SECTION STANDING SEAM METAL ROOF

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City of Lebanon 07400 Standing Seam Metal Roof

5th Street Reservoir -1- January 2013

SECTION 07400

STANDING SEAM METAL ROOF

PART 1 - GENERAL

1.01 SECTION INCLUDES

A. Work described in this section includes pre-formed standing seam metal roofing

system complete with clips, perimeter and penetration flashing, flashing, and closures for new building.

B. Associated accessories and trim.

1.02 RELATED SECTIONS

A. Section 05100 - Structural Steel

B. Section 06000 - Carpentry

C. Section 07190 - Vapor Layer

D. Section 07600 - Flashing and Sheet Metal.

1.03 REFERENCES

A. Underwriters' Laboratories (UL):

B. American Society for Testing and Materials (ASTM):

C. American Architectural Manufacturer Association (AAMA): Standard 501.1

Standard Test Method for Metal Curtain Walls for Water Penetration.

D. American Society of Civil Engineers (ASCE):

1. ASCE 7-Current Editions (2002) - Minimum Design Loads for Buildings

and Other Structures.

E. Sheet Metal and Air Conditioning Contractors National Association (SMACNA):

1. 1993 Edition - Architectural Sheet Metal Manual, 5th edition.

1.04 REGULATORY REQUIREMENTS

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1.05 SUBMITTALS

A. Shop Drawings - Show roofing system with flashings and accessories in plan,

sections, and details. Include metal thickness' and finishes, panel lengths, joining details, anchorage details, flashings and special fabrication provisions for termination and penetrations; thermal expansion provisions and special supports. Indicate relationships with adjacent and interfacing work. Indicate fastener types and spacing; and provide fastener pullout values. Shop drawings must be completed by the metal panel manufacturer's engineering department.

B. Product Data: Include manufacturer's detailed material and system description,

sealant and closure installation instructions, engineering performance data and finish specifications. Indicate fastener types and spacing; and required fastener pullout values.

C. Design Loads: Submit copy of manufacturer's minimum design load calculations

according to most current ASCE 7, Method 2 for Components and Cladding, sealed by a registered professional engineer employed by the system manufacturer as a full-time staff engineer. In no case shall the design loads be taken to be less than those specified. Design Test Reports: Provide certified test reports from an independent testing laboratory that bear the seal of a registered professional engineer to show compliance with the performance criteria specified in article 1.9.

1.06 QUALITY CONTROL

A. All systems submitted to meet the specified material must be accompanied by a

copy of manufacturer’s specifications. Roofing specifications and shop drawings shall be signed and sealed by a professional engineer licensed in the state of Oregon. Roof system submittals without licensed engineer certification shall be rejected.

B. Engage an experienced metal roofing contractor (erector) to install standing

seam system who has a minimum of three (3) years' experience specializing in the installation of structural standing seam metal roof systems.

C. Successful contractor is required to maintain a full-time supervisor/foreman who is on the job-site at all times during installation of new roof system. Foreman must have a minimum of five (5) years' experience with the installation of system similar to that specified.

D. Successful contractor must obtain all components of roof system from a single

manufacturer including any roll good materials if required. Any secondary products that are required which cannot be supplied by the specified manufacturer must be recommended and approved in writing by primary manufacturer prior to bidding.

E. Design and Test Reports: Provide certified test reports from an Independent

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1.07 DELIVERY, STORAGE, AND HANDLING.

A. Manufacturer's responsibility:

1. Protect components during fabrication and packing from mechanical

abuse, stains, discoloration, and corrosion.

2. Provide protective interleaving between contact areas of exposed

surfaces to prevent abrasion during shipment, storage, and handling.

B. Installer's responsibility:

1. Store materials off ground providing for drainage; under cover providing

for air circulation; and protected from wind movement, foreign material contamination, mechanical damage, cement, lime or other corrosive substances.

2. Handle materials to prevent damage to surfaces, edges and ends of

roofing sheets and sheet metal items. Damaged material shall be rejected and removed from the site.

3. Protect panels from wind-related damages.

4. Inspect materials upon delivery. Reject and remove physically damaged

or marred material from project site.

