SECTION 07410 MANUFACTURED ROOF PANELS (Alternate No. 1)

PART 1 - GENERAL 1.01

RELATED DOCUMENTS A.

1.02

Drawings and general provisions of Contract, including General and Supplementary Conditions and Division-1 Specification Sections, apply to this Section.

SUMMARY A.

Work described in this section includes preformed metal roofing system complete with clips, perimeter and penetration flashing, copings, closures, gutters and downspouts.

B.

Related Sections: The following sections contain requirements that relate to this Section: 1.

1.03

Division-7 Section "Flashing and Sheet Metal" for roof flashing and other sheet metal work.

SUBMITTALS A.

Shop Drawings: Show roofing system with flashings and accessories in plan and elevation; sections and details at scale of 3" = 1'-0". Include metal thicknesses and finishes, panel lengths, joining details, anchorage details, flashings and special fabrication provisions for termination and penetrations; purlin and girt locations, thermal expansion provisions and special supports. Indicate relationships with adjacent and interfacing work.

B.

Product Data: Include manufacturer's detailed material and system descriptions, sealant and closure installation instructions, engineering performance data and finish specifications.

C.

Design Calculations: 1.

Submit design calculations prepared by a structural engineer, indicating compliance with specified design and performance criteria including thermal movement and fastener pullout calculations. Indicate fastener types and spacings.

2.

D.

E.

Test Reports: 1.

Submit reports from a testing laboratory that bears the stamp of a registered structural engineer to show compliance with specified performance criteria.

2.

Tests shall have been made for identical systems within the ranges of specified performance criteria.

3.

If test data is not available, or if data does not represent project conditions, Contractor shall be responsible for securing satisfactory tests by an independent testing agency acceptable to Architect, with all costs of such testing borne by the Contractor.

Samples: 1.

1.04

Submit samples of panel section, at least 2'-0" in length by full width, indicating thickness profile texture and color.

JOB CONDITIONS A.

Determine that work of other trades will not hamper or conflict with necessary fabrication and storage requirements for preformed metal roofing system.

B.

Protection:

C.

1.05

Empirical calculations for roof performance shall only be acceptable for positive loads.

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.

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.

QUALITY CRITERIA A.

Applicable Standards:

1.

American Iron and Steel Institute (AISI): 1986

2.

3.

Specification for the Design of Cold-Formed Steel Structural Members.

American Society for Testing and Materials (ASTM): A792-86

Specification for Steel Sheet, Aluminum-Zinc Alloy-Coated by the Hot-Dip Process.

B209-86

Specification for Aluminum and Aluminum-Alloy Sheet and Plate.

A446-83

Specification for Steel Sheet Zinc-coated (galvanized) by the Hot-Dip process, structural (physical) quality.

D1056-86

Specification for Flexible Cellular Materials, made from Olefin plastics.

D3575-84

Test Method for Rate of Air Leakage Through Exterior Windows, Curtain Walls, and Doors.

E330-84

Test Method for Structural Performance of Exterior Window, Curtain Walls, and Doors by Uniform Static Air Pressure Difference.

American Architectural Manufacturer Association (AAMA): 501.1-83

4.

Copper Development Association (CDA): 1985

5.

Standard Test Method for Metal Curtain Walls for Water Penetration using Dynamic Pressure.

Standards Handbook, Alloy Data/2.

Sheet Metal and Air Conditioning Contractors National Association (SMACNA): 1979

Architectural Sheet Metal Manual

6.

Underwriters' Laboratories (UL): 580-80

B.

C.

1.06

Standards for Tests for Wind-Uplift Resistance of Roof Assemblies.

Fabricator/Installer Qualifications: 1.

Fabricator/installer shall be trained and approved by system manufacturer, with trained supervisory personnel observing and directing work.

2.

If required, fabricator/installer shall submit work experience and evidence of adequate financial responsibility. Architect reserves the right to inspect fabrication facilities in determining qualifications.

Applicable Erection Tolerances: Maximum variation from true planes or lines: 1/4" in 20'-0"; 3/8" in 40'-0" or more.

DESIGN AND PERFORMANCE CRITERIA A.

B.

Thermal Movement: 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.

2.

Interface between panel and clip shall provide for minimum threeinches of thermal movement in each direction along the longitudinal direction.

3.

Location of metal roofing rigid connector shall be designed per job conditions by roof system manufacturer.

