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Flashings Fasteners & Accessories


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Flashings Fasteners & Accessories

  1. 1. Flashings, Fasteners & Accessories
  2. 2. Flashing Designs <ul><ul><li>Also Referred to as Trims </li></ul></ul><ul><ul><li>Press/Folder Broke </li></ul></ul><ul><ul><li>Strippable Film Applied </li></ul></ul><ul><ul><li>Made Per Order in Shop </li></ul></ul><ul><ul><li>Standard Shape, Custom Sizes </li></ul></ul><ul><ul><li>10’-0” Standard or up to 20’-0” </li></ul></ul><ul><ul><li>Architectural “Box” Flashings </li></ul></ul><ul><ul><li>Commercial Sculptured </li></ul></ul>Architectural / Residential / Commercial
  3. 3. Press/Folder Broke Flashings
  4. 4. Arch. / Res. Flashings
  5. 5. Architectural Eave/Drip Edge Note: Panel field hemmed.
  6. 6. Architectural/Residential Gutter Note: Post-hung gutter system.
  7. 7. Architectural Valley Note: Water diverter should equal panel rib height.
  8. 8. Architectural Rake/Gable Note: Rake/Gable flashings should be installed working from bottom to top of roof.
  9. 9. Architectural Rake/Sidewall
  10. 10. Architectural Ridge/Hip
  11. 11. Vented Ridge
  12. 12. Sculptured Commercial Flashings
  13. 13. Commercial Gutters Sculptured Post-Hung Gutter System Box Pre-Hung Gutter System
  14. 14. Flashing Packaging Shrink Wrapped Wood Crate
  15. 15. Four questions to help determine the proper fastener: 1. What materials are being fastened? 2. What are the load requirements? 3. What are the service requirements? 4. What is the environment? Fasteners/Screws
  16. 16. <ul><li>List each type of material (steel, wood, rigid insulation). </li></ul><ul><li>List the thickness of each material. (Determines attachment thickness) </li></ul>#1 What materials are being fastened ? Steel Purlin Wood Decking Steel Decking
  17. 17. Allow at least 3 threads to extend beyond all materials. (Screw will be at least 1/2” – 1” longer than attachment length.) Attachment thickness + ½” # 1 What materials are being fastened?
  18. 18. <ul><li>Uplift load Relates to the pullout / tensile / pullover strength of the screw – washer. </li></ul><ul><li>Shear load Relates to the shear strength / ductility of the screw. </li></ul>Bending #2 What are the load requi rements? Shear Shear Tensile Pullover
  19. 19. <ul><li>Is there... </li></ul><ul><li>Vibration? </li></ul><ul><li>Expansion & Contraction? </li></ul><ul><li>Prying on the Joint? </li></ul>Identify conditions that can affect the screws performance. #3 What are the service requirements?
  20. 20. <ul><li>Determine... </li></ul><ul><li>Corrosion potential </li></ul><ul><li>Dissimilar metals </li></ul>#4 What is the environment?
  21. 21. 1. CONCEALED FASTENER CONDITIONS Fastener/Screw Applications
  22. 22. 2. EXPOSED FASTENER CONDITIONS Fastener/Screw Applications
  23. 23. <ul><li>To eliminate confusion and assure the proper fastener is used, specifications for tapping screws should be written to include: </li></ul><ul><li>Thread diameter </li></ul><ul><li>Threads per inch </li></ul><ul><li>Screw Length </li></ul><ul><li>Point Type </li></ul><ul><li>Type of screw </li></ul><ul><li>Drive size </li></ul><ul><li>Head style </li></ul><ul><li>Fastener material </li></ul><ul><li>Finish / plating / corrosion resistance (salt spray) </li></ul>Fastener/Screw Terminology
  24. 24. Description : #12-14 x 1-1/4” DP2 Self-Drilling Screw. 5/16” Hex Washer Head. Undercut with EPDM Sealing Washer. Carbon Steel. Zinc Plated with 1,000hrs salt spray coating. Fastener/Screw Terminology Head Style Major Diameter Threads Per Inch Fastener Length Point Type #12 - 14 x 1-1/4” DP2 5/16” HWH Major Diameter Threads Per Inch Fastener Length Point Type Head Style
