07 42 13 Metal Wall Panel-1111(Nov).pdf

IDIQ ROOF MAINTENANCE/REPAIR/REPLACEMENT VNVP 111080

07 42 13 Metal Wall Panels

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November 2011

07 42 13

METAL WALL PANELS

PART 0 - INTENT:

0.1. This guide specification covers the requirements for both factory color and mill finish aluminum or steel non-structural metal wall panels.

PART 1 - GENERAL:

1.1. REFERENCES: The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN ARCHITECTURAL MANUFACTURERS ASSOCIATION (AAMA)

AAMA 501.1. (2005) Standard Test Method for Water Penetration of Windows, Curtain Walls and Doors Using Dynamic Pressure

AMERICAN IRON AND STEEL INSTITUTE (AISI)

AISI S100 (2007) North American Specification for the Design of Cold-Formed

Steel Structural Members

AISI SG03-3 (2002) Cold-Formed Steel Design Manual Set

AMERICAN SOCIETY OF CIVIL ENGINEERS (ASCE)

ASCE/SEI 7-05 (2005; R 2006) Minimum Design Loads for Buildings and Other

Structures

AMERICAN WELDING SOCIETY (AWS)

AWS A5.1/A5.1M (2004; Errata 2004) Specification for Carbon Steel Electrodes for Shielded Metal Arc Welding

AWS D1.1/D1.1M (2008; Errata 2008) Structural Welding Code - Steel

ASTM INTERNATIONAL (ASTM)

ASTM A 1008/A 1008M (2009a) Standard Specification for Steel, Sheet, Cold-

Rolled, Carbon, Structural, High-Strength Low-Alloy and High-Strength Low-

Alloy with Improved Formability, Solution Hardened, and Bake Hardened

ASTM A 123/A 123M (2009) Standard Specification for Zinc (Hot-Dip

Galvanized) Coatings on Iron and Steel Products

ASTM A 36/A 36M (2008) Standard Specification for Carbon Structural Steel

ASTM A 606/A 606M (2009a) Standard Specification for Steel Sheet and Strip, High-Strength, Low-Alloy, Hot-Rolled and Cold-Rolled, with Improved

Atmospheric Corrosion Resistance

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ASTM A 653/A 653M (2009a) Standard Specification for Steel Sheet, Zinc-Coated

(Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip

Process

ASTM A 755/A 755M (2003; R 2008) Standard Specification for Steel Sheet, Metallic Coated by The Hot-Dip Process and Prepainted by The Coil-Coating

Process for Exterior Exposed Building Products

ASTM A 780/A 780M (2009) Standard Practice for Repair of Damaged and

Uncoated Areas of Hot-Dip Galvanized Coatings

ASTM A 792/A 792M (2009a) Standard Specification for Steel Sheet, 55%

Aluminum-Zinc Alloy-Coated by the Hot-Dip Process

ASTM A 924/A 924M (2009a) Standard Specification for General Requirements for Steel Sheet, Metallic-Coated by the Hot-Dip Process

ASTM B 117 (2009) Standing Practice for Operating Salt Spray (Fog) Apparatus

ASTM C 920 (2008) Standard Specification for Elastomeric Joint Sealants

ASTM D 1056 (2007) Standard Specification for Flexible Cellular Materials -

Sponge or Expanded Rubber

ASTM D 1308 (2002; R 2007) Effect of Household Chemicals on Clear and

Pigmented Organic Finishes

ASTM D 1654 (2008) Evaluation of Painted or Coated Specimens Subjected to

Corrosive Environments

ASTM D 1667 (2005) Flexible Cellular Materials - Poly (Vinyl Chloride) Foam

(Closed-Cell)

ASTM D 2244 (2009a) Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates

ASTM D 2247 (2002) Testing Water Resistance of Coatings in 100% Relative

Humidity

ASTM D 2794 (1993; R 2004) Resistance of Organic Coatings to the Effects of

Rapid Deformation (Impact)

ASTM D 3359 (2009) Measuring Adhesion by Tape Test

ASTM D 3363 (2005) Film Hardness by Pencil Test

ASTM D 4214 (2007) Standard Test Method for Evaluating the Degree of

Chalking of Exterior Paint Films

ASTM D 4587 (2005) Standard Practice for Fluorescent UV-Condensation

Exposures of Paint and Related Coatings

ASTM D 522 (1993a; R 2008) Mandrel Bend Test of Attached Organic Coatings

ASTM D 523 (2008) Standard Test Method for Specular Gloss

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ASTM D 5894 (2005) Cyclic Salt Fog/UV Exposure of Painted Metal, (Alternating

