SECTION 07610

SHEET METAL ROOFING AND CLADDING

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PART 1 GENERAL

1.1 SECTION INCLUDES

  1. Structural standing seam roof system.
  1. RELATED SECTIONS
  2. Section 05120 - Structural Steel: Tolerances for primary and secondary building structure supporting framework.
  3. Section 07210 - Building Insulation: Rigid insulation at insulated walls and roof decks.
  4. Section 07620 - Sheet Metal Flashing and Trim: Installation requirements.
  5. Section 07710 - Gutters and Downspouts: Roof edge coordination and attachment provisions.
  6. Section 07900 - Joint Sealants: Installation requirements.

1.3 REFERENCES

  1. 1996 Low Rise Building Systems Manual, Metal Building Manufacturers Association, Inc., Cleveland, OH, 1996.
  2. AISI CF00-01, "A Design Guide for Standing Seam Roof Panels", American Iron and Steel Institute, 2000.
  3. AISI CF97-01, "A Guide for Designing with Standing Seam Roof Panels", American Iron and Steel Institute, 1997.
  4. ASTM A 653, "Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process," American Society for Testing and Materials, 1998.
  5. ASTM A 755 - Standard Specification for Steel Sheet, Metallic Coated by the Hot-Dip Process and Prepainted by the Coil-Coating Process for Exterior Exposed Building Products.
  6. ASTM A 792 - Standard Specification for Steel Sheet, 55 percent Aluminum-Zinc Alloy- Coated by the Hot-Dip Process.
  7. ASTM C 920 - Standard Specification for Elastomeric Joint Sealants.
  8. ASTM C 1311 - Standard Specification for Solvent Release Sealants.
  9. ASTM E 1680 - Standard Test Method for Rate of Air Leakage Through Exterior Metal Roof Panel Systems.
  10. ASTM E1646 - Standard Test Method for Water Penetration of Exterior Metal Roof Panel Systems by Uniform Static Air Pressure Difference,
  11. ASTM E 2140 - Standard Test Method for Water Penetration of Metal Roof Panel Systems by Static Water Pressure Head
  12. FM 4471 – Standard Approval for Class 1 Roof Panels
  13. ASTM D 523 - Standard Test Method for Specular Gloss
  14. ASTM D 3363 – Standard Test Method for Film Hardness by Pencil Test
  15. ASTM D 4145 - Standard Test Method for Coating Flexibility of pre-painted Sheet.
  16. ASTM D 3359 - Standard Test Methods for Measuring Adhesion by Tape Test.
  17. ASTM D 2794 - Standard Test Method for Resistance of Organic Coatings to the Effects of Rapid Deformation (Impact).
  18. ASTM D 2244 - Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates.
  19. ASTM D 4214 - Standard Test Methods for Evaluating the Degree of Chalking of Exterior Paint Films.
  20. ASTM E 84 - Standard Test Method for Surface Burning Characteristics of Building Materials.
  21. ASTM D 870 - Standard Practice for Testing Water Resistance of Coatings Using Water Immersion.
  22. ASTM D 3361 - Standard Practice for Unfiltered Open-Flame Carbon-Arc Exposures of Paint and Related Coatings.
  23. ASTM D 968, Method A - Standard Test Methods for Abrasion Resistance of Organic Coatings by Falling Abrasive.
  24. ASTM D 4212 - Standard Test Method for Viscosity by Dip-Type Viscosity.
  25. ASTM D 1475 - Standard Test Method For Density of Liquid Coatings, Inks, and Related Products.
  26. ASTM D 2697 - Standard Test Method for Volume Nonvolatile Matter in Clear or Pigmented Coatings.
  27. ASTM D 2369 - Standard Test Method for Volatile Content of Coatings.
  28. ASTM D 3960 - Standard Practice for Determining Volatile Organic Compound (VOC) Content of Paints and Related Coatings.
  29. ASTM D 3278 - Standard Test Methods for Flash Point of Liquids by Small Scale Closed-Cup Apparatus.
  30. ASTM D 5402 - Standard Practice for Assessing the Solvent Resistance of Organic Coatings Using Solvent Rubs.
  1. ROOF SYSTEM REQUIREMENTS
  2. Design Requirements:
  3. The metal roof system shall be designed by the manufacturer as a complete system. Members and connections not indicated on the drawings shall be the responsibility of the Contractor. All components of the system shall be supplied by the same manufacturer.
  4. Deflection requirements shall be in accordance with the applicable building code, or as a minimum, L/180 for roof snow load (but not less than 20 psf (98 kg/sq m)).
  5. Accessories and Fasteners: Accessories and fasteners shall be capable of resisting the specified design wind uplift forces and shall allow for thermal movement of the roof panel system. Exposed fasteners shall not restrict free movement of the roof panel system resulting from thermal forces, except at designed points of roof panel fixity.
  6. Design Loads: Design load application shall be in accordance with local building code.
  7. Dead Loads: The dead load shall be the weight of the metal roof system.

