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Metl-Span Insulated Metal Roof Panels
 
         
SECTION 07 41 43
 
         
INSULATED METAL ROOF PANELS
 
         
 
         
Copyright 2012 - 2021 ARCAT, Inc. - All rights reserved

          ** NOTE TO SPECIFIER ** Metl-Span; insulated metal roof panels.
.
This section is based on the products of Metl-Span, which is located at:
1720 Lakepointe Dr. Suite 101
Lewisville, TX 75057-6425
Toll Free Tel: 844-574-5367
Tel: 972-619-7266
Fax: 972-420-9382
Email: request info
Web: http://www.metlspan.com
[ Click Here ] for additional information.
Metl-Span is a world leader in the manufacturing of insulated metal panels for commercial, industrial, and cold storage buildings. Metl-Span is devoted to manufacturing and marketing only the finest insulated building panel products.
As a pioneer in insulated panel development for over thirty years, Metl-Span has made significant contributions to many product design innovations and technology, which are industry standards today. Metl-Span is constantly expanding their research and technological capabilities in order to develop the highest quality products possible.
 
          PART 1GENERAL
 
          1.1SECTION INCLUDES
          ** NOTE TO SPECIFIER ** Delete items below not required for project.
 
          A.Insulated metal roof panels.
 
          B.Flashing and trim integral to insulated panels.
 
          C.Clips, anchoring devices, fasteners, and accessories for installation of panel system.
 
          1.2RELATED SECTIONS
          ** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.
 
          A.Section 05 12 13 - Architecturally-Exposed Structural Steel Framing.
 
          B.Section 05 40 00 - Cold-Formed Metal Framing.
 
          C.Section 07 42 43 - Composite Wall Panels.
 
          D.Section 07 62 00 - Sheet Metal Flashing and Trim.
 
          E.Section 07 71 13 - Manufactured Copings.
 
          F.Section 07 72 13 - Manufactured Curbs.
 
          G.Section 07 90 00 - Joint Protection.
 
          H.Section 13 30 00 - Special Structures.
 
          1.3REFERENCES
          ** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.
 
          A.ASTM International (ASTM):
          1.ASTM A 653 - Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-iron Alloy Coated (Galvannealed) by the Hot-Dip Process.
          2.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.
          3.ASTM A 792 - Standard Specification for Steel Sheet, Aluminum-Zinc Alloy Coated Steel by the Hot-Dip Process.
          4.ASTM C 518 - Standard Test Method for Steady State Heat Flux Measurements and Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus
          5.ASTM C 1363 - Standard Test Method for Thermal Performance of Building Materials and Envelope Assemblies by Means of a Hot Box Apparatus.
          6.ASTM D 1621 - Compressive Properties of Rigid Cellular Plastics
          7.ASTM D 1622 - Apparent Density of Rigid Cellular Plastics
          8.ASTM D 2244 - Test Method for Calculation of Color Differences from Instrumentally Measured Color Coordinates.
          9.ASTM D 4214 - Test Methods for Evaluating Degree of Chalking of Exterior Paint Films.
          10.ASTM D 6226 - Standard Test Method for Open Cell Content of Rigid Cellular Plastics.
          11.ASTM E 72 - Standard Test Methods of Conducting Strength Tests of Panels for Building Construction.
          12.ASTM E 84 - Standard Test Method for Surface Burning Characteristics of Building Materials.
          13.ASTM E 1592 - Structural Performance of Metal Roofing and Siding Systems by Uniform Static Air Pressure Difference.
          14.ASTM E 1646 - Standard Test Method for Water Penetration of Exterior Metal Roof Panel Systems by Uniform Static Air Pressure Difference.
          15.ASTM E 1680 - Standard Test Method for Rate of Air Leakage through Exterior Metal Roof Panel Systems.
          16.ASTM E 1980 - Practice for Calculating Solar Reflectance Index of Horizontal and Low-Sloped Opaque Surfaces.
 
          B.American Society of Civil Engineers (ASCE):
          1.ASCE 7 - Minimum Design Loads for Buildings and Other Structures.
 
          C.Cool Roof Rating Council (CRRC):
          1.CRRC-1-2016 - CRRC Product Rating Program.
 
