roof edge performance and testing

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Hickman Engineered Systems Provider Number: H518 Roof Edge Performance and Testing Course Number : WPH2011FF Speaker Name/s Date

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The recent rash of hurricanes and other strong wind events has shown us how important proper roof edge design is in preventing roof and property damage. This presentation discusses the importance of roof edge and shows how to design and specify roof edge systems.

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  • 1. Hickman Engineered SystemsProvider Number: H518Roof Edge Performance and TestingCourse Number : WPH2011FFSpeaker Name/sDate

2. Credit(s) earned on completion ofthis course will be reported to AIACES for AIA members. Certificates ofCompletion for both AIA membersand non-AIA members are availableupon request.This course is registered with AIACES for continuing professionaleducation. As such, it does notinclude content that may bedeemed or construed to be anapproval or endorsement by theAIA of any material of constructionor any method or manner ofhandling, using, distributing, ordealing in any material or product.___________________________________________Questions related to specific materials, methods, andservices will be addressed at the conclusion of thispresentation. 3. This presentation is protected by US and International Copyright laws.Reproduction, distribution, display and use of the presentation without writtenpermission of the speaker is prohibited. Hickman Engineered Systems 2013Copyright Materials 4. This course will cover roof edge performance and testingand review the ANSI/SPRI ES-1 standard that is part ofthe International Building Code. The next generation ofthe standard, ANSI/SPRI/FM 4435 will also be coveredalong with the GD-1 standard that addresses gutters.The course provides an overview of how to select theproper roof edge system for a building so that it meetscode and stays on the building.Course Description 5. Learning ObjectivesLearning Objective 1: Understand the ANSI/SPRI ES-1 StandardLearning Objective 2: Understand the ANSI/SPRI/FM 4435 ES-1 StandardLearning Objective 3: Understand the GD-1 StandardLearning Objective 4: Specify metal edge systems and gutters that meetcode and stay on their buildings.At the end of the this course, participants will be able to: 6. ANSI/SPRI ES-1,ANSI/SPRI/FM 4435 ES-1,and GD-1 7. Hickman Engineered Systems 8. Company History In business since 1945 Invented 1st pre-manufactured roof edge system Has over 25 patents Continues to be an innovator & leader in the industry Located in Asheville, NC 9. What is a Roof Edge? 10. What is a Roof Edge? Acts as an effective termination and transition between theroof and other building components Aesthetic feature to the building exterior Most importantly, it is a roofs first line of defense againstwind! http://www.youtube.com/watch?v=L9ngIY_fzgg 11. When done properly 12. When done properly 13. When done properly 14. When done poorly 15. Three SPRI Edge StandardsANSI/SPRI ES-1 Standard that is included in IBCANSI SPRI/FM 4435 ES-1 Revised standard just approved by ANSIGD-1 Standard for gutters currently going through the ANSIreview process 16. Topics for Discussion Wind Basics Importance of Roof Edge Perimeter Roof Edge Details & Standards Using the ANSI/SPRI ES-1 Standard 17. WIND BASICS 18. HurricanesKatrina, Charley, Ivan & Rita 19. It doesnt take a hurricaneThunderstorms also create dangerous winds High School GymMuscatine, IA Straight line winds toreroof membrane and roofedge 20. It doesnt take a hurricaneThunderstorms also create dangerous winds Blown pavers inBirmingham, AL 110 mph straight-linewinds recorded 21. It doesnt take a hurricaneThunderstorms also create dangerous winds One type of straight-linewind, downburst, cancause damage equivalentto a strong tornado Straight-line winds canexceed 100 mph! 22. Roofing Industry Committee On Weather Issues (RICOWI) 165 inspections wereconducted, including steepslope and low slope roofing 7 teams of