbeusedtosurroundindividualorgroupsoftreesbecausetheribsareproventodivertlateralrootgrowthdownwards .
Typical installation specification
InstallReRoot600linearrootbarrierwithintegralrootdeectinggroundlockribsasfollows:Excavatenarrowtrenchtoadepthof600mm.Ensurethatthebaseofthetrenchisrmandlevel.Removeanysharp
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Design Guide Trees in the urban environment (Edition 7)
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Typicalproject,threeyearsafterplanting
ReR
oot600/1000
2.07
Compatible Arborsystem products
n Treepitirrigation.See2.13
n Soilstructuresystems.See2.23
n Rootballguyingandties.See2.33
n Treegrillesandguards.See2.41
Standard tree pit details
Toclearlyillustratecorrectproductapplication,pleaserefertoourstandardtreepitdetailswhichareinthetreeproductpackagessection.
Product specification and codes
Product Thickness Code
ReRoot 600 1 .0mm RER600A
ReRoot 1000 1 .0mm RER1000A
ReRoot Joint Tape (10mroll) - RERJTA
ReRootcanbeusedtocontrolrootdevelopmentwithbothindividualandgroupsoftrees .Liningthepavementasshownmaximisesrootingvolumeforthetrees
Investmentatplantingstagewillpreventcostlyrootdamagetopavements
ReRoot 1000installedtoprotectundergroundservicesanddivertrootsbeneathpavementsurfaces
Manylocalauthoritiesnowstateintheirplanningpolicythattreesplantedinsoftareaswithin3mofapaved/hardsurface,thatwillbeadoptedbythecouncil,mustbelinedwitharootbarrier .Thisprotectsthepavementinthelongtermandthetreesrootsystemintheeventofpavementexcavation .
objectsfromcloseproximitytothetrenchwalls.Installrootbarrierwiththeribsfacingthetreeroots.
Backllthetreesidewithgoodqualitytopsoilandtherearsideofthebarriersimultaneouslywithsubsoilallowingforsurfacenishingkerbingetc.
Backllingshouldbeinlayers.Concreteispermissibleontherearsideofthebarrierifrequiredtosupporthardlandscapesurface.Careshouldbetakentoremoveanysharpobjectsfromthebackllmaterial.Thetopedgeoftherootbarriermustremain10mmabovethesurfacetreeside.TojoinrollendstapebothsideswithGreenleafReRootjointingtape.
ForReRoot1000,onlytheexcavationdepthdiffersfromtheabove.
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2.08
ReRoot2000Deep application root barrier
Benefits
n Resistanttopuncturebysharpobjectsortearingasaresultofsoilmovement
n Durable,resistanttobiodegradationandphotodegradation
n Easytoinstall,nospecialistequipmentneeded
n Availableinstandard0.3m,0.6m,1.0m,1.5mand2.0mdepthrolls,upto6metredeeprollstospecialorder
n Suppliedinrollformtoany10lin.mincrement
n Availablein1.0mm(productcodeRER210),and2.0mmthickness(productcodeRER220)
n EffectiveinthecontrolofJapaneseKnotweedandotherinvasiveplants
n ReRoot2000fulfilsalltheArboriculturalAdvisoryandInformationServiceguidelinesforrootbarriers
n Manufacturedfrom100%recycledmaterial
ReRoot 2000wasspecifiedandinstalledatthisindustrialparkatSpeke,Liverpool .NotehowtreeshavebeenplantedparalleltoamajorgasmainwiththeapprovalofTransco .
ReRoot 2000 isahighstrengthrootbarrierfordeeperapplications .ThisproducthasbeenusedextensivelyonmanyprojectsaroundtheUK,particularlyinnewserviceinfrastructureprojects,businessparksandhousingdevelopments .
ReRoot 2000isrigidenoughtoholditsformwhenplacedintoatrench .Thisisabigadvantageasitwillnotbedraggeddownwardduringbackfilling .Marketleadingpunctureresistanceandstrength,meanthatthisistherootbarrierofchoiceforspecifiersandutilitycompaniesrequiringrootfreeservicecorridors .
ThehighpunctureresistanceofReRoot 2000allowseasiercompactionclosetothebarrierensuringanexcellentproduct/soilinterface .
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Design Guide Trees in the urban environment (Edition 7)
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ReR
oot2000
2.09
Typical installation specification
InstallReRoot2000(includingrelevantproductcode)linearrootbarrierasfollows:
Excavatenarrowtrenchbetweenthetreeandthestructuretobeprotected.Pleasenote:thepositioningofthetrenchwilldependontreespeciesandothersiteconditions.Pleaseconsultaqualifiedarboriculturist.
Thebarriershouldbepositionedinthetrenchagainstthesideofthetrenchnearestthetree.Anysharpobjectsshouldberemovedfromthetrenchwallsandthebackfillmaterial.
ReRoot2000rollendscanbejoinedbyoverlappingatleast500mmandsecuringbothsideswithGreenleafrootbarrierjointingtape.Forcriticalapplicationsthematerialcanbeseamwelded.
Ensurethatthetopofthebarrierfinishesatleast10mmabovefinishedsoillevelstreeside,toavoidsubsequentrootovergrowth.Thebarriercanbetrimmedusingasharpknife.Backfillthetrenchinlayers,compactingcarefully.
Itmaybedesirable,dependingonsiteconditions,toencapsulatethetopedgeofthebarrierinconcretehaunchingtoprotectthebarrierandtofinishtheinstallationtidily.
Product specification and codes
Product Thickness Depth Code
ReRoot 2000 1 .0mm 300mm RER210X0 .3A
ReRoot 2000 1 .0mm 600mm RER210X0 .6A
ReRoot 2000 1 .0mm 1000mm RER210X1 .0A
ReRoot 2000 1 .0mm 1500mm RER210X1 .5A
ReRoot 2000 2 .0mm 1000mm RER220X1 .0A
ReRoot 2000 2 .0mm 1500mm RER220X1 .5A
ReRoot 2000 2 .0mm 2000mm RER220X2 .0A
ReRoot joint tape(10mroll) - - RERJTA
ReRoot 2000canbeusedtokeeptreerootsfromdamagingservicesandpavedareas
ReRoot 2000installedtoprotecthardsurfacesatGranton,Edinburgh
ReRoot 2000hasbeeninstalledpriortotopsoilinginthisinfrastructureproject
ReRoot 2000willholditsforminatrenchexcavation .Thismakesinstallationquickandeasy .Alsovisibleislanddraintoremovegroundwaterpressure
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2.10
RootDirectorPreformed root protection system
Benefits
n Protectionforpavedsurrounds
n Encouragesdeeprootgrowth
n Improveddroughttolerance
n Greatlyenhancedtreestability
n Integralribbedconstructionwhichpreventsrootswirl
n Optionalirrigationfacility
n CompatiblewithGreenleafArborsystemproducts
n Simpletoinstall
n 100%recycledplastic
Designedfortheprotectionofpavementsandhardlandscapedareas,theribbedRoot Director systempreventsrootswirlanddivertsrootgrowthdownwardandoutwardthusavoidingtheunsightlyandhazardousrootdamagesocommonlyseeninurbanareas .