          D.FM Global (FM):
          1.ANSI/FM 4471 - Approval Standard for Class 1 Panel Roofs.
          2.FM 4880 - Evaluating Insulated Wall or Wall and Roof/Ceiling Assemblies, Plastic Interior Finish Materials, Plastic Exterior Building Panels, Wall/Ceiling Coating Systems, and Interior or Exterior Finish Systems.
 
          E.Green Seal (GS):
          1.GS-11 - Green Seal Standard for Paints and Coatings, Edition 3.2, October 26, 2015,
 
          F.US Green Building Council (USGBC):
          1.Leadership in Energy and Environmental Design (LEED) Green Building Rating System.
 
          1.4SUBMITTALS
 
          A.Submit under provisions of Section 01 30 00 - Administrative Requirements.
 
          B.Product Data: Manufacturer's data sheets on each product to be used, including:
          1.Preparation instructions and recommendations.
          2.Storage and handling requirements and recommendations.
          3.Material type, metal thickness and finish.
          4.Installation methods.
 
          C.Shop Drawings: Show layouts of metal panels. Include details of each condition of installation, panel profiles, and attachment to building. Provide details at a minimum scale 1-1/2-inch per foot of edge conditions, joints, fastener and sealant placement, flashings, openings, penetrations, and special details. Make distinctions between factory and field assembled work.
          1.Include data indicating compliance with performance requirements.
          2.Indicate points of supporting structure that must coordinate with metal panel system installation.
          3.Include structural data indicating compliance with performance requirements and requirements of local authorities having jurisdiction.
          ** NOTE TO SPECIFIER ** Delete selection samples if colors have already been selected.
 
          D.Selection Samples: For each finish product specified, two complete sets of color chips representing manufacturer's full range of available colors and patterns.
 
          E.Panel Sample: Submit 1 foot (305 mm) high by full width sample panel for each profile specified indicating the metal, texture, color and finish.
          ** NOTE TO SPECIFIER ** Delete the following paragraphs if LEED is not applicable.
 
          F.LEED Submittals: Provide documentation of how the requirements of Credit will be met:
          1.EA - Energy and Atmosphere:
          a.EA Credit 1: Optimize Energy Performance: Demonstrate percentage of performance improvement that meets or surpasses ASHRAE/IESNA Standard 90.1-2004.
          b.EA Credit 2: Minimum Energy Performance: Roof panels contribute to higher energy efficiency of a building that must comply with a 10 percent improvement in the performance compared to benchmark rating based on ASHRAE/IESNA Standard 90.1-2007 (with errata but without addenda) in EA Prerequisite 2.
          2.MR - Material and Resource:
          a.MR Credit 1.1 & 1.2: Building Reuse:
          1)Maintain Existing Walls, Floors and Roof.
          2)Maintain Interior Non-Structural Elements.
          b.MR Credit 3: Materials Reuse
          c.MR Credit 4: Recycled Content:
          1)Percentage weight of post-consumer and pre-consumer recycled content using materials with recycled content.
          2)Recycled content value of product assembly by weight.
          3)Indicate total value (cost) of each product used.
          d.MR Credit 6: Rapidly Renewable Materials: Foam core in panels using rapidly renewable buildings materials and products for 2.5 percent of the total value of all building materials and products used in the project (based on cost.)
          3.IEQ - Indoor Environmental Quality:
          a.IEQ Credit 4.1: Low-Emitting Materials, Adhesives and Sealants: Product data on adhesives and sealants to comply with standards of California Department of Public Heath v1.1-2010 and South Coast Air Quality Management District Rule 1113.
          b.IEQ Credit 4.2: Low-Emitting Materials, Paints and Coatings: Product data for paint and coatings demonstrating compliance with the VOC limits as established in Green Seal Standard GS-11.
 
          G.Buy American Act Certification: Submit documentation certifying that products comply with provisions of the Buy American Act 41 U.S.C 10a-10d.
 
          H.Manufacturer's Certificates: Certify products meet or exceed specified requirements.
 
          1.5QUALITY ASSURANCE
 
          A.Manufacturer Qualifications: Company specializing in manufacturing factory foamed in place insulated metal panels with a minimum documented experience of ten years.
 
