1. What you MUST KNOW about theCanadian Supplement to NAFS-08BCBEC FALL CONFERENCESEPTEMBER 24, 2014PRESENTED BY AL JAUGELIS

2. Topics covered1. Performance Grade review2. Use and limitations of the CanadianSupplement3. Four common mistakes specifiersmake (FUTURE)4. Review & summary 3. 1. Performance Grade review 4. NAFS in NBCC Part 99.7.4.2. General1) Manufactured and pre-assembled windows, doors and skylightsand their installation shall conform toa) AAMA/WDMA/CSA 101/I.S.2/A440, NAFS North AmericanFenestration Standard/Specification for Windows, Doors, andSkylights (Harmonized Standard),b) A440S1, Canadian Supplement to AAMA/WDMA/CSA101/I.S.2/A440, NAFS North American FenestrationStandard/Specification for Windows,Doors, and Skylights, 5. NAFS in NBCC Part 55.10.2.2. Applicable Standards1) Windows, doors and skylights shall conform to the requirements ina) AAMA/WDMA/CSA 101/I.S.2/A440, NAFS North AmericanFenestration Standard/Specification for Windows, Doors, andSkylights, andb) CSA A440S1, Canadian Supplementto AAMA/WDMA/CSA 101/I.S.2/A440,NAFS North American FenestrationStandard/Specification for Windows,Doors, and Skylights.Continued . . . 6. NAFS in BCBC Part 5 (and Part 9)2) Performance grades for windows, doors and skylightsshall be selected according to the Canadian Supplementreferenced in Clause (1)(b) so as to be appropriate forthe conditions and geographic location in which thewindow, door or skylight will be installed. 7. What is Performance Grade? = The American ABC ratingfor air-water-structuralperformance 8. Performance Grade the American ABC ratingC-ratingB-ratingA-rating Air Leakage Test(Pass/Fail)PG 9. Performance Grade the American ABC ratingC-ratingB-ratingA-rating Air Leakage Test(Pass/Fail)PG 10. What is different aboutPerformance Gradein Canada?= Specify Air & Water separatelyfrom Design Pressure 11. Choose Performance Grade on basis of design pressure 12. PGChoose Performance Grade on basis of design pressureSpecify: PG 30, Water test pressure 220 Pa 13. Choose Performance Grade on basis of design pressure 14. PGChoose Performance Grade on basis of design pressureSpecify: PG 30, Water test pressure 290 Pa 15. Primary and Secondary DesignatorsManufacturer name series/model of productClass CW PG30: Size Tested 800 x 1500 mmDesign Pressure (DP) 2400 PaWater Penetration Resistance Test Pressure 290 PaCanadian Air Infiltration/Exfiltration A3 LevelConforms to AAMA/WDMA/CSA 101/I.S.2/A440-08 and CSA A440S1-09PrimarySecondaryPrimary and secondary designators allow Air, Water andStructural ratings to be specified and reported separately 16. Primary and Secondary DesignatorsManufacturer name series/model of productClass CW PG30: Size Tested 800 x 1500 mmDesign Pressure (DP) 2400 PaWater Penetration Resistance Test Pressure 290 PaCanadian Air Infiltration/Exfiltration A3 LevelConforms to AAMA/WDMA/CSA 101/I.S.2/A440-08 and CSA A440S1-09PrimarySecondaryPrimary and secondary designators allow Air, Water andStructural ratings to be specified and reported separately 17. Performance GradeUseful resource: 18. 2. Use and Limitations of CSA A440S1-09,the Canadian Supplement to NAFS 19. So, how do I determine whatPerformance Grade I needfor a particular building? 20. NAFS in BCBC Part 5 (and Part 9)2) Performance grades for windows, doors and skylightsshall be selected according to the Canadian Supplementreferenced in Clause (1)(b) so as to be appropriate forthe conditions and geographic location in which thewindow, door or skylight will be installed. 21. Performance Grade, Water Test PressureThese properties determined using Canadian Supplement, basedon the following input variables: 22. Performance Grade, Water Test PressureThese properties determined using Canadian Supplement, basedon the following input variables: Location Code/Supplement has climate data for > 600 locationsacross Canada Fenestration height above grade Terrain: Rough, Open or in between 23. Why is location important? Wind pressures and precipitation vary by location 24. Why is height important? Positive wind pressure increases with building height Windows/doors on upper floors subject to higher windpressures, higher driving rain wind pressures 25. Why is terrain important? Buildings and trees moderatethe effects of wind, reducedesign wind pressure Open terrain: FULL EXPOSUREto wind pressure Rough terrain: SIGNIFICANTMODERATION of windpressure 26. Terrain defined Open vs. Rough terrainTerrain definitions inBuilding CodeTerrain definitions inSupplement[Open] terrain is level terrain with onlyscattered buildings, trees or otherobstructions, open water orshorelines. . .Open terrain level terrain withrelatively few buildings, trees, or otherobstructions and relatively little openwater or shoreline.[Rough] terrain is suburban, urban orwooded terrain extending upwind fromthe building uninterrupted for at least1 km or 20 times the building height,whichever is greater.Rough terrain suburban, urban, orwooded terrain that extends upwindfrom a building and that isuninterrupted for at least 1 km or10 times the building height, whicheveris greater. 27. Terrain defined in Code: BCBC 4.1.7.1.(5) [Open] terrain is level terrain with only scattered buildings,trees or other obstructions, open water or shorelines. . .= No protection from wind [Rough] terrain is suburban, urban or wooded terrainextending upwind from the building uninterrupted for at least1 km or 20 times the building height, whichever is greater.1 km= Significant protection from wind,lower design pressure thanrough terrain 28. Terrain definitions illustrated: Penticton, BCOpenterrain 29. Terrain definitions illustrated: Penticton, BC Is the building inthe center of thecircle in roughterrain? 