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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