** NOTE TO SPECIFIER ** Collateral Loads consist of Sprinklers, Mechanical and Electrical Systems, and Ceilings, and shall not be attached to the roof panels.

Collateral Loads shall not be applied to the roof panels.

  1. Live Loads: The panels and concealed anchor clips shall be capable of supporting a minimum uniform live load of 20 psf (98 kg/sq m).

** NOTE TO SPECIFIER ** Snow drifting loads shall be clearly identified in the contract documents, i.e. adjacent structures, roof height changes, etc.

  1. Snow Loads: The design ground snow loads shall be as defined on the Contract Documents.
  2. Wind Loads: The design wind loads shall be based on the wind criteria defined in the Contact Documents.
  3. Thermal Effects: Roof panels shall be free to move in response to the expansion and contraction forces resulting from temperature variation, as specified in the MBMA Metal Roofing Systems Design Manual.
  1. Performance Requirements:
  2. Negative Loading: Metal roof panel systems shall be tested in accordance with ASTM E 1592-95 for negative loading. Capacity for gauge, span or loading other than those tested may be determined by interpolating between test values only.
  3. Air Infiltration: Comply with ASTM E 1680.
  4. Water Penetration: Comply with ASTM E 1646 for slopes greater than a 2/12 pitch.
  5. Water Submersion: Comply with ASTM E 2140 for slopes less than a 2/12 pitch.

** NOTE TO SPECIFIER ** Specify water penetration testing for slopes greater than a 2/12, specify water submersion for slopes less than a 2/12 roof pitch.

  1. Approval Standard for Class 1 Panel Roofs: Comply with FM 4471
  2. Temporary Concentrated Loads: The panels and concealed anchor clips shall be capable of supporting a 250-pound (113.5 kg) temporary concentrated load at the panel mid-span in the installed condition. The load shall be applied over the entire panel width. The panels shall support this concentrated load without displaying permanent distortions that would affect the weathertightness of the metal roof system.
  1. Framing Members Supporting the Metal Roof System:
  2. Any additions/revisions to framing members supporting the metal roof system to accommodate the manufacturer/fabricator's design shall be the Contractor's responsibility, and shall be submitted for review and approval by the Engineer of Record.
  3. Framing members and their connections shall be designed in accordance with AISC, AISI and LGSI design specifications applicable. Deflection requirements shall be in accordance with the applicable building code, or as a minimum, the provisions of the AISC Steel Design Guide Series 3 - Serviceability Design Considerations for Low-Rise Buildings.
  1. SUBMITTALS
  2. Submit under provisions of Section 01300.
  3. Product Data: Manufacturer's data sheets on each product to be used, including preparation recommendations, storage and handling requirements, and installation methods.
  4. Shop Drawings: Submit shop drawings showing methods of installation, elevations and plans of roof and wall panels, sections and details, specified loads, flashings, roof curbs, vents, sealants, interfaces with all materials not supplied by the metal panel system manufacturer, and proposed identification of component parts and their finishes. Do not proceed with fabrication prior to approval of shop drawings. Shop drawings shall be prepared and sealed a professional engineer licensed in the jurisdiction of the project, and include the following:
  5. Submit engineering calculations defining cladding loads for zones based on specified building codes, allowable clip loads, and required number of fasteners to secure the panel clips to the designated substructure.
  6. Compute suction loads on clip fasteners with full recognition of prying forces and eccentric clip loading.
  7. Calculate holding strength of fasteners in accordance with submitted test data provided by fastener manufacturer based on length of embedment and properties of materials.
  8. Submit thermal calculations and details of floating clip, flashing attachments, and accessories, indicating the free movement in response to the expansion/contraction effects.
  9. Roofing Snow Guard Drag Loading: The roof system manufacturer shall provide an attachment schedule signed by a licensed professional engineer and supporting calculations to resist drag loads induced by the calculated snow load.
  10. Test Reports: Submit manufacturer's test reports for each system specified.
  11. Installer Certification: Submit a letter from the manufacturer certifying the installer of the metal panel system as an authorized installer, approved by the manufacturer within the last year prior to the start of the installation of the metal panel system.