30. Terrain definitions illustrated Is the building inthe center of thecircle in roughterrain? City of Pentictonbulletin clarifiesthe extent ofrough terrain 31. ExampleMixed use multifamily buildingin Langford, BC 32. Example Fenestration Height above Grade: 15 m 33. Example Terrain? Open?Rough] terrain issuburban, urban orwooded terrainextending upwindfrom the buildinguninterrupted for atleast 1 km 34. ExampleBuilding information: Location: Langford municipality Height of fenestration product: 15 m Terrain: Open Whats your next step? Pick a calculator? QAI Cascadia Fenestration Canada 35. http://qai.org/PerformanceCalc/ 36. http://qai.org/PerformanceCalc/ 37. http://www.cascadiawindows.com/nafs 38. http://www.cascadiawindows.com/nafs 39. http://codecalc.fenestrationcanada.ca/ 40. ExampleBuilding information: Location: Langford municipality Height of fenestration product: 15 m Terrain: Open Result? PG30, 360 Pa Water Test PressureOops! Building inspector says:Take out the windows.Correct rating: PG45, 360.What happened? 41. Example Langford Municipality . . . 42. Location, location, locationLesson learned: First, consult the Authority Having Jurisdiction in casethey dont agree with the climate loads in theSupplement 43. Abbotsford example 44. What else do we need to knowabout theCanadian Supplement?Its Limitations . . . 45. 1. Calculation precision Supplement recognizes three ways to determine windloads:1. Detailed engineering calculations per Part 4 of Code themost accurate2. Simplified formula anyone can use less accurate but moreconvenient 46. 1. Calculation precision Supplement recognizes three ways to determine windloads:1. Detailed engineering calculations per Part 4 of Code themost accurate2. Simplified formula anyone can use less accurate but moreconvenient3. Tables based on the simplified formula least accurate,most convenient 47. 1. Calculation precision Formula method uses 1/50 HWP from Supplement tableor Code Table method often requires you to round up to thenext highest columnVictoria 1/50 HWP = 0.57 kPa 48. Online calculators compared 49. Online calculators comparedCalculator SupplementDataCalc Method Victoria, BCOpen TerrainQAICascadiaFenestrationCanada 50. Online calculators comparedCalculator SupplementDataCalc Method Victoria, BCOpen TerrainQAI 2013 Formula 35CascadiaFenestrationCanada35 51. Online calculators comparedCalculator SupplementDataCalc Method Victoria, BCOpen TerrainQAI 2013 Formula 35Cascadia 2009 or 2013 Table 40FenestrationCanada3540 52. Online calculators comparedCalculator SupplementDataCalc Method Victoria, BCOpen TerrainQAI 2013 FormulaCascadia 2009 or 2013 TableFenestrationCanada2013 Table354040 53. Online calculators comparedVictoria Open (Formula method) = 1600 Pa16001690Victoria Open (Table method) = 1690 Pa 54. Calculation precisionsummary Depending on which simplified method is chosen, in asmall number of cases the answers will differ . . . thiscan have a significant difference when it results in a 5psf jump in Performance Grade In the Victoria, example, PG40 would exclude use ofmost sliding sash products 55. 2. Terrain definitions Apply only to clear-cut open or rough terrain Building officials are not engineers, and are not in aposition to make open/rough judgement calls In BC, most building jurisdictions are declaringthemselves to be open terrain. No argument. 56. 3. Simplified method limitations Apply only to level ground = slope of 10% or less Does NOT APPLY to buildings on:Hills Escarpments Steep slopesFor these conditions wind loads must be determined usingPart 4 of Building Code (engineering) 57. 3. Simplified method limitationsHills Escarpments SlopesFor these conditions wind loads must be determined usingPart 4 of Building Code (engineering) 58. 4. Simplified method vs. Part 4 calcs Supplements simplified methods easy to use butprovide conservative (= safe) (= higher) designpressures Fenestration engineers will likely determine lowerdesign pressures for many buildings More detailed calcs Consider building shape 59. ConclusionUse and Limitations of Canadian Supplement Code directs us to use it Building officials have first say over climate data Terrain determinations can be challenging Simplified method to determine wind/water loads: Limited to level ground (not to buildings on hills,escarpments, or steeper slopes ground) May give different answers to the same question May lead to different (more conservative) values thanPart 4 engineering 60. 3. Review and summary 61. ReviewAmerican Performance Grade:- PG30Canadian Performance Grade:- PG30- Water test pressure 290 Pa- Air Infiltration/Exfiltration: A3 62. ReviewCanadian Supplement takesguesswork out of B and CratingsBased on objective criteria,more detailed than A440-00 UG 63. ReviewOnline calculators simplify theprocess, but you still need to knowSupplements limitations,andneed to Know what youre doing 64. ReviewCheck with AHJ before assumingwhich climate data to use . . .Code, Supplement, andSupplement version 65. ReviewSupplements simplified methodsapply to level terrain . . .Not to steep slopes, hills, orescarpments 66. ReviewSupplement can give you morethan one design pressure . . .. . . or Performance Grade . . .and may be higher than DPfrom a competent engineer 67. ReviewTerrain definitions look simple,but require judgment inapplication . . .* AHJ may decide for youon Part 9 buildings * 68. ReviewUsing NAFS and theCanadian Supplementis not as straightforwardas we would like . . . 69. Reviewfor more information. . .Visit theNAFS in Canada Blog 70. Discussion + QuestionsFOR FURTHER INFORMATION PLEASE VISIT rdhbe.com