5. Protective film on roof panels must be removed in a period of time which

allows for FULL removal of all film. If any film residue remains on panel(s), it is the installer's responsibility to clean and remove residue at Owner's request. Note: Cure time may vary based on environmental conditions.

1.08 JOB CONDITIONS

A. Determine that work of other trades will not hamper or conflict with necessary

fabrication and storage requirements for pre-formed metal roofing system.

B. Protection:

1. Provide protection or avoid traffic on completed roof surfaces. 2. Do not overload roof with stored materials.

3. Support no roof-mounted equipment directly on roofing system.

C. Ascertain that work of other trades which penetrates the roof or is to be made

watertight by the roof is in place and approved prior to installation of roofing.

1.09 DESIGN AND PERFORMANCE CRITERIA

A. Thermal Expansion and Contraction:

1. Completed metal roofing and flashing system shall be capable of

withstanding expansion and contraction of components caused by changes in temperature without buckling, producing excess stress on structure, anchors or fasteners, or reducing performance ability.

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3. Interface between panel and clip shall provide for thermal movement in each direction along the longitudinal dimension.

4. Location of metal roofing rigid connector shall be as shown on the plans

or as required by the roofing engineer

B. Uniform Wind Uplift Load Capacity: Installed roof system shall withstand negative (uplift) design wind loading pressures complying with the following criteria.

1. Design Code: Current ASCE 7, Method 2 for Components and Cladding.

2. Safety Factor: 1.65 after any load reduction or material stress increase. 3. Category II Building with an Importance Factor of 1.15

4. Wind Speed: 94.5 mph.

5. Ultimate Pullout Value: 590 pounds per each of the two fasteners holding

the panel anchor to the roof decking or framing system.

6. Exposure Category: B

C. Capacity shall be determined using pleated airbag method in accordance with

ASTM E 1592, testing of sheet metal roof panels. Allowable safe working loads shall be determined by dividing the ultimate test load by the safety factor specified above.

D. Uniform Positive Load Capacity.

1. The installed roof system shall be capable of resisting the following

positive uniform roof loads: Roof Live Load of 25 psf; Roof Snow Load of 25 psf.

2. Capacity to resist positive loads shall be determined by empirical

calculations in accordance with AISI. Calculation shall be sealed by a registered professional engineer.

3. Installed roof system shall carry positive uniform design loads with a

maximum system deflection of L/180 as measured at the rib (web) of the panel.

4. Underwriters' Laboratories, Inc., (UL) fire resistance P ratings for roof assemblies: If applicable, panel system shall be approved for use in an appropriate Construction Assembly, as defined by UL 26C.

5. Underwriters’ Laboratories, Inc., (UL) Class A roofing material acceptable for use in an approved Class A fire rating per UL 790.

E. Water penetration: Provide hydrostatic assembles for no water penetration, other than condensation, when exposed to ponding water from rain and wind and damming by ice and snow.

1.10 WARRANTIES

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PART 2 - PRODUCTS

2.01 APPROVED MANUFACTURES AND PROFILES

A. AEP Span "Span Lok hp" manufactured by ASC Profiles, Inc, Tacoma, WA, with 16-inch pan width.

B. MS200 from Taylor Metal Products, Inc., Salem, OR, with 18-inch panel width.

C. Substitutions: Approval of substitute systems per Section 01600. 2.02 MATERIALS

A. Roof Panels:

1. 24 gauge, prefinished, Galvalume® or Zincalume® sheet with Kynar

500® finish

2. Fabricate panels with sufficient thickness to meet specified UL 90 wind

uplift requirements.

3. Factory fabricated panel with integral continuous overlapping seams

suitable for continuous locking or crimping by mechanical means during installation.

4. Provide factory installed, high grade, hot-melt elastomeric sealant, within the confines of female seam flange, on bottom edge of female seam flange, designed to seal against adjacent male panel leg.

B. Clip/ Fastener Assemblies:

1. Typical clip meeting UL 90 requirements:

2. Fasteners: Manufacturer’s standard #12 - 14 x 1 1/4" long self-drilling, self-tapping hex head drive screws for metal; no corrosive base material.