TheRoot Directorsrigid,one-piececonstructionmakesinstallationsimple .AsaproductwithintheArborsystemrange,itiscompatible
withtheRootRainirrigationsystem,RootCell loadbearingsoilstructureandourextensivetreegrilleandguardrange .
Root Directorsareofrobustconstructionandcanbeeasilyhandledonsite .
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Design Guide Trees in the urban environment (Edition 7)
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D
clear opening
A
C
B
Compatible Arborsystem products
n Treepitirrigation.See2.13
n Soilstructuresystems.See2.23
n Rootballguying.See2.33
n Treegrillesandguards.See2.41
Root Directorsaretheidealrootmanagementsolutionforindividualtreeplantingschemes,andwereusedinboththeaboveprojects .
Standard tree pit details
Toclearlyillustratecorrectproductapplication,pleaserefertoourstandardtreepitdetailswhichareinthetreeproductpackagessection.
Root DirectorRD1400Aduringinstallation
Product specification and codes
Product A B C D Code
Root Director 510mm 595mm 310mm 425mm RD510A
Root Director 630mm 885mm 455mm 575mm RD640A
Root Director 975mm 1370mm 545mm 860mm RD1050A
Root Director 1300mm 1805mm 500mm 1200mm RD1400A
RootD
irector
2.11
Typical installation specification
InstallRootDirectorpreformedrootbarriersystemwithintegralrootdeflectingribs.
ExcavateplantingpittoacceptRootDirector.Ensureadequatedrainagetopit.IfusinginconjunctionwithRootCells,theseshouldbeinstalledfirst.ThelowerflangeoftheRootDirectorshouldbelevelandonafirmevenbasetoavoidsettlement.EnsuretopedgeofRootDirectorislevelwithfinishedsurroundunlessinstallingwithatreegrille.Ifatreegrilleisbeingused,checkdepthofsupportframe.
Backfillinsideandoutsidesimultaneously,firmingin150mmlayers.TopsoilinsidetheRootDirectorshouldnotoverflowthetopflange.
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Design Guide Trees in the urban environment (Edition 7)
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Tree pit irrigation
2.13
Tree pit irrigationOverview
By far the biggest contributor to the high mortality rates suffered by urban trees is drought stress. Water is vital for the growth of trees. It is not only required for all the biochemical requirements for growth photosynthesis, respiration and transport, but also mechanical support to leaf and stem tissue.
Insufficient (or inefficient) watering will result in loss of leaf turgor and consequent reduction in new shoot extension. Eventually this will lead to die-back and, if not remedied, the loss of the tree.
Waiting until the tree shows signs of drought stress before watering is known as reactive irrigation. Whilst this might keep the tree alive, it will often result in stem die-back and possibly long term structural defects in the tree.
Research has shown that trees irrigated proactively i.e. by implementing a regular watering regime, have over three times the weight of new roots growing into backfill soil material compared to those watered reactively.
The principles of tree root watering
Tree watering requirements
RootRain waterers deliver water directly to the root zone. This eliminates wastage and reduces the risk of surface compaction
The roots are encouraged to establish at a greater depth improving long term drought resistance and tree stability. Provides an access point for air and feeding with soluble fertilisers
Girth (cm)
Height (m)
Estimated daily* transpiration rate (litres)
Suggested first season summer
watering requirements (litres per month)
Feathered 6 1.8 - 3.0 1 36
Light Standard 6 - 8 2.4 - 2.7 1 36
Standard 8 - 10 2.7 - 3.0 1.2 45
Selected Standard 10 - 12 3.0 - 3.6 2.0 75
Heavy standard12 - 14 3.6 - 4.2 3.0 115
14 - 16 4.2 - 4.8 4.0 150
Extra Heavy16 - 18 4.8 - 5.4 5.0 190
18 - 20 5.4 - 6.0 6.0 220
Semi Mature 20+ 6.0+ 7.0+ 300+
Surface irrigation is rarely efficient for trees, the topsoil layer waterlogs, leading to surface run off, soil capping, compaction and wastage. Water has difficulty penetrating the deeper root zone
If surface is irrigated regularly to a shallow depth, roots will remain near the surface leading to a long term susceptibility to drought
*Calculations for transpiration and suggested watering requirement are based on a typical plane tree in a tree pit ameliorated with 25% peat and with a 50mm mulch layer. The figures are approximate and are for guidance only. Allow an extra day for every 10mm of rainfall
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2.14
RootRainMetroIrrigation system
Benefits
n Quickandeasytoinstall
n Extremelycosteffective
n Improveddroughttolerance
n Fastwatering(60litresperminuteinporoussoil)
n Reduceswatervolumerequirementsbyeliminatingwastage
RootRainwithplasticcap .
Plasticcapwithchain .
Metalcapwithchain .
Typical installation specification
InstallRootRainMetro(stateproductcode)c/wpipeandfixingbracketwithattachedtopcapasfollows:
Loopthefreeendofthe35mmperforatedirrigationpipearoundtherootsystemapproximately250mmbelowfinishedlevel.
RootRain Metrothemostwidelyspecifiedtreewaterer .
TheoriginalRootRain MetrosystemisthemostwidelyspecifiedproprietarytreepitirrigationsystemintheUK .DesignedandmanufacturedinBritain,theMetroisavailableinthreedifferentsizesandwiththreedifferentcapconfigurations .
Thesystemisalsoavailableincontractorpackformforselfassembly .
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RootR
ainMetro
2.15
Effective Discreet Unobtrusive
Compatible Arborsystem products
n Rootmanagement.See2.02
Standard tree pit details
Toclearlyillustratecorrectproductapplication,pleaserefertoourstandardtreepitdetailswhichareintheinstallation,treeproductpackagessectionref:GR1001-GR1003,GR1008andGR1009.Product specification and
codes
Product Pipediameter Length Application Captype Code
RootRain Metro 35mm 1 .25m Specimenshrubs/standardtrees Plastic RR1A
RootRain Metro 35mm 1 .25m Specimenshrubs/standardtrees Plasticwithchain RRPC1A
RootRain Metro 35mm 1 .25m Specimenshrubs/standardtrees Metalwithchain RRMC1A
RootRain Metro 35mm 1 .75m Standardtrees/selectedstandardsto8-10cmgirth Plastic RR2A
RootRain Metro 35mm 1 .75m Standardtrees/selectedstandardsto8-10cmgirth Plasticwithchain RRPC2A
RootRain Metro 35mm 1 .75m Standardtrees/selectedstandardsto8-10cmgirth Metalwithchain RRMC2A
RootRain Metro 35mm 2 .5m Selectedstandards/heavystandards Plastic RR3A
RootRain Metro 35mm 2 .5m Selectedstandards/heavystandards Plasticwithchain RRPC3A
RootRain Metro 35mm 2 .5m Selectedstandards/heavystandards Metalwithchain RRMC3A
Simplylooparoundtheshoulderoftherootball . NailthebrackettothetreestakebeforebackfillingtoconcealtheMetrobracket .
