14.7. Copper Expansion Joint Cover Assemblies

SECTION 079514

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THIS SECTION USES THE TERM "ARCHITECT." CHANGE THIS TERM AS NECESSARY TO MATCH THE ACTUAL TERM USED TO IDENTIFY DESIGN PROFESSIONAL AS DEFINED IN THE GENERAL AND SUPPLEMENTARY CONDITIONS.

PART 1 - GENERAL

1.1 SUMMARY

  1. Section Includes:

    EDIT LIST BELOW TO SUIT PROJECT.

    1. Copper roof expansion assemblies.
    2. Seismic expansion assemblies.
    3. Copper expansion joint assemblies in exterior walls.
    4. Copper waterstops for exterior expansion joints.
    5. Covers for floor expansion joints.
    6. Copper gutters for under floor slab expansion assemblies.
    7. Covers for wall and ceiling expansion joints.
  2. Related Requirements: The following Sections contain requirements that relate to this Section.

    LIST BELOW ONLY PRODUCTS, CONSTRUCTION, AND EQUIPMENT FOR THIS PROJECT THAT THE READER MIGHT EXPECT TO FIND IN THIS SECTION BUT ARE SPECIFIED ELSEWHERE. VERIFY THAT THE SECTION TITLES LISTED BELOW FOR THIS PROJECT'S SPECIFICATIONS ARE CORRECT.

    1. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.
    2. Expansion joints integrated into masonry assemblies: Coordinate with masonry work in sections of Division 04.
    3. Division 06 Section "Rough Carpentry" for wood curbs for mounting roof expansion assemblies.
    4. Division 07 Section for roofing system.
    5. Section 074210 - Copper Wall Cladding.
    6. Section 076110 - Copper Roofing.
    7. Section 076210 - Copper Roofing Specialties: Roof accessory units of premanufactured, set-on type.
    8. Section 076215 - Copper Flashing and Trim: Copper assemblies associated with roofing.
    9. Section 076220 - Copper Gutters and Downspouts: Gutters and downspouts associated with roofing.

    NEXT THREE PARAGRAPHS ARE FOR INTERIOR FINISH CONSTRUCTION. EDIT TO SUIT PROJECT.

    1. Division 09 Section "Acoustical Ceilings" for ceiling assemblies.
    2. Division 09 Section "Gypsum Board" for wall assemblies.
    3. Division 09 Section "Plaster" for wall assemblies.
    4. Copper Roofing Finishes: Refer to the Division 09 Section "Painting" for requirements for priming and finishing installed copper roofing.

    DELETE PARAGRAPH ABOVE IF NO FIELD FINISHING REQUIRED.

1.2 COORDINATION

  1. Coordinate work of this section with interfacing and adjacent work for proper sequencing. Ensure weather resistance and durability of work and protection of materials and finishes.

1.3 PERFORMANCE REQUIREMENTS

  1. General:
    1. Provide roof [wall] expansion assemblies that, when installed, remain watertight within movement limitations specified.
    2. Provide wall and roof expansion joints with exterior copper expansion joint moving cover and interior elastomeric moisture barrier membrane.

DESIGN PROFESSIONAL IS RESPONSIBLE FOR DESIGNING SYSTEM, INCLUDING ANCHORAGE, FASTENER SIZE, AND SPACING.

  1. Installation Requirements: Fabricator is responsible for installing system, including anchorage to substrate and necessary modifications to meet specified and drawn requirements and maintain visual design concepts in accordance with Contract Documents and following installation methods as stipulated in the "Copper in Architecture" handbook published by the Copper Development Association Inc. (CDA).
    1. Drawings are diagrammatic and are intended to establish basic dimension of units, sight lines, and profiles of units.
    2. Make modifications only to meet field conditions and to ensure fitting of system components.
    3. Obtain Architect's approval of modifications.
    4. Provide concealed fastening wherever possible.
    5. Attachment considerations: Account for site peculiarities and expansion and contraction movements so there is no possibility of loosening, weakening and fracturing connection between units and building structure or between components themselves.
    6. Obtain Architect's approval for connections to building elements at locations other than indicated in Drawings.
    7. Accommodate building structure deflections in system connections to structure.
  2. Performance Requirements:
    1. System shall accommodate movement of components without buckling, failure of joint seals, undue stress on fasteners, or other detrimental effects when subjected to seasonal temperature changes and live loads.
    2. Design system capable of withstanding building code requirements for negative wind pressure.

1.4 SCHEDULING

  1. Schedule delivery and installation of expansion joint assemblies to prevent damage and ensure timely integration with other units of Work.

1.5 SUBMITTALS

  1. General: Submit each item in this Article according to the Conditions of the Contract and Division 01 Specifications Sections.
  2. Product data for each type of copper expansion assembly specified.
  3. Shop drawings showing fabrication and installation of copper expansion assemblies including plans, sections, details of components, anchorage details, intersections, transitions, and fittings and attachments to other units of Work

1.6 QUALITY ASSURANCE

DELETE THIS ARTICLE FOR MINOR APPLICATIONS.

  1. Installer Qualifications: Engage experienced Installer who has completed installation of copper expansion assemblies similar in material, design, and extent to that indicated for this Project and with a record of successful in-service performance.
  2. Fabricator's Qualifications: Company specializing in copper expansion joint and trim work with three years experience in similar size and type of installations.
  3. Industry Standard: Except as otherwise shown or specified, comply with applicable recommendations and details of the "Copper in Architecture" handbook published by the Copper Development Association Inc. (CDA) . Conform to dimensions and profiles shown.

1.7 DELIVERY, STORAGE, AND HANDLING

  1. Packing, Shipping, Handling, and Unloading: Protect finish metal faces.
  2. Acceptance at Site: Examine each component and accessory as delivered and confirm that material and finish is undamaged. Do not accept or install damaged materials.
  3. Storage and Protection:
    1. Stack pre-formed material to prevent twisting, bending, and abrasions.
    2. Provide ventilation.
    3. Prevent contact with materials which may cause discoloration or staining.

1.8 WARRANTY

  1. Special Warranty: Submit written warranty signed by expansion assemblies fabricator and Installer agreeing to repair or replace expansion assemblies that leak, deteriorate in excess of deterioration rates specified in manufacturer's published product literature, or otherwise fail to perform within specified warranty period.

REVISE WARRANTY TO PERIOD REQUIRED AND VERIFY AVAILABILITY.

  1. Warranty Period: 5 [___] years after date of Substantial Completion.

PART 2-PRODUCTS

2.1 MANUFACTURERS

  1. Available products: Subject to compliance with requirements, products that may be incorporated in the Work include, but are not limited to, the following:

RETAIN ABOVE FOR NONPROPRIETARY OR BELOW FOR SEMIPROPRIETARY SPECIFICATION. REFER TO DIVISION-1 SECTION "MATERIALS AND EQUIPMENT."

  1. Products: Subject to compliance with requirements, provide one of the following:
    1. Bellows Type, Metal-Flanged, Roof Expansion Joint Assemblies:
      1. Roof Bellows, Balco Inc.
      2. Expand-O-Flash, Johns Manville Corporation.

2.2 MATERIALS

  1. Copper: ASTM B3 70, temper H00 (cold-rolled) except where temper 060 is required for forming; minimum 16 oz. per sq. ft. (0.0216-inch thick) (0.55-mm thick) except as otherwise indicated.

2.3 ELASTIC SHEET, BELLOWS-TYPE ROOF EXPANSION ASSEMBLIES

DELETE TYPES OF UNITS AND MATERIALS NOT REQUIRED.

  1. General: Provide manufacturer's factory-fabricated units of sizes and types indicated, including prefabricated corner and joint-intersection units, splicing materials, adhesives, coatings, and other components as recommended by joint unit manufacturer for complete installation. Fabricate assemblies specifically for required applications (roof to roof, roof to wall, curb mounted).
  2. Metal-Flanged, Elastic Sheet, Bellows-Type Roof Expansion Assemblies: Provide assemblies consisting of exposed elastic sheet over foam bellows, securely anchored at both edges to 3- to 4-inch (75- to 100-mm) wide sheet metal nailing flanges, either flat or angle formed to fit curbs as required. Insulate bellows from below with adhesively applied, closed-cell, flexible rubber or plastic foam not less than 5/16 inch (8-mm) thick, and adhere to elastic sheet.
    1. Metal Flanges: Copper, minimum 16 oz. (0.55-mm thick).

    DELETE BELOW IF NOT REQUIRED.