Exposures in a Fog/Dry Cabinet and a UV/Condensation Cabinet)

ASTM D 610 (2008) Evaluating Degree of Rusting on Painted Steel Surfaces

ASTM D 714 (2002; R 2009) Evaluating Degree of Blistering of Paints

ASTM D 822 (2001; R 2006) Filtered Open-Flame Carbon-Arc Exposures of Paint and Related Coatings

ASTM D 968 (2005e1) Abrasion Resistance of Organic Coatings by Falling

Abrasive

ASTM E 1592 (2005) Structural Performance of Sheet Metal Roof and Siding

Systems by Uniform Static Air Pressure Difference

ASTM E 283 (2004) Determining the Rate of Air Leakage Through Exterior

Windows, Curtain Walls, and Doors Under Specified Pressure Differences

Across the Specimen

ASTM E 331 (2000; R 2009) Water Penetration of Exterior Windows, Skylights, Doors, and Curtain Walls by Uniform Static Air Pressure Difference

ASTM E 84 (2009c) Standard Test Method for Surface Burning Characteristics of

Building Materials

ASTM G 23 (1996) Operating Light-Exposure Apparatus (Carbon-Arc Type) With and Without Water for Exposure of Nonmetallic Materials

METAL BUILDING MANUFACTURERS ASSOCIATION (MBMA)

MBMA MBSM (2002) Metal Building Systems Manual

NATIONAL ASSOCIATION OF ARCHITECTURAL METAL MANUFACTURERS

(NAAMM)

NAAMM AMP 500 (2006) Metal Finishes Manual

SHEET METAL AND AIR CONDITIONING CONTRACTORS' NATIONAL

ASSOCIATION (SMACNA)

SMACNA 1793 (2003) Architectural Sheet Metal Manual, 6th Edition

THE SOCIETY FOR PROTECTIVE COATINGS (SSPC)

SSPC Paint 12 (1982; E 2000) Paint Specification No. 12 Cold-Applied Asphalt

Mastic (Extra Thick Film)

U.S. NAVAL FACILITIES ENGINEERING COMMAND (NAVFAC)

NAVFAC A-A-50570 (1997) Paint, Water-Borne, Acrylic or Modified Acrylic, Semigloss, For Metal Surfaces

UNDERWRITERS LABORATORIES (UL)

UL 580 (2006; R 2009) Standard for Tests for Uplift Resistance of Roof

Assemblies

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UL Bld Mat Dir (2009) Building Materials Directory

1.2. DEFINITIONS:

Metal Wall Panel: Metal wall panels, attachment system components and accessories necessary for a complete weather-tight wall system.

1.3. DESCRIPTION OF WALL PANEL SYSTEM: Factory color finished, galvalume metal wall panel system with concealed fastening attachment. Panel profile must be recessed seam lock smooth face snap lock seam box with stiffening ribs in the flat of the panel, as shown on drawings.

1.3.1. Metal Wall Panel General Performance: Comply with performance requirements, conforming to AISI S100, without failure due to defective manufacture, fabrication, installation, or other defects in construction. Wall panels and accessory components must conform to the following standards:

ASTM A 1008/A 1008M

ASTM A 123/A 123M

ASTM A 36/A 36M

ASTM A 653/A 653M

ASTM A 606/A 606M

ASTM A 755/A 755M for metallic coated steel sheet for exterior coil pre-painted applications.

ASTM A 780/A 780M for repair of damage or uncoated areas of hot-dipped galvanized coating.

ASTM A 924/A 924M for metallic coated steel sheet

ASTM D 522 for applied coatings

UL Bld Mat Dir

1.3.2. Structural Performance: Maximum calculated fiber stress must not exceed the allowable value in the AISI or AA manuals; a one third overstress for wind is allowed.