Plugthepipeintothebracketbottomcap.Nailthebrackettothetreestaketopreventtheft.Backfilltherestofthetreepit.Itisimportanttoensurethattheinletpipeandtopcapprotrudebetween10mmand50mmfromthefinishedsurroundlevel.Themainbracketsectionshouldnotbevisible.
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2.16
RootRainUrbanIrrigation and aeration system
Benefits
n Largecapacity80mminletwith60mmwateringcircuit.
n Easyandquickinstallation.
n Costeffectiveonthelargestorsmallestschemes.
n Extremelyvandalresistant.
n Discreetandunobtrusiveappearance.
Typical installation specification
InstallRootRainUrban(1,2or3)irrigationsystemasfollows:
Loopthe60mmirrigationpipearoundtheshoulderoftherootball(200mm-300mmbelowgroundlevel)andconnectsecurelytotheteepiece.Theverticalpieceofpipecanbecuttolengthtoensurethattheinletisflushorslightly(25mmmaximum)proudofthefinalpitsurround.
Alargecapacityirrigationsystemwithafixednon-removablegridinlet .Thegridallowswaterandairthroughbutpreventsingressoflitteranddebris .
TheRootRain Urbanisparticularlysuitedtoroadsidevergeandopenspacetreeplanting .Theinletsarestrimmerresistantandcanbesetbelowmowingmachineheight .Theyhaveverylittlevandalappealandnotheftvalue,makingthemidealforhousingestatesandpublicareas .
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Design Guide Trees in the urban environment (Edition 7)
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D
Product specification
n Inlet:80mmheavydutyHDPEmouldedgridtop
n Reducer:80/60mmHDPEwithintegralstrengtheningfins
n Verticalpipe:60mmPEperforatedpipe
n Teesection:HeavydutyHDPEwithnonreturnlockinglugstosecurepipework
Compatible Arborsystem products
n Rootmanagement.See2.02
n Rootballguying.See2.33
Product specification and order codes
Product DiameterD Pipelength Code
RootRain Urban 895mm 3m RRURB1A
RootRain Urban 1530mm 5m RRURB2A
RootRain Urban 2490mm 8m RRURB3A
Standard tree pit details
Toclearlyillustratecorrectproductapplication,pleaserefertoourstandardtreepitdetailswhichareinthetreeproductpackagessection,ref:GR1004-GR1007.
Usingthetablebelow,thespecifiercanselectthecorrectsizeinrelationtorootballdiameter .
ThisillustratesthecorrectlevelfortheRootRainUrbaninlet .Toolowcouldleadtoblockages;toohighcanlookobtrusive .
RootRainUrbanthecosteffectivehighcapacitytreewatererdesignedfordurability .
RootR
ainUrban
2.17
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2.18
RootRainCivicLarge capacity irrigation system
Benefits
n Largecapacity80mminletwith60mmwateringcircuit
n Ventedaluminiumcaponretainerchain
n Preventsfinesenteringirrigationsystem
n Quickandeasytoinstall
Typical installation Specification
InstallRootRainCivic(1,2or3)irrigationsystem,completewithaluminiumcapandretainerchain.
Loopthe60mmirrigationpipearoundtheshoulderoftherootball(200mm-300mmbelowgroundlevel)andconnectsecurelytotheteepiece.Theverticalpieceofpipecanbecuttolengthtoensurethattheinletisflushorslightly(25mmmaximum)proudofthefinalpitsurround. Wheninstalledcorrectly,onlythealuminiumcapshouldbevisible
TheRootRain Civicsystemisaverywellprovenlargecapacityirrigationsystemwhichhasavandalresistantinletwithapowdercoatedaluminiumcaponaretainerchain .Popularwithlandscapearchitectsandcontractors,theCivichasbeenwidelyusedonprojectsdemandingahighlevelofspecification .
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Design Guide Trees in the urban environment (Edition 7)
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Product specification
n Inlet:80mmheavydutyHDPEmouldedgridtop
n Inletcap:Aluminiumpowdercoatedwithretainerchain,finishedinblack
n Reducer:80/60mmHDPEwithintegralstrengtheningfins
n Verticalpipe:60mmPEperforatedpipe
n Teesection:HeavydutyHDPEwithnonreturnlockinglugstosecurepipework
n Pipecircuit:60mmPEperforatedpipe
Compatiable Arborsystem Products
n Rootmanagement.See2.02
n Rootballguying.See2.33
Product specification and codes
Product DiameterD Pipelength Code
RootRain Civic 895mm 3m RRCIVIC1A
RootRain Civic 1530mm 5m RRCIVIC2A
RootRain Civic 2490mm 8m RRCIVIC3A
Usingthetablebelowthespecifiercanselectthecorrectsizeinrelationtorootballdiameter Capisventilated
toallowsomeairexchangetothetreepit .Idealforuseinbarkmulchareas
TypicallocationsforRootRainCivicinstallation
Wheninstalledcorrectly,onlythealuminiumcapshouldbevisible
D
RootR
ainCivic
2.19
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2.20
RootRainPrecinct&ArborventFor heavily trafficked areas
Typical Installation Specification
InstallRootRainPrecinct(1,2or3)irrigationsystemc/wcastaluminiuminletasfollows:Loopthe60mmirrigationpipearoundtheshoulderoftherootball(200mm-300mmbelowgroundlevel)andconnectsecurelytotheteepiece.The
The RootRain Precinctisforcentralurbanlocationsrequiringapermanentirrigation/aerationsolution .
TheRootRain PrecincthasbeenspeciallydesignedtointerlockwithourArborsystemrangeoftreegrilles .Thisprovidesatamperresistantsystemwhichwillalsopreventtheinletsinkingsubgradewithanypotentialsoilsettlementaroundthetree .
Benefits
n HeavycastLM6gradealuminiuminletwithstandshighloads
n Stainlesssteelventlidpermanentlyattachedtoinletbystainlesssteelfitting
n Lidliftsandswingstoonesideforfastirrigation
n InlettwistlocksintoGreenleafsrangeoftreegrilles
n CanbeusedinconjunctionwithArboresinporousboundgravel
n Flushfinishensuresnotriphazard
TheArborventisfrequentlyusedtoprovideseveralirrigation/aerationpointsaroundindividuallargetreesinconjunctionwiththeRootCellsystem .