          B.Installer Qualifications: Company specializing in installation of the products specified for projects of similar size and scope with minimum five years documented experience.
          ** NOTE TO SPECIFIER ** Delete options not required.
          1.Certified by metal panel manufacturer.
          2.Installer's Field Supervisor: Experienced mechanic certified by metal panel manufacturer supervising work on site.
          ** NOTE TO SPECIFIER ** Delete if not required.
 
          C.Buy American Compliance: Materials provided under work of this Section shall comply with the following requirements:
          1.Buy American Act of 1933 BAA-41 U.S.C. 10a-10d.
          2.Buy American provisions of Section 1605 of the American Recovery and Reinvestment Act of 2009 (ARRA).
 
          1.6DELIVERY, STORAGE, AND HANDLING
 
          A.Store products in accordance with Manufacturer's written instructions. Store under cover in manufacturer's unopened packaging with labels intact until ready for installation.
 
          B.Shield foam insulated metal roof panels from direct sunlight until installation.
 
          C.Store products off the ground, with panels sloped for drainage and covered to protect factory finishes from damage.
 
          D.Do not overload roof structure with stored materials. Do not permit material storage or traffic on completed roof surfaces.
 
          1.7WARRANTY
 
          A.Special Manufacturer's Warranty: Submit Manufacturer's two (2) year limited warranty providing panels to be free from defects in materials and workmanship, beginning from the date of substantial completion excluding coil coatings (paint finishes) that are covered under a separate warranty.
 
          B.The installation contractor shall issue a separate warranty against defects in installed materials and workmanship, beginning from the date of substantial completion of the installation.
 
          C.Special Panel Finish Warranty: Submit Manufacturer's limited warranty on the exterior paint finish for adhesion to the metal substrate and limited warranty on the exterior paint finish for chalk and fade.
          **NOTE TO SPECIFIER** Retain finish warranty paragraph corresponding to selected metal panel finish system. Coordinate chalk and fade performance with applicable Metl-Span finish and color found at www.metlspan.com. No warranty is offered for the interior painted surface of the panel. Delete options not required.
          1.Fluoropolymer Two-Coat System:
          a.Color fading in excess of 5 for copper, silver metallic and bright red; Hunter units per ASTM D 2244.
          b.Color fading in excess of 10 for copper, silver metallic and bright red; Hunter units per ASTM D 2244.
          c.Chalking in excess of 6 for copper, silver metallic and bright red or 8 rating per ASTM D 4214.
          d.Failure of adhesion, peeling, checking, or cracking.
          2.Modified Silicone-Polyester Two-Coat System:
          a.Color fading in excess of 5 for crimson red; Hunter units per ASTM D 2244.
          b.Color fading in excess of 7 for crimson red; Hunter units per ASTM D 2244.
          c.Chalking in excess of 7 for crimson red or 8 rating per ASTM D 4214.
          d.Failure of adhesion, peeling, checking, or cracking.
 
          PART 2PRODUCTS
 
          2.1MANUFACTURERS
 
          A.Acceptable Manufacturer: Metl-Span, which is located at: 1720 Lakepointe Dr. Suite 101; Lewisville, TX 75057-6425; Toll Free Tel: 844-574-5367; Tel: 972-619-7266; Fax: 972-420-9382; Email: request info; Web: http://www.metlspan.com
          ** NOTE TO SPECIFIER ** Delete one of the following two paragraphs; coordinate with requirements of Division 1 section on product options and substitutions.
 
          B.Substitutions: Not permitted.
 
          C.Requests for substitutions will be considered in accordance with provisions of Section 01 60 00 - Product Requirements.
 
          2.2PERFORMANCE REQUIREMENTS
 
          A.General: Provide metal panel system meeting performance requirements as determined by application of specified tests by a qualified testing facility on manufacturer's standard assemblies.
 