Midspan deflection under maximum design loads is limited to L/180. Contractor must provide design for members and connections not shown on the drawings. Siding panels and accessories must be the products of the same manufacturer. Provide metal wall panel assemblies complying with the load and stress requirements in accordance with

ASTM E 1592. Wind Load force due to wind action governs the design for panels. Wall systems and attachments are to resist the wind loads as determined by UL 580 and

ASCE/SEI 7-05 in the geographic area where the construction will take place, in pounds per square foot. Submit four copies of wind load tests and seismic tests to the

Contracting Officer.

1.3.3. Air Infiltration: Air leakage must conform to the limits through the wall assembly area when tested according to ASTM E 283.

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1.3.4. Water Penetration Under Static Pressure: No water penetration when tested according to ASTM E 331.

1.3.5. Water Penetration Under Dynamic Pressure: No evidence of water leakage when tested according to AAMA 501.1.

1.4. SUBMITTALS: Submit the following in accordance with Section 01 33 00

SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Submit Documentation for the following items:

Qualification of Manufacturer; G

Qualification of Installer; G

Qualification of Welders; G

Sample Warranty; G

SD-02 Shop Drawings

Installation Drawings; G

SD-03 Product Data

Submit Manufacturer's data indicating percentage of recycle material in wall panels to verify sustainable acquisition; G compliance.

Submit Manufacturer's catalog data for the following items:

Factory Color Finish

Closure Materials

Pressure Sensitive Tape

Sealants and Caulking

Galvanizing Repair Paint

Enamel Repair Paint

Aluminized Steel Repair Paint

Accessories

SD-04 Samples

Submit as required each of the following samples:

Wall Panels, 12 inches long by actual panel width; G

Fasteners; G

Metal Closure Strips, 10 inches long of each type; G

Submit manufacturer's color charts and chips, approximately 4 by 4 inches, showing full range of colors, textures and patterns available for wall panels with factory applied finishes.

SD-05 Design Data

As applicable, submit the following wind load design analysis; G data, to include, but not limited to:

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November 2011 wind speed exposure category, co-efficient, importance factor type of facility negative pressures for each zone methods and requirements of attachment

SD-06 Test Reports

Submit test reports for the following in accordance with the referenced articles in this section.

Leakage Tests; G

Wind Load Tests; G

Coatings and Base Metal Tests; G

Chalking Tests; G

Seismic Tests; G

SD-07 Certificates

Submit certificates for the following items showing conformance with referenced standards contained in this section:

Coil Stock; G

Fasteners; G

Galvanizing Repair Paint; G

Enamel Repair Paint; G

SD-08 Manufacturer's Instructions

Include detailed application instructions and standard manufacturer drawings altered as required by these specifications.

Installation of Wall panels; G

SD-11 Closeout Submittals

Warranty; G

Maintenance Instructions; G

20 year "No Dollar Limit" warranty for labor and material

1.5. QUALITY ASSURANCE:

1.5.1. Pre-Installation Conference: Upon notification of submittal receipt and approval by the Contracting Officer; and prior to the commencement of the work, the Contractor must attend a pre-installation conference to review the following:

a. Drawings and Specifications.

b. Qualification of Installer, Qualification of Welders.

c. sustainable acquisition

d. Sample Warranty

e. Sample wall panels, 12 inches long by actual panel width

f. Sample metal closure strips, 10 inches long of each type

g. Color charts and chips

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h. Coatings and base metal tests, chalking tests

i. Construction schedule, availability of materials, Installer's personnel, equipment and facilities required to progress with the work without delay.

j. Methods and procedures related to installation of wall panels, including manufacturer's written instructions. Explicitly identify in writing, differences between manufacturer's instructions and the specified requirements.

k. Support conditions for compliance with requirements, including alignment between and attachment to structural members.

l. Flashing, special siding details, wall penetrations, openings, and condition of other construction that will affect metal wall panels.

m. Governing regulations and requirements for insurance, certificates, and tests and inspections if applicable.

n. Temporary protection requirements for metal wall panel assembly during and after installation.

o. Wall panel observation and repair procedures after metal wall panel installation.

Provide detailed written instructions including copies of Material Safety Data

Sheets for maintenance and repair materials, and manufacturer's maintenance instructions.

1.5.1.1. Installation Drawings: Installation shop drawings for wall panels, flashing, accessories, and anchorage systems must indicate completely dimensioned structural frame and erection layouts, openings in the wall, special framing details, and construction details at corners, building intersections and flashing, location and type of mastic and metal filler strips.