investigators toPunta Gorda, FL after Charley 5 teams to the FL/AL borderafter Ivan 23. Key Findings from RICOWI ResearchPublished in October, 2005 Issue of RCI Nearly 95% of roof failureswere caused by poorworkmanship andsubstituted materials 24. Key Findings from RICOWI ResearchPublished in October, 2005 Issue of RCI Cleat gauge was oftenless than recommendedby FM Global andANSI/SPRI ES-1 25. Key Findings from RICOWI ResearchPublished in October, 2005 Issue of RCI Cleat gauge was often lessthan recommended by FMGlobal and ANSI/SPRI ES-1 Failure of roofing systems wasbecause of system failure atthe perimeter The membrane attachment tothe deck cannot resist theloads created when theperimeter securement fails 26. Importance of Perimeter Flashing The integrity of theperimeter flashing is acritical first line ofdefense against rooffailure.- Phil Smith, FM Global 27. Importance of Roof Perimeter During 1992s HurricaneAndrew, it is estimated that75% of all losses were relatedto roof failure A study of 145 FM Globallosses involving built-up (BUR)systems showed 85 losses(59%) occurred because theroof perimeter failed- FM Global Approved ProductNews No. 2, 2005 28. Visualization of Flow over Roof(Wind Oblique to Wall)AcceleratedFlowFlow SeparationMajor VortexUp-DraftDown-Wash 29. Visualization of Flow over Roof 30. Wind EffectsWind Pressures on Coping and Fascia 31. Perimeter Roof EdgeDetails & Standards SMACNA NRCA Details FM ANSI/SPRI ES-1 32. SMACNA Sheet Metal andAir ConditioningContractors NationalAssociation Concentrates on basicsheet metal design 33. NRCA National RoofingContractors Association NRCA Roofing andWaterproofing Manual Integrates edge shapeswith roofing system 34. FM I-49 FM Global Loss Prevention DataSheet 1-49for roofing contractors Labor intensive toduplicate 35. FM Global Approval Guide List of approvedmanufacturers - allproducts tested andapproved by FM forWind ZoneClassifications FM visits facilities 36. ES-1 Certified Roof Edges Edge devicesdesigned and testedto resist calculatedoutward pressures Complies with code 37. Wind Design Standard for Edge SystemsUsed With Low Slope Roofing Systems 38. ANSI/SPRI The American National Standards Institute (ANSI) coordinatesthe development and use of voluntary consensus standards inthe United States SPRI is the recognized technical and statistical authority on theSingle Ply Roofing Industry 39. What is ANSI/SPRI ES-1? First Roof Edge Standard for Low Slope Roofs Reference for those who design, specify, fabricate, or install lowslope roof edges Based upon ASCE 7-02 Minimum Design Loads for Buildings andother Structures Provides a calculation method to determine uplift pressures Prescribes test methods to determine an edge systems resistance towind pressures 40. 1504.5 Edge Securement for Low Slope RoofsLow slope membrane roof systems metal edgesecurement, except gutters, installed in accordance withSection 1507, shall be designed and installed for windloads in accordance with Chapter 16 and tested forresistance in accordance with ANSI/SPRI ES-1, except thebasic wind speed shall be determined from Figure 1609.(Figure 1609 is a reference to the latest ASCE Wind Speed Map 7-02)2003, 2006 and 2009 International BuildingCode Requires ES-1 41. Why Not Gutters? 42. State Adoption Status ES-1 is in 2003, 2006 and 2009 IBC States Adopt IBC Into State Code All States Have Adopted 2003 or later versions 43. www.iccsafe.orghttp://www.iccsafe.org/gr/Pages/adoptions.aspx 44. How to UseANSI/SPRI ES-1 45. General Roof Edge Design Considerations Wind Speed Building Height Building Exposure (Terrain) Importance Factor 46. Wind Speed Wind Speed to betaken fromANSI/ASCE 7-02 Basic Wind Map ofthe USA or theauthority havingjurisdiction 47. The building height shall be measuredfrom ground level to the mean height ofthe roof section under design.Building Height 48. The terrain surrounding a buildingwill influence the exposure of thatbuilding to the wind.Building Exposure 49. Exposure B Suburban 50. Exposure C Open Terrain 51. Exposure D Sea Coast 52. Adjustment for the criticality of the buildingCategory