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Design Guide Trees in the urban environment (Edition 7)
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Product specification
n Inlet:120mmdiametertosuittreegrilles.Heavycastaluminium/bronzeinletwithliftandswivelventlid.Arborvent100mmx100mmtosuit100mmpavers
n Verticalpipe:60mmPEperforatedpipe
n Teesection:HeavydutyHDPEwithnonreturnlockinglugstosecurepipework
n Pipecircuit:60mmPEperforatedpipe
Standard tree pit details
Toclearlyillustratecorrectproductapplication,pleaserefertoourstandardtreepitdetailswhichareinthetreeproductpackagessectionrefs:GR1010-GR1023.
verticalpieceofpipecanbecuttolengthtoensurethattheinletisflushwiththepavingsurround.Iffittingintoatreegrille,ensureinletisconnectedtovertical60mmriserpipe,locateinletintopurposeformedaperturewithinthegrilleandtwisttolockintoplace.
Product specification and codes
Product DiameterD Pipelength Code
Arborvent 895mm 3m RRARBV1C
Arborvent 1530mm 5m RRARBV2C
Arborvent 2490mm 8m RRARBV3C
Arborvent double inlet 2490mm 8m RRARBVDI3C
D
Usingthetablesabove/below,thespecifiercanselectthecorrectsizeinrelationtorootballdiameter
RootRainPrecinctinletsetinpavedsurround
Arborventinlet
Product specification and codes
Product DiameterD Pipelength Code
RootRain Precinct 895mm 3m RRPREC1C
RootRain Precinct 1530mm 5m RRPREC2C
RootRain Precinct 2490mm 8m RRPREC3C
GrilletypeInletwhichinterlockswithourArborsystemrangeoftreegrilles .
Inletopensforirrigation .
RootR
ainPrecinct&
Arborvent
2.21
Compatible Arborsystem products
n Rootmanagement.See2.02
n Soilstructuresystems.See2.23
n Undergroundrootballguying.See2.33
n Treegrillesandguards.See2.41
n Porousresinboundgravel2.52
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SoilstructuresystemsRootCells, StrataCells & Arborsoil
Soilstructuresystem
s
2.23
What is soil structure?Soilstructureisthearrangementofsoilparticles,includingsilt,sandandclaythataggregatetogetherandtheporespacesbetweenthem .Itissoilstructurewhichsupportstreesandplantsandgivesthemfoundationandstability .
Why do we need soil structure systems?Noteverysoilstructureisconducivetothegrowthofplantsandtrees,urbantreesnotleastofall .Treegrowthandfertilityarestronglyinfluencedbysoilstructure,asitaffectsthemovementofair,waterandothernutrientsrequiredfortreestoflourish .Effectivelythearchitectureofthesoil,soilstructureisusuallythemostcriticalelementforthesuccess,orfailure,oftheurbantreetogrowandthrive .Awell-structuredsoilfunctionslikeareservoir,enablesthetreetoaccept,storeandtransmitwater,nutrientsandenergy,providingroominwhichrootscanpropagateandallowingthespaceitneedsforlifeandthenecessarybiochemicalexchangesforgrowth .Toooftentreesareplantedincrampedplantingpitsandinpoorsubsoil,resultinginretardedgrowth,withrootstendingtocolonisetheareaimmediatelyunderneaththepavedsurface,leadingalsotostructuralpavementdamage .Pavedsurfacesrequiresolid,compactedgroundforpedestrianmovementandvehiculartraffic .Withoutcompromisingordamagingthestructuralintegrityofpavedsurfaces,howcanurbantreesbeadequatelyprovidedforintheirurbansetting?
How they workSoilinurbanareasrarelyprovidesthefavourableenvironmentfortreestogrowandflourish .Hardcompaction,lackofaeration,poordrainage,lownutrientlevelsandtheexistenceofpollutantsinsoilstructuresretardrootgrowthandmakeitalmostimpossibleforurbantreestogrowandthrive .Greenleafofferslandscapearchitects,engineersandarboristsstrongsoilstructuresystemsthat,whileconducivetorootgrowth,alsogiveadequatesupportforroadsandpavements .
The products
RootCellthisproduct,developedbyGreenleafinconsultationwithotherbodies,providestheload-bearingsoilstructurethatpreventsthesoilfromdeterioratingandbecominglifelessandcompactedovertime.
StrataCellprovidestherequiredqualitysoilvolumeforextensivetree-rootsystemsandlinkedtreepits
ArborsoilGreenleafsroot-zonemixandload-bearingsoilstructureisused,principally,inareaswherecompactionisnecessary,e.g.,hard-wearingfootpaths.
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2.24
RootCellStructuralrootcellswerefirstdevelopedbyGreenleafin2001asload-bearingstructuresystemscomposedofpipemodulesfilledwithqualitysoil .
Suitableforcarparksandfootpaths,RootCellpreventsthetopsoilintreepitsfrombecomingcompactedby,amongotherthings,thepressurefromsurroundinghardsurfaces .
Thestrongestofthesoilstructuresystems,RootCellallowstreesinurbansettingstohavelarge,healthyrootsystems,thrivinginquality,uncompactedsoil .
Thismodularunitisassembledintoaskeletalframeworkormatrixthatprovideslargevolumesofsoilwithinthesoilprofilefortheeasygrowthofroots,whilealsosupportingpavementloads .With92%soilvolume,RootCellpromotesmultiplerootingpatternsandmaximisestherootarearequiredbyurbantreestogrow .
RootCellisthefirstchoicesystemforconstrictedorawkwardlyshapedtreepits,requiringheavyloadbearingcharacteristics .
StrataCell
Representingthefourth-generationrootcelldevelopment,StrataCellwasdevelopedin2007,primarilytoprovidealargermodulewithbiggerspacesforextensiverootgrowthoflarge-canopytrees .
Workingincollaborationwithotherindustryleaders,StrataCellwasbuiltuponsuccessfultrialsandprojectsthatwerealsoaimedatreducinginstallationandtransportcosts,andimprovingthemodulesrobuststrength .
SoilstructuresystemsRootCells, StrataCells & Arborsoil
RootCell benefits
n RootCellhasbeenindependentlytestedtosustainloadsofupto80tonnespersquaremetreevenlydistributed
n Whenloadedwithtopsoil,aRootCellmoduleis92%soilbyvolume
n Maximisestherootingareaforurbantrees
n Canbeinstalledeasilyinmoduleform
n Constructedfrom100%recycledplastic
n Long-termroot-zonemanagementispossiblewheninstalledinconjunctionwithGreenleafsRootRain&RootDirector
n Promotesmultiple-rootingpatternswhicharemoresuitedtourbanlocations
StrataCell benefits
n Designedtosupportenormousverticalaswellaslateralloads
n Excellentmodularstrength
n Integratedmatrixmeansmodulesaresimpleandfasttoclicktogether
n Inexcessof94%oftotalsoilvolumeisavailablefortree-rootgrowth
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Designedtohighlyadvancedengineeringspecificationstosupportgreaterverticalloads,StrataCellbringstree-rootsystemsclosertopavementsurfaces .Engineershavecalculatedthat,withonly300mmofgranular
pavementdepth,aStrataCellmatrixcansupportmaximumtrafficloads .
Withverticalandlateralforcesalsoconsideredintheengineeringmake-upoftreepits,StrataCellswell-designedmatrixunitslocktogetherwell,formingamonolithicframeworkwithexcellentmodularstrength .HighlysecureconnectorsallowforStrataCellmodulestoclicktogetherfastandsimply .
