2004 Master Format™ Section 07 42 16

 (Previously Section 07413)

 

Guide Specification: Metl-Span Architectural Insulated Metal Panel For Commercial & Industrial Buildings

 

PART 1 – GENERAL

1.1 SUMMARY

  1. Pre-insulated architectural metal panel cladding where indicated on the drawings.  Also included are all necessary trims, fasteners, sealants and gaskets as required for a weathertight installation.  Panels shall be secured to the structure with concealed clips and fasteners in the sidejoints.
    1. Steel faced factory foamed-in-place flat panels with integral reveals with compatible joinery.  Panels shall be designed to permit installation in either vertical or horizontal orientations.
    2. Extruded aluminum trim related to the walls and its intersection with adjacent materials.
    3. Sealants between panels and their intersection.

1.2 RELATED SECTIONS

  1. Section 07 62 00 – Sheet Metal Flashing and Trim
  2. Section 07 92 00 – Joint Sealants
  3. Section 01 81 13 – Sustainable Design Requirements - LEED: The Leadership in Energy & Environmental Design green building rating systems developed and adopted by the U.S. Green Building Council (USGBC).  The systems certify levels of environmental achievement based on a point and credit scoring system. 

1.3 REFERENCES

  1. Fire Performance
    1. FM Approval Standard 4880 – Class 1 Fire Rating of Insulated Wall, Ceiling and Roof Panels
    2. NFPA 259 – Test Method for Potential Heat of Building Materials
    3. NFPA 285 – Evaluation of Fire Propagation Characteristics of Exterior Non-Load Bearing Wall Assemblies
    4. NFPA 286 – Fire Test of Evaluating Conditions of Wall and Ceiling Finish to Roof Fire Growth
    5. ASTM E 84 – Standard Test Method for Surface Burning Characteristics of Building Materials
    6. ASTM E 119 – Fire Tests of Building Construction Materials
  2. Structural Performance
    1. FM Approval Standard 4881 – Class 1 Exterior Wall Structural Performance
    2. ASTM E 72 – Standard Test Methods of Conducting Strength Tests of Panels for Building Construction
    3. ASTM E 330 – Structural Performance of Exterior Curtain Walls by Uniform Static Air Pressure Difference
    4. ASTM E 1592 – Structural Performance of Metal Roofing and Siding Systems by Uniform Static Air Pressure Difference
    5. ASTM F 1642 – Standard Test Method for Glazing and Glazing Systems subject to Airblast Loading
    6. ASTM E 1996 – Test Method for Performance of Exterior Impact Protective Systems by Windborne Debris in Hurricanes, 15 pound
    7. GSA-TS01-2003 – Test Method for Glazing and Window Systems subject to Dynamic Overpressure Loadings
  3. Vapor Barrier Performance
    1. AAMA 501.1 – Standard Test Method for Exterior Windows, Curtain Walls and Doors for Water Penetration Using Dynamic Pressure
    2. ASTM E 283 – Standard Method for Determining the Rate of Air Leakage Through Exterior Windows, Curtain Walls and Doors Under Specified Pressure Differences Across the Specimen
    3. ASTM E 331 – Standard Test Method for Water Penetration of Exterior Windows, Skylights, Doors and Curtain Walls by Uniform Static Air Pressure Difference
  4. Thermal Performance
    1. 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. Metal Coatings
    1. ASTM E 18 – Test Methods for Rockwell Hardness of Metallic Finishes
    2. ASTM A 653 – Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) by the Hot-Dip Process
    3. ASTM A 792 – Standard Specification for Steel Sheet, Aluminum-Zinc Alloy Coated Steel by the Hot-Dip Process
    4. ASTM A 924 – General Requirements for Steel Sheet, Metallic-Coated by the Hot-Dip Process
  6. Canadian Certifications
    1. CAN/ULC S102 – Standard Method of Test for Surface Burning Characteristics of Building Materials and Assemblies
    2. CAN/ULC S101 – Fire Endurance Tests of Building Construction and Materials
    3. CAN/ULC S134 – Fire Test of Exterior Wall Assemblies
    4. CAN/ULC S138 – Fire Growth of Insulated Building Panels in a Full-Scale Room Configuration
  7. Special Approvals
    1. City of Los Angeles – Product Approval for City/County of Los Angeles
    2. Miami Dade Wall – Product Approval for City of Miami and Dade County
  8. Foam Properties
    1. ASTM D 1621 – Compressive Properties of Rigid Cellular Plastics
    2. ASTM D 1622 – Apparent Density of Rigid Cellular Plastics
    3. ASTM D 1623 – Tensile and Tensile Adhesion Properties of Rigid Cellular Plastics
    4. ASTM C 273 – Shear Properties of Sandwich Core Materials
  9. Sound Transmission
    1. AS-TL 1923A – Sound Transmission Loss Test
    2. ASTM E 90-99 – Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements
    3. ASTM E 413-87 – Classification of Rating Sound Insulation
    4. ASTM E 1332-10a – Classification for Rating Outdoor-Indoor Sound Attenuation