1.5.1.2. Wind Load Design Analysis: Wind design analysis must include wall plan delineating dimensions and attachment patterns for each zone. Wind design analysis must be prepared and sealed by Licensed Project Engineer in the geographic area where the construction will take place.

1.5.2. Manufacturer's Technical Representative the representative must have authorization from manufacturer to approve field changes and be thoroughly familiar with the products and installations in the geographical area where construction will take place.

1.5.3. Qualification of Manufacturer: Certify that metal wall panel system manufacturer has a minimum of five (5) years experience in manufacturing metal wall system and accessory products. Manufacturer must also provide engineering services by an authorized engineer; currently licensed in the geographical area where construction will take place, having a minimum of four (4) years experience as an engineer knowledgeable in wind load design analysis, protocols and procedures per MBMA

MBSM, "Metal Building Systems Manual"; ASCE/SEI 7-05, and ASTM E 1592.

Provide certified engineering calculations, using the products submitted, for Wind load requirements in accordance with ASCE/SEI 7-05.

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1.5.3.1. Manufacturer's Certificates: Also provide the following certifications from the manufacturer:

Coil Stock

Fasteners

Galvanizing Repair Paint

Enamel Repair Paint

Submit certification from coil stock manufacturer or supplier that the machinery used will form the provided coil stock without warping, waviness, or rippling that is not a part of the panel profile, and without damage, abrasion or marring of the finish coating.

Provide evidence that products used within this specification are manufactured in the United States.

1.5.4. Certified Qualification of Installation Contractor: The installation contractor must be approved and certified by the metal wall panel manufacturer prior to beginning the installation of the metal wall panel system. Subcontracting by Certified Contractor for the metal wall panel work is not permitted.

1.5.4.1. Qualifications for Welding Work: Welding procedures must conform to

AWS A5.1/A5.1M, AWS D1.1/D1.1M for steel.

1.5.5. Single Source: Obtain each type of metal wall panels, clips, closure materials and other accessories from the standard products of the single source from a single manufacturer to operate as a complete system for the intended use.

1.6. DELIVERY, HANDLING, AND STORAGE: Deliver and protect package components, sheets, metal wall panels, and other manufactured items to prevent damage or deformation during transportation and handling. Unload, store, and erect metal wall panels in a manner to prevent bending, warping, twisting, and surface damage. Stack and store metal wall panels horizontally on platforms or pallets, covered with suitable weather-tight and ventilated covering to ensure dryness, with positive slope for drainage of water. Do not store metal wall panels in contact with other materials that might cause staining, denting, or other surface damage. Retain strippable protective covering on metal wall panel until actual installation.

1.7. PROJECT CONDITIONS:

1.7.1. Field Measurements: Verify locations of wall framing and opening dimensions by field measurements before metal wall panel fabrication and indicate measurements on Shop Drawings.

1.7.2. Weather Limitations: Proceed with installation preparation only when existing and forecasted weather conditions permit Work to proceed without water entering into wall system or building.

1.8. WARRANTY: Warranty must conform to the Sample Warranty as reviewed and approved by the Contracting Officer at the Pre-Installation Conference.

1.8.1. 20 Year 'No Dollar Limit Warranty for Labor and Material: system. The warranty period is to be no less than twenty (20) years from the date of Government

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November 2011 acceptance of the work. The warranty is to be issued directly to the Government. The warranty is to provide that if within the warranty period the metal wall panel system shows evidence of corrosion, perforation, rupture or excess weathering due to deterioration of the wall panel system resulting from defective materials and correction of the defective workmanship is to be the responsibility of the metal wall panel system manufacturer. Repairs that become necessary because of defective materials and workmanship while metal wall panel system is under warranty are to be performed within 24 hours after notification, unless additional time is approved by the Contracting

Officer. Failure to perform repairs within 24 hours of notification will constitute grounds for having emergency repairs performed by others and not void the warranty.

PART 2 - PRODUCTS:

2.1. FABRICATION: Fabricate and finish metal wall panels and accessories at the factory to greatest extent possible, by manufacturer's standard procedures and processes and as necessary to fulfill indicated performance requirements. Comply with indicated profiles and with dimensional and structural requirements. Provide panel profile, including major ribs and intermediate stiffening ribs, if any, for full length of panel. Fabricate metal wall panel side laps with factory-installed captive gaskets or separator strips that provide a tight seal and prevent metal-to-metal contact, in a manner that will seal weather-tight and minimize noise from movements within panel assembly.

2.1.1. Sheet Metal Accessories: Fabricate flashing and trim to comply with recommendations in SMACNA 1793 that apply to the design, dimensions, metal, and other characteristics of item indicated:

a. Form exposed sheet metal accessories that are without excessive oil canning, buckling, and tool marks and that are true to line and levels indicated, with exposed edges folded back to form hems.

b. End Seams: fabricate nonmoving end seams with flat-lock seams. Form seams and seal with epoxy seam sealer. Rivet joints for additional strength.

c. Sealed Joints: form non-expansion but movable joints in metal to accommodate elastomeric sealant to comply with SMACNA 1793.

d. Conceal fasteners and expansion provisions where possible. Exposed fasteners are not allowed on faces of accessories exposed to view.

e. Fabricate cleats and attachment devices of size and metal thickness recommended by SMACNA 1793 or by metal wall panel manufacturer for application, but not less than thickness of metal being secured.

2.2. PANEL MATERIALS:

2.2.1. Aluminum Sheet: Not Used.

2.2.2. Steel Sheet: Roll-form steel wall panels to the specified profile, with fy = 50 ksi, 24 gauge and depth as indicated. Material must be plumb and true, and within the tolerances listed:

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a. Galvanized Steel Sheet conforming to ASTM A 653/A 653M and AISI SG03-3.

b. Aluminum-Zinc Alloy-coated Steel Sheet conforming to ASTM A 792/A 792M and AISI SG03-3.

c. Individual panels must be continuous length to cover the entire length of any unbroken wall area with no joints or seams and formed without warping, waviness, or ripples that are not part of the panel profile and free of damage to the finish coating system.

d. Provide panels with thermal expansion and contraction consistent with the type of system specified.

Profile shall match profile of standing seam metal roof, i.e: (1.) (1-3/4), (2), (2-1/2) inch high standing seam, (12), (16), (18) inch coverage, with mechanical crimped seams with concealed clips and fasteners. Profile shall be approved prior to use.

Smooth, flat Surface Texture.

2.2.3. Factory Color Finish: Comply with NAAMM AMP 500 for recommendations for applying and designating finishes. Noticeable variations in same piece are not acceptable. Variations in appearance of adjoining components are acceptable if they are within the range of approved samples and are assembled or installed to minimize contrast. All panels are to receive a factory-applied Kynar 500/Hylar 5000 finish consisting of a baked-on top-coat with a manufacturer's recommended prime coat conforming to the following:

2.2.3.1. Metal Preparation: Carefully prepare all metal surface for painting on a continuous process coil coating line by alkali cleaning, hot water rinsing, application of chemical conversion coating, cold water rinsing, sealing with acid rinse, and thorough drying.

2.2.3.2. Prime Coating: Apply a base coat of epoxy paint, specifically formulated to interact with the top-coat, to the prepared surfaces by roll coating to a dry film thickness of 0.20 + 0.05 mils. Prime coat must be oven cured prior to application of finish coat.

2.2.3.3. Exterior Finish Coating: Roll coat the finish coating over the primer by roll coating to dry film thickness of 0.80 + 5 mils for a total dry film thickness of

1.00 + 0.10. mils. Oven-cure finish coat.

2.2.3.4. Interior Finish Coating: Apply a wash-coat on the reverse side over the primer by roll coating to a dry film thickness of 0.30 + 0.05 mils for a total dry film thickness of 0.50 + 0.10. mils. Oven-cured the wash coat.

2.2.3.5. Color: Provide exterior finish color as selected by the Contracting Officer from the manufacturer's standard color chart or as specified.

2.2.3.6. Physical Properties: Coating must conform to the industry and manufacturer's standard performance criteria as listed by the following certified test reports:

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General: SSPC Paint 12, NAVFAC A-A-50570, ASTM D 5894, and ASTM D 4587.