Itsopenandskeletalstructureprovidesanenormousgrowthzonefordelicaterootsystems,withinexcessof94%ofthesoilvolumeallocatedfortree-rootgrowth .Thesehighsoil-volumetreepitsaredistinctlymoreadvantageousfortreesasoptimumconditionsfornatureandnurturearerecreatedfortreestoliveandflourish .
StrataCellaperturesarebuilttogenerousspecifications,permittingcommonconduits,servicepipesandaerationmechanismstobeincorporatedintothestructuresdesign .
ArborsoilThissand-basedload-bearingsoilstructuresystemisidealforpavingoverinareaswherecompactionisreallynecessary .Itisacompactibleroot-zonematerialandurbantreesand-mixrecommendedforuseasasecondaryrootingzone,inconjunctionwithRootCells or StrataCells .Arborsoilmustbeinstalledwithgreatcare .
n Generouslydesignedaperturespermitcommonconduits,servicepipesandaerationsystems
n Significantvolumereductionforfreightandlowertransportcosts
n Reducedinstallationcosts
n Madefrom100%post-industrialwastematerial
Arborsoil benefits
n Idealforpavingover
n Canbeusedasasecondaryrootingzonebeneathpavements
ExtensivecomputermodelingandlaboratorytestinghaveestablishedStrataCellasthestrongestlargesoilcell .
Soilstructuresystem
s
2.25
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2.26
RootCellSoil structure system
TheRootCellsystemhasbeendevelopedfollowingconsultationwithlandscapearchitects,localauthoritiesandleadingtreeexperts .Theconceptissimpletopsoilisthemostfavourable,naturalrootingmedium .RootCellsprovidetheloadbearingstructurepreventingthesoilfrombecomingcompactedandlifeless .Furthermore,thelongtermrootzonecanbemaintainedbyincorporatingRootRainirrigation/aerationinthedesign .
Typical installation specification
InstallGreenleafrootmanagementsystemcomprisingRootCells,RootDirectorandRootRain PrecinctDoubleInletsystem.
RootCellsshouldbeinstalledonafirm,
Benefits
n LoadbearingRootCellshavebeenindependentlytestedtosustainloadsofupto80tonnespersquaremetreevenlydistributed
n Whenloadedwithtopsoil,RootCellsare92%soilbyvolume
n Maximisesrootingareaforthetree
n Easilyinstalledinmodularform
n Constructedfrom100%recycledplastic
n LongtermrootzonemanagementispossiblewheninstalledinconjunctionwithRootRain&Root Director productsasshown.
n Promotesamultiplerootingpatternmoresuitedtourbanlocations.
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level,freedrainingbase.Thecontractorshouldallowforinstallingalanddraininareaspronetowaterlogging.
RootCellsshouldbeloadedinsituwithagoodquality,freedrainingtopsoil.AsandyloamwithaneutralpHisrecommended.RootCellscanbeloadedwithtopsoilfourlayersatatime.Thesoilmixturemustbedryforthisoperation.
Whereexceptionallyheavyloadingisanticipated,e.g.occasionalHGVoverrun,itisadvisablenottolaymodulesmorethanfourdeep.Theloadcapacitybeginstodecreasewithdepth.Ifindoubt,consultourtechnicaldepartment.
Specifythenumberofmodulestobeusedpertreepit.Quantitywilldependonspaceavailableandbudgetcontactoursalesofficeforcostings.
RootCell Module specification
Productcode GLRCMA
Description Recycledplasticrigidskeletalinterlockingringstructure
Material RecycledHDPE
Dimensions 250mmx250mmx90mm
Loadingcapacity 80metrictonnespersquaremeterevenlydistributedload
Compatible Arborsystem products
n Rootmanagement.See2.02
n Undergroundrootballguying.See2.33
n Treegrillesandguards.See2.41
n Porousresinboundgravel.See2.52
Standard Tree Pit Details
Toclearlyillustratecorrectproductapplication,pleaserefertoourstandardtreepitdetailswhichareinthetreeproductpackagessectionrefs:GR1009andGR1011-GR1018.
RootC
ell
2.27
NotehowRootCellsarelocatedinrelationtotheRoot Director, RootRain Precinctandundergroundguying .
Typical RootCell layouts in plan view
96(2deep)or144(3deep)or192 (4deep)
64(2deep)or96(3deep)or128(4deep)
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2.28
StrataCellSoil structure system
Benefits
n Designedtosupportenormousverticalaswellaslateralloads
n Excellentmodularstrength
n Integratedmatrixmeansmodulesaresimpleandfasttoclicktogether
n Inexcessof94%oftotalsoilvolumeisavailablefortree-rootgrowth
n Generouslydesignedaperturespermitcommonconduits,servicepipesandaerationsystems
n Significantvolumereductionforfreightandlowertransportcosts
n Reducedinstallationcosts
n Constructedfrom100%post-industrialwastematerial
Designedtohighlyadvancedengineeringspecificationstosupportgreaterverticalloads,StrataCellbringstree-rootsystemsclosertopavementsurfaces .Engineershavecalculatedthat,withonly300mmofgranularpavementdepth,aStrataCellmatrixcansupportmaximumtrafficloads .
Largevoidspacebetweencolumns
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StrataC
ell
2.29
Typical installation specification
PleasecontactGreenleafforfullinstallationspecification.
StrataCell Module specification
Productcode GLSCMA
Description Recycledplasticrigidskeletalinterlockingoctagonalstructure
Material Advancedglassreinforcedpolymer
Dimensions 500mmx500mmx250mm
Loadingcapacity 550Kpaverticalload
Compatible Arborsystem products
n Rootmanagement.See2.02
n Undergroundrootballguying.See2.33
n Treegrillesandguards.See2.41
n Porousresinboundgravel.See2.52
Standard Tree Pit Details
Toclearlyillustratecorrectproductapplication,pleaserefertoourstandardtreepitdetailswhichareinthetreeproductpackagessectionrefs:GR1019-GR1023
Interstackedforshipping
EasycliptogethermatrixdesignLoadbearingdeckforspanningsharedutilitytrench
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2.30
ArborsoilCompactible root zone material
AtGreenleaf,wearefrequentlyaskedwhetheroururbantreeproductscanbeusedinconjunctionwithAmsterdamTreeSoilorsimilarrootzonesandmixes .
Weadvisethatthisproductshouldonlybeusedinareaswherecompactionisreallynecessary,i .e .underfootpathsetc .Intheactualtreeplantingpititself,itisalwayspreferabletouseagoodqualitytopsoiltohelpthetreeinitsinitialestablishment .
Webelievethatthesecompactibletreerootzonemixesdohavearoletoplaybutmustbespecifiedandinstalledwithcare .
Somespeciesappeartodowellinthesemixes,othersstruggletoestablish .Researchresultsareatpresentinconclusive .
