Technical Bullet Series on Clay Brick Pavers · 2019-12-05 · Technical Bullet Series on Clay...
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2701 Shorefair Drive, Winston-Salem, NC 27105 | pinehallbrick.com | 1-800-334-8689 Technical Bullet Series on Clay Brick Pavers #3 – Truncated Dome ADA Pavers Abstract – This Technical Bullet details the rules around the use of Truncated Domes to comply with ADA and Public Right Of Way (PROWAG) Guidelines. Pine Hall Brick Truncated Dome ADA pavers comply with the ADA requirement for detectable warnings for use in the Public Right Of Way according to R304 Guidelines. q Available in 2 ¼” x 4” x 8”. Stock Red color. English Edge colors available as special order. q Available in Heavy Vehicular 2-3/4” thickness as a special order q Paver may be laid in a running bond or herringbone pattern.
Transcript of Technical Bullet Series on Clay Brick Pavers · 2019-12-05 · Technical Bullet Series on Clay...
2701 Shorefair Drive, Winston-Salem, NC 27105 | pinehallbrick.com | 1-800-334-8689
TechnicalBulletSeriesonClayBrickPavers
#3–TruncatedDomeADAPaversAbstract–ThisTechnicalBulletdetailstherulesaroundtheuseofTruncatedDomestocomplywithADAandPublicRightOfWay(PROWAG)Guidelines.PineHallBrickTruncatedDomeADApaverscomplywiththeADArequirementfordetectablewarningsforuseinthePublicRightOfWayaccordingtoR304Guidelines.
q Availablein2¼”x4”x8”.StockRedcolor.EnglishEdgecolorsavailableasspecialorder.q AvailableinHeavyVehicular2-3/4”thicknessasaspecialorderq Pavermaybelaidinarunningbondorherringbonepattern.
Picture1:PineHallBrickADAPaver–RedR221–WhereDetectableWarningSurfacesAreRequired
DetectablewarningsurfacesshallcomplywithR304.
AdvisoryR221DetectableWarningSurfaces.Detectablewarningsurfacesarerequiredwherecurbramps,blendedtransitions,orlandingsprovideaflushpedestrianconnectiontothestreet.Sidewalkcrossingsofresidentialdrivewaysshouldnotgenerallybeprovidedwithdetectablewarnings,sincethepedestrianright-of-waycontinuesacrossmostdrivewayapronsandoveruseofdetectablewarningsurfacesshouldbeavoidedintheinterestsofmessageclarity.However,wherecommercialdrivewaysareprovidedwithtrafficcontroldevicesorotherwisearepermittedtooperatelikepublicstreets,detectablewarningsshouldbeprovidedatthejunctionbetweenthepedestrianrouteandthestreet.
Picture1:PineHallBrick’sADAClayPavers
R304DetectableWarningSurfaces
R304.1General.DetectablewarningsshallconsistofasurfaceoftruncateddomesalignedinasquareorradialgridpatternandshallcomplywithR304.
R304.1.1DomeSize.Truncateddomesinadetectablewarningsurfaceshallhaveabasediameterof23mm(0.9in)minimumto36mm(1.4in)maximum,atopdiameterof50percentofthebasediameterminimumto65percentofthebasediametermaximum,andaheightof5mm(0.2in).
AdvisoryR304.1.1DomeSize.Wheredomesarearrayedradially,theymaydifferindiameterwithintherangesspecified.
R304.1.2DomeSpacing.Truncateddomesinadetectablewarningsurfaceshallhaveacenter-to-centerspacingof41mm(1.6in)minimumand61mm(2.4in)maximum,andabase-to-basespacingof17mm(0.65in)minimum,measuredbetweenthemostadjacentdomes.
AdvisoryR304.1.2DomeSpacing.Wheredomesarearrayedradially,theymaydifferincenter-to-centerspacingwithintherangespecified.
R304.1.3Contrast.Detectablewarningsurfacesshallcontrastvisuallywithadjacentgutter,streetorhighway,orwalkwaysurfaces,eitherlight-on-darkordark-on-light.
AdvisoryR304.1.3Contrast.Contrastmaybeprovidedonthefullrampsurfacebutshouldnotextendtotheflaredsides.Manypedestriansusethevisualcontrastatthetoeoftheramptolocatethecurbrampopeningfromtheothersideofthestreet.
R304.1.4Size.Detectablewarningsurfacesshallextend610mm(24in)minimuminthedirectionoftravelandthefullwidthofthecurbramp(exclusiveofflares),thelanding,ortheblendedtransition.
R305.4.2DetectableWarnings.MediansandpedestrianrefugeislandsshallhavedetectablewarningscomplyingwithR304atcurbrampsandblendedtransitions.Detectablewarningsatcut-throughislandsshallbelocatedatthecurblinein-linewiththefaceofcurbandshallbeseparatedbya61cm(2.0ft)minimumlengthofwalkwaywithoutdetectablewarnings.Wheretheislandhasnocurb,thedetectablewarningshallbelocatedattheedgeofroadway.
Foracompletereview,gotowww.access-board.gov.
DetectableWarningsMaybeRetroactive
AccordingtoaspecialistattheDepartmentofJustice,detectablewarningsarerequiredathazardousvehicularareasforareascurrentlyunderconstructionandareasalreadyconstructed.Forthelatterareas,responsiblepartieswillneedtoaccessthefeasibilityofinstallingdetectablewarningsundera“readilyachievable”standard.Duringthesuspensionperiod,manymunicipalitiesaddressedhazardousvehicularareasbyusingcontrastingcolorsandsometypeoftexturechangefromtheadjoiningwalkareas.
Inthoseinstances,changestotruncateddomesmaynotbenecessaryifresponsiblepartiescandemonstrateequivalentfacilitation.EquivalentfacilitationisdefinedinthePublicRigfhts-of-WayGuidelinesas:
R102EquivalentFacilitationNothingintheserequirementspreventstheuseofdesigns,products,ortechnologiesasalternativestothoseprescribed,providedtheyresultinsubstantiallyequivalentorgreateraccessibilityandusability.
StateorLocalGovernmentsMayEnhanceADARequirementsStateorlocalgovernmentsmayaddrequirementstoADAguidelinesinordertoprotectandprovidefortheircitizenry.Whenconflictsbetweenfederalandlocalstandardsarise,thetougherstandardshallbeimplemented.DesignersshouldtakespecialcareinordertoidentifyandunderstandanyspecialprovisionaddedtoanADArequirementbyastateorlocalauthority.