Abrasion: ASTM D 968

Adhesion: ASTM D 3359

Chalking: ASTM D 4214

Chemical Pollution: ASTM D 1308

Color Change and

Conformity:

ASTM D 2244

Creepage: ASTM D 1654

Cyclic Corrosion Test: ASTM D 5894

Flame Spread: ASTM E 84

Flexibility: ASTM D 522

Formability: ASTM D 522

Gloss at 60 and 85 degrees: ASTM D 523

Humidity: ASTM D 2247 and ASTM D 714

Oxidation: ASTM D 610

Pencil Hardness: ASTM D 3363

Reverse Impact ASTM D 2794

Salt Spray: ASTM B 117

Weatherometer: ASTM G 23 and ASTM D 822

2.3. MISCELLANEOUS METAL FRAMING: Cold-formed metallic-coated steel sheet conforming to ASTM A 653/A 653M and specified in Section 05 40 00 COLD-FORMED

METAL FRAMING unless otherwise indicated.

2.3.1. Fasteners for Miscellaneous Metal Framing: Type, material, corrosion resistance, size and sufficient length to penetrate the supporting member a minimum of 1 inch with other properties required to fasten miscellaneous metal framing members to supporting members and substrates in accordance with the wall panel manufacturer's and

ASCE/SEI 7-05 requirements.

2.4. FASTENERS:

2.4.1. General:

2.4.1.1. Exposed Fasteners: Not Used..

2.4.1.2. Hidden Fasteners: Provide corrosion resistant fasteners recommended by the manufacturer to meet the performance requirements and design loads.

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2.4.1.3. Screws: Screws to be corrosion resistant coated steel, aluminum and/or

300 - series stainless steel being the type and size recommended by the manufacturer to meet the performance requirements.

2.4.1.4. Rivets: Rivets to be closed-end type, corrosion resistant coated steel, aluminum or stainless steel where watertight connections are required.

2.4.1.5. Attachment Clips: Fabricate clips from steel hot-dipped galvanized in accordance with ASTM A 653/A 653M, Z275 G 90 or Series 300 stainless steel.

Size, shape, thickness and capacity as required meeting the insulation thickness and design load criteria specified.

2.5. ACCESSORIES:

2.5.1. General: All accessories must be compatible with the metal wall panels. Sheet metal flashing, trim, metal closure strips, caps and similar metal accessories must not be less than the minimum thickness specified for the wall panels. Exposed metal accessories/finishes to match the panels furnished, except as otherwise indicated.

Molded foam rib, ridge and other closure strips must be non-absorbent closed-cell or solid-cell synthetic rubber or pre-molded neoprene to match configuration of the panels.

2.5.2. Rubber Closure Strips: Provide closed-cell, expanded cellular rubber conforming to ASTM D 1056 and ASTM D 1667; extruded or molded to the configuration of the specified wall panel and in lengths supplied by the wall panel manufacturer.

2.5.3. Metal Closure Strips Provide factory fabricated steel closure strips to be the same gauge, color, finish and profile of the specified wall panel.

2.5.4. Joint Sealants:

2.5.4.1. Sealants and Caulking: Provide approved gun type sealants for use in hand- or air-pressure calking guns at temperatures above 40 degrees F (or frost-free application at temperatures above 10 degrees F ) with minimum solid content of 85 percent of the total volume. Sealants must dry with a tough, durable surface skin which permit remaining soft and pliable underneath, providing a weather-tight joint. No migratory staining is permitted on painted or unpainted metal, stone, glass, vinyl, or wood. Prime all joints receiving sealants with a compatible one-component or two-component primer as recommended by the wall panel manufacturer.

2.5.4.2. Shop-Applied: Sealant for shop-applied caulking must be an approved gun grade, non-sag one component polysulfide or silicone conforming to ASTM C 920, Type II, and with a curing time to ensure the sealant's plasticity at the time of field erection.

2.5.4.3. Field-Applied: Sealant for field-applied caulking must be an approved gun grade, non-sag one component polysulfide or two-component polyurethane with an initial maximum Shore A durometer hardness of 25, and conforming to ASTM C

920, Type II. Color to match panel colors.

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2.5.4.4. Pressure Sensitive Tape: Provide pressure sensitive tape sealant, 100% solid with a release paper backing; permanently elastic, non-sagging, non-toxic and non-staining as approved by the wall panel manufacturer.

2.6. SHEET METAL FLASHING AND TRIM:

2.6.1. Fabrication: Shop fabricate sheet metal flashing and trim where practicable to comply with recommendations in SMACNA 1793 that apply to design, dimensions, metal, and other characteristics of item indicated. Obtain field measurements for accurate fit before shop fabrication. Fabricate sheet metal flashing and trim without excessive oil canning, buckling, and tool marks and true to line and levels indicated, with exposed edges folded back to form hems.