** NOTE TO SPECIFIER ** Delete selection samples if colors have already been selected.

  1. Selection Samples: For each finish product specified, two complete sets of color chips representing manufacturer's full range of available colors and patterns.
  2. Submit samples and color chips for all proposed finishes.
  3. Submit one 12-inch (305 mm) long sample of panel, including clips.
  4. Submit two 3 inch by 5 inch (76 mm by 127 mm) color chip samples of available colors for selection
  5. Verification Samples: For each finish product specified, two samples, minimum size 6 inches (150 mm) square, representing actual product, color, and patterns.
  6. Submit samples and color chips for all proposed finishes.
  7. Submit one 12 inch (305 mm) long sample of panel, including clips.
  8. Submit two 3 inches by 5 inches (76 mm by 127 mm) color chip samples in color selected.
  1. QUALITY ASSURANCE
  2. Manufacturer Qualifications: Manufacturer shall have a minimum of fiveyears’ experience in manufacturing metal roof systems.
  3. Installer Qualifications: Installer shall have completed projects of similar scope and magnitude that have been in service for a minimum of two years with satisfactory performance of the roof system. Installer's foreman shall be trained in the proper installation of the specified system, and present at all times when material is being installed.
  4. Regulatory Requirements: Comply with specified performance and local building code requirements. In the event of conflict, comply with the higher performing or more restrictive requirement.
  5. DELIVERY, STORAGE, AND HANDLING
  6. Store products in manufacturer's unopened packaging until ready for installation.
  7. Store and dispose of solvent-based materials, and materials used with solvent-based materials, in accordance with requirements of local authorities having jurisdiction.
  8. PROJECT CONDITIONS
  9. Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's absolute limits.
  10. WARRANTY
  11. Paint Finish Warranty
  12. 35 Year Limited COOLR Paint Warranty.
  13. 25 Year,6Month AZ55 Acrylic Coated Galvalume Warranty.
  1. Weathertight Warranty, Standard Warranty Program:
  2. 5 year Weathertight Warranty.
  3. 10 year Weathertight Warranty.
  4. 15 year Weathertight Warranty.
  5. 20 year Weathertight Warranty.
  6. Weathertight Warranty, Non-Dollar Limit Warranty Program:
  7. 5 year NDL Weathertight Warranty.
  8. 10 year NDL Weathertight Warranty.
  9. 15 year NDL Weathertight Warranty.
  10. 20 year NDL Weathertight Warranty.