          B.Roof Panel Radiative Property Performance:
          1.Solar Reflectance Index:
          ** NOTE TO SPECIFIER ** Select first subparagraph below for LEED v3.0 and second and third subparagraph below for LEED v4.0. Delete options not required.
          a.Minimum 78 for roof slopes of 2:12 or less and 29 for roof slopes greater than 2:12 per ASTM E 1980.
          b.Minimum 82 initial SRI for roof slopes of 2:12 or less and 39 initial SRI for roof slopes greater than 2:12.
          c.Minimum 64 aged SRI for roof slopes of 2:12 or less and 32 aged SRI for roof slopes greater than 2:12.
          2.Listed on USDOE ENERGY STAR Roof Products Qualified Product List www.energystar.com.
          3.Listed in CRRC Rated Product Directory, with minimum properties as required by applicable Energy efficiency or High-Performance Green Building standard.
 
          C.Structural Performance: Provide metal panel assemblies capable of withstanding the effects of indicated loads and stresses within limits and under conditions indicated, as determined by ASTM E 72 or ASTM E 1592 applied in accordance with ICC AC 04, Section 4, Panel Load Test Option or Section 5, Panel Analysis Option:
          ** NOTE TO SPECIFIER ** Consult structural engineer and edit below as required by local codes. Insert structural data below if not indicated on drawings.
          1.Wind Loads: Determine loads based on uniform pressure, importance factor, exposure category, and basic wind speed indicated on drawings.
          a.a.Roof Panel Wind Uplift Testing: Certify capacity of metal panels by testing of proposed assembly per ASTM E 72 or ASTM E 1592.
          2.Deflection Limits: Withstand inward and outward wind-load design pressures in accordance with applicable building code with maximum deflection of 1/180 of the span with no evidence of failure.
          ** NOTE TO SPECIFIER ** Retain FM Approvals listing for FM Global-insured projects or where FM Global requirements are used. Delete options not required.
 
          D.Roof Panels FM Approvals Listing: Comply with FM Approvals 4471 as part of a panel roofing system, and that are listed in FM Approvals' "RoofNav" for Class 1 construction.
          1.Fire/Windstorm Classification: Class 1A-60.
          2.Fire/Windstorm Classification: Class 1A-75.
          3.Fire/Windstorm Classification: Class 1A-90.
          4.Fire/Windstorm Classification: Class 1A-105.
          5.Fire/Windstorm Classification: Class 1A-120.
          6.Fire/Windstorm Classification: Class 1A-135.
          7.Hail Resistance Rating: SH.
 
          E.Fire Performance Characteristics: Provide metal panel systems with the following fire-test characteristics determined by indicated test standard as applied by UL or other testing and inspection agency acceptable to authorities having jurisdiction.
          1.Surface-Burning Characteristics: Provide metal panel systems with the following characteristics when tested per ASTM E 84. The core shall have:
          a.Flame spread index: 25 or less.
          b.Smoke developed index: 450 or less.
          2.Fire Performance of Insulated Roof: Class 1 roof and wall panel per ANSI/FM 4880.
 
          F.Roof Panel Air Infiltration, ASTM E 1680: Maximum 0.023 cfm/sq. ft. (0.115 L/s per sq. m) at static-air-pressure difference of 12 lbf/sq. ft. (575 Pa).
 
          G.Roof Panel Water Penetration Static Pressure, ASTM E 1646: No uncontrolled water penetration at a static pressure of 20 lbf/sq. ft. (958 Pa).
 
          H.Test procedure for susceptibility to leakage of discontinuous roof systems protocol TAS 114: Water applied to a depth of 6" above the lowest section of roof profile. No water infiltration observed during the seven-day test period.
 
          I.Thermal Movements: Allow for thermal movements from variations in both ambient and internal temperatures. Accommodate movement of support structure caused by thermal expansion and contraction. Allow for deflection and design for thermal stresses caused by temperature differences from one side of the panel to the other.
 
          J.Thermal Performance: When tested in accordance with ASTM C 518, the panels shall provide a K-factor of 0.14 btu/sf/hr./deg F at a 75 degree F (23 degree C) mean temperature, or 0.126 btu/sf/hr/deg F at a 40 degree F (4 degree C) mean temperature.
 