2.7. REPAIR OF FINISH PROTECTION: Repair paint for color finish enameled wall panel must be compatible paint of the same formula and color as the specified finish furnished by the wall panel manufacturer. Provide 2 quarts of repair paint matching the specified wall panels.

PART 3 - EXECUTION:

3.1. EXAMINATION: Examine substrates, areas, and conditions, with Installer present, for compliance with requirements for installation tolerances, metal wall panel supports, and other conditions affecting performance of the Work. Examine primary and secondary wall framing to verify that rafters, purlins, angles, channels, and other structural panel support members and anchorages have been installed within alignment tolerances required by metal wall panel manufacturer, UL, ASTM, ASCE/SEI 7-05 and as required for the geographical area where construction will take place. Examine solid wall sheathing to verify that sheathing joints are supported by framing or blocking and that installation is within flatness tolerances required by metal wall panel manufacturer. Examine roughing-in for components and systems penetrating metal wall panels to verify actual locations of penetrations relative to seam locations of metal wall panels before metal wall panel installation. Submit to the

Contracting Officer a written report, endorsed by Installer, listing conditions detrimental to performance of the Work. Proceed with installation only after unsatisfactory conditions have been corrected.

3.2. PREPARATION: Clean substrates of substances harmful to insulation, including removing projections capable of interfering with insulation attachment. Miscellaneous framing installation, including sub-purlins, girts, angles, furring, and other miscellaneous wall panel support members and anchorage must be according to metal wall panel manufacturer's written instructions.

3.3. WALL PANEL INSTALLATION: Provide full length metal wall panels, from sill to eave as indicated, unless otherwise indicated or restricted by shipping limitations. Anchor metal wall panels and other components of the Work securely in place, with provisions for thermal and structural movement in accordance with MBMA MBSM. Erect wall panel system in accordance with the approved erection drawings, the printed instructions and safety precautions of the manufacturer. Sheets are not to be subjected to overloading, abuse, or undue impact. Bent, chipped, or defective sheets shall not be applied. Sheets must be

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November 2011 erected true and plumb and in exact alignment with the horizontal and vertical edges of the building, securely anchored, and with the indicated eave, and sill. Work is to allow for thermal movement of the wall panel, movement of the building structure, and to provide permanent freedom from noise due to wind pressure. Field cutting metal wall panels by torch is not permitted.

3.3.1. Steel Wall Panels: Use stainless-steel fasteners for exterior surfaces and galvanized steel fasteners for interior surfaces.

3.3.2. Aluminum Wall Panels: Not Used.

3.3.3. Anchor Clips: Anchor metal wall panels and other components of the Work securely in place, using manufacturer's approved fasteners according to manufacturers' written instructions.

3.3.4. Metal Protection: Where dissimilar metals will contact each other or corrosive substrates, protect against galvanic action by painting contact surfaces with bituminous coating, by applying rubberized-asphalt underlayment to each contact surface, or by other permanent separation as recommended by metal wall panel manufacturer.

3.3.5. Joint Sealers: Install gaskets, joint fillers, and sealants where indicated and where required for weatherproof performance of metal wall panel assemblies. Provide types of gaskets, fillers, and sealants indicated or, if not indicated, types recommended by metal wall panel manufacturer.

3.4. FASTENER INSTALLATION: Anchor metal wall panels and other components of the

Work securely in place, using manufacturer's approved fasteners according to manufacturers' written instructions.

3.5. FLASHING, TRIM AND CLOSURE INSTALLATION:

3.5.1. General Requirements: Comply with performance requirements, manufacturer's written installation instructions, and SMACNA 1793. Provide concealed fasteners where possible, and set units true to line and level as indicated. Install work with laps, joints, and seams to form permanently watertight and weather resistant. Install sheet metal work is to form weather-tight construction without waves, warps, buckles, fastening stresses or distortion, and allow for expansion and contraction. Cutting, fitting, drilling, and other operations in connection with sheet metal required to accommodate the work of other trades is to be performed by sheet metal mechanics.