1.4 PERFORMANCE REQUIREMENTS

  1. Structural Tests
    1. The design load/deflection criteria shall be verified from tests per ASTM E 72 "Air Bag Method".  FM Approval Standard 4881, Standard for Class 1 Exterior Wall Systems.  Wind pressures are calculated per FM Global Property Loss Prevention Data Sheet 1-28, ratings are established and support spacing is determined based on FM Approval Standard 4881 listings.
    2. U.S. General Services Administration: Standard Test Method for Glazing and Window Systems subject to Dynamic Overpressure Loadings.  When tested in accordance with GSA-TS01-2003, achieved a GSA performance condition of 2.
    3. Large Missile Impact Test: Conducted in accordance with ASTM E 1886 Test Method for Performance of Exterior Windows, Curtain Walls, Doors and Impact Protective Systems and ASTM E 1996 Windborne Debris in Hurricanes 
  2. Thermal Performance:  Testing in accordance with ASTM C 518, “Measurement of Steady State Thermal Transmission", the panels shall provide a K-factor of .140 btu/sf/hr/deg. F at 75º F (24º C) mean temperature (air films are not included).
  3. Vapor Barrier
    1. Air Infiltration:  Air infiltration shall not exceed .06 cfm per square foot of wall area when tested per ASTM E 283 at a static pressure of 12.0 psf (.576 kPa).
    2. Static Water Penetration:  There shall be no uncontrolled water penetration through the panel joints at a static pressure of 20.0 psf (.96 kPa) when tested per ASTM E 331.
    3. Dynamic Water Penetration:  There shall be no uncontrolled water penetration through the panel joints when subjected to a 95 mph (153 kph) slipstream airflow and application of water for a 15 minute period in accordance with AAMA 501.1.
  4. Fire
    1. Surface Burning Characteristics:  The insulated core shall have been tested in accordance with ASTM E 84 and CAN/ULC S102 for surface burning characteristics.  The core shall have a maximum flame spread of 25 and a maximum smoke developed rating of 450.
    2. FM Approval Standard 4880, 50’ (15.24 m) High Corner Test for Unlimited Height Structures:  The panel assembly shall not support a self-propagating fire which reaches any of the limits of the 50’(15.24 m) high corner test structure as evidenced by flaming or material damage of the ceiling of the assembly. 
      Specifier: Approval is applicable to structures of unlimited height.
    3. National Fire Protection Association – Fire Propagation: The fire assembly meets the requirements of the standard for NFPA 285 Fire Propagation Characteristics of Exterior Non-Load Bearing Wall Assemblies and NFPA 286 Fire Test for Evaluating Contribution of Wall and Ceiling Finish to Roof Fire Growth.  Heat potential of the Metl-Span CF panel polyurethane was determined used NFPA 259 Test Method for Potential Heat of Building Materials.
    4. Canadian Certifications – Flame spread: Evaluation of fire spread over their exterior surface was conducted in accordance with CAN/ULC S134 Standard Method of Fire Test of Exterior Wall Assemblies and CAN/ULC S138 Fire Growth of Insulated Building Panels in a Full-Scale Room Configuration.  The Metl-Span CF insulated metal panel is found to be in compliance with both test methods.
    5. IBC Chapter 26: Panel performance under the above test methods, meets the requirements of IBC, Chapter on foam plastics.
  5. Special Approvals 
    1. Miami Dade County: The product has been designed to comply with the High Velocity Hurricane Zone of the Florida Building Code, have a large and small missile impact rating.  NOA number 08-0929.01.
    2. City of Los Angeles: Under General Approval for CFA Composite Foam Panels for interior and exterior non-load bearing wall and ceilings.  Research Report RR-25441.

 