          2.3INSULATED METAL ROOF PANELS
 
          A.Standing Seam, Foamed-Insulation-Core Metal Roof Panels: Structural metal panels consisting of an exterior standing seam with an interior tongue and groove joint, coupled with a vapor seal in the standing seam, and provides superior resistance to air and moisture intrusion. Attached with concealed fasteners to the structure.
          1.Basis of Design: Metl-Span, CFR Insulated Metal Panel.
          ** NOTE TO SPECIFIER ** Delete material options not required.
          2.Material: G-90 galvanized coated steel conforming to ASTM A 653 or AZ-50 aluminum-zinc alloy coated steel, conforming to ASTM A 792, minimum grade 33, prepainted by the coil-coating process per ASTM A 755.
          3.Material: Aluminum-Zinc Alloy-Coated Steel Sheet, ASTM A792, structural quality, Grade 50, Coating Class AZ50prepainted by the coil-coating process per ASTM A 755.
          ** NOTE TO SPECIFIER ** Prior to selecting metal thickness and panel thickness below, consult manufacturer's span tables and review selection against panel thickness requirements and span condition. Select appropriate panel configuration to meet requirements of design wind pressure. Important: Consult this document when specifying gauge with the intent that it meet a prescriptive decimal thickness requirement in addition to strength performance requirements. Delete options not required.
          4.Exterior Face:
          a.Thickness: 24 gauge.
          b.Thickness: 22 gauge.
          c.Surface Texture: Stucco embossed.
          ** NOTE TO SPECIFIER ** Delete finish and color options not required.
          d.Finish: Modified silicone-polyester two-coat system.
          e.Finish: Fluoropolymer two-coat system.
          f.Finish: Fluoropolymer two-coat metallic color system.
          g.Finish: Exposed Galvalume Plus coating.
          h.Color: As indicated on Drawings.
          i.Color: To be selected by Architect.
          j.Color: Match Architect's custom color.
          k.Color: ____.
          5.Interior Faces:
          a.Thickness: 26 gauge.
          b.Thickness: 24 gauge.
          c.Thickness: 22 gauge.
          d.Surface Texture: Stucco embossed with Mesa profile.
          ** NOTE TO SPECIFIER ** Delete finish and color options not required.
          e.Finish: Polyester two-coat system.
          f.Finish: Modified silicone-polyester two-coat system.
          g.Finish: Fluoropolymer two-coat system.
          h.Finish: Vinyl plastisol two-coat system.
          i.Finish: 304 Stainless Steel.
          j.Finish: 316 Stainless Steel.
          k.Color: As indicated on Drawings.
          l.Color: To be selected by Architect.
          m.Color: Match Architect's custom color.
          n.Color: ____.
          6.Endlaps: Provide panels with factory endlaps, notching, swedging and backer plates; where panel lengths permit.
          7.Low Eave Treatment: Provide cutback for trim/gutter installation; where panel lengths permit.
          ** NOTE TO SPECIFIER ** Delete panel width options not required.
          8.Panel Width: 30 inches (762 mm).
          9.Panel Width: 36 inches (914 mm).
          10.Panel Width: 42 inches (1067 mm).
          11.Panel Width: As indicated on Drawings.
          ** NOTE TO SPECIFIER ** Delete panel thickness options not required.
          12.Panel Thickness: 2 inch (51 mm).
          13.Panel Thickness: 2.5 inch (64 mm).
          14.Panel Thickness: 3 inch (76 mm).
          15.Panel Thickness: 4 inch (102 mm).
          16.Panel Thickness: 5 inch (127 mm).
          17.Panel Thickness: 6 inch (152 mm).
          18.Panel Thickness: As required to meet performance requirements.
          19.Panel Thickness: As indicated on drawings.
          20.Insulating Core: Polyurethane with zero ozone depletion potential blowing agent:
          a.Closed Cell Content, ASTM D 6226: Minimum 90 percent.
          b.Compressive Strength, ASTM D 1621: As required to meet structural performance requirements and with a minimum of 22 psi.
          c.Shear Strength, ASTM C 273: As required to meet structural performance requirements and with a minimum of 36 psi.
          d.Tensile Strength, ASTM D 1623: As required to meet structural performance requirements and with a minimum of 41 psi.
          e.Minimum Density: 2.0 pcf (32 kg/m3) as determined by ASTM D 1622.
          ** NOTE TO SPECIFIER ** Insert corresponding panel R-value if using as continuous insulation or U-factor if treating as an assembly for code compliance purposes. Delete options not required.
          f.Thermal Resistance, R-Value: ____ value as determined by ASTM C 518 at 75 degrees Fahrenheit mean temperature.
          g.Heat Transfer Coefficient U-factor: ____ as determined by ASTM C 1363 at 75 degrees Fahrenheit mean temperature. Tested specimen must include at least two engaged side joints.
 