3.5.2. Metal Flashing: Install exposed metal flashing at building corners, sills and eaves, junctions between metal siding and walling. Exposed metal flashing must be the same material, color, and finish as the specified metal wall panel. Fasten flashing at a minimum of 8 inches on center, except where flashing is held in place by the same screws that secure covering sheets. Flashing is to be furnished in at least 8 foot lengths.

Exposed flashing is to have 1 inch locked and blind-soldered end joints, and expansion joints at intervals of not more than 16 feet. Exposed flashing and flashing subject to rain penetration to be bedded in the specified joint sealant. Isolate flashing which is in contact with dissimilar metals by means of the specified asphalt mastic material to

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November 2011 prevent electrolytic deterioration. Form drips to the profile indicated, with the edge folded back 1/2 inch to form a reinforced drip edge.

3.5.3. Closures: Install metal closure strips at open ends of corrugated or ribbed pattern walls, and at intersection of wall and wall unless open ends are concealed with formed eave flashing; and in other required areas. Install mastic closure strips at intersection of the wall with metal walling; top and bottom of metal siding; heads of wall openings;

and in other required locations.

3.6. WORKMANSHIP: Make lines, arises, and angles sharp and true. Free exposed surfaces from visible wave, warp, buckle, and tool marks. Fold back exposed edges neatly to form a 1/2 inch hem on the concealed side. Make sheet metal exposed to the weather watertight with provisions for expansion and contraction. Make surfaces to receive sheet metal plumb and true, clean, even, smooth, dry, and free of defects and projections which might affect the application. For installation of items not shown in detail or not covered by specifications conform to the applicable requirements of SMACNA 1793. Provide sheet metal flashing in the angles formed where roof decks abut walls, curbs, ventilators, pipes, or other vertical surfaces and wherever indicated and necessary to make the work watertight.

3.7. ACCEPTANCE PROVISIONS:

3.7.1. Erection Tolerances: Erect metal wall panels straight and true with plumb vertical lines correctly lapped and secured in accordance with the manufacturer's written instructions.

3.7.2. Leakage Tests: Finished application of metal wall panels are to be subject to inspection and test for leakage by request of the Contracting Officer, Architect/Engineer. Conduct inspection and tests at no cost to the Government.

Inspection and testing is to be made promptly after erection to permit correction of defects and the removal and replacement of defective materials.

3.7.3. Repairs to Finish: Scratches, abrasions, and minor surface defects of finish may be repaired with the specified repair materials. Finished repaired surfaces must be uniform and free from variations of color and surface texture. Repaired metal surfaces that are not acceptable to the project requirements and/or Contracting Officer are to be immediately removed and replaced with new material.

3.7.4. Paint-Finish Metal Siding: Paint-finish metal siding will be tested for color stability by the Contracting Officer during the manufacturer's specified guarantee period. Panels that indicate color changes, fading, or surface degradation, determined by visual examination, must be removed and replaced with new panels at no expense to the

Government. New panels will be subject to the specified tests for an additional year from the date of their installation.

3.8. FIELD QUALITY CONTROL:

3.8.1. Construction Monitoring: Make visual inspections as necessary to ensure compliance with specified requirements. Additionally, verify the following:

a. Materials comply with the specified requirements.

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November 2011

b. All materials are properly stored, handled and protected from damage. Damaged materials are removed from the site.

c. Framing and substrates are in acceptable condition, in compliance with specification, prior to application of wall panels.

d. Panels are installed without buckles, ripples, or waves and in uniform alignment and modulus.

e. Side laps are formed, sealed, fastened or seam locked as required.

f. The proper number, type, and spacing of attachment clips and fasteners are installed.

g. Installer adheres to specified and detailed application parameters.

h. Associated flashing and sheet metal are installed in a timely manner in accord with the specified requirements.

Provide two bound copies of Manufacturer's Field Reports to the Contracting

Officer two weeks prior to project close-out.

3.9. CLEAN-UP AND DISPOSAL: Clean all exposed sheet metal work at completion of installation. Remove metal shavings, filings, nails, bolts, and wires from work area. Remove grease and oil films, excess sealants, handling marks, contamination from steel wool, fittings and drilling debris and scrub the work clean. Exposed metal surfaces must be free of dents, creases, waves, scratch marks, solder or weld marks, and damage to the finish coating.

Collect and place scrap/waste materials in containers. Promptly dispose of demolished materials. Do not allow demolished materials to accumulate on-site; transport demolished materials from government property and legally dispose of them.

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