3. UL Rated Clip: Sliding 22 gauge galvanized steel hook in combination

with a double fastened 16 gauge galvanized steel base, both at Fy (MIN) = 33 ksi. Clip hook shall have a shop installed hot-melt butyl sealant for continuity of seal at clip locations.

C. Accessories:

1. Provide manufacturer’s standard accessories and other items essential to

completeness of standing seam roof installation.

2. Gutters will be fabricated to the same gauge and specification as panel.

D. Field Sealant:

1. Color coordinated primerless silicone or high grade, nondrying butyl as

recommended by panel manufacturer.

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2.03 FABRICATION

A. Panels:

1. Provide factory formed panel widths of 16" by 2" high standing seam, or 16" by 3" high standing seam.

2. Provide panels in full length from ridge to eave.

3. Where single length panels are not practical, provide positive joint end

laps, fabricated with overlap in direction of water flow to accommodate water run-off.

4. Roof panels shall have flush horizontal and vertical or panned surfaces to facilitate sealing at terminations.

B. Seams:

1. Panel seams shall interlock entire length of seam.

2. Design standing seam to lock up and resist joint disengagement during

design wind uplift conditions as calculated according to local building codes.

3. Provide factory sealant within confines on trailing edge of female seam

leg to aid in resistance of leaks and provide panel-to-panel seal while allowing expansion and contraction movement, and the seams shall be continuously locked or crimped together by mechanical means during installation.

C. Clips:

1. Provide UL listed clip designed to allow panels to thermally expand and

contract and provide ± 1 inch of thermal movement. Clip shall incorporate a self-centering feature to allow 1" of movement in both directions along panel length.

2. Clip shall be designed to meet positive and negative pressures as

calculated per local building code.

D. Engineer panels to use concealed anchors that permit expansion and

contraction, except at eaves, end laps, ridges, valleys, hips and gables. 2.04 FINISH

A. Fluorocarbon Coating:

1. Full strength 70% Kynar 500® coating baked on for 15 minutes at 450

degrees F to dry-film thickness of 1.0 mil.

2. 15% reflective gloss (ASTM D 523) (Low Gloss).

3. 0.3 mil baked on epoxy primer.

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PART 3 - EXECUTION 3.01 INSTALLATION

A. Comply with manufacturer’s instructions for assembly, installation, and erection

in order to achieve weather tight installation. Install in accordance with approved shop drawings.

B. Standing Seam System:

1. Install panels in accordance with engineered shop drawings and

manufacturer’s instructions and recommendations.

2. Anchor securely in place using clips and fasteners spaced in accordance

with manufacturer’s recommendations for design wind load criteria.

C. Roof Penetrations

1. Provide water tight flashing assemblies with standing seam metal roof.

D. Dissimilar Metals:

1. Where sheet metal is in contact with dissimilar metals, execute juncture to facilitate drainage and minimize possibility of galvanic action.

2. At point of contact with dissimilar metal, coat metal with protective paint or tape which can be placed between metals.

E. Field apply sealant to penetrations, transitions, and other locations necessary

(not standing seam) for airtight, waterproof installation. 3.02 CLEANING

A. Clean exposed surfaces of work promptly after completion of installation. 3.03 PROTECTION

A. Protect work as required to ensure roofing will be without damage at time of final completion.

3.04 SCHEDULES OF ROOFING

A. Building: See Contract Plans

B. Approved Color: AEP Cool Old Town Gray

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SECTION 07600

STANDING SEAM METAL ROOF WARRANTY

PART 1 - GENERAL

1.01 SECTION INCLUDES

A. Standing Seam Metal Roofing System Warranty.

B. Associated accessories and trim.

1.02 RELATED SECTIONS

A. Section 07415 - Standing Seam Metal Roof

1.03 SUBMITTALS

A. Submit manufacturer's warranty form. Submit in accordance with Section 01300.

PART 2 - PRODUCTS - NOT USED

PART 3 - EXECUTION 3.01 GENERAL

A. Roof Manufacturer shall provide a 20-year warranty meeting the requirements of

the following form: