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SECTION 07613
SHEET STAINLESS STEEL ROOFING
NOTE ** This section includes stainless steel sheet
roofing. Styles include flat seam, standing seam,
batten seam and horizontal seam (Bermuda style)
systems. The section is intended to cover custom
fabricated products, but may also be used for
standard products.
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
NOTE ** Delete items below not required for project.
A. Flat-seam stainless steel roofing.
B. Standing-seam stainless steel roofing.
C. Batten-seam stainless steel roofing.
D. Horizontal-seam (Bermuda type) stainless steel roofing.
E. Preformed stainless steel roofing.
F. Custom-designed stainless steel roofing.
1.2 RELATED SECTIONS
NOTE ** Delete any sections below not relevant to this
project; add others as required.
A. Section 05120 - Structural Steel: Roof framing.
B. Section 05310 - Steel Deck.
C. Section 06100 - Rough Carpentry: Roof framing and
sheathing.
D. Section 06150 - Wood Decking.
E. Section 07210 - Building Insulation.
F. Section 07623 - Sheet Stainless Steel Flashing:
Stainless steel flashing and other trim not part of
roofing.
NOTE ** Edit the following paragraph to identify relevant
items that are not included in this section but are
included in the roof specialties section instead,
such as reglets, elastic expansion joints,
ornamental items.
G. Section 07713 - Manufactured Stainless Steel Roof
Specialties: Accessories on roof other than mechanical
and structural items.
H. Section 07900 - Joint Sealers.
I. Section 09900 - Paints and Coatings: Field painting.
1.3 REFERENCES
NOTE ** Delete references from the list below that are not
actually required by the text of the edited
section.
A. ASCE 7 - Minimum Design Loads for Buildings and Other
Structures; American Society of Civil Engineers.
B. ASTM A 240/A 240M - Standard Specification for Heat
Resisting Chromium and Chromium-Nickel Steel Plate,
Sheet, and Strip for Pressure Vessels.
C. ASTM A 308 - Standard Specification for Sheet, Terne
(Lead-Tin Alloy) Coated by the Hot-Dip Process.
D. ASTM E 907 - Standard Test Method for Field Testing
Uplift Resistance of Roofing Systems Employing Steel
Deck, Rigid Insulation and Bituminous Built-Up Roofing.
E. 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.
F. SMACNA - Architectural Sheet Metal Manual; Sheet Metal
and Air Conditioning Contractors National Association,
Inc.; fifth edition, 1993.
1.4 PERFORMANCE REQUIREMENTS
NOTE ** Delete this entire article if the contractor or
manufacturer is not required to design the roofing
to particular performance criteria. An example is
when the sheet metal roof is completely detailed
without contractor options.
A. Design roof assembly to conform to the requirements of
ASCE 7, Minimum Design Loads for Buildings and Other
Structures.
NOTE ** Retain the paragraph below after consultation with
roofing manufacturer. Delete if UL Class 90 roof
is not required for the project, or modify if FM I-
90 or I-60 is required for the project.
B. Wind Uplift: Provide roof assemblies meeting
requirements of ASTM E 907 for UL Class 90 wind uplift
resistance.
1.5 SUBMITTALS
A. Submit in accordance with Section 01300.
B. Product Data: Submit metal manufacturer's and
fabricator's specifications, installation instructions,
and general recommendations for roofing applications.
C. Samples: 12 inch square specimens of specified stainless
steel roofing material.
D. Shop Drawings: Show manner of forming, joining, and
securing stainless steel roofing, and pattern of seams.
Show expansion joint details and waterproof connections
to adjoining work and at obstructions and penetrations.
1.6 QUALITY ASSURANCE
A. Installer Qualifications: A firm with 5 years of
successful experience with installation of stainless
steel roofing of type and scope equivalent to project
requirements.
NOTE ** Delete the following if not required. Custom work
of special quality or complexity may justify the
cost of an extensive mock-up.
B. Mock-Up: Before proceeding with installation, prepare a
mock-up incorporating materials and methods of
fabrication and installation identical with project
requirements.
1. Locate mock-up where indicated on drawings.
2. Retain accepted mock-up as quality standard for
acceptance of completed roofing.
3. If accepted, mock-up may be incorporated as part of
the work.
PART 2 PRODUCTS
2.1 MANUFACTURERS
NOTE ** Retain or insert manufacturers whose roofing
systems comply with project requirements and whose
availability for project have been verified.
A. Provide products manufactured by one of the following:
1. Allegheny Ludlum Corporation.
2. Armco, Inc.
3. Avesta Sheffield, Inc.
4. Atlas Stainless Steels.
5. J & L Specialty Steel, Inc.
6. Lukens, Inc.
7. North American Stainless.
NOTE ** Delete one of the two paragraphs below; coordinate
with Division 1 requirements.
B. Requests for substitutions will be considered in
accordance with provisions of Section 01600.
C. Substitutions: Not permitted.
2.2 SHEET METAL MATERIALS
NOTE ** Select one of the following stainless steel types
below: either uncoated stainless steel or terne-
coated stainless steel.
A. Stainless Steel Sheet for Roofing, Flashing, Accessories,
and Batten Caps: 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 for Roofing, Flashing, Accessories,
and Batten Caps: 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. Batten Bars and Strips: If size is not indicated,
provide battens of nominal 2 inch by 2 inch size (1-1/2
inch by 1-1/2 inch minimum).
1. Batten Bars: Stainless steel, thickness same as
sheet roofing material.