Benefits
n Usedasasecondaryrootingzoneunderneathpavedareas.
Typical Installation Specification
OnlyspecifyArborsoilinthesecondaryrootingareawhenhavingacompactedsurfaceisunavoidable.
Ensureadequatedrainagetoareasusingthismaterial.Itcanactasasponge,soakingupgroundwaterandstagnating.
Accuratecompactionlevelsarecriticaltotheproductseffectiveness.Thetrenchortreepitshouldbebackfilledinlayers
Arborsoilwasusedasasecondaryrootingzoneunderthispavedpedestrianarea .
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Technical analysis
Ph 7 .5
Phosphorous 20-50mg/100g
Potassium 10-20mg/100g
Magnesium 100-300mg/100g
Organic matter + a range of trace elements 4-6%
Pleasecontactsalesforpricesandavailability .
Compatible Arborsystem products
n Rootmanagement.See2.02
n Soilstructuresystems.See2.23
n Undergroundrootballguying.See2.33
n Treegrillesandguards.See2.41
n Porousresinboundgravel.See2.52
Standard Tree Pit Details
Toclearlyillustratecorrectproductapplication,pleaserefertoourstandardtreepitdetailswhichareinthetreeproductpackagessectionref:GR1015.
300mmthick,eachlayerbeingcompactedto1.5-2.0megapascalsandcheckedwithapenetrograph.
Specifyanadequateirrigation/aerationsystemtotherootzonesuchasRootRainPrecinctwithtwoinletspertree.
Arborsoil orothertreesandmixeswillnotpreventsurfacerooting.WesuggestusinginconjunctionwithRootDirectors,ReRoot300 orReRoot600 todivertrootsintothepreferredrootingarea,preventingrootheaveproblemslateroninthetreeslife.
Arboursoil
2.31
Footpathconstruction
Arborsoilcompactible
rootzonemix(secondary
rootingzone)
PrimaryrootingzoneRootCells(92%
topsoilbyvolume)
RootRainPrecinct
Cleanpea
gravelTopsoil
RootDirector
RootRainPrecinctDIirrigation/aeration
Geotextile
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GuyingandtiesSupport and protection
Greenleaf offersacomprehensiverangeofproductsforguying,tyingandprotectingnewtreeplanting .
ExtensiveresearchhasresultedinthelaunchofthenewGreenleafArborguytreeguyingsystem .Thepatenteddesign,uniquetoGreenleafprovidesfasteasyinstallation .
TheArborguyanchorhasbeendesignedtobeasstreamlinedaspossiblefordrivingintocompactedsubsoils,whilstcombiningsuperbgroundlocktechnologyforsecuretreeanchoringtestingshowsinexcessof1340kgsofupwardforceonjustoneanchordrivenintosubsoilfromgroundlevel .
Ifspecifyingplasticorrubbertreeties,ensurethesearecheckedregularlyduringthemaintenanceperiodandremovedassoonasthetreehasestablisheditsownanchorage .Unremovedtiescaneventuallystranglethetreeasitstrunkexpands .
Analternativeforsmalltreesistospecifyourbiodegradabletreetie .Naturetiemadefromhessian,whichwillbreakdownnaturallyovertimeasthetreeestablishesitsownanchorage .Inexposedareas,itmaybenecessarytoretietreesduringthemaintenanceperiod .
Guyingandties
2.33
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2.34
Thismethodofsecuringtreeshasmanyadvantagesoverstakingandissuitableforlargeroot-balledtrees .TheRootballisheldinpositionbydrivingthreeanchorsintothebaseofthetreepitandthenfasteningtheArborguyrachetstrapasshown .
Ifrequired,thesystemcanbere-tensionedatalaterdate .
Benefits
n AguyingsystemtofullycomplementGreenleaftreepackages
n Designedfortreesintheurbanandruralenvironments
n Aneffectiveandoutofsightmethodofguyingtreesinpreferencetostaking
n Strappingwillnotcuttherootball,thereforenomatsortimberrequired
n Groundanchorsmanufacturedfromadvancedhighstrengthcomposite
Straptobethreadedthroughrings,overrootball,intorachettensionerandtensionedasnecessary .Arborguyanchorsystem,pluscompleteinstallationtoolkitsavailable
ArborguySecuring large root balled trees
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Product specification and codes
Product Code
Arborguystrappedmediumanchorsystemwithdrivein
heavydutycompositeanchors .Includeswebbingstrapand
rachettensioner .Suitablefortreesupto20cmgirth . SASMP
Arborguy strappedlargeanchorsystemwithdrivein
largeheavydutycompositeanchors .Includeswebbingstrapand
rachettensioner .Suitablefortreesupto40cmgirth SASLP
Arborguy strappedanchordeadmanguyingsystemsupplied
with3slipknotguyswebbingstrapandrachettensioner .
Fortreesupto40cmgirth . SASDMA
ToolkitforinstallationofSASMsystemsincludingextralengthdriverod,
driverodrammer,settingtoolanddriverodpullouttool SASKITXMA
ToolkitforinstallationofSASLsystemsincludingextralengthdriverod,
driverodrammer,settingtoolanddriverodpullouttool SASKITXLA Undergroundguyingisthemostunobtrusivemethodforsupportinglargerootballedtrees .
Guyingusingdeadmananchors .Arborguystrappedundergroundguyingsystem
Arborguy
2.35
Arborguy deadman guying system
TheArborguydeadmansystemisidealwherethereisariskofundergroundutilitiesintheimmediatevicinityofthetreepit.
Asshowninthediagram,threedeadmananchors(heavytimbers)areplacedinthebaseofthetreepitinatriangleshapetosecurethewiresto.
Foreachofthethreecables,looptheDringendofeachcablethroughthewireloopontheoppositeendtocreateaslipknotnoose.Thisnooseisthenpositionedovertheendofeachofthethreedeadmananchorsandtensionedupinthecentre.Oncethishasbeendoneinthecentreofeachofthedeadmen(threetimes),thenylonwebbingpassesthroughthesmallloopontheendofeachcableandisratcheteduptightoverthetopoftherootball.
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2.36
TreetiesSecuring large root balled trees
Whenselectingamethodandthematerialfortreetyingthefollowingfactorsshouldbeconsidered.
1. Sizeoftree.
2. Location.
3. Maintenancerequirements.
4. Likelywindloadingandother environmentalconsiderations.
5. Durabilityandcost.
6. Vandalism.
7. Aestheticappearance.
Greenleafstocksanextensiverangeoftreetieproductstosuitmanyvaryingapplications.
Twinstake,beltandsleeve .
Beltandpad . Twinstakebeltandpad
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Arbortie
ThenewArbortieisa600mmlongsupersofttreetiewhichisstrongwhilstofferingsuperiortreeprotection.
Theribbedcushioneffectprovidesgentleyetfirmsupportforthetreeandprotectsthetenderbarklayer.Theelasticityofthesetiesisveryconsiderablewithelongationupto450%.Thismeanstheyremainflexibleandexpandasthetreegrowswithoutdamagingthebarklayer.
