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- SECTION 07623
-
- SHEET STAINLESS STEEL FLASHING
- NOTE ** This section includes stainless steel flashing and
- trim custom-fabricated from stainless steel sheet
- or TCS sheet. Examples of flashing and trim items
- covered in this section include built-in valleys,
- scuppers, gutters and downspouts, etc.
-
- NOTE ** Information in this section is provided by the
- Specialty Steel Industry of the United States
- (SSIUS) which is a source of technical data on
- stainless steel. SSIUS has the capabilities for
- providing seminars, technical publications and can
- help facilitate design assistance on the use of
- stainless steel products for architectural and
- engineering applications. For additional
- information, contact SSIUS at:
- NOTE **
- NOTE ** Specialty Steel Industry of the United States
- NOTE ** 3050 K Street, NW
- NOTE ** Washington, DC 20007
- NOTE ** Tel: (202) 342-8630
- NOTE ** Fax: (202) 342-8451
- NOTE **
- NOTE ** SECTION 07613 - SHEET STAINLESS STEEL ROOFING,
- Copyright 1998, The Architect's Catalog, Inc.
-
- NOTE ** Disclaimer: The Specialty Steel Industry of the
- United States (SSIUS) and the individual companies
- it represents have made every effort to ensure that
- the information presented in this specification is
- technically correct. However, neither the SSIUS
- nor its member companies warrants the accuracy of
- the information contained in this specification or
- its suitability for any general and specific use,
- the SSIUS assumes no liability or responsibility of
- any kind in connection with the use of this
- information. The reader is advised that the
- material contained herein should not be used or
- relied on for any specific or general applications
- without first securing competent advice.
-
- PART 1 GENERAL
-
- 1.1 SECTION INCLUDES
-
- A. Shop- and field-fabricated stainless steel flashing and
- trim, including:
- NOTE ** Delete items below not required for project.
- 1. Counterflashing and base flashing.
- 2. Wall flashing and expansion joints.
- 3. Built-in valleys, gutters, and scuppers.
- 4. Gutters and downspouts.
- 5. Exposed trim/fascia units.
- 6. Miscellaneous accessories.
-
- 1.2 RELATED SECTIONS
- NOTE ** Delete any sections below not relevant to this
- project; add others as required.
-
- A. Section 04810 - Unit Masonry Assemblies: Stainless steel
- flashings embedded in masonry.
-
- B. Section 05810 - Expansion Joint Cover Assemblies:
- Stainless steel expansion joint covers.
-
- C. Section 07411 - Stainless Steel Roof Panels.
-
- D. Section 07613 - Sheet Stainless Steel Roofing.
-
- E. Section 07723 - Manufactured Stainless Steel Roof
- Specialties: Roof specialties and accessories units of
- manufactured type.
-
- F. Section 07900 - Joint Sealers.
-
- 1.3 REFERENCES
- NOTE ** Delete references from the list below that are not
- actually required by the text of the edited
- section.
-
- A. ASTM A 240/A 240M - Standard Specification for Heat
- Resisting Chromium and Chromium-Nickel Steel Plate,
- Sheet, and Strip for Pressure Vessels.
-
- B. ASTM A 308 - Standard Specification for Sheet, Terne
- (Lead-Tin Alloy) Coated by the Hot-Dip Process.
-
- C. SSIUS - Designer Handbook Series; Specialty Steel
- Industry of the United States (SSIUS).
- 1. Stainless Steel for Roofing, Flashings, Copings.
- 2. Design Guidelines for the Selection and Use of
- Stainless Steel.
- 3. Specifications for Stainless Steel.
- 4. Stainless Steel Fabrication.
- 5. Stainless Steel FastenersCA Systematic Approach to
- Their Selection.
- 6. Finishes for Stainless Steel.
- 7. Stainless Steel Architectural Facts.
-
- D. SMACNA - Architectural Sheet Metal Manual; Sheet Metal
- and Air Conditioning Contractors National Association,
- Inc.; fifth edition, 1993.
-
- 1.4 SUBMITTALS
-
- A. Submit in accordance with Section 01300.
-
- B. Product Data: Submit manufacturer's technical product
- data, installation instructions and general
- recommendations for each specified sheet material and
- fabricated product.
-
- C. Samples: 12 inch square samples of specified sheet
- materials to be exposed as finished surfaces.
-
- D. Samples: 12 inch long samples of factory-fabricated
- products exposed as finished work, including specified
- factory finish.
-
- E. Shop Drawings: Submit layout, profiles, methods of
- joining, and anchorage details, including major
- counterflashings, trim/fascia units, gutters, downspouts,
- scuppers, and expansion joint systems. Provide layouts
- at 1/4 inch scale and details at 3 inch scale.
-
- 1.5 QUALITY ASSURANCE
-
- A. Installer Qualifications: A firm with 5 years of
- successful experience with installation of stainless
- steel flashing and trim similar in type and scope to
- project requirements.