ICategory IICategory IIICategory IVImportance Factor 53. Category I Low hazard to human life 54. Category III Substantial hazard to human life 55. Category IV Essential Facility 56. Category II All others 57. Importance FactorNature ofOccupancyCategory Non-HurricaneProneHurricaneProneLow Hazard I 0.87 0.77Other II 1.00 1.00SubstantialHazardIII 1.15 1.15EssentialFacilitiesIV 1.15 1.15 58. Calculating roof edge design pressureP = GCp x qz x I x kztP = Design PressureGCp = Gust factor times Pressure Coefficientqz = Velocity pressure at building heightkzt = Topographic FactorI = Importance Factor Multiplier 59. Safety Factor? ANSI/SPRI ES-1Calculation does not include a safety factor.It is left to the designers discretion to add asafety factor ANSI/SPRI/FM 4435 ES-1The calculation includes a safety factor of 2.0 60. Example 80-foot tall Hospital in Knoxville, TN Wind speed from the Map = 90 mph Exposure B = Velocity pressure 41 psf Importance Factor Category IV Building = 1.15 61. www.wph.comwww.spri.orgNew HotelBillingsMT 62. www.wph.comwww.spri.org 63. Test ProtocolsThere are three tests that make up theANSI/SPRI ES-1 Standard:RE-1RE-2RE-3 64. TEST METHOD RE-1Tests Edges ability to restrain membrane pull* Only required for Mechanically attached or Ballasted membrane when there is nopeel stop or first row of fasteners is greater than 12 from the edge 65. TEST METHOD RE-1Sample Size ANSI/SPRI ES-1A minimum 12 length mock-up of the termination system ANSI/SPRI/FM 4435 ES-1A minimum length mock up ofthe termination system so as toinclude a minimum of 3fasteners at standard spacing 66. TEST METHOD RE-1Angle of Load ANSI/SPRI ES-145 degree angle to theroof deck ANSI/SPRI/FM 4435 ES-125 degree angle to theroof deck 67. TEST METHOD RE-1Load Force ANSI/SPRI ES-1100 pounds per LFpass/fail ANSI/SPRI/FM 4435 ES-1Test to Failure 68. TEST METHOD RE-2ANSI/SPRI ES-1 andANSI/SPRI/FM 4435 ES-1 All parts of the testspecimen shall be full sizein all dimensions Length as designed forfield use (8 minimum) 69. ES-1 Test Protocols RE-2 tests the outwardpull for the horizontalface of an edge device 70. TEST METHOD RE-3ANSI/SPRI ES-1 andANSI/SPRI/FM 4435 ES-1 Bi-Directional test forcoping caps -Face andTop loadings appliedsimultaneously Repeated with loads onback and top 71. ES-1 Test Protocols RE-3 tests upwardand outwardsimultaneous pull -the horizontal andvertical flanges of aparapet coping cap 72. Corner Region ANSI/SPRI ES-1 Double Fasteners in the Corner Region ANSI/SPRI/FM 4435 ES-1 Use System Tested to Resist Calculated Loads Fabricate Miters From That System 73. GD-1 Load Calculations Similar to ES-1 Tests similar to ES-1 Static Load Downward Based on Gutter Volume Cycled Load Outward on Face to Failure Cycled Load Upward on Bottom to Failure 74. Other Components of the ANSI/SPRI Standard Metal Thickness Galvanic Compatibility and Resistance Appliances Substrate 75. Metal Thickness Galvanized Steel 26 Gauge 24 Gauge 22 Gauge 20 Gauge Aluminum .032 .040 .050 .063 .080 Copper 16 oz. 20 oz. 76. Galvanic Compatibility and ResistanceANODIC OR LEAST NOBLE(CORRODED END)MagnesiumZincAluminumCadmiumSteelStainless SteelLeadTinCopperTitaniumSilverGoldCATHODIC OR MOST NOBLE(PROTECTED END) 77. Appliances 78. Substrates Wood Masonry Steel 79. Nailer AttachmentIn order for the edge metal to perform as tested the nailer must be properly secured.ANSI/SPRI ES-1 does not include tests for nailersFM Data Sheet 1-49 is a good reference 80. Nailer AttachmentANSI/SPRI/FM 4435 ES-1 includes two loadrequirements for nailer attachment:Pull-outPull through 81. Why use the Standard? When roof edges are designed and tested to resist theanticipated wind forces, you get a better roof Without a performance based test, its difficult compareproducts or defend a specification or detail fromsubstitution Establishes a minimum acceptable criteria for performance It is in code! 82. Why use the Standard? 83. Thank you! 84. This concludes The American Institute of ArchitectsContinuing Education Systems CourseHickman Engineered SystemsPO Box 15005, Arden, NC 28704800.892.9173www.wph.com