    1. Mortar Flanges: Where flanges will be embedded in concrete or mortar, provide manufacturer's standard perforated mortar flanges.
  3. Type: Copper flanged edges, 3-inch to 4-inch wide, formed to profiles as indicated to fit curbs and designed for nailing to curb substrate. Provide 16 oz. copper flanges.
  4. Looped Bellows Width: Sized by manufacturer for building joint size, exclusive of flanges.

INSERT CORRECT BUILDING EXPANSION JOINT WIDTH

  1. Building Expansion Joint Size: 2 [____] inches (50 [___] mm).

2.4 SEISMIC ROOF EXPANSION JOINT SYSTEM

  1. Seismic Seals: Two single-layered elastomeric profiles, one interior and one exterior, as classified under ASTM D2000, retained in a set of copper frames.

DELETE ARTICLE ABOVE OR BELOW OR BOTH ACCORDING TO PROJECT REQUIREMENTS.

2.5 INNER SEAL

  1. Moisture Barrier: Neoprene, EPDM, or chlorosulfonated polyethylene to capture and safely drain water infiltration under roof expansion assembly covers at locations indicated.

2.6 FABRICATION

  1. General Metal Fabrication: Shop-fabricate work to greatest extent possible. Comply with details shown and with applicable requirements of the "Copper in Architecture" handbook published by the Copper Development Association Inc. (CDA) and other recognized industry practices. Fabricate for waterproof and weather-resistant performance, with provisions for building movement expansion sufficient to permanently prevent leakage, damage, or deterioration of the work. Form work to fit substrates. Comply with material fabricator ' s instructions and recommendations for forming material. Form exposed copper work without oil-canning, buckling, and tool marks, true to line and levels indicated, with exposed edges folded back to form hems.
    1. Fabricate to allow for adjustments in field for proper anchoring and joining.
    2. Form sections true to shape, accurate in size, square, free from distortion and defects.
    3. Edge Strips: Fabricate edge strips of same material as sheet, interlockable with sheet in accordance with CDA recommendations.
  2. Seams: Fabricate nonmoving seams with flat-lock seams. Tin edges and cleats to be seamed, form seams, and solder.
  3. Expansion Provisions: Where lapped or bayonet-type expansion provisions in work cannot be used or would not be sufficiently water/weatherproof, form expansion joints of intermeshing hooked flanges, not less than 1-inch (25-mm) deep, filled with mastic sealant (concealed within joints).
  4. Sealant Joints: Where movable, nonexpansion type joints are indicated or required for proper performance of work, form metal to provide for proper installation of elastomeric sealant, in compliance with CDA standards.

INSERT SPECIFIC LISTING (BELOW) OF SEPARATIONS KNOWN TO BE REQUIRED FOR WORK AS DETAILED. ATTEMPT SHOULD BE MADE IN DETAILING TO AVOID THIS NEED.

  1. Separations: Provide for separation of metal from noncompatible metal or corrosive substrates by coating concealed surfaces at locations of contact, with bituminous coating or other permanent separation as recommended by manufacturer/fabricator.
  2. Solder
    1. Solder and seal copper joints except those indicated or required to be expansive type joints.
    2. Tin edges of copper sheets and cleats at soldered joints.
    3. After soldering, neutralize acid flux by washing with baking soda solution, and then flushing with clean water rinse. Wipe and wash solder joints clean.
  3. Copper Thickness: Comply with CDA recommendations for copper thickness.
  4. Copper Expansion Joint Covers: As indicated on Drawings and in accordance with CDA "Copper in Architecture" handbook.
  5. Masonry Expansion Joint Fillers: Coordinate with Division 04 section on masonry.