-
-
- PART 2 PRODUCTS
-
- 2.1 FLASHING AND TRIM MATERIALS
- NOTE ** Select one of the following stainless steel types
- below: either uncoated stainless steel or terne-
- coated stainless steel.
-
- A. Stainless Steel Sheet: ASTM A 240/A 240M, Type 304,
- fully annealed, dead soft temper.
- NOTE ** Delete all but one of the following thickness
- descriptions. Verify suitability and availability
- with roofing sheet manufacturer.
- 1. Thickness: 0.015 inch, 28 gauge, unless otherwise
- indicated.
- 2. Thickness: 0.018 inch, 26 gauge, unless otherwise
- indicated.
- 3. Thickness: 0.021 inch, 25 gauge, unless otherwise
- indicated.
- 4. Thickness: As indicated on drawings.
- NOTE ** Select finish below after consultation with
- material producer and roofing manufacturer; verify
- appropriate finish for project requirements. Other
- finishes are available.
- 5. Finish: No.2D (dull) mill rolled sheet finish.
- 6. Finish: ________.
- 7. Finish: As selected by Architect from roofing
- manufacturer's standards.
-
- B. Stainless Steel Sheet: Terne-coated stainless steel
- sheet, complying with ASTM A 308, Type 304, fully
- annealed, dead soft temper.
- 1. Coating: Coat both sides of stainless steel sheet
- with terne alloy (80-20 lead/tin) in accordance with
- sheet metal manufacturer's standard nominal coating
- weight.
- NOTE ** Delete all but one of the following thickness
- descriptions. Verify suitability and availability
- with roofing sheet manufacturer.
- 2. Base Metal Thickness: 0.015 inch, 28 gauge, unless
- otherwise indicated.
- 3. Base Metal Thickness: 0.018 inch, 26 gauge, unless
- otherwise indicated.
- 4. Base Metal Thickness: 0.021 inch, 25 gauge, unless
- otherwise indicated.
- 5. Base Metal Thickness: As indicated on drawings.
- 6. Finish: Manufacturer's standard.
-
- C. Solder: Minimum 50-50 tin/lead solder for unexposed
- joints; minimum 80-20 tin/lead solder for color match at
- exposed joints. Use only phosphoric acid based flux for
- soldering stainless steel.
-
- D. Fasteners: Stainless steel, type 300 series, as
- recommended by sheet manufacturer.
-
- E. Metal Accessories: Stainless steel clips, straps,
- anchoring devices, and similar accessory units as
- required for installation of work, non-corrosive, size
- and gage required for performance.
-
- F. Bituminous Coating: SSPC-Paint 12, solvent-type
- bituminous mastic, nominally free of sulfur, compounded
- for 15 mil dry film thickness per coat except as
- otherwise indicated; inert-type non-corrosive compound,
- nominally free of sulfur components and other deleterious
- impurities.
-
- G. Mastic Sealant: Polyisobutylene; non-hardening, non-
- skinning, non-drying, non-migrating sealant.
-
- H. Elastomeric Sealant: Type recommended for components
- being sealed and complying with requirements for joint
- sealants as specified in Section 07900 - Joint Sealers.
-
- I. Epoxy Seam Sealer: 2-part non-corrosive metal seam
- cementing compound, recommended by sealant manufacturer
- for exterior/interior non-moving joints including riveted
- joints.
-
- J. Adhesives: Type recommended for waterproof and weather
- resistant seaming and adhesive application indicated by
- manufacturer of stainless steel.
-
- 2.2 ACCESSORY MATERIALS
- NOTE ** Delete any of the following accessory items that
- are not required for the project.
-
- A. Roofing Felt: Asphalt or coal tar saturated felt
- weighing not less than 30 lb per 100 square feet.
-
- B. Slip Sheet: 4-lb rosin-sized building paper.
-
- C. Elastic Expansion Joints: Factory-fabricated units of
- size and profile indicated, with elastic sheet flashing
- forming the primary joint membrane in a supported bellows
- arrangement designed to be secured to both sides of
- expansion joints; underside of bellows insulated with
- adhesive applied, flexible, closed-cell rubber or plastic
- not less than 3/8 inch thick.
- NOTE ** Delete one of the following two paragraphs.
- 1. Type: Plain sheet or encapsulated stainless steel
- flanged edges, for embedment in other construction or
- nailing to substrates, 4 inches minimum flange width.
- 2. Type: Stainless steel flanged edges, 3 to 4 inches
- wide, formed to profiles as indicated to fit curbs
- and designed for nailing to curb substrate. Provide
- thickness as indicated and in accordance with
- manufacturer=s standards and recommendations.
- 3. Looped Bellows Width: 5 to 6 inches, exclusive of
- flanges.
- 4. Complete with prefabricated corner units,
- intersection units and splicing materials.
- 5. Manufacturers: Provide products that comply with
- project requirements and are made by one of the
- following:
- a. ____________.
- b. ____________.
- c. ____________.
-
- D. Reglets: Units of type and profile indicated, compatible
- with stainless steel, non-corrosive.
