招标代理公司（立即查看） 受业主单位（立即查看） 委托，于2025-08-18在采购与招标网发布 道路画线及标志牌安装分包寻比招采文件。现邀请全国供应商参与投标，有意向的单位请及时联系项目联系人参与投标。 Thesecondphaseofthefour-laneroadprojectinKumasi,Accra,GhanaRoadmarkingandsignboardinstallationsubcontractingcomparisontenderdocument1. SolicitationNoticeProjectIdentification:OpenInquiryandSelectionforSubcontractingProcurementofRoadmarkingandSignboardinstallationfortheKAIIHighwayProjectinGhanaTimeframe:Quotationdeadline:（略）:（略）August（略）,（略）GhanaiantimeQuotationopeningtime:（略）:（略）August（略）,（略）. TechnicalSpecifications2.1TechnicalrequirementsforRoadmarking2.1.1Painttypes:Commonlyusedhot-meltreflectivemarkingpaint,two-componentreflectivemarkingpaint,ambienttemperaturesolvent-basedwater-basedmarkingpaintlessusedontrunkroads.Selectionshouldbebasedonroadgrade,environmentalconditions,expectedlifespanandcost.2.1.2Reflectiveperformance:Glassbeads:Adequate,high-qualityreflectiveglassbeadsmustbepre-mixedandspreadtoensurevisibilityofthemarkingsatnightandinadverseweatherconditions.2.1.3Dimensionalaccuracy:Thewidth,length,andintervalssuchasdottedlinesofthemarkingsmustbeconstructedstrictlyinaccordancewiththedesigndrawings,witherrorscontrolledwithintheallowablerange.2.1.4Lineshape:Theedgesofthemarkinglinesshouldbestraight,clearandsmooth,withoutburrsorjaggededges.Curvemarkingsshouldhavesmoothtransitions.2.1.5Graphicsymbols:Specialmarkingssuchasarrowheads,text,diamond-shapedblocks,pedestriancrossingwarningmarkings,decelerationmarkings,etc.mustbeaccurateinshape,sizeandproportion.2.2Technicalrequirementsforsignboards2.2.1Structuralstrength:Thesignsupportstructurecanwithstandthedesignedwindspeed,andthesignboardensuressafetyandstabilityundervariousextremeconditions,withoutoverturning,breakingorcollapsing.2.2.2Materialsandanti-corrosion:Supportsposts,beams,etc.aretypicallymadeofhot-dipgalvanizedsteelpipes,H-beamsoraluminiumalloys,andthethicknessofthegalvanizedcoatingmustcomplywiththespecificationrequirementse.g.,≥（略）gm².Anti-corrosiontreatmentisrequiredfortheweldedparts.Thestrength,sizeandrebarconfigurationofthefoundationconcreteshallmeetthedesignrequirements.2.2.3Markinglayout:Material:Aluminumalloyplatesarecommonlyusedforthebaseplate,andthethicknessisdeterminedaccordingtosizeandwindresistancerequirementsusually1.5mm-3.0mm.Forlargesigns,extrudedaluminumalloyprofilescanbeusedforsplicing. Reflectivefilm:ThisisthecorematerialandmustcomplywiththerelevantstandardsforroadconstructioninGhana.Performancerequirements:Theinitialretroreflectivitycoefficientmustmeetthestandard,alongwithgoodweatherresistanceUVresistance,highandlowtemperatureresistance,wetheatresistance,saltsprayresistance,solventresistance,adhesionandservicelifetypically7-（略）years.Printingandpasting:Text,symbols,andbordersmustbemadestrictlyinaccordancewithspecifiedfont,size,color,andshape.Reflectivefilmpastingmustbesmooth,bubble-free,wrinkle-free,crack-free,andwithoutliftededges.Theseamsshouldbeflat,tightandinaproperdirectionespeciallyforlargesigns.3Constructionprocessrequirements 3.1Roadmarking 3.1.1Roadsurfacetreatment:Beforeconstruction,theroadsurfacemustbeclean,dry,freeofdust,oilstains,looseparticlesandotherimpuritiesthataffectadhesion.Grindorapplyaspecialprimerifnecessary. 3.1.2Constructionconditions:Ambienttemperatureandroadsurfacetemperaturemustbewithintheallowablerangeofthecoatingespeciallyforhotmeltcoatings.3.1.3Applicationprocess:Strictlycontrolthemeltingtemperaturetoavoidoverheatingandcharringorinsufficienttemperatureaffectingfluidity,applicationthickness,premixingratioofglassbeadsandtopcoatuniformity,densityandembeddingdepth.3.1.4Applicationprocess:Trowelingspraying:Ensuresmoothoperationoftheequipmentanduniformapplication.3.1.5Applicationprocess:Dryingandcuring:Trafficmustbeopenedonlyaftersufficientdryingcuringtimetopreventbeingcarriedawaybywheelsordamaged.3.2Installationofsignboards3.2.1InstallationpositionandAngle:Theforwarddistance:Warning,prohibitiveanddirectionalsignsshouldbeplacedatacertaindistanceinfrontofthelocationwheretheyneedtobeidentifiedorobservedforwarddistance,whichisdeterminedbasedonthedesignspeedoftheroad.Clearheight:Theheightfromtheloweredgeofthesignboardtotheroadsurfacemustmeetthespecificationrequirements.Lateraldistance:Thedistancefromtheedgeoftheroadsidesigntotheedgeoftheearthenshoulderortheouteredgeofthecurbstoneshouldbe≥（略）cm.Whenthewidthofthecurbislimitedorthereisanobstacle,safetymeasuresshouldbetakenorothersupportmethodsshouldbechosen.Avoidobstructions:Itisnecessarytoavoidbeingobstructedbytrees,billboards,structures,othersigns,etc.,andensurethatthedriverisclearlyvisiblewithintheprescribedvisibilitydistance. 4.BusinesstermsSubcontractingforroadmarkingandsignboardinstallation:Subcontractorprovideslabor,materialsandequipment.Thesubcontractor'squotationshouldincludethecostofmarkingandsignboardproductionmaterials.FortheKA2highwayprojectinGhana,machineryandequipmentformarkingandsignboardproductionandinstallationarenotmentioned. 5.AcquisitionofprocurementdocumentsAllunitsthathavebeeninvitedorregisteredthroughthepublicsolicitationofpotentialsuppliersandareinterestedinmakingabidwillcollectthedocumentsintheprojectconferenceroomuntil（略）:（略）onAugust（略）,（略）,