Uniform Wind Load Capacity: 1.

Installed roof system shall withstand positive and negative design wind loading pressures complying with applicable local building codes and requirements specified herein.

2.

Capacity shall be determined using pleated airbag method in accordance with the principles of ASTM E330, Procedure A, adapted to testing of roof panels as follows:

3.

(7.1)

Roof test specimens shall be either full length or representative of the main body of the roof-free from edge restraint of perimeter attachments, continuous over one or more supports, and containing at least five panel modules for standing seam roof.

(7.1.2)

No attachments shall be permitted at sides or end perimeter other than those that occur uniformly throughout roof. Side and end seals shall be flexible and in no way restrain crosswise distortion of panels.

(7.2.1)

Panels and accessories shall be production materials of same type and thickness proposed for use on project.

(10.1.1)

Seals or film shall not span any crevices or cracks that may tend to separate under pressure.

Installed roof system shall carry positive uniform design loads with a maximum system deflection of L/140 as measured at the Rib (web) of the panel.

C.

Underwriters' Laboratories, Inc. (UL), Wind Uplift Resistance Classification: Roof assembly shall be classified as Class UL 90, as defined by UL 580.

D.

Concentrated Load Capacity: System shall withstand a load of 250-lbs. applied to a four square inch area located in the center of the panel between stiffener ribs without buckling of ribs or permanent panel distortion.

E.

Static Pressure Air Infiltration: Completed roof system shall have maximum of 0.01 cfm/sq. ft. with 6.24 psf air pressure differential per ASTM E283.

F.

Water Penetration (Dynamic Pressure): No uncontrolled water penetration, other than condensation, when exposed to dynamic rain and 130 mph wind velocities for not less than five-minutes duration, when tested in accordance with principles of AAMA 501.1.

G.

Capacities for gauge, span or loading other than those tested may be determined by interpolation of test results within the range of test data. Extrapolation for conditions outside test range are not acceptable.

1.07

DELIVERY, STORAGE, AND HANDLING A.

1.08

1.09

Deliver panels and other components so they will not be damaged or deformed. Package wall and roof panels for protection against transportation damage. 1.

Protect components during fabrication, shipment, handling and erection 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.

Handling: Exercise care in unloading, storing, and erecting wall and roof covering panels to prevent bending, warping, twisting, and surface damage.

C.

Stack materials on platforms or pallets, covered with tarpaulins or other suitable weathertight ventilated covering. Store metal wall and roof panels so that they will not accumulate water. Do not store panels in contact with other materials that might cause staining, denting, or other surface damage.

D.

Inspect materials upon delivery. Reject and remove physically damaged or marred material from project site.

WARRANTY A.

Finish Warranty: Furnish panel manufacturer's written twenty (20) year warranty covering failure of the factory-applied exterior finish on metal roof panels within the warranty period. This warranty shall be in addition to, and not a limitation of other rights the Owner may have against the Contractor under the Contract Documents.

B.

Installer's two-year warranty covering roofing system installation and watertightness. All warranties shall commence on Date of Substantial Completion.

PRE-ROOFING CONFERENCE A.

Prior to beginning metal roofing work, preroofing conference shall be held to review work to be accomplished. 1.

Contractor, metal roofing subcontractor, metal roofing system manufacturer's representative and all other subcontractors who have equipment penetrating roof or whose work involves access to roof shall be present.

2.

Contractor shall notify Architect and other attending parties at least three days prior to time for conference.

3.

Contractor shall record minutes of meeting and shall distribute copies of minutes to attending parties.

PART 2 - PRODUCTS 2.01

MANUFACTURERS A.

Manufacturer: Subject to compliance with requirements, provide roof panels by one of the following: 1. 2. 3.

2.02

SHEET MATERIALS A.

2.03

AEP-Span, Snap-Seam System BHP Steel Building Products, Inc., 1-1/2-inch Design Span System Kovach Properties, Inc., K-LOK

Structural Quality Galvanized Steel Sheet: Hot-dip zinc-coated steel sheet complying with ASTM A 446 with G90 coating complying with ASTM A 525, Grade A.

METAL FINISHES A.

General: Protect coating either by application of strippable film or by packing plastic film or other suitable material between panels in a manner to properly protect the finish. Furnish air-drying spray finish in matching color for touch-up. 1.

B.

Color: Selected by Architect from manufacturer’s full range of standard colors.

