b'TECHNOLOGIEOver the past 10 years, the NationalAu cours des dix dernires annes, leausoulvementparleventdelen-Research Council of Canada (NRCC),CNRC a dploy des efforts constantssemble de toituremembrane a dj in collaboration with the green roofpour laborer une norme dessai consen- tdtermine,conformmentla androofingindustry,andunderthesuelle permettant dvaluer la rsistancenormeCSA-A123.21,larsistanceau umbrella of CRCA, have been puttingauventetlaconformitdestoituresvent ainsi dtermine est une rsistance forthconsistenteffortstodevelopvgtalises. Par consquent, en 2015,conservatriceacceptable.Toutcart aconsensus-basedteststandardtolanormenationaleCSAA123.24-15adans les lments ou les mthodes de evaluateVRAwindresistancefortlabore.Cestlapremirenormeconstructionncessiteunervalua-demonstrating conformance to code. Asau monde qui traite de linteraction entretion de la rsistance au vent selon la a result, in 2015, the national standardles TV et le vent. En 2019, le CNRC etnorme CSA-A123.24. CSAA123.24-15StandardTestses collaborateurs ont livr une nouvelle Method for Wind Resistance of Modularversion de la norme CSA A123.24-21 quiDbit dair Vegetated Roof Assembly (MVRA) waslargit la porte pour inclure les toituresSelon la norme CSA A123.24-21, lva-developed. The CSA A123.24-15 is theconstruites sur place. luationdelarsistanceduventdoit first standard worldwide that addressestre effectue dans un centre capable thewindMVRAinteractionthroughArrachement par le vent de produire un dbit de flux horizontal alaboratory-basedtestmethodology.Selon la norme CSA A123.24-21, lva- de 240 km/h (150 mph). Une maquette In2019,tomeettherequirementofluation de larrachement d au vent doitdetoiturevgtaliseestsoumise thegreenroofindustry,NRCCandtre conformela norme CSA A123.21- une varit de flux oblique (45o ) pour collaborators completed the VRA R&D20. Toutefois, la norme CSA A123.24-21valuerlarponseauxconditionsles anddeliveredanewversionofthestipulecequisuit: silarsistanceplus critiques. standard(CSAA123.24-21Standard TestMethodforWindResistanceof VegetatedRoofAssembly)which expands the scope to include the built- The CSA 123.24-21 test method is in-placeroofassembly(BVRA)winda practical engineering solution for resistance evaluation.demonstrating VRA conformance to codeUplift testingAccordingtotheCSAA123.24-21, the VRA wind uplift evaluation should follow the procedures described in CSALa mthode dessai CSA 123.24-21 est une A123.21-20 Standard Test Method forsolution dingnierie pratique pour dmontrer la theDynamicWindUpliftResistance ofMembrane-RoofingSystems.conformit des toitures vgtalises au codeHowever,theCSAA123.24-21states that:ifthewindupliftresistanceof the membrane roofing assembly used in the VRA has already been determinedAt Wellington Motor inaccordancewithofCSA-A123.21Freight we know that the wind uplift resistance of membranewhen it comes to shipping roofingassemblysodeterminedisangoods efficiently, acceptableconservativewinduplifttheres no substitute for resistanceoftheVRA.Anyvariationexperience and reliability. inthecomponentsormethodsof construction of the membrane roofingWe have succeeded in assemblyforwhichawindupliftconsolidating over 150 resistancehasbeenobtainedwarrantssmall to mid-size carriers the wind uplift resistance of the VRA tothroughout the U.S. and be determined in accordance with CSA- Canada, giving us a loyal A123.24.fleet of over 1000 trucks at Flow testingour immediate disposal.According to the CSA A123.24-21, the VRAwindflowresistanceevaluation1-877-549-6344 shall be conducted in an airflow facilitywww.wellingtongoc.comcapableofgeneratingahorizontal AUTOMNE/HIVER 2021 COUVERTURES CANADA 31'