          2.4ACCESSORIES
 
          A.General: Provide complete metal panel assemblies incorporating trim, copings, fasciae, gutters and downspouts, and miscellaneous flashings. Provide required fasteners, closure strips, and sealants as indicated in manufacturer's written instructions.
          ** NOTE TO SPECIFIER ** Delete accessories not required.
 
          B.Flashing and Trim: Match material, thickness, and finish of metal panels.
 
          C.Panel Fasteners: Self-tapping screws and other acceptable fasteners recommended by metal panel manufacturer. Provide corrosion-resistant fasteners with heads matching color of metal panels by means of factory-applied coating, with weathertight resilient washers.
 
          D.Sealant: Sealant as recommended by panel manufacturer.
 
          E.Roof Accessories: Approved by metal panel manufacturer. Refer to Section 07 72 13 - Manufactured Curbs.
 
          F.Snow Guards: Compatible with standing seam roof and approved by metal panel manufacturer. Refer to Section 07 72 13 - Manufactured Curbs.
 
          G.Roof Curbs: Compatible with standing seam roof and approved by metal panel manufacture. Refer to Section 07 72 13 - Manufactured Curbs.
 
          2.5FABRICATION
 
          A.General: Provide factory fabricated and finished metal panels, trim, and accessories meeting performance requirements, indicated profiles, and structural requirements.
 
          B.Fabricate metal panel joints configured to accept sealant tape providing weathertight seal and preventing metal-to-metal contact and minimizing noise resulting from thermal movement.
 
          C.Sheet Metal Flashing and Trim: Fabricate flashing and trim to comply with manufacturer's written instructions, approved shop drawings, and project drawings.
 
          2.6FINISHES
 
          A.Finishes, General: Prepare, pretreat, and apply coating to exposed metal surfaces to comply with coating and resin manufacturer's written instructions.
          ** NOTE TO SPECIFIER ** Delete finish options not required.
 
          B.Exterior Face Sheet Coil-Coated Finish System:
          1.Silicone-Polyester Two-Coat System: 0.20 - 0.25 mil (0.005 - 0.006 mm) primer with 0.7 - 0.8 mil (0.018 - 0.020 mm) color coat.
          ** NOTE TO SPECIFIER ** Delete if not required.
          a.Meet solar reflectance index requirements.
          b.Basis of Design: Metl-Span, Silicone Polyester.
          2.Fluoropolymer Two-Coat System: 0.20 - 0.3 mil (0.005 - 0.008 mm) primer with 0.7 - 0.8 mil (0.018 - 0.020 mm) 70 percent PVDF fluoropolymer color coat.
          ** NOTE TO SPECIFIER ** Delete if not required.
          a.Meet solar reflectance index requirements.
          b.Basis of Design: Metl-Span, Fluoropolymer.
 
          C.Interior Face Sheet Coil-Coated Finish System:
          1.Polyester Two-Coat System: 0.20 - 0.25 mil (0.005 - 0.006 mm) primer with 0.7 - 0.8 mil (0.018 - 0.020 mm) color coat.
          a.Basis of Design: Metl-Span, Igloo White.
          2.Silicone-Polyester Two-Coat System: 0.20 - 0.25 mil (0.005 - 0.006 mm) primer with 0.7 - 0.8 mil (0.018 - 0.020 mm) color coat.
          a.Basis of Design: Metl-Span, Silicone Polyester.
          3.Fluoropolymer Two-Coat System: 0.20 mil (0.005 mm) primer with 0.7 - 0.8 mil (0.018 - 0.020 mm) 70 percent PVDF fluoropolymer color coat.
          a.Basis of Design: Metl-Span, Fluoropolymer.
          4.Vinyl Plastisol Two-Coat System: 0.20 mil (0.005 mm) primer with 4 mil (0.10 mm) high solids plastisol finished with PVC technology.
          a.Basis of Design: Metl-Span, Vinyl.
          5.304 Stainless Steel: 2B 304 Stainless Steel.
          a.Basis of Design: Metl-Span, Stainless Steel.
          6.316 Stainless Steel: 2B 316 Stainless Steel.
          a.Basis of Design: Metl-Span, Stainless Steel.
 
