b'TECHNOLOGYVegetated Roof AssemblyApplying the CAN/CSA A123.24 Standard Test Method for Wind Resistance of Vegetated Roof Assembly for code complianceBy/par Mauricio Chavez and Bas BaskaranToitures vgtalisesApplication de la norme CAN/CSA A123.24Mthode dessai standard pour la rsistance au vent des toitures vgtalisespour assurer la conformit au code M arket share of Vegetated Roof Assembly (VRAakaL a part de march des toitures vgtalises (TV, ou Green Roofs) has been increasing largely due to thetoits verts) a augment en grande partie parce que claim that VRA helps to reduce the heat island andces systmes aidentrduire llot de chaleur et reduces water runoff, in addition to bringing amenity spaces andle ruissellement, en plus dapporter des espaces dagr-increasing biodiversity into urban areas. VRA have been widely usedment et une biodiversit accrue dans les zones urbaines. for more than two decades. Valuable information and guidance toLesTVsontbeaucouputilisesdepuisplusdevingt ensureasafeinstallationandadequateoverallperformanceisans. Des renseignements et des conseils prcieux pour currentlyavailable(ANSI/SPRI-RP-14(2016),ANSI/GRHC/ garantiruneinstallationscuritaireetuneperformance SPRI VR-1 (2011), FM 1-35 (2007), FLL (2018), Toronto Greenglobaleadquatesontactuellementdisponibles(ANSI/Roof Construction Standard). However, it should be mentionedSPRI-RP-14 [2016], ANSI/GRHC/SPRI VR-1 [2011], FM that these documents are only design guidelines and offer building135 [2007], FLL [2018], Toronto Green Roof Construc-officials little in terms of determining pass/fail criteria for codetion Standard). Toutefois, il faut mentionner que ces docu-compliance verification, in particular resisting design wind forces.ments ne sont que des lignes directrices. Figure 1. VRA example in Toronto (Photo courtesy ofFigure 1. Exemple de TVToronto (photo courtoisie Kees Govers from LiveRoof Ontario Inc.) de Kees Govers de LiveRoof Ontario Inc.)30 ROOFING CANADA FALL/WINTER 2021'