1.5 SUBMITTALS

  1. Submit under provisions of Section 01 33 00.
  2. 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.
  3. Shop Drawings:  Including elevations, fastening patterns, sections of each condition and details as required.
  4. Selection Samples:  For each finish product specified, two complete sets of color chips representing manufacturer’s full range of available colors and patterns.
  5. Panel Sample:  Submit 1’ (305 mm) high joint panel sample for each profile specified indicating the metal, texture and finish.
  6. LEED Submittals:
    1. EA – Energy and Atmosphere
      1. EA Credit 1: Optimize Energy Performance
        1. Demonstrating percentage of performance improvement that meets or surpasses ASHRAE/IESNA Standard 90.1-2004.
    2. MR – Material and Resource
      1. MR Credit 4.1 & 4.2: Recycled Content
        1. Percentage weight of post-consumer and pre-consumer recycled content - use materials with recycled content.
        2. Recycled content value of product assembly and weight.
        3. Indicate total value (cost) of each product used.
    3. IEQ – Indoor Environmental Quality
      1. IEQ Credit 4.1: Low-Emitting Materials – Adhesives and Sealants
        1. Product data on adhesives and sealants to comply with standards for South Coast Air Quality Management District rule #1168.
        2. Product data for paint and coatings having no VOC's.
  7. Manufacturer's Certificates: Certify products meet or exceed specified requirements.
  8. Miami Dade County Approval: Manufacturer is accepted under the rules governing the use of construction materials for Miami-Dade County and has been designed to comply with the High Velocity Hurricane Zone of the Florida Building Code.
  9. City of Los Angeles: Complete plans and calculations signed by a licensed engineer or architect registered in the State of California for wall framing and panel attachment and submitted to the structural plan check section for approval.

1.6 QUALITY ASSURANCE

  1. Manufacturer Qualifications:  Company specializing in manufacturing factory foamed-in-place insulated metal panels with a minimum documented experience of ten (10) years.
  2. Installer Qualifications:  Company specializing in installation of the products specified for projects of similar size and scope with minimum five (5) years documented experience.

1.7 SUBSTITUTIONS

  1. Materials, accessories and testing specified shall establish the minimum level of quality, performance, dimension and appearance required of any substitution.
  2. No substitution will be considered unless a written request to the specifying architect is received for approval at least ten (10) days prior to the established bid date.  Evidence shall be submitted to demonstrate equivalency to the products and performance levels specified.  Laminated panels shall not be considered acceptable substitutes for the specified foamed-in-place panels.
    1. A complete description of the substitution including details referenced to the wall panel shown on the contract drawings.
    2. Independent test reports verifying compliance with specified performance requirements.
    3. A detailed listing of each specification item with which the substitution does not fully comply.
  3.  The manufacturer or wall panel contractor proposing the substitution shall pay the costs of any other subcontractor affected by the proposed substitution.

1.8 DELIVERY, STORAGE AND HANDLING

  1. Store products in manufacturer’s unopened packaging until ready for installation.
  2. Store products off the ground, with panels sloped for drainage and covered to protect factory finishes from damage.  Stack bundles no more than two (2) high.

1.9 WARRANTY

  1. Manufacturer’s Warranty:  Manufacturer’s two (2) year limited warranty that panels are free from defects in materials and workmanship, beginning from the date of shipment of panels, but excluding coil coatings (paint finishes) covered under a separate warranty. 
  2. The installation contractor shall issue a separate one (1) year warranty against defects in installed materials and workmanship, beginning from the date of substantial completion of the installation.
  3. Submit exterior paint manufacturer’s forty (40) year limited warranty on paint finish against cracking, peeling and blistering.  Exterior paint manufacturers twenty (20) year limited warranty on paint finish against chalk and color change. 
    Specifier: No warranty is offered for the interior painted surface of the panel.


PART 2 – PRODUCTS

2.1 MANUFACTURER

  1. Acceptable Manufacturer:  Metl-Span, LLC; 1720 Lakepointe Drive, Suite #101, Lewisville, TX  75057; Toll-Free (877) 585-9969; Fax: (972) 420-9382; E-mail: panel@metlspan.com; Web site: http://www.metlspan.com
  2. Requests for substitutions will be considered in accordance with provisions of Section 01 23 00.