          PART 3EXECUTION
 
          3.1EXAMINATION
 
          A.Examine metal panel system substrate with Installer present. Inspect for erection tolerances and other conditions that would adversely affect installation of metal panels.
          1.Inspect framing that will support insulated metal panels to determine if support components are installed as indicated on approved shop drawings and are within tolerances acceptable to metal panel manufacturer and installer. Confirm presence of acceptable framing members at recommended spacing to match installation requirements of metal panels.
          2.Panel Support Tolerances: Confirm that metal panel supports are within tolerances acceptable to metal panel manufacturer but not greater than the following:
          a.Maximum 1/4 inch (6 mm) in 20 foot (6100 mm) in any direction.
          b.Maximum 3/8 inch (9 mm) over any single roof plane.
          c.Purling Spacing of 7 feet (2133 mm) or less: 1/8 inch (3 mm) out only.
 
          B.Correct out-of-tolerance work and other deficient conditions prior to proceeding with insulated metal panel installation.
 
          3.2INSTALLATION
 
          A.Standing Seamed, Concealed-Fastener Insulated Metal Panels: Install metal panel system in accordance with manufacturer's written instructions, approved shop drawings, and project drawings. Install metal panels in orientation, sizes, and locations indicated. Anchor panels and other components securely in place. Provide for thermal and structural movement.
 
          B.Attach panels to metal framing using screws, fasteners, sealants, and adhesives recommended for application by metal panel manufacturer.
          1.Fasten metal panels to supports with fasteners at each location indicated on approved shop drawings, at spacing and with fasteners recommended by manufacturer.
          2.Cut panels in field where required using manufacturer's recommended methods.
          3.Provide weatherproof jacks for pipe and conduit penetrating metal panels.
          4.Dissimilar Materials: Where elements of metal panel system will come into contact with dissimilar materials, treat faces and edges in contact with dissimilar materials as recommended by metal panel manufacturer.
 
          C.Attach panel flashing trim pieces to supports using recommended fasteners and joint sealers.
 
          D.Joint Sealers: Install sealants where indicated and where required for weatherproof performance of metal panel assemblies.
          1.Seal panel base assembly, openings, panel head joints, and perimeter joints using sealants indicated in manufacturer's instructions.
          ** NOTE TO SPECIFIER ** Delete if not required.
          2.Seal wall panel joints; apply continuously without gaps in accordance with manufacturer's written instructions, approved shop drawings, and project drawings.
          3.Prepare joints and apply sealants per requirements of Division 07 Section.
 
          E.Accessories: Install metal panel accessories with positive anchorage to building and weather tight mounting; provide for thermal expansion. Coordinate installation with flashings and other components.
          1.Install components required for a complete metal panel assembly, including trim, copings, flashings, sealants, closure strips, and similar items.
          2.Comply with details of assemblies utilized to establish compliance with performance requirements and manufacturer's written installation instructions.
          3.Set units true to line and level as indicated. Install work with laps, joints, and seams that will be permanently weather resistant.
 
          3.3FIELD QUALITY CONTROL
          ** NOTE TO SPECIFIER ** Delete quality control options not required.
 
          A.Testing Agency: Owner will engage an independent testing and inspecting agency acceptable to Architect to perform field tests and inspections and to prepare test reports.
 
          B.Testing Agency: Engage an independent testing and inspecting agency acceptable to Architect to perform field tests and inspections and to prepare test reports.
 
          3.4CLEANING
 
          A.Remove temporary protective films immediately in accordance with metal panel manufacturer's instructions. Clean finished surfaces as recommended by metal panel manufacturer.
 
          3.5PROTECTION
 
          A.Protect installed products until completion of project.
 
          B.Replace damaged panels and accessories that cannot be repaired to the satisfaction of the Architect.
 
         
END OF SECTION