ThedesignoftheArbortiemeansitisveryquickandeasytofit.Itissuitableforalltreesizesupto20cmgirthbasedona75cmtreestakediameter.
ManufacturedfromresilientUVstabilisedPVC,theArbortielifespanisbetween5&10years.Itisrecommendedthatthetieismanuallyreleasedoncethetreehasestablisheditsownrootanchorage.
Arbortie
Types of belt
ReinforcedNylonreinforcedrubberbelt,mostpopularversionforlocalauthoritiesandlandscapers
Product Length(m) Width(mm) Code
Reinforced 25 25 GLB25A
Reinforced 25 37 .5 GLB38A
Pads, blocks, collars and sleeves
Blockcode Description Beltsize(mm)
GLPAA Standardpad 25mmbelt
GLPAAA Extralargepad 38mmbelt
GLPBA Chunkypad 25mmbelt
GLPFA Plasticsleeve(300mm) 25mmbelt
GLPFFA Plasticsleeve(300mm) 38mmbelt
Arbortie
Arbortie600mmlongsupersofttreetiewhichisstrong,whilstofferingsuperiortreeprotection .
Code Description Beltsize(mm)
GLAT1 Arbortie 600mm
Treeties
2.37
GLPAAandGLPAAA
GLPBA GLPFAandGLPFFA
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2.38
NaturetieBiodegradable tree tie material
Ingeneral,Naturetiecanbeusedsimilarlytoothertiematerials,butwithouttheneedofaspacerbetweenthetreeandthestake .Thespacercanbeformedbythematerialitself .
Thisproducthasmanyadvantagesoverplasticandrubber .Itwillnotstranglethetreeasthetreegrowsbutwillbiodegradegraduallyasthetreeestablishesitsownrootsforanchorage .
Benefits
n 100%naturalmaterial,environmentallyfriendlyfromsustainablesources.
n Strong,versatileandfasttoinstall.
n Verycosteffectiveforlargetreeplanting/forestryschemes.
n Willnotstranglethetree.
n Reducesmaintenancecosts.
Naturetieaversatileandnaturalproductsuitedtovarioustyingapplications
Product codes
Product Code
Naturetie(30mrolls) GLNTA
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TreeGuardTie
TheGreenleafTree Guard Tieisdesignedtokeepthetrunkofanewlyplantedtreecentralinrelationtothetopofthetreeguard .
Inareallifesituationitisnotalwayspossibletoplantthetreedeadcentralinrelationtothetreeguardtogetherwithbeingverticallyplumb .Withthisinmindtreesareoftenseenchafingatthetopofatreeguardinwindyconditions .Thiscancauseseriousdamagetothetreetogetherwithlookingunsightlyasthetreeisatanundueangle .
TheheavydutybuckletieissecuredbypassingthroughaspecialLshapedbracketatthetopofthetreeguard .Thisisthenjoinedtoanotherbuckledtiewhichsurroundsthetreetrunkandfixestoanotherbracketontheoppositesideofthetreeguard .Thetiedoesnotholdthetreerigidlybutpreventsthepossibilityofthetreetrunkfrommakingcontactwiththetreeguard .
Benefits
n Strong,versatileandfasttoinstall.
n Verycosteffectiveforlargetreeplanting/forestryschemes.
n Willnotstranglethetree.
n Reducesmaintenancecosts.
TreeGuardTiekeepstreecentralwithinguardpreventingchafinginwindyconditions
Product codes
Product Code
Tree Guard Tie GLGTAA
NaturetieandTreeguardtie
2.39
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TreegrillesandguardsAttractiveandfunctional,grilleshaveanimportantroletoplayinmaintaininghealthytreepitconditions .Greenleafsrange,allnamedafterriversinGreatBritain,offervalueformoneyandthequalityyouwouldexpectfromthecountrysleadingspecialistsupplierofurbantreeplantingproducts .
Treegrillesandguards
2.41
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2.42
TreegrillesFully integrated grille systems
Duringthelasttwodecades,Greenleafhasbeendevelopinginnovativeproductstoassisttreesbelowgroundintheirbattletoestablishandgrowinhostileurbanenvironments .NowwiththeArborsystemtreegrillerange,thatsameattentiontodetailhasbeenturnedtotreepitsurroundsystems .
Arborsystemtreesurroundsareengineeredtoanextremelyhighstandardunderrigorousqualitycontrols .GreenleafisanISO9002companyandtakesproductdevelopmentandqualityseriously .Consequently,therangedetailedinthisbrochurerepresentsthelatesttechnologyintreesurrounds .IllustratedarejustsomeofthedesignfeaturesintegraltotheArborsystembrandthathaveliftedourrangetonewlevelsofexcellence .
Benefits
n Enablesthetreetoreceivenaturalwater
n Preventssurroundingsoilfrombeingcompacted
n Addsarchitecturalflairtopavedsurfaces
n AvailableinmanydifferentfinishesincludingpowdercoatingtoanyRALcolour
n Thegrilleframescanbedisassembledonceinstalled.Thisgivesthecontractortheoptionofplantingthetreebeforeorafterinstallation
AvonDTSductileirontreegrillewithintegratedRootRainPrecinct Clydetreegrillewithagalvanisedfinish
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Design
Ourproductdevelopmentteamhasworkedhardtoensurethateventhemoststandarddesignsworkwell,looksmartandgiveatroublefreelife.Researchandtrialshavehelpedustoarriveatthemosteffectiveandrobustcoatingswhereapplicableforourproductrange.
Support frames
Arborsystemsupportframeshaveinvolvedmanyhoursofdevelopmenttoproduceadesignthatiseasytoinstall,vandalresistant,costeffectivetomanufactureandunobtrusiveinuse.Theseframesareengineeredtothehigheststandardsandcanberatedtohandledifferentloadingrequirements.
Inner ring design
Allowsforaneatandprofessionalcentralopening.Thisgivesadditionaltensilestrengthaswellasprovidingfixingpointsfortheverticalsteelguardsystem.
Irrigation inlet fitting
ArborsystemRootRainPrecinctirrigationinletfittinganotherexampleofproductsengineeredforpurposeheavydutycastLM6materialgivingapermanentaccesspointforwaterandair,sovitalforthetree.Plus,retainingbrackettoensuresimpleinstallationandalignmentofirrigationpipe.
Built for strength
Thesetreesurroundsaremanufacturedtowithstandtheeverydaytrafficandloadingsexpectedofurbanhardscapes.Ourproductadvisorscanworkwithyoutoensurethatthegrilleyouselectissuitedtothetypesoftrafficyouareexpectingtousethearea.TheDTSgrillerangeisdesignedtowithstandanyreasonabletrafficoverrun.
Integral features
Thesehighqualitycastductilegrillescanincorporateintegralaperturesforirrigationaerationinletsanduplighters.Twistlockaperturesecuresthefittingstoavoidtheftorsubsurfacesettlementdifferentiation.