Fluoropolymer Coating: Manufacturer's standard two-coat, thermo-cured, full-strength 70 percent "Kynar 500" coating consisting of a primer and a minimum 0.75-mil dry film thickness with a total minimum dry film thickness of 0.9 mil and 30 percent reflective gloss when tested in accordance with ASTM D 523. 1.

Durability: Provide coating that has been field tested under normal range of weathering conditions for minimum of 20-years without significant peel, blister, flake, chip, crack, or check in finish; without chalking in excess of No. 8 in accordance with ASTM D 659; and without fading in excess of 5 NBS units.

2.04

MISCELLANEOUS MATERIALS A.

B.

Fasteners: Self-tapping corrosion-resistant steel screws, bolts, nuts, selflocking rivets, self-locking bolts, end-welded studs, and other suitable fasteners designed to withstand design loads. 1.

Provide exposed fasteners with heads matching color of roof or wall panel by means of plastic caps or factory-applied coating.

2.

Provide metal-backed neoprene washers under heads of exposed fasteners bearing on weather side of panels.

3.

Locate and space exposed fasteners in true vertical and horizontal alignment. Use proper tools to obtain controlled uniform compression for positive seal without rupture of neoprene washer.

Accessories: Provide components required for a complete roof panel system, including trim, copings, fascias, gravel stops, mullions, sills, corner units, ridge closures, clips, seam covers, battens, flashings, gutters, and downspouts, sealants, gaskets, fillers, closure strips, and similar items. Match materials and finishes of panels. 1.

Closure Strips: Closed-cell, self-extinguishing, expanded cellular rubber or cross-linked polyolefin foam flexible closure strips. Cut or premold to match configuration of roof and wall panels. Provide closure strips where necessary to ensure weathertight construction.

2.

Sealing Tape: Pressure-sensitive 100 percent solids polyisobutylene compound sealing tape with release paper backing. Provide permanently elastic, nonsag, nontoxic, nonstaining tape.

3.

Joint Sealant: One-part silicone rubber sealant color as selected by Architect from sealant manufacturer's standard selection. a. b.

C.

Dow Chemical Co., #790. General Electric Co., GESIL N 2500.

Bituminous Coating: Cold-applied asphalt mastic, SSPC paint 12, compounded for 15 mil dry film thickness per coat.

2.05

2.06

PANEL FABRICATION A.

Shop fabricate metal roofing and flashing components to the maximum extent possible, forming metal work with clear, sharp, straight and uniform bends and rises. Hem exposed edges of flashings.

B.

Form flashing components from full single width sheet. Provide shop fabricated, mitered corners, joined using closed end pop rivets and joint sealant.

C.

Fabricate roofing and related sheet metal work in accordance with approved shop drawings and applicable standards.

D.

Solder manufactured sheet metal joints with heavy, well-heated coppers. Pre-tin joints not less than 1-1/2" wide. Provide 1" minimum soldered joints. After soldering, wash joints and neutralize remaining acid with alkaline solution.

E.

Provide linear sheet metal items in minimum 10'-0" sections, except as otherwise noted. Form flashing using single pieces for the full width. Provide shop fabricated, mitered and joined corners.

F.

Apply bituminous coating or other permanent separation materials on concealed panel surfaces where panels would otherwise be in direct contact with substrate materials that are noncompatible or could result in corrosion or deterioration of either material or finishes.

ROOF PANELS A.

Standing Seam Roof Panels: Factory formed, stucco-embossed panels designed for concealed clip installation. Snap-on battens or seam covers not acceptable. Form panels from 24-gauge (0.0239-inch) zinc-coated galvanized steel sheets. 1.

Configuration: Standing seams incorporating mechanically interlocked, concealed anchor clips allowing thermal movement, and of configuration which will prevent entrance or passage of water.

2.

Seam: Seam spacing 16”, 1-1/2” minimum height. Seam shall have continuous anchor reveals to allow anchor clips to resist positive and negative loading and allow expansion contraction of panels due to thermal changes. Integral (not mechanically sealed) seams are not acceptable.

3.

Panel Length: Full length without joints, including bends.

4.

2.07

SOFFIT PANELS A.

General: Provide flush steel panel system fabricated from 24-gauge galvanized steel sheets, in interlocking profile (12-inches wide by 1-inch deep) designed for installation with concealed fasteners. Provide trim pieces, access panels, louvers, and related accessories as indicated. Finish panels as indicated in “Metal Finishes” Article of this Section. Color to match or contrast with roof panels at Architect’s option. 1.

