SECTION 07410
MANUFACTURED WALL PANELS
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of Contract, including General and Supplementary Conditions and Division I Specification Sections, apply to this Section.
1.2 SUMMARY
A. Scope of Work: Furnish and install metal wall panels and accessories in accordance with these specifications and all applicable drawings. Products to be
considered equal to those specified below must be approved in writing by the Architect prior to the bid date.
B. This section includes manufactured wall panels of the following type:
1. Field-assembled wall panels with exposed or non-exposed fasteners.
C. Related Sections: The following sections contain requirements that relate to this section:
1. Division 7 Section "Flashing and Sheet Metal" for roof and/or wall flashing and other sheet metal work.
2. Division 7 Section "Joint Sealants" for field-applied panel sealants.
1.3 SYSTEM PERFORMANCE REQUIREMENTS
A. Provide certified test results by a recognized testing laboratory or agency in accordance with specified test methods for each system.
B. Air Infiltration: Provide wall panel systems with an air infiltration rate of not more than 0.06 cfm per sq.ft. of fixed wall area when tested in accordance with
ASTM E283 at a static air pressure differential of psf.
C. Water Penetration: Provide panel systems with no water penetration as defined in the test method when tested in accordance with ASTM E331 at an inward
static air pressure differential of not less than 6.24 psf and not more than 12.0 psf.
D. The profile and gages of panel sections shall be required to withstand a wind load of +/- _____ psf and a maximum deflection of L/180 at this wind load.
Structural design calculations, as certified by a registered professional engineer shall be submitted to verify load carrying capacities of the panel system including
fastener calculations.
1.4 SUBMITTALS
A. General: Submit the following in accordance with Conditions of Contract and Division I Specification Sections.
1. Product data including manufacturer’s product specifications, standard details, certified product test results, installation instructions, and general
recommendations, as applicable to materials and finishes for each component and for total panel system.
2. Samples for verification purposes of wall panels. Provide sample panels 12 inches long by actual panel width, in the profile, style, color and texture indicated.
Include clips, battens.
3. Shop drawings showing layouts of panels on walls and roofs, details of edge conditions, joints corners, panel profiles, supports, anchorages, trim, flashings,
closures, and special details. Distinguish between factory and field assembly work.
1.5 QUALITY ASSURANCE
A. Field measurements: Where possible, prior to fabrication of panels, take field measurements of structure or substrates to receive panel system. Allow for
trimming panels units where final dimensions cannot be established to fabrication.
B. Panel manufacturer must have been fabricating the specified product for a minimum of ten (10) years.
C. The panel erector must have been in business erecting similar type material for not less than five (5) years and must be an approved applicator by the
manufacturer. The approval must be in writing and dated prior to the project bid date.
1.6 DELIVERY,STORAGE, AND HANDLING
A. Deliver panels and other components so they will not be damaged or deformed. Package wall panels for protection against transportation damage.
B. Handling: Exercise care in unloading, storing, and erecting wall 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 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.
1.7 WARRANTY
A. Finish Warranty: furnish panel manufacturer’s written warranty covering failure of the factory-applied exterior finish on metal wall 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.
1. Warranty period for factory-applied exterior finishes on wall panels is ___years after the date of Substantial Completion.
PART 2 - PRODUCTS
2.1 MANUFACTURERS
A. Materials: Metal wall panels shall be as manufactured by Morin Corporation, Bristol, Connecticut and shall consist of the following:
1. EXTERIOR PANELS shall be MORIN type ________, rollformed _____wide by _____deep with ribs ______on center. The exterior panel shall be
formed of:
a. No. ______U.S. Standard gauge galvanized steel in accordance with ASTM Spec.A653-94, having 0.90 oz. zinc per sq.ft. coating complying with ASTM
Spec. A-525-87 (smooth or embossed). OR
b. No. _____ U.S. Standard gauge galvalume steel (smooth or embossed) in accordance with ASTM Spec. A792-89 having 0.55 oz. zinc per sq.ft. OR
c. No. _____Thick aluminum 3003 H 14 alloy (plain mill finish or embossed).
2. INSULATION shall be fiberglass _____thick and have a "K" factor of or less.
3. INTERIOR PANELS shall be rollformed _____wide by_____deep MORIN type L______-______ with flange side joints, The interior panels shall be
formed of the following materials:
a. No _____U.S. Standard gauge galvanized steel in accordance with ASTM Spec.A653-94, having 0.90 oz. zinc per sq.ft.complying with ASTM Spec.