2. Wood Batten Strips: Fabricated to size indicated
from lumber complying with requirements of Section
06100 - Rough Carpentry and preservative treated by
pressure process using a chemical solution that is
non-hygroscopic and non-corrosive to type of
stainless steel roofing.
D. Nails: Stainless steel, AISI Type 300 series, 0.109 inch
minimum not less than 7/8 inch long ring or annular type.
E. Screws and Bolts: Stainless steel, AISI Type 300 series.
F. Cleats: Stainless steel, ____ inch thick, type ____; 2
inches wide x 3 inches long.
G. 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.
NOTE ** Edit the following paragraph to delete items that
are not relevant to project or which are specified
in another section.
H. Metal Accessories: Except as indicated as work of
another specification section, provide all other
components required for a complete roof system, including
trim, copings, fascias, ridge closures, clips, seam
covers, battens, flashings, gutters, louvers, and closure
strips. Match materials and finishes of roof.
I. Mastic Sealant: Polyisobutylene; non-hardening, non-
migrating, heavy-bodied mastic sealant.
J. Elastomeric Sealant: One-part elastomeric polyurethane,
polysulfide, butyl, or silicone rubber sealant as
recommended by the roofing manufacturer.
K. Bituminous Coating: Cold-applied asphalt mastic, SSPC-
Paint 12, 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.
2.3 ACCESSORY MATERIALS
NOTE ** Delete any of the accessory materials below that
are not required for the project.
A. Miscellaneous Materials: Provide protective coatings,
separators, sealants and other accessory items as
recommended by stainless steel sheet manufacturer and
fabricator for stainless steel roofing work, except as
otherwise indicated.
B. Roofing Felt: Asphalt or coal tar saturated felt
weighing not less than 30 lb per 100 square feet.
C. Fabric Underlayment: Manufacturer's standard non-woven
polyester fabric marketed for use in roofing systems
weighing 6.0 oz per sq yd, white, non-swelling, rot and
mildew resistant; type as recommended by roofing
manufacturer.
D. Slip Sheet: Minimum 4-lb rosin-sized building paper.
E. Sealing Tape: Pressure-sensitive 100 percent solids
polyisobutylene compound sealing tape with release paper
backing. Provide permanently elastic, non-sag, non-
toxic, non-staining tape.
2.4 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. Form and fabricate sheets, seams, strips, cleats,
valleys, ridges, edge treatments, integral flashings and
other components of stainless steel roofing to profiles,
patterns and drainage arrangements shown and as required
for permanently leakproof construction. Provide for
thermal expansion and contraction of the work, as
indicated.
F. Seams: Fabricate non-moving joints in stainless steel
sheet with flat-lock seams. Tin edges to be seamed, form
seams, and solder. Rivet joints for additional strength
where indicated.
G. 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
joint.
H. Sealant Joints: Where movable, non-expansion-type joints
are indicated or required for proper performance of work,
form stainless steel to provide for proper installation
of elastomeric sealant, in compliance with SMACNA
standard details.
I. Separations: Provide for separation of stainless steel
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 stainless steel roofing with rain drainage
work, flashing, trim and construction of decks, parapets,
walls, and other adjoining work to provide a permanently
leakproof, secure, and non-corrosive installation.
B. Clean surfaces to receive stainless steel roofing.
Substrate to be smooth and free of defects. Drive
projecting nails or other fasteners flush with substrate.
3.2 INSTALLATION
NOTE ** Delete all installation instructions below that are
not applicable to the project or the materials
being installed.
A. Except as otherwise shown or specified, comply with
recommendations and instructions of manufacturer of
stainless steel roofing being fabricated and installed
and with SMACNA Architectural Sheet Metal Manual.
B. Galvanic Action Protection: Isolate different metal
types from each other to prevent galvanic action.
NOTE ** Retain underlayment provisions below unless roofing
manufacturer agrees that it is unnecessary.
C. Install underlayment of slip sheet over a course of
roofing felt under stainless steel roofing unless
otherwise recommended by manufacturer of sheet metal.
Use adhesive for temporary anchorage, where possible, to
minimize use of mechanical fasteners under stainless
steel roofing. Lap joints 2 inches minimum.
D. Seal joints as shown and as required for leakproof
construction.
E. Hooked-Type Joints:
1. When ambient temperature is moderate at time of
installation, 40 degrees to 70 degrees F (4 degrees
to 21 degrees C), set joint members for 50 percent
movement either way.
2. Adjust setting proportionately for installation at
higher ambient temperatures.
3. Do not install at temperatures below 40 degrees F (4
degrees C).
4. Comply with requirements of Section 07900 for
handling and installing sealants.
F. Provide uniform, neat seams with minimum exposure of
solder, welds, and sealant.
G. In exposed work, conceal fasteners and expansion
provisions where possible and locate so as to minimize
possibility of leakage. Cover and seal fasteners and
anchors as required for a tight installation.
H. 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.
3.3 CLEANING
A. Remove protective film (if any) from exposed surfaces of
stainless steel roofing promptly upon installation.
Strip with care to avoid damage to finishes.
B. Clean exposed metal surfaces of substances that might
cause staining, corrosion, or deterioration of finish or
that would interfere with uniform oxidation and
weathering.
3.4 PROTECTION
A. Protect stainless steel roofing in a manner that ensures
that the work is without damage or deterioration other
than natural weathering at time of Substantial
Completion.
END OF SECTION