2.7 ACCESSORIES:

  1. Wood Nailers: Softwood lumber, pressure treated with water-borne preservatives for above-ground use, complying with AWPB LP-2; not less than 1-1/2-inch (38-mm) thick.
  2. Solder: ASTM B 32; Provide 50-50 tin/lead or lead free alternative of similar or greater strength solder. Killed acid flux.
  3. Flux: Muriatic acid neutralized with zinc or approved brand of soldering flux.
  4. Fasteners: Same metal as flashing/sheet metal or other non-corrosive metal as recommended by sheet manufacturer. Match finish of exposed heads with material being fastened.
  5. Bituminous Coating: SSPC-Paint 12, Cold-Applied Asphalt Mastic (Extra Thick Film), nominally free of sulfur, compounded for 15-mil dry film thickness per coat.
  6. Joint Sealant: One-part, copper compatible elastomeric polyurethane, polysulfide, butyl or silicone rubber sealant as tested by sealant manufacturer for copper substrates. Refer to Division 07.
  7. Sheet Copper Accessories: Provide sheet copper edge strips, cleats, straps, anchoring devices, and similar accessory units as required for installation of work, matching or compatible with material being installed, noncorrosive, size and gauge required for performance.
  8. Roofing Cement: ASTM D 2822, asphaltic.
  9. Rivets:
    1. Pop Rivets: 1/8-inch (3-mm) to 3/16-inch (4.5-mm) diameter, with solid brass mandrels.
    2. Provide solid copper rivet (tinner's rivets) where structural integrity of seam is required.

INSERT OTHER MATERIALS AS REQUIRED FOR PROJECT.

2.8 FINISHES

  1. Natural weathering mill finished copper. No applied finish.
    ***** OR *****

REVIEW PAINT SELECTION WITH COATINGS MANUFACTURER, REFER TO DIVISION 09.

  1. To retard natural weathering, apply a uniform coating of high grade paraffin oil, or a clear lacquer coat.

CLEAR COATINGS TO RETARD WEATHERING NOT RECOMMENDED DUE TO MAINTENANCE REQUIREMENTS.

  1. Clear Lacquer Coating
    1. Clear, Organic Coating: Clear, air-drying, acrylic lacquer specially developed for coating copper alloy products, equivalent to Incralac by StanChem applied by air spray in 2 coats per manufacturer's directions, with interim drying, to total thickness of 1.0 mil.

PART 3-EXECUTION

3.1 EXAMINATION

  1. General: Examine conditions and proceed with work when substrates are ready.
  2. Confirm that substrate system is even, smooth, sound, clean, dry, and free from defects.

3.2 INSTALLATION

  1. Comply with manufacturer's instructions for handling and installing copper expansion assemblies and materials, except where more stringent requirements are indicated.
  2. Coordinate installation of copper expansion assembly materials and associated work so that complete assemblies comply with assembly performance requirements.
  3. Extend roof expansion assemblies over curbs, parapets, cornices, gutters, valleys, fascia, and other elements in the construction profile, with factory-fabricated transitions to provide continuous, uninterrupted, waterproof roof expansion assemblies.
  4. Provide uniform profile throughout length of each installation; do not stretch elastic sheets.

DELETE BELOW IF ONLY WALL UNITS OR ADHESIVELY APPLIED UNITS ARE REQUIRED.

  1. Fasten anchorage flanges securely to curbs and cant strips as recommended by manufacturer but at a maximum spacing of 6 inches (150 mm) O.C.

DELETE OR REVERSE BELOW TO MATCH PROJECT REQUIREMENTS.

  1. Anchor expansion assemblies in the manner indicated, complying with manufacturer's instructions.
  2. Expansion Joints:
    1. Anchor expansion joint units in manner indicated, complying with manufacturer's and CDA instructions. Provide counterflashing with not less than 4-inch (100-mm) overlap over roof membranes.
    2. Splice sections in accordance with manufacturer ' s instructions producing a watertight installation.
    3. Utilize shop fabricated intersections and transitions wherever possible. Field fabricate where shop fabricated sections are not possible.
    4. Maintain uniform profile.

    DELETE FOLLOWING IF BELLOWS NOT USED.

    1. Do not stretch or compress bellows.

3.3 CLEANING

  1. Remove protective film (if any) from exposed surfaces of copper promptly upon installation. Strip with care to avoid damage to finishes.
  2. Clean exposed copper surfaces, removing substances that might cause discoloration of metal.
  3. Upon completion of each area of soldering, carefully remove flux and other residue from surfaces. Neutralize acid flux by washing with baking soda solution, and then flushing clean water rinse. Use special care to neutralize and clean crevices.
  4. Clean exposed metal surfaces of substances that would interfere with normal oxidation and weathering.

3.4 PROTECTION

DELETE THIS ARTICLE FOR MINOR WORK.

  1. Provide final protection and maintain conditions in a manner acceptable to manufacturer and Installer that ensures that copper expansion assemblies are without damage or deterioration at the time of Substantial Completion.