A-525-87 (smooth or embossed). OR
b. No ______U.S. Standard gauge type galvalume (smooth or embossed).
c. No._____Thick aluminum alloy ______(plain mill finish or embossed).
4. FLASHINGS AND CLOSURES are to be factory formed from the same type of gauge of materials as adjacent panels.
5. Subgirts shall be roll-formed sections of 18 gauge galvanized coated steel.
6. Factory Sealant shall be applied to the side joint of interior panels.
2.2 SHEET MATERIALS
A. Structural Quality Galvanized Steel Sheet: Hot-dipped zinc-coated steel sheet complying with ASTM A653 with G90 coating complying with ASTM A525,
Grade C minimum.
B. No. _____ U.S. Standard gauge galvalume steel .
C. No. _____thick aluminum alloy.
2.3 METAL FINISHES
A. General: Apply coating before forming and fabricating panels, as required by coating process and as required for maximum coating performance capability.
Protect coating either by application of strippable film or by packing plastic or other suitable material between panels in a manner to properly protect the finish.
Furnish air-drying finish in matching color for touch-up.
1. Color: Chosen from manufacturer’s standard colors or match the Architect’s sample for custom color.
B. Fluropolymer Coating: Manufacturer’s standard two-coat, thermo-cured, full strength 70 percent "Kynar500" coating consisting of a primer and a minimum
0.75 mils dry film thickness with a total minimum dry film thickness of 0.9 mils and 30 percent reflective gloss when tested in accordance with ASTM D523.
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 D659 and without fading in excess of 5 NBS units.
C. Apply factory 1.0 mils minimum prime coating and bake enamel (color Ascot white) to all exposed surfaces of liner panels.
D. Apply factory 0.5 mils minimum prime coating to non-exposed side of all panel sheets (face and liner panels).
2.4 MISCELLANEOUS MATERIALS
A. Fasteners: Self-tapping screws, bolts, nuts, self-locking rivets, self-locking bolts, and welded studs, and other suitable fasteners designed to withstand design
loads.
1. Use corrosion-resistant steel, or stainless steel fasteners for exterior applications.
2. Provide exposed fasteners with heads matching color of wall panel by means of factory-applied coating.
3. Provide metal backed neoprene washers under heads of exposed fasteners bearing on weather side of panels.
4. 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.
B. Accessories: Except as indicated as work of another specification section, provide components required for a complete wall panel system, including trim,
fascias, sills, corner units, clips, seam covers, flashing, 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 indicated or 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 elastomeric polyurethane, polysulfide, or silicone rubber sealant as recommended by the building manufacturer.
C. Bituminous Coating: Cold-applied asphalt mastic, SSPC paint 12, compounded for 15 mils dry film thickness per coat.
2.5 PANEL FABRICATION
A. General: Fabricate and finish panels and accessories at the factory to greatest extent possible, in accordance with The Metal Construction Association
standard procedures and processes, as required to fulfill indicated performance requirements demonstrated by laboratory testing. Comply with indicated profiles
and dimensional requirements and with structural requirements.
B. Fabricate panel joints with captive gaskets or factory caulking, which provide a tight seal and prevent metal-to-metal contact in a manner that will minimize
noise from movements within panel system.
PART 3 - EXECUTION
3.1 PANEL SUPPORTS AND ANCHORAGE
A. Girt, 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".
3.2 PANEL INSTALLATION
A. General 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 exposed exterior and interior fasteners, prefinished to match panel finished.
B. Accessories: Install components required for a complete wall panel system including trim, fascias, sills, corner units, clips, seam covers, battens, flashing,
sealants, gaskets, fillers, closure strips, and similar items.
C. Joint Sealers: Install gaskets, joint fillers, and sealant where indicated and where required for weather-proof performance of panels systems. Provide types of
gaskets, sealants, and fillers indicated or, if not otherwise indicated, types recommended by panel manufacturer.
D. Wall Panels: Apply elastomeric sealant continuously between metal base channel (sill angle) and concrete and elsewhere as necessary for waterproofing.
Handle and apply sealant and backup in accordance with the sealant manufacturer’s recommendations.
1. Align bottom of wall panels and fasten panels with blind rivets, bolts, or self-tapping screws. Fasten flashing and trim around openings and similar elements with
self-tapping screws.
2. Install screw fasteners with power tools having controlled torque adjusted to compress neoprene washer tightly without damage to washer, screw threads, or
panels. Install screws in predrilled holes.
3. Provide weatherproof escutcheons for pipe and conduit penetrating exterior walls.
4. 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.
E. Installation Tolerances: Installation is to be in accordance with Metal Construction Association requirements.
3.3 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
