Technical Bullet Series on Clay Brick Pavers Shorefair Drive, Winston-Salem, NC 27105 |...

2701 Shorefair Drive, Winston-Salem, NC 27105 | pinehallbrick.com | 1-800-334-8689

TechnicalBulletSeriesonClayBrickPavers

#6–EdgeRestraintsAbstract–ThisTechnicalBulletdetailsdo’sanddon’twithedgerestraintsalongwithprovidingadviceanddetailsonthemostcommontypesofedgerestraintsbeingusedinsegmentalpaving.Aqualitypaverinstallationshouldlastfordecades.Byprovidinghorizontalinterlock,edgerestraintsareanessentialelementtothelongevityofanysegmentalpavementinstallation.Withoutedgerestraints,paverscan“unravel”overtimeresultinginpavermovement,openjointsandpaverdamage.Somepaverinstallersignorethecriticalroleofedgerestraintsandsimplydonotinstallthembuttheimportanceofedgerestraintscannotbeoverstated.Itisimportantthatthedesignerspecifiesedgerestraintsandfollowuptobesurethattheyareinstalled.EdgeRestraintsToAvoid

• CommonBackfill• LandscapeTimbers• PlantersorGardenEdging

EdgeRestraintTips

• Asloadincreases,thesignificanceoftheedgerestraintincreases.• Asailorbandoffullpaversarerecommendedattherestraintedgeinordertomove

smallercutpiecestothepavementinterior.Thisincreasesinterlockwithinthesystem.• Inanyconditionwherebeddingsandmayclogadrainagepointormigrateintoopen

gapsintherestraint,geotextilefabricshouldbeusedtokeepbeddingsandinplace.• Buildingfoundationsmaketerrificedgerestraints.Dependinguponconditions,a

drainagesystemmayberequiredunderthepavementatthefoundation.

ManufacturedEdgeRestraintsThemostcommonedgerestraintsusedtodayaremanufacturedrestraintsmadeofPVCplasticormetalthatareinstalledbynailinglandscapespikesintoyourcrushedgravelbaseandbackfillingwithtopsoil.Manufacturededgerestraintscanbeusedinbothstraightandcurvedapplication.Manufacturededgerestraintsshouldbeinstalledontopofthebasenotthebeddingsand.PVCedgerestraintsarethemosteconomicalandcanbeinstalledeasilybyaDIYer.

Detail1:PVCEdgeRestraint

TroweledConcreteEdgeRestraintsAnothercommontypeofedgerestraintistroweledconcrete.Formanyyearsthiswasconsideredtheleastexpensiveedgerestraintrequiringonlyabagofconcreteandlimitedlabortoinstall.Overtimethismethodofinstallationprovedtobeinadequate.Theconcretewouldcrackandbreakdownandtheedgerestraintwouldfail.Contractorslookedforwaystoimprovethismethodandtodayoftenlaysteelrebarintheconcretetoprovideadditionalstrengthtothistypeofedgerestraint.

Detail2:TroweledEdgeRestraint

MasonryEdgeRestraintsTherearemanymasonrymaterialsusedasedgerestraints.Someoftheseincludegraniteblock,precastconcreteorbrickadhered/mortaredtoaconcretecurb.Itisimportantfortheedgerestraintoextendintothecrushedgravelbaseandtobackfillwithcrushedgraveltoprovidesupporttotheedgerestraint.

Detail3:MasonryEdgeRestraint

HeavyVehicularEdgeRestraintADOTapprovedconcretecurbisrecommendedinheavyvehicularapplications.Thetypicalwidthisatleast8”withadepththatextendsintothesubgrade.Curbshouldbevertical,sothatthewidthofthejointisconsistent.Angledcurbingwillresultinawidejoint,whichcanresultinsandlossandsubsequentlossofinterlock.Cutasphalthasproventonotbesufficientunderheavyvehicularloading.Edgerestraintmustbebackfilledappropriatelytowithstandloading.

Detail4:HeavyVehicularEdgeRestrain–BituminousSettingSystem