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- SECTION 07482
-
- ARCHITECTURAL METAL WALL CLADDING
- NOTE ** Metalwerks architectural metal wall cladding
- systems.
- NOTE **
- NOTE ** This section is based on products manufactured by
- Metalwerks Division, Metal Sales and Service, Inc.,
- which is located at the following address:
- NOTE ** P.O. Box 637
- NOTE ** Kennett Square, PA 19348
- NOTE ** Tel: (800) 321-7816
- NOTE **
- NOTE ** Metalwerks offers a complete line of ornamental
- metal cladding assemblies, including architectural
- metal wall cladding, ornamental sheet metal
- enclosures, and metal panel ceilings.
- NOTE **
- NOTE ** SECTION 07482 - ARCHITECTURAL METAL WALL CLADDING,
- Copyright 1997, The Architect's Catalog, Inc.
-
-
- PART 1 GENERAL
-
- 1.1 SECTION INCLUDES
- NOTE ** Delete items below not required for project.
-
- A. Architectural Metal Wall Cladding.
-
- B. Structural Framing for Architectural Metal Panel System.
-
- C. Associated matching sheet metal flashing and trim.
-
- 1.2 RELATED SECTIONS
- NOTE ** Delete any sections below not relevant to this
- project; add others as required.
-
- A. Section 05400 - Cold-Formed Metal Framing.
-
- B. Section 05500 - Metal Fabrications.
-
- C. Section 05735 - Ornamental Sheet Metal Enclosures.
-
- D. Section 07620 - Sheet Metal Flashing and Trim.
-
- E. Section 07900 - Joint Sealants.
-
- 1.3 REFERENCES
- NOTE ** Delete references from the list below that are not
- actually required by the text of the edited
- section.
-
- A. AAMA 605.2 - Specification for High Performance Organic
- Coatings on Architectural Extrusions and Panels.
-
- B. AISC M016 - Manual of Steel Construction - Allowable
- Stress Design.
-
- C. AISC S303 - Code of Standard Practice for Steel Buildings
- and Bridges.
-
- D. AISI SG-673 - Cold-Formed Steel Design Manual.
-
- E. ASTM A 36/A 36M - Standard Specification for Carbon
- Structural Steel.
-
- F. ASTM A 123 - Standard Specification for Zinc (Hot-Dip
- Galvanized) Coatings on Iron and Steel Products.
-
- G. ASTM A 366/A 366M - Standard Specification for Steel
- Sheet, Carbon, Cold-Rolled, Commercial Quality.
-
- H. ASTM A 653/A 653M - Standard Specification for Steel
- Sheets, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-
- Coated (Galvannealed) by the Hot-Dip Process.
-
- I. ASTM B 209 - Standard Specification for Aluminum and
- Aluminum-Alloy Sheet and Plate.
-
- J. ASTM B 209M - Standard Specification for Aluminum and
- Aluminum-Alloy Sheet and Plate (Metric).
-
- K. ASTM D 1730 - Standard Practices for Preparation of
- Aluminum and Aluminum-Alloy Surfaces for Painting.
-
- L. ASTM E 283 - Standard Test Method for Determining the
- Rate of Air Leakage Through Exterior Windows, Cirtain
- Walls, and Doors Under Specified Pressure Differences
- Across the Specimen.
-
- M. ASTM E 330 - Standard Test Method for Structural
- Performance of Exterior Windows, Curtain Walls, and Doors
- by Uniform Static Air Pressure Difference.
-
- N. ASTM E 331 - Standard Test Method for Water Penetration
- of Exterior Windows, Curtain Walls, and Doors by Uniform
- Static Air Pressure Difference.
-
- O. AWS D1.1 - Structural Welding Code - Steel.
-
- P. AWS D1.2 - Structural Welding Code - Aluminum.
-
- Q. DIN 50939 - Protection Against Corrosion; Chromating of
- Aluminum, Directives, Symbols, and Methods of Test;
- Deutsches Institut fur Normung.
-
- R. SSPC Paint 12 - Part of Steel Structures Painting Manual,
- Volume 2, Systems and Specifications.
-
- 1.4 SUBMITTALS
-
- A. Submit under provisions of Section 01300.
-
- B. Design Data: Design calculations for architectural metal
- wall cladding and its connections to structure, bearing
- seal and signature of structural engineer.
- NOTE ** Delete the following paragraph if not required for
- project.
-
- C. Test Data: Certified reports from independent testing
- agency showing compliance of a full-scale laboratory mock-
- up to performance requirements specified, including:
- 1. Air infiltration, tested in accordance with ASTM E
- 283.
- 2. Water penetration, tested in accordance with ASTM E
- 331.
- 3. Structural performance, tested in accordance with
- ASTM E 330, at 150 percent of design wind load.
-
- D. Product Data: Manufacturer's descriptive literature,
- specifications, installation instructions, and
- recommendations, for each component and finish.
-
- E. Shop Drawings: Indicate the following:
- 1. Layouts of cladding system, including project-
- specific details.
- 2. Field measurements of construction over which
- cladding will be installed, with notation of
- dimensions which vary significantly from the Contract
- Documents.
- 3. Details of edge conditions, joints, joint widths,
- corners, supports, anchorages, trim, flashings,
- closures, and perimeter conditions.
- 4. Scale: 1/2 inch to 1 foot (1:20).
- 5. Materials list; include component model numbers.
- NOTE ** Delete the following paragraph if specifying custom
- colors or finishes, or if they are specified in
- this section.
-
- F. Selection Samples: Two sets, representing manufacturer's
- full range of available materials, finishes, and colors.
-
- G. Verification Samples:
- 1. For each selected material, color, and finish, submit
- two samples, minimum size 24 inches (609 mm) square,
- representing actual material and finish.
- 2. Two samples of each type of accessory specified.
- NOTE ** Delete the following paragraph if not required;
- these samples would increase project cost.
-
- H. Samples of Fabricated Materials: Submit full-scale
- sample of panel joint showing panel edge fabrication,
- primary members, anchors, expansion provisions, and
- sealers.
-
- I. Test Report for Finish: Certified test reports from
- independent testing agency documenting conformance of
- coating to specified requirements.
-
- J. Installer's qualifications.
-
- K. Manufacturer's printed installation instructions for
- architectural metal wall cladding components; include
- component storage requirements.
-
- L. Manufacturer's written instructions for maintenance of
- materials and finishes.
-
- 1.5 QUALITY ASSURANCE
- NOTE ** Delete the following paragraph if not required.
-
- A. Designer's Qualifications: Structural engineer licensed
- to practice in the State in which the project is located.
-
- B. Manufacturer Qualifications: Minimum ten years
- documented experience producing architectural metal wall
- cladding similar to those specified in this section.
- 1. Maintaining an in-house quality assurance program.
- 2. Having sufficient capacity to produce the required
- systems within project time requirements.
-
- C. Installer Qualifications: Minimum five years documented
- experience installing architectural metal wall cladding
- similar to those specified in this section, and approved
- by manufacturer.
- NOTE ** Delete the following paragraph if not required.
-
- D. Mock-Up: Construct mock-up using materials specified in
- this section.
- 1. Construct mock-up at locations indicated or directed,
- and as follows:
- a. Size: __ feet by __ feet (__ mm by __ mm).
- b. Include panels, reveals if any, indicated
- accessories, fasteners, and anchors.
- 2. Obtain Architect's acceptance of mock-up before
- beginning construction activities of this section;
- accepted mock-up will be standard by which completed
- construction activities of this section is judged.
- NOTE ** Retain one of the following two sub-paragraphs.
- 3. Mock-up may not remain as part of work.
- 4. Accepted mock-up may remain as part of work.
- NOTE ** Delete the following paragraph if not required.
-
- E. Pre-Installation Meeting: Convene at job site seven
- calendar days prior to scheduled beginning of
- construction activities of this section to review
- requirements of this section.
- 1. Require attendance by representatives of the
- following:
- a. Installer of this section.
- b. Other entities directly affecting, or affected
- by, construction activities of this section.
- 2. Notify Architect four calendar days in advance of
- scheduled meeting date.
-
- 1.6 DELIVERY, STORAGE, AND HANDLING
-
- A. Deliver, handle, and store components in manner to
- prevent bending, warping, twisting, and surface damage.
-
- B. Deliver and store components of this section in
- manufacturer's unopened packaging until installation.
-
- C. Store components off ground/floor on skids; protect
- against warpage, scratches, damage from moisture,
- exposure to direct sunlight, and other surface
- contamination until installation.
-
- 1.7 WARRANTY
-
- A. Written warranty signed by manufacturer and installer
- warranting that architectural metal wall cladding is free
- from defective materials and installation, and is in
- conformance with Contract Documents, and further
- warranting repair or replacement of defective materials
- or installation at no additional cost, and at the
- convenience of the Owner, for five year period following
- Substantial Completion. Defective is defined to include,
- but not be limited to, the following:
- 1. Early deterioration, aging, or discoloration of
- finish, gaskets, or other components.
- 2. Uncontrolled penetration of air or water.
- 3. Failure of the system to meet performance
- requirements.
-
- B. Written warranty signed by manufacturer and installer
- warranting that finish will not develop excessive fading
- or excessive non-uniformity of color or shade, and will
- not crack, pit, peel, corrode, or otherwise fail as a
- result of defects in materials or installation, and
- further warranting repair or replacement of defective
- materials and installation at no additional cost, and at
- the convenience of the Owner, for a ten year period
- following Substantial Completion.
- 1. Excessive fading is defined to mean a change of
- appearance which is perceptible and objectionable, as
- determined by the Owner's representative when
- visually compared with the original color range
- standard.
- 2. Pit or corroding is defined as being discernible from
- a distance of 10 feet (3 m), resulting from the
- natural elements in the atmosphere at the project
- site.
-
-
- PART 2 PRODUCTS
-
- 2.1 MANUFACTURERS
-
- A. Acceptable Manufacturer: Metalwerks Division, Metal
- Sales and Service, Inc., P.O. Box 637, Kennett Square, PA
- 19348. ASD. Tel: (800) 321-7816.
- NOTE ** Delete one of the two following paragraphs;
- coordinate with Division 1 requirements.
-
- B. Requests for substitution will be considered in
- accordance with provisions of Section 01600.
-
- C. Substitutions: Not permitted.
-
- D. Provide all components specified in this section from the
- same manufacturer.
-
- 2.2 ARCHITECTURAL METAL WALL CLADDING SYSTEM
-
- A. Wall Cladding System - Performance:
- NOTE ** Insert required performance values in the blanks in
- the following paragraphs.
- 1. Air infiltration: ____ cubic feet per minute per
- square foot (___ cu m/h per sq m) at ___ pounds per
- square foot (___ kPa) pressure.
- 2. Water infiltration: ____ cubic feet per minute per
- square foot (___ cu m/h per sq m) at ___ pounds per
- square foot (___ kPa) pressure, maximum.
- NOTE ** Edit the following paragraph to suit project. 30
- psf is a relatively high design wind load.
- 3. Wind load resistance: Withstand 30 pounds per square
- foot (14 kPa), positive and negative pressure,
- overall, and 60 pounds per square foot (29 kPa),
- positive and negative pressure, at corners; without
- breakage, component disengagement, or permanent
- distortion.
- 4. Normal-to-wall deflection: Maximum 1/240 of clear
- span, or 1/4 inch (6 mm), whichever is less, at full
- design load for each panel.
- 5. Permanent deflection of members: Maximum 0.1 percent
- of clear span under 150 percent of anticipated loads,
- including windloads, direct loading, structural
- movement, structural deflection, and erection
- tolerances.
- 6. Structural movement: Accommodate anticipated
- structural movement without loss of water
- infiltration integrity, air infiltration integrity,
- oil-canning of components, or other result which
- would impair appearance or performance of metal
- cladding system.
- 7. Joints: Design for minimum shear forces on sealant
- bead and for joint sealer beads uninterrupted by
- anchors, shims, or other components.
- NOTE ** This section is based on Metalwerks Arc Wall System
- 1500, 2000, and 2500. If desired, enter the system
- number in the blank below. Otherwise, delete the
- blank. In paragraphs that follow there are choices
- that must be made between 1500, 2000, and 2500
- panel system details.
-
- B. Wall Cladding System: Metalwerks Arc Wall System _____;
- factory-fabricated aluminum panel system, complete with
- all connections, supports, and anchors, with dimensions
- based on actual field measurements and coordinated with
- adjacent work.
- NOTE ** The following drainage system applies only to
- System 2500.
- 1. Drainage: 1/2 inch (13 mm) deep internal
- drainage/furring system behind vertical and
- horizontal joints, with vertical gutters draining
- into horizontal gutters, and horizontal gutters
- draining to exterior of panel system at indicated
- locations; gutters sealed to back flange of panels
- with gaskets.
- 2. Exposed components: Fabricated from materials
- selected for surface flatness, smoothness, and
- freedom from surface blemishes.
- 3. Edges: Straight, with bending radii not less than
- minimum recommended by material supplier.
- 4. Fasteners and anchors: Concealed; exposed fasteners
- not permitted except as indicated on approved shop
- drawings.
- 5. Fabricate components as indicated on approved shop
- drawings.
-
- C. Panels: Pan-type, with formed right-angle returns and
- welded corners.
- NOTE ** Delete one of the following two paragraphs. System
- 1500 uses 1-1/2 inch deep panels, while Systems
- 2000 and 2500 use 2 inch deep panels.
- 1. Panel depth: 1-1/2 inch (38 mm).
- 2. Panel depth: 2 inches (50 mm).
- 3. Welds: Fully welded, then ground to finish matching
- adjacent non-welded surfaces.
- NOTE ** Delete one of the following two paragraphs. System
- 1500 uses 4-sided attachment; systems 2000 and 2500
- use one-sided attachment, which permits expansion
- and contraction in two directions.
- 4. Attachment flanges: For four-sided attachment, with
- opposing flanges offset for flush appearance.
- 5. Attachment flanges: Shiplap-type, for overlapping,
- weather-shedding, horizontal joint; for panel
- anchorage on one flange only.
- NOTE ** The following paragraph is for System 1500 only.
- 6. Vertical and horizontal panel joints: For exposed,
- field-applied sealant with backer rod.
- NOTE ** The following two paragraphs are for System 2000
- only.
- 7. Vertical panel joints: For dry gasket seals or
- exposed, field-applied sealant with backer rod, at
- manufacturer's option.
- 8. Horizontal panel joints: Internally sealed with
- factory-applied butyl sealant or for exposed, field-
- applied sealant with backer rod, at manufacturer's
- option.
- NOTE ** The following two paragraphs apply to System 2500
- only.
- 9. Vertical panel joints: For dry gasket seals or
- exposed, field-applied sealant with backer rod, at
- manufacturer's option.
- 10. Horizontal panel joints: Internally sealed with
- factory-applied butyl sealant.
- NOTE ** The following two paragraphs apply to Systems 2000
- and 2500, NOT to System 1500. If System 1500 is
- used, delete the following two paragraphs.
- 11. Integral flanges opposing attachment flanges: 2 inch
- by 1/2 inch (50 mm by 13 mm) channel for structural
- spanning capability and maximum panel rigidity.
- 12. Concealed hook-on cleat fastener engagement.
- 13. Curved panels: Accurately factory-formed to radii
- with no apparent seams between panel face and legs of
- panels or trim.
- 14. Fascia panels: Also provide 1/4 inch (6 mm) splice
- in vertical joints with backup plate.
- 15. Profiled panels: Where formed returns are not
- possible, use welded end caps, miters, and returns
- ground smooth prior to finishing.
- 16. Dimensions: As indicated, for joint width indicated,
- on approved shop drawings.
- 17. Panel dimensional tolerances:
- a. Panel Bow: 0.2 percent of panel dimension in
- width and length, or 0.1875 inch (4.7 mm),
- whichever is greater, maximum.
- b. Width or Length: Plus or minus 0.032 inch (0.8
- mm) for width or length dimension up to 48 inches
- (1220 mm), plus or minus 0.064 inch (1.6 mm) for
- width or length dimension 48 inches (1220 mm) to
- 144 inches (3660 mm).
- c. Thickness: Plus or minus 0.008 inch (0.19 mm).
- d. Squareness: 0.1875 inch (4.7 mm) difference
- between diagonal measurements.
- e. Camber: 0.032 inch (0.8 mm).
- NOTE ** Delete one of the following two paragraphs.
- 18. Finish: Fluoropolymer coating.
- 19. Finish: Polyester powder coating.
-
- 2.3 MATERIALS
-
- A. Panels: Aluminum sheet with strength and durability not
- less than that required for ASTM B 209/ASTM B 209M, alloy
- and temper 3003 H-14 or 5005 H-32AQ.
- 1. Sheet thickness: Minimum 0.125 inch (3.2 mm).
-
- B. Fluoropolymer Coating Finish: Polyvinylidene fluoride
- three-coat coating system, applied by coater certified by
- coating manufacturer, conforming to AAMA 605.2, and as
- follows:
- 1. Pretreatment: Chemical etch with cleaner specified
- by coating manufacturer.
- 2. Primer: Acid-resistant primer coating specified by
- coating manufacturer; dry film thickness range 0.2 to
- 0.3 mils (0.005 to 0.007 mm).
- 3. Color Coat: Containing minimum 70 percent
- polyvinylidene resin by weight; Kynar 500(R) or Hylar
- 5000(R); dry film thickness of 0.8 to 1.2 mils (0.02
- to 0.03 mm).
- 4. Top Coat: Clear top coating containing minimum 70
- percent polyvinylidene resin by weight; minimum dry
- film thickness of 0.8 mils (0.02 mm).
- NOTE ** Delete all but one of the following three
- paragraphs to specify color; coordinate selection
- method with requirements for Samples in SUBMITTALS
- Article of Part 1.
- 5. Color: _________________.
- 6. Color: Selected from full range of coating
- manufacturer's standard colors.
- 7. Color: Match Architect's sample.
-
- C. Polyester Powder Coating Finish: Manufacturer's standard
- electrostatically-applied or spray-applied polyester
- powder coating system as follows:
- 1. Multi-stage pretreatment process in accordance with
- ASTM D 1730, Type B, method 5 or 7, and DIN 50939.
- 2. Finish coat: One coat commercial-grade polyester
- powder coating.
- NOTE ** Delete the following paragraph if specifying single
- coat only.
- 3. Second finish coat: Additional coat commercial-grade
- polyester powder coating.
- 4. Total coating thickness: 2.5 to 3.5 mils (0.06 to
- 0.08 mm) dry film thickness on panel face; 3.5 to 5
- mils (0.08 to 0.12 mm) dry film thickness on panel
- edges and corners.
- NOTE ** Delete all but one of the following three
- paragraphs to specify color; coordinate selection
- method with requirements for Samples in SUBMITTALS
- Article of Part 1.
- 5. Color: _________________.
- 6. Color: Selected from full range of manufacturer's
- standard colors.
- 7. Color: Match Architect's sample.
-
- D. Panel Accessories: Same material, sheet thickness, and
- finish as adjacent panels, unless otherwise indicated;
- including ceiling/soffit panels, fascia panels, reveals,
- ceiling closures, and joint sealer recesses.
-
- E. Clips, Stiffeners, and Retainers: Formed or extruded
- stainless steel or aluminum, designed for concealed
- installation and specified performance criteria.
- 1. Screws: AISI type 305 stainless steel, self-
- tapping, with aluminum washers and rubber grommets;
- self-drilling fasteners not permitted.
- 2. Bolts, nuts, and washers: AISI type 305 stainless
- steel.
-
- F. Studs, Purlins, and Sub-Girts: Channel sections roll-
- formed of galvanized steel sheet conforming to ASTM A
- 653/A 653M SQ, with hot-dip G90/Z275 zinc coating,
- minimum 16 gage (1.6 mm); minimum 3/4 inch (19 mm) depth;
- sizes as indicated and as required to allow for
- adjustment.
-
- G. Steel Angles, Plates, Bars, Rods, and Accessories:
- Structural steel shapes conforming to ASTM A 36/A 36M, or
- formed steel sheet conforming to ASTM A 366/A 366M; hot-
- dip galvanized after fabrication in accordance with ASTM
- A 123, G90 coating, or coated after fabrication with
- epoxy paint, minimum of 0.0785 inch (2 mm) thick.
-
- H. Accessory Materials: Provide concealed gaskets, fillers,
- insulation, and other materials as required to complete
- the installation.
-
- I. Concealed Gaskets: Vinyl or rubber.
-
- J. Sheet Metal Flashing and Trim Associated with Cladding
- System: Same material and finish as panels, and as
- specified in Section 07620.
-
- K. Joint Sealants: As specified in Section 07900, and as
- recommended by panel manufacturer.
-
- L. Thermal Insulation: As specified in Section 07210.
-
- M. Bituminous Paint: Cold-applied asphalt mastic, SSPC
- Paint 12, formulated for 15 mil (0.3 mm) dry film
- thickness per coat.
-
- 2.4 FABRICATION
-
- A. Welding:
- 1. Use electrodes and methods recommended by
- manufacturer of material being welded, and in
- accordance with applicable AWS standards.
- 2. Use only methods which prevent distortion and
- discoloration of exposed faces.
- 3. Grind weld areas smooth, using only clean equipment
- and materials free of iron or iron compounds.
- 4. Restore finish of welded areas component parts to
- finish matching adjacent non-welded surfaces after
- welding and grinding.
-
- B. Complete forming and welding of panels before applying
- specified finish.
-
- C. Shop Coating: If galvanizing on framing members is not
- compatible with alloy of component parts, apply shop coat
- of epoxy paint, minimum coating thickness 0.0785 inches
- (1.99 mm), after cutting members to size.
-
- D. Apply protective masking to surfaces which will be
- exposed in finished work; ensure that masking materials,
- including adhesive, will not adversely affect appearance
- of components.
-
-
- PART 3 EXECUTION
-
- 3.1 EXAMINATION
-
- A. Verify the following:
- 1. Dimensions of locations to receive architectural
- metal wall cladding are in accordance with approved
- shop drawings.
- 2. Substrates to receive architectural metal wall
- cladding are prepared for installation of metal wall
- cladding.
- 3. Substrates are within tolerances to allow plane
- tolerances specified in this section.
-
- B. Examine areas and conditions under which work is to be
- performed. Do not start work until unsatisfactory
- conditions have been corrected.
-
- 3.2 INSTALLATION
-
- A. Install components in accordance with approved shop
- drawings.
-
- B. Concealed Supports and Fastening Systems: Install in
- accordance with referenced AISC publications. Perform
- welding as specified for fabrication.
-
- C. Panels: Install to specified tolerances, with hairline
- joints between adjacent components.
- 1. Field cutting of panels not permitted.
- 2. Do not install panels that are bowed, warped, or
- otherwise damaged or impaired in appearance.
-
- D. Anchor with concealed fasteners; provide separators to
- prevent freeze-up of moving joints, corrosion, and
- electrolytic action.
-
- E. Protect metal surfaces from corrosion and electrolytic
- action by applying two coats bituminous paint on surfaces
- which will be in contact with concrete, masonry, or
- dissimilar metals; secure fastening systems to substrates
- using anchors specified in approved shop drawings.
-
- F. Accessories:
- 1. Install to achieve weathertight assembly as
- construction activities progress.
- 2. Tool sealants to concave profile, cleaning excess
- sealant materials from panel surfaces in the process.
-
- G. Installation Tolerances:
- 1. Maximum variation from plumb, plane, level, slope, or
- location in plan: 1/4 inch in 20 feet (5 mm in 5 m),
- non-cumulative.
- 2. Maximum variation in horizontal and vertical joint
- alignment: Plus or minus 1/16 inch (1.5 mm).
-
- 3.3 CLEANING
-
- A. After removing factory-applied masking, clean surfaces
- using materials and methods specified in manufacturer's
- instructions.
-
- 3.4 PROTECTION
-
- A. Protect installed components from damage to finish or
- function by subsequent construction activities; do not
- remove factory-applied masking from components until time
- of Substantial Completion.
-
- B. Repair damaged components and finishes, if any, in
- accordance with manufacturer's recommendations; replace
- components which cannot be repaired to Architect's
- acceptance.
-
- END OF SECTION
-