2.08

Replacability: Individual panels shall be removable for replacement without removing adjacent panels.

Perforated Soffit Vents: Continuous soffit vent system, 7-inches wide with 23 percent (8-square inches/L.F.) open ventilation area. Fabricate from pre-finished aluminum or galvanized steel. Provide units similar to Cheney continuous soffit vent system, offered by Cheney Flashing Co.

UNDERLAYMENT MATERIALS A.

Self-Adhering, Polymer-Modified, Bituminous Sheet Valley Flashing: ASTM D 1970, minimum of 40 mils (1 mm) thick. Provide primer when recommended by underlayment manufacturer. 1.

Products: Subject to compliance with requirements, provide one of the following: WinterGuard; CertainTeed Corporation Bituthene Ice and Water Shield; Grace: W.R. Grace & Co. Nordshield Ice and WaterGard; Nord Bitumi US, Inc.

B.

Felts: ASTM D 226, Type II (No. 30), asphalt-saturated organic felts.

PART 3 - EXECUTION 3.01

PANEL SUPPORTS AND ANCHORAGE A.

Purlin, and other secondary structural panel support members and anchorage shall be installed in accordance with AISC Manual of Steel Construction "Code of Standard Practice."

3.02

ROOFING PANEL AND FLASHING INSTALLATION A.

Install roofing and flashings in accordance with shop drawings and manufacturer's data.

B.

Comply with manufacturers' instructions and recommendations for installation, as applicable to project conditions and supporting substrates. Anchor panels and other components of the work securely in place, with provisions for thermal and structural movement. 1.

Field cutting of exterior panels by torch is not permitted.

2.

Install panels with concealed fasteners.

C.

Underlayment and Flashing Installation: Install 30-pound felt under full extent of metal roofing system. Install modified bituminous valley flashing in 72-inch widths at valleys. Install gutter flashing 4-feet up roof rake, 10-feet beyond ends of gutters, behind fascia, and where indicated.

D.

Isolate dissimilar metals and masonry or concrete from metals with bituminous coating. Use gasketed fasteners where required, to prevent corrosive action between fastener, substrate and panels.

E.

Anchorage shall allow for temperature expansion/ contraction movement without stress or elongation of panels, clips or anchors. Attach clips to structural substrate using fasteners of size and spacing as determined by manufacturer's design analysis to resist specified uplift and thermal movement forces.

F.

Seal laps and joints in accordance with roofing system manufacturer's product data.

G.

Coordinate flashing and sheet metal work to provide weathertight conditions at roof terminations. Fabricate and install in accordance with standards of SMACNA Manual using continuous cleats at all exposed edges.

H.

Provide for temperature expansion/contraction movement of panels at roof penetrations and roof mounted equipment in accordance with system manufacturer's product data and design calculations.

I.

Installed system shall be true to line and plane and free of dents, and physical defects with a minimum of oil canning.

J.

Accessories: Install components required for a complete roof or wall panel system, including trim, copings, fascias, gravel stops, mullions, sills, corner units, ridge closures, clips, seam covers, battens, flashings, gutters, downspouts, louvers, sealants, gaskets, fillers, closure strips, and similar items.

K.

Joint Sealers: Install gaskets, joint fillers, and sealants where indicated on shop drawings and where required for weatherproof performance of panel systems. Provide types of gaskets, sealants, and fillers recommended by panel manufacturer. 1.

L.

3.03

Provide weatherseal under ridge cap. Flash and seal roof panels at eave and rake with rubber, neoprene, or other closures to exclude weather.

Installation Tolerances: Shim and align panel units within installed tolerance of 1/4-inch in 20'-0" on level/plumb/slope and location/line as indicated, and within 1/8-inch offset of adjoining faces and of alignment of matching profiles.

CLEANING AND PROTECTION A.

Damaged Units: Replace panels and other components of the work that have been damaged or have deteriorated beyond successful repair by means of finish touch-up or similar minor repair procedures.

B.

Cleaning: Remove temporary protective coverings and strippable films (if any) as soon as each panel is installed. Upon completion of panel installation, clean finished surfaces as recommended by panel manufacturer, and maintain in a clean condition during construction.

**END OF SECTION**