PART 2 PRODUCTS

2.1 MANUFACTURERS

  1. Acceptable Metal Roofing Manufacturer: Sheffield Metals International5467 Evergreen Parkway Sheffield Village, OH 44054 Tel: (800) 283-5262. Fax: (440) 934-8506. Web: ". Requests for substitutions will be considered in accordance with provisions of Section 01600.
  1. STRUCTURAL STANDING SEAM ROOF SYSTEM
  2. Standing Seam Metal Roof Panel
  3. Product: SMI 2.0” MS Standing Seam metal roofing system as manufactured by Sheffield Metals International or SMI Authorized MFG.
  4. Minimum Slope: .05/12. In accordance with ASTM E 2140 or 2/12 in accordance with ASTM E 1646.
  5. Profile: Mechanical seam 180 degrees, 24 gauge, 0.023 min inch (0.61 mm) nominal thick.
  6. Concealed Finish: White or light-colored polyester backer finish.
  7. Panel Coverage: 18 inches (457 mm).
  8. Panel Height: 2 inch (51 mm) rib.
  9. Uplift Rating: ASTM E 1592.
  10. Water Penetration: ASTM E 1646.
  11. Water Submersion: ASTME 2140.
  12. Air Infiltration: ASTM E 1680.
  13. Approval Standard for Class 1 Roof Panels: FM 4471.
  14. Impact Resistance: UL 2218.
  15. Fire Resistance: UL Class A Fire Rating.
  16. Clip (Roof System Over 22GA B-Deck with 1/2 inch to 4 inches (13 mm to 102 mm) of ISO): Two piece clip with 16ga (1.2 mm) base and 22ga (0.76 mm) tab.
  17. Flashings: Provide flashings fabricated of same metal as metal roof panels.

PART 3** NOTE TO SPECIFIER ** If the minimum slope is below a 2/12 pitch specify ASTME 2140, If the slope is greater than a 2/12 specify ASTM E 1646

3.1 FABRICATION FOR SHEET METAL ROOF COMPONENTS

  1. All steel to be correctively leveled and handled to minimize stress and waviness of sheet steel.
  2. Form and fabricate sheets, seams, strips, clips, valleys, ridges, edge treatments, integral flashings, and other components of the metal roof to the profiles, patterns, and drainage arrangements as determined for installation.
  3. Fabricate exposed items of prefinished sheet metal, color to match panels.
  4. Provide for thermal expansion and contraction of the Work.
  5. Seal joints to achieve watertight construction per manufacturer's detail.
  6. Unless otherwise shown on drawings or specified herein, panels shall be full length. Fabricate flashings and accessories in longest practical lengths.

PART 4 EXECUTION

4.1 EXAMINATION

  1. Do not begin installation until substrates have been properly prepared.
  2. The Contractor shall verify installed work of other trades that such work is complete to a point where the metal panel system installation may commence.
  3. Verify that the substructure installation is in accordance with the approved shop drawings and metal panel system manufacturer's requirements.
  4. This specifically includes verifying that secondary structural members and/or decking are installed to meet performance requirements. Coordinate with metal panel system manufacturer to ensure that the substructure is installed to accommodate the appropriate clip spacing.
  5. If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.
  1. PREPARATION
  2. Clean surfaces thoroughly prior to installation.
  3. Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.

** NOTE TO SPECIFIER ** Delete if not required

  1. Roof deck substrate specified in Section 06100.
  1. INSTALLATION
  2. Install the metal panel system plumb, true and in correct alignment with support, in accordance with manufacturer's instructions and approved installation drawings.
  3. Install the metal panel system so that it is weathertight and allows for thermal movements.
  4. Locate and space all exposed fasteners in accordance with the metal panel system manufacturer's recommendations. Use proper torque settings to obtain controlled uniform compression for a positive seal without rupturing the neoprene washer.
  5. Avoid placing pipe penetrations through the panel seams.
  6. Do not allow panels or trim to come into contact with dissimilar materials (i.e. Copper, lead, graphite, treated lumber, mortar, etc.). Water run-off from these materials is also prohibited.
  7. Comply with metal panel system manufacturer's approved installation drawings, instructions and recommendations for installation of curbs. Refer to metal panel system manufacturer's standard installation details. Anchor curbs securely in place with provisions for thermal and structural movement.
  8. PROTECTION
  9. Protect installed products until completion of project.
  10. Touch-up, repair or replace damaged products before Substantial Completion.

END OF SECTION

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