b'BUILDING CODESentence(4)inthe2018Edition ofArticle5.2.2.2.nolongerpermits theuseofFMapprovals,specifica-tionsortestmethods.Now,theuser isrequiredtodeterminewinduplift resistanceofmembraneroofing assembliesinaccordancewiththe requirements of CAN/CSA-A123.21. Alternatively,sentence(5)saysthat aroofassemblywithprovenpast performance does not have to be testedusing CSA-A123.21. Howdoesonedeterminethe resistanceofaroofassemblyusing Since 1987, LAING has been providing qualityCSA-A123.21? And what does the CodeRoofing, Sheetmetal, Waterproofing, andmean by proven past performance? Wall System Installations for Commercial,Industrial and Large-Scale Residential Projects. Serving Western Canada and Beyond.Code compliance pathway no. 1: tested assembliesArticle 5.2.2.2. tells you what you must do, but it doesnt tell you how to do it. So, here is a step-by-step description of the process.First, the Design Authority 2must calcu-latetheSWLsfortheroof. 3 Aregis-tered professional, skilled in the workwww.LAINGROOFING.comofDivisionB,Part4,calculatesthe SWLs as they pertain to the three key roof zones stipulated in Part 4 of the Code: the corner, edge and field zones. ThecornerzonesalwaysexperienceCustom Flashings andthe highest negative (uplift) wind loads;Roofing Productslower SWLs apply to the edge and field zones, respectively (Figure 1).Short turn around time for Next,specifytheuseofatestedBetter most custom productsassemblyastheprincipalvehicleofPeopleProductsService Menzies quality guaranteeddesign. As straightforward as this may sound,itiscriticaltodothisclearly and to let go of old template language that no longer serves your design objec-tives. For example, simply state that the roof must be constructed with a roofSaddle Flashings Curved Flashings Outside Corners Inside CornersassemblytestedunderCSA-A123.21. Furthermore, get rid of any old template referencestoFM.Theyarentvalid any longer. Specifications that refer to FMonlyconfuseroofingcontractors who know the Building Code and arePitched BUR Goosenecks Scuppers Giant B VentlookingforthenecessaryinformationMenzies Metal Products creates high quality custom products to make sure every to build a Code-compliant roof. project you handle is done right & finished on timeFamiliarizeyourselfwiththelingowww.menzies-metal.comof roof assembly tests, such as AARS,Surrey Location NanaimoLocation WestKelownaLocationPARS and MARS, 4and use it in your1937060th Avenue 881 Maughan Road Unit 2 -1400 Industrial Roadspecification.ManufacturersspeaktheSurrey BC V3S 3M2 Nanaimo BC V9X 1J2 West Kelowna BC V1Z 1G5Tel: (604) 530-0712 Tel: (250) 711-2585 Tel: (778) 755-6081lingo,andsodoroofingcontractors.Fax: (604) 530-8482 Fax: (250) 722-3886 Fax: (778) 755-6083When you use these acronyms and other www.rcabc.org l21'