-
- E. Gutter Guards: Stainless steel mesh or fabricated units,
- hinged for cleaning, with selvaged edges and non-
- corrosive fasteners. Select materials for compatibility
- with gutters and downspouts.
-
- F. Conductor-Head Guards: Bee-hive type stainless steel
- mesh or fabricated units, removable for cleaning, with
- selvaged edges and non-corrosive fasteners. Select
- materials for compatibility with gutters and downspouts.
-
- G. Roofing Cement: ASTM D 2822, asphaltic.
-
- 2.3 METAL FABRICATION
-
- A. Shop-fabricate work to greatest extent possible.
-
- B. Conform to dimensions and profiles indicated. Comply
- with details shown and with applicable requirements of
- SMACNA Architectural Sheet Metal Manual and other
- recognized industry practices.
-
- C. Fabricate for waterproof and weather-resistant
- performance, with expansion provisions for running work
- sufficient to permanently prevent leakage, damage, or
- deterioration of the work.
-
- D. Form work to fit substrate. Comply with material
- manufacturer's instructions and recommendations for
- forming material. Form exposed stainless steel work
- without excessive oil-canning, buckling, and avoidable
- tool marks, true to line and levels indicated, with
- exposed edges folded back to form hems.
-
- E. Seams: Fabricate non-moving joints with flat-lock seams.
- Tin edges to be seamed, form seams, and solder. Rivet
- joints for additional strength where required.
-
- F. Hooked-Type Joints: Where lapped or bayonet-type
- expansion provisions in work cannot be used or would not
- be sufficiently water- or weatherproof, form expansion
- joints of intermeshing hooked flanges, not less than 1
- inch deep, filled with mastic sealant concealed within
- joints.
-
- G. Sealant Joints: Where movable, non-expansion type joints
- are indicated or required for proper performance of work,
- form metal to provide for proper installation of
- elastomeric sealant, in compliance with SMACNA standard
- details.
-
- H. Separations: Provide for separation of metal from
- different metal types and corrosive substrates by coating
- concealed surfaces at locations of contact with
- bituminous coating or other permanent separation as
- recommended by manufacturer or fabricator.
-
-
- PART 3 EXECUTION
-
- 3.1 PREPARATION
-
- A. Coordinate work of this section with adjoining work for
- proper sequencing of each installation to ensure best
- possible weather resistance and durability of work and
- protection of materials and finishes.
-
- 3.2 INSTALLATION
-
- A. Except as otherwise indicated, comply with manufacturer's
- installation instructions and recommendations and with
- SMACNA Architectural Sheet Metal Manual.
- 1. Anchor units of work securely in place by methods
- indicated, providing for thermal expansion of units;
- conceal fasteners where possible, and set units true
- to line and level as indicated.
- 2. Install work with laps, joints, and seams that will
- be permanently watertight and weatherproof.
-
- B. Galvanic Action Protection: Isolate different metal types
- from each other to prevent galvanic action.
-
- C. Underlayment: Where installation is to be directly on
- cementitious or wood substrate, install slip sheet over a
- course of roofing felt.
-
- D. Soldering: Tin uncoated stainless steel surfaces for a
- width of 1-1/2 inches at edges, using solder recommended
- for stainless steel work. Exception: Where surfaces are
- terne-coated stainless steel, do not tin edges, but wire
- brush terne coating before soldering.
-
- E. Bed flanges of work in a thick coat of bituminous roofing
- cement where required for waterproof performance.
-
- F. Install reglets to receive counterflashing in manner and
- by methods indicated. Where shown in concrete, furnish
- reglets to trades of concrete work for installation.
- Where shown in masonry, furnish reglets to trades of
- masonry work for installation.
-
- G. Install counterflashing in reglets, either by snap-in
- seal arrangement or by soldering in place for anchorage
- and filling reglet with mastic or elastomeric sealant, as
- indicated and depending on degree of sealant exposure.
-
- H. Install elastic expansion joints in accordance with
- manufacturer's recommendations.
- 1. Where required, provide for movement at joints by
- forming loops or bellows in width of flashing.
- 2. Locate cover or filler strips at joints to facilitate
- complete drainage of water from flashing.
- 3. Seam adjacent flashing sheets with adhesive, seal and
- anchor edges in accordance with manufacturer's
- recommendations.
- 4. Nail flanges of expansion joint units to curb
- nailers, at maximum spacing of 6 inches on center.
- 5. Fabricate seams at joints between units with minimum
- 3 inch overlap, to form a continuous, waterproof
- system.
-
- I. Install continuous gutter guards on gutters and conductor-
- head guards at conductor heads.
-
- 3.3 CLEANING AND PROTECTION
-
- A. Clean exposed stainless steel surfaces, removing
- substances that might cause staining, corrosion, or
- deterioration of finish or that would interfere with
- uniform oxidation and weathering.
-
- B. Protect flashings and sheet metal work during
- construction to ensure that work will be without damage
- or deterioration other than natural weathering at time of
- Substantial Completion.
-
-
- END OF SECTION
-