b'2), where Q iis the maxi- Eq. 4: DET = W/water that is permitted to beblockage has occurred, and 2)Whenthesespecificationsarein-mumreleaseratefromW 100 detention,t detained to minimize unin- trafficorremedialworksoncorporated into the National Plumb-each drain (ft 3 /s) and Q n stormwater,t tentional adverse effects. or around the roof, to ensureingCode(NPC)andtheNational is the release rate per inchWhat Are the Structuralall drainage holes are clear andBuilding Code of Canada (NBCC), it ofponding(ft 3 /s/inch).Specifications for NBSCRHow Do You Assess thefree draining. will remove the regulatory barrier for Performance Evaluation? Quality Assurance Metrics2.Inspect and clear any build-upthe market penetration of the NBSEq. 2: D R= Q i/ Q n D max Prior to the NBSCRdebris and leaf litters from eachCR in Canada.There are three structural specifi- outlet during a seasonal visit. ZahraJandaghianandBasBas-2. Detention Time:cations to be determined for NBS Installation? 3.Inspectthewaterproofingkaran are with the National Research CR performance evaluation: AnelectronicorsuitabletestmembraneatalljunctionsCouncil of Canada (NRCC).Stormwater detention lag (T lag ) is calculated with1.Storage volume on the roofshould take place on the completedof penetration to ensure it is metrics related to changesby calculating available roofroofing assembly prior to the NBSfirmly adhered to the detail. Referencesin magnitude or timing ofarea without the equipment CR installation. The satisfactory1.BaskaranB.A.,VanReenen discharge, including the lagor structures that may inter- waterproofing integrity certificationHow Can the NBSCRD.,OvertonJ.andLiuK. time that is the time betweenfere with stormwater storagemust be retained. Any nonconform- Assist the Canadian2009. Engineering Performance and roof slope. ing work shall be documented andof Garden Roofs in North (Ca-the start of a rainstorm and2.Load imposed on the roof- verified such that corrections can beIndustry? nadian) ClimatesFive Years the start of discharge (Eq. 3).ing assembly by calculatingmade to conform to the quality as- NRCCwilldeveloptheneces- ofFieldData;Proceedingsof Detention increases with a1) the traditional structuralsurancemetrics.Thein-situtestedsary requirements and specificationstheRCI24 th International slower discharge.loads consisting of the deadvalues should be higher than the re- forthecodificationoftheNBSConvention.weight of the roofing struc- quired design loads. CR by: 2.Jandaghian Z., Saragosa J. and Eq. 3: T lag = T Tdischarge stormwatertureandmaterials,plusan1.DeterminationofclimaticBaskaranB.A.2022.Nature-allowanceforliveloadap- Is the Maintenance ofloadfortheNBSCRbased Solutions on Commercial 3. Detention Capacity: plied from snow falling onRoofing Assembly Requireddesignerstoobtainthere- Roofs (NBSCR) to Mitigate Volumetric water storagetheroof/rainfallevents,to Enhance the Lifecycle ofquired stormwater intensity,Urban Flooding: Literature Re-(DET), referred to as deten- and 2) the stormwater load,duration and frequency. view and Progress Report.tion capacity, is quantifiedwhichisbasedonthecli- NBSCR? 2.Developmentofacompre- 3.Zhu Y., Doshi H. and Jandaghi-in per cent as the volume ofmatic load and prediction ofYes, maintenance is critical to thehensiveguidelineandthean Z. 2022. The Risk Reduc-stormwater detained over aextreme storm fall intensity,viability of the NBSCR function.bestmanagementpracticestionDesignoftheVegetated period of time (W ),duration and frequency. Therefore, it is recommended to: incollaborationwithin- Roofing Assembly (VRA) and detention,trelative to the volume of3.Waterproofingandinsula- 1.Inspect and check the outletdustrythroughextensiveStormwater Detention Assem-stormwater event (W )tion requirements specifyinganddrainsystemfollowinglab and field evaluations forbly (SDA) for Use in Canadi-(Eq. 4). stormwater,t by the amount of the storm- 1) storm events, to ensure noNBSCR. anBuildings.BREATHE EASY, heres our product listAVAILABILITY AND FORMATS BITUMAR INC. CANADIAN ASPHALT INC.(MONTREAL) (HAMILTON, ON)PRODUCTS BULK BURPAK BULK Barrel (keg)(50 lb bags) (100 lb)LOW ODOUR oxidized asphaltwith an odour inhibitor (suppressant) withoutany added PPA in the oxidation process. T2, T3, T4 T2, T3, T4 T2, T3, T4 T2, T3, T4Benets: Less polluting. The kettles andtankers stay cleaner. 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