2.2 PANEL DESIGN

  1. Panel – General Requirements:  Metl-Span Architectural Wall Panel - Roll-formed exterior and interior steel sheet faces chemically bonded to continuously foamed-in-place polyurethane core; laminated panels are not acceptable.
    1. Exterior Face:  G-90 galvanized stucco embossed painted steel, minimum Grade 33 and/or AZ-50 Aluminum-Zinc stucco embossed painted steel, minimum Grade 33 in 22ga (0.0296").
    2. Interior Face:  G-90 galvanized stucco embossed painted steel, minimum Grade 33 and/or AZ-50 Aluminum-Zinc stucco embossed painted steel, minimum Grade 33 in 26ga (0.0187”), 24ga (0.0236”) & 22ga (0.0296”) unless otherwise indicated.
    3. Longitudinal Joint Sealants:  Field applied.
    4. Foam Core:  Continuous foamed-in-place 92% min. closed cell, Non-CFC, Class I, Non-VOC polyurethane.
    5. Exterior Finish:  One coat 70% polyvinylidene fluoride (PVDF) coil coating, nominal 0.7 mil (0.02 mm), over 0.2 mil (0.005 mm) primer; color as selected by Architect from manufacturer's standard colors. 
    6. Interior Finish:  One coat factory applied Polyester coil coating nominal 0.7 mil (0.02 mm) in Igloo White, over 0.2 mil (0.005 mm) primer.
    7. Other Available Exposed Finishes:
      1. Metal Flake Metallic – 70% polyvinylidene fluoride (PVDF) coil coating with special metallic effect, nominal 0.5 mil (0.13 mm) thick (PVDF) fluoropolymer clear coat, over 0.9 mil (0.023 mm) PVDF fluoropolymer coil coating, over nominal 0.25 mil (0.006 mm) primer
      2. Mica Metallic – 70% polyvinylidene fluoride (PVDF) coil coating with pearlescent appearance, nominal 0.8 mil (0.02 mm) PVDF fluropolymer color coat, over nominal 0.2 mil (0.005 mm) primer.
  2. Metl-Span Architectural Wall Panel:  Concealed fastener wall panels with offset double tongue and groove joinery, providing a high performance barrier joint to maximize thermal efficiency of the continuous insulated assembly.  An extended metal shelf allowing fasteners to penetrate both metal faces with clips concealed in the side joint. 
    1. Exterior Face Profile:  Flat, stucco embossed.
    2. Interior Face Profile:  Light Mesa Wave Pattern, 1/16" deep
    3. Module Width: 24” (CF24A), 30” (CF30A), or 36” (CF36A).  Variable widths available from 24" to 36" wide.
    4. Thickness: 2”, 2.5”, 3” or 4”.
    5. Joint Reveal Options: Depth 3/8" ¼”, ½”, ¾”, 1”, 1½”, 2”, 2½”, or 3” horizontal joint reveal.
    6. Trimless ends provided at panel ends if required.
    7. Preformed Corners – Factory or field formed.
  3. Flashing and trim shall be brake-formed sheet metal in the same thickness and finish to match the panels.
  4. Manufacturer's standard extruded aluminum trim painted to match the panel is available.


PART 3 – EXECUTION

3.1 EXAMINATION

  1. Panel installer shall examine all structural steel before beginning installation to ensure that all supporting members are straight, level, plumb, properly braced and satisfactory for panel installation.
  2. Intermediate framing member (secondary structural supports) alignment tolerances required, as specified below:
    1. 0 to ¼" outward of the actual wall framing plane for members at 10' or greater spacing.
    2. 0 to 1/8" outward of the actual wall framing plane for members at 5' to 10' spacing.
    3. 0 to 1/16" outward of the actual wall framing plane for members at less than 5' spacing.
  3. For Horizontal Installation using a Running Bond or Brick Lay Pattern, use the Following Recommendations:
    1. Establish a true horizontal and vertical alignment of the wall support framing.  Framing members must be in continuous plumb throughout the installation.
    2. Verify wall framing alignment across at least 1-½ panels.
    3. Shims are often necessary to make final alignments to the finished surfaces.
    4. Panel weight is to be supported by the attachment fasteners.  Allow for at least 1/16 inch expansion/contraction movement in the joints between adjacent panels.
    5. Ensure the clip properly imbeds with the "clip shelf" that is part of the exterior male joint of the panel.
    6. Do not over tighten the fasteners.
    7. Limit the use of urethane waterproofing sealant to vertical joints only.
  4. Do not begin installation until unsatisfactory conditions are corrected.
  5. Start of installation shall signify structure and adjacent conditions as being proper and acceptable.

3.2 INSTALLATION

  1. Install in accordance with manufacturer’s instructions and recommendations including approved shop drawings, installation guidebook and manufacturer’s handbook of construction details.
  2. Install panel as indicated on drawings, accurate in size, square, and free from distortion or defects.
  3. Install flashing and trim true and in proper alignment.
  4. Install sealants where indicated to clean dry surfaces only without skips or voids, to ensure weathertightness and integrity of the vapor barrier.
  5. Conduct Pre-Installation meeting on site with Owner, Architect, Panel Installer and other trade contractors.
  6. Field cut the panels prior to installation to structural steel members.  Caution: When cutting panels, always wear protective eye shields, gloves and long sleeve clothing to protect eyes and skin from the saw chips and saw dust.

3.3 DAMAGED MATERIAL

  1. Damage caused by the manufacturer or wall panel contractor shall be replaced or repaired to as new construction.
  2. The panel installer shall inspect and approve each completed wall area and shall be responsible for protection of completed work from damage by other trades.
    Specifier: The use of touch-up paint is not recommended for minor surface scratches.  However, it is recommended to always use touch-up paint if the scratch goes through the bare metal.  When using touch-up paint, it should be limited to small areas.  Touch-up paint will never match coil-coated finishes' longevity, color and gloss.

3.4 CLEANING

  1. Replace damaged panels and other components of work, which cannot be repaired by finish touch-up or similar minor repair.
  2. Wipe finished surfaces clean of any filings caused by drilling or cutting to prevent rust staining.
  3. Protective film on trim should be removed before exposure to sunlight.