  25. 25. <ul><li>2. “Fine” Thread </li></ul><ul><li>Use in thick metal </li></ul><ul><li>Slower to install. </li></ul><ul><li>Provides more thread engagement. </li></ul><ul><li>1. “Coarse” Thread </li></ul><ul><li>Use in thin metal and wood. </li></ul><ul><li>“ Steep” thread installs faster. </li></ul><ul><li>“ Steep” thread loosens more quickly. </li></ul>Fastener Thread Types TWO GENERAL TYPES OF THREADS
  26. 26. Hex Head Pan Flat Wafer Hex Washer Flat Cuntersunk Head and drive systems for a variety of conditions Pancake Fastener/Screw Head Styles
  27. 27. Point Type Drilling Thickness DP1 Thin (.018” - .090”) DP2 Thin Medium (.035” - .140”) DP3 Medium (.090” - .250”) DP4 Medium/Heavy (.145” - .375”) DP5 Heavy (.250” - .500”) A - DP1 Light Gauge (Thin Metal) B - DP5 Heavy Gauge The thicker the material to be fastened, the larger the point “Type”. Self Driller Point Types B A
  28. 28. Stainless Steel Cap <ul><li>Zinc and Aluminum alloy is compatible with sheet coatings. </li></ul><ul><li>Uncoated zinc head will oxidize and turn black in color. </li></ul><ul><li>Uncoated head will not turn black in color. </li></ul><ul><li>May react with Galvalume in severe coastal conditions. </li></ul>Zinc Cap / Cast Head Fasteners with 20 Year Warranties
  29. 29. Flange Seal Head Sealant Materials EPDM: Standard (Non conductive) Neoprene: Petrochemical <ul><li>Optimal sealing performance when installed at an angle. </li></ul><ul><li>Provides greater pullover strength. </li></ul><ul><li>Nicer installed appearance. </li></ul><ul><li>Paint damage minimal. </li></ul><ul><li>More back-out resistance </li></ul>Bonded Washers Fastener/Screw Washer Types
  30. 30. <ul><li>Fastener Materials and Strength </li></ul><ul><li>Carbon Steel (C1018-C1022) case hardened </li></ul><ul><li>410 stainless steel bright case hardened </li></ul><ul><li>Modified 304 stainless steel - Cold worked </li></ul><ul><li>316 stainless steel - Cold worked </li></ul>Fastener/Screw Materials PSI (000) Material Strength
  31. 31. <ul><li>Material and Finish </li></ul><ul><li>18-8 Stainless Steel (302, 304, 305, 316) - Passivated </li></ul><ul><li>410 Stainless Steel – Passivated and Plated </li></ul><ul><li>410 Stainless Steel – Passivated </li></ul><ul><li>Carbon Steel – Long-life Coated </li></ul><ul><li>Carbon Steel - Zinc Plated </li></ul>Increased Corrosion Resistance Fastener/Screw Corrosion Long Life Coated Stainless Steel Zinc Plated
  32. 32. 1/8” Pop Rivet Pop rivets are used to hold two pieces of sheet metal together, common at flashing laps, using a 2-Step method; Step #1 - 1/8” Hole is Drilled Through both Pieces. Step #2 - Insert Pop Rivet in Hole with Rivet Gun
  33. 33. Standing Seam Panel Clips <ul><li>1. Floating Clip: </li></ul><ul><li>Independent base and tab. </li></ul><ul><li>Used with panel lengths greater than 30’-0”. </li></ul>TWO GENERAL TYPES OF CONCEALED CLIPS <ul><li>2. Fixed Clip: </li></ul><ul><li>One solid piece. </li></ul><ul><li>Used with panel lengths less than 30’-0” or snap down panels . </li></ul>Note: Base of floating clip should be centered when installed.
  34. 34. Thermal Expansion & Contraction Definition: The natural characteristic of a length of metal to expand or contract relevant to a change in the metals temperature. Heat and sun expands/Cooling and shade contracts.
  35. 35. Sealants TWO GENERAL FORMS OF SEALANT <ul><li>1. Tube Sealant </li></ul><ul><li>Polyurethane based. </li></ul><ul><li>Average usage per tube of 25’-0”. </li></ul>
  36. 36. Sealants <ul><li>2. Roll/Tape Sealant </li></ul><ul><li>Double beaded butyl sealant </li></ul><ul><li>Roll lengths of 40’-0”. </li></ul>TWO GENERAL FORMS OF SEALANT
  37. 37. Roof Boots/Jacks Note: Silicone boots used on high temp penetrations.