Treegrilles
2.43
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2.44
DTS Grille Systems
ThestandardArborsystemtreegrillerangeshownhereisdesignedtointegratewithavarietyofdifferentsettings.Choiceofdesignwillbeinfluencedbythefollowingaspects:
n Existingsiteparametersanddesignelements
n Accessrequirements
n Anticipatedvehicletraffic
n Disabledaccess
n Designerspersonaljudgementonaesthetics.
Arborsytemgrillesintegratewithbelowgroundrootmanagement,irrigation,aerationandguyingsystems.Itisimportantthatthebelowgroundaspectoftreepitdesignisgivencarefulconsiderationatthedesignstage.Treeliteratedesignwillpaydividendsforyearstocomeintheformofhealthy,attractivetrees.
StandardtreegrillesFully integrated grille systems
Themajorityofourtreegrillesaremanufacturedfromcastductileiron .However,wealsoofferarangeoffabricatedgrilleswhichcanbeproducedinmildorstainlesssteel .Ourrangeoftreegrillescanbemadetosuitanyapplication .Iftheyaregoingtobesubjecttoexceptionalloading,heavydutyframeswillberequiredforthecastductilegrillesandthefabricatedsteelgrilleswillbemanufacturedfromlargersectionmaterial .
Thestandardfinishismattblackpolyesterpowdercoated .Thishighqualityfinishisextremelydurable .AnycolourfromtheRALrangeisavailableasanoption .Forextraprotectiononmildsteelproductszincgalvanisingisstandard,followedbyahighqualitycoatingtoanyRALcolour .
Somegrillesandguardsarenowavailablefromstock .PleasecontactGreenleafsaleslineforacompetitivequotationandstockavailability .
Clydegrille,incentralLondon,manufacturedfromgrade316stainlesssteel .
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Adur
Avon
Tay
Clyde Dart
Yare
Standardtreegrilles
2.45
Typical installation specification
Ensurethedeptharoundedgeoftreegrilleframehasaminimumof100mmofconcrete.Reinforceifloadingrequiresit.Placeouterframeonconcreteensuringthattopislevelandataheighttosuitadjacentsurfacing.Whenconcretefoundationhassetsufficiently,fittreegrillesegmentsandfastenanti-vandalbolts.RootRainPrecinctinletandverticalsteelguardcannowbefitted.
Standard tree grille range availability
Sizesquare 1000mm 1200mm 1500mm 1800mm
Adur ADUR10A ADUR12B ADUR15A
Avon AVON10B AVON12B AVON15A AVON18B
Clyde CLYDE10GA CLYDE12GA CLYDE15GA CLYDE18GA
Tay TAY10B TAY12B TAY15A
Internalaperturediameter 500mm 600mm 600mm 600mm
Sizerounddiameter 1000mm 1200mm
Dart DART10A DART12A
Yare YARE10A YARE12A
Internalaperturediameter 500mm 600mm
NOTE:Othersizesavailabletospecialorder
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2.46
TreegrillesFully integrated grille systems
Welldesignedgrillesenablethetreetoreceivenaturalwater,preventsurroundingsoilfrombeingcompactedandaddarchitecturalflairtothepavedsurface .
Designsvarytofunctionunderdifferentcircumstances .Grillepatternswithsmallergapsarechosenwhereminimumchangetothesurfaceisneeded .Theywillretainplantingmaterialbutallowthefreepassageofpushchairs,wheelchairsandsupermarkettrolleys .
Availableinawiderangeofdifferentsizes,treegrillescanbespecifiedaspartoftheArborsystempackage,incorporatingverticalguard,rootmanagement,irrigationanduplighterintegration .
Greenleafhavedevelopedarange
offourdesignlinetreegrillesto
complimentlandscapingschemes
ofthehighestquality .Individual
datasheetsareavailableforeach
grilledesign .Thisrangecanbe
manufacturedinalmostanysizeto
suityourdesigns .
Castle
n Allowsspecifierstocontinuetheirchoiceofpavingoverthetreepitarea
n Availabletocomplywithallregularloadspecifications.
n Removableinnersectionallowsfortreegrowth
n Heavydutyrecessedtreegrille
n Built-intreeirrigation/ventilationinlets
n Robustgalvanisedconstruction
n Availableindifferentsizes
Boulevard
n Designflexibilityadditionalparallelsegmentsavailableprovideforlongertreepitsurfaceprotection.
n Designmaximisestreepitsurfaceopennessforwaterandair
n Naturalrustoxidisationprovideslongtermprotection
n Highstrengthductileironconstruction
n ContemporarydesignCastletreegrille,allowsspecifierstocontinuetheirchoiceofpavingovertreepitarea
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Sales and service: 01424 717797Technical assistance: 01424 433233Sales Fax line: 01424 533003Email: [email protected]: greenleaftrees.co.uk
Design Guide Trees in the urban environment (Edition 7)
GreenleafGreenleaf
Treegrilles
2.47
Medway
n New600mmsquarecompacttreegrillesystem.
n Ovalcentralaperturetoallowfittingoftreestake.
n Verystronglasercutsteelconstruction.
n SuppliedwithRD510ARootDirector.
n DesigncanbecustomizedtoincludenamesofStreetscape/Districtetc.
n Highqualitypowdercoatedfinishesavailableindifferentcolours.
ArborAdvance
Bespoke
n Fordesignerswhowishtocreatetheirownsignatureonaproject,bespoketreegrillescanbeaninvaluabletool.
n Ourproductdesignteamwillbepleasedtoworkwithclientstocreateaworkingtreegrilledesignfromtheirvisualideas.Contactoursalesofficefordetails.
n Designscanbecreatedfromarangeofmaterialsi.e.CastIron,DuctileIronandStainlessSteel.
n Awidechoiceoffinishesisavailablefromgalvanizingtopowdercoating.
n Atrulymoderndesign,bothpracticalandeye-catching
n Nonslipventilatedsurface
n Excellentsolutionfordisabledaccessorshoppingtrolleyareas
n Attractiveminimalistlines
n Lowmaintenanceandrobustdesign
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2.48
VerticaltreeguardsProtection in an urban setting
Benefits
n Protectionagainstvandalismandaccidentaldamage
n DesignedtofitwithinGreenleaftreegrillerange
n Addstoqualitydesign
Bespoke
Inanurbansetting,youngtreesinparticulararevulnerabletodamagefrombicyclesandotherequipment,aswellasgratuitousvandalism .TreeguardsofferedbyGreenleafareofstrongconstructionandvaryingdesignandprovidetheidealanswertosuchproblems .
Treeguardscanequallymakeahighqualityvisualdesignstatementonpublicrealmlandscapeschemes .Theguardsshownmaybefittedtomediumorheavydutyframesorgroundfixedwhenusedinparkland .Thesimpleadjustingmechanismallowsguardstobeeasilysetonmostgradients .
Eachguardtypeismanufacturedinanumberofstandardsizestofitallgrilles .Phoneoursaleslineforpricesandavailability .