CR# August 20, 2015

Transcription

1 SECTION METAL ROOF AND WALL PANELS PART 1 - GENERAL 1.1 SUMMARY A. Section includes: 1. Factory-formed and field-assembled, standing-seam metal roof panels. 2. Factory-formed and field-assembled, exposed-fastener, lap-seam metal wall panels. 1.2 DEFINITIONS A. Steel Sheet Thickness: Minimum thickness of base metal without metallic coatings or painted finishes. 1.3 SUBMITTALS A. Product Data: For each type of metal panel and accessory indicated. B. Shop Drawings: Show layouts of metal panels, including plans, elevations, sections, details, and attachments to other work. 1. Include details of edge conditions, joints, panel profiles, corners, anchorages, attachment system, trim, flashings, closures, and accessories. C. Samples: 3 inch (76.2 mm) by 6 inch (152.4 mm) for each exposed finish. 1.4 WARRANTY A. Warranty information for metal roof and wall panels is specified in Division 01 Section "Product Warranties." PART 2 - PRODUCTS 2.1 PANEL MATERIALS A. Metallic-Coated Steel Sheet Prepainted with Coil Coating: Steel sheet metallic coated by the hot-dip process and prepainted by the coil-coating process to comply with ASTM A 755/A 755M. 1. Aluminum-Zinc Alloy-Coated Steel Sheet: ASTM A 792/A 792M, Class AZ50 or AZ55 coating designation, Grade 40 (Class AZM150 or AZM165 coating designation, Grade 275); structural quality. METAL ROOF AND WALL PANELS

2 2. Surface: Smooth, flat finish. 3. Exposed Finishes: a. High-Performance Organic Finish: Two-coat, thermocured system with fluoropolymer coats containing not less than 70 percent polyvinylidene fluoride resin by weight; complying with physical properties and coating performance requirements of AAMA Concealed Finish: White or light-colored acrylic or polyester backer finish. B. Panel Sealants: 1. Sealant Tape: Pressure-sensitive, gray polyisobutylene compound sealant tape with release-paper backing; 1/2 inch (13 mm) wide and 1/8 inch (3 mm) thick. 2. Joint Sealant: ASTM C 920; as recommended in writing by metal wall panel manufacturer. 2.2 WALL SHEATHING A. Plywood Wall Sheathing: As specified in Division 06 Section "Miscellaneous Carpentry." 2.3 MISCELLANEOUS MATERIALS A. Fasteners for Wall Panels: Self-drilling or self-tapping, zinc-plated, hex-head carbon-steel screws, with a stainless-steel cap or zinc-aluminum-alloy head and EPDM or neoprene sealing washer with heads matching color of metal wall panels by means of plastic caps or factoryapplied coating. 2.4 LAP-SEAM METAL WALL PANELS A. Exposed-Fastener, Lap-Seam Metal Wall Panels: Factory-formed, designed to be field assembled by lapping side edges of adjacent panels and mechanically attaching panels to supports using exposed fasteners in side laps. Include accessories required for weathertight installation. 1. Products: a. ATAS International, Inc.; Belvedere Rib Panel b. CENTRIA Architectural Systems; R-Panel c. Dimensional Metals, Inc.; 7.2 Panel. d. Firestone Building Products Co.; Una-Clad VR Classic Omega e. MBCI; Div. of NCI Building Systems; "PBR" Panel f. McElroy Metal; Mega Rib or Multi Rib. g. Metal Sales Manufacturing Corporation; "R" Panel h. Petersen Aluminum Corporation; "R" Panel 2. Material: Metallic-coated steel sheet, 24 gage, inch (0.71 mm) thick. a. Exterior Finish: Fluoropolymer. METAL ROOF AND WALL PANELS

3 b. Color: As specified in Division 01 Section "Exterior Finishes and Colors." 2.5 STANDING-SEAM METAL ROOF PANELS A. Provide one of the following standing-seam metal roof panel systems: 1. Clipless, Integral-Standing-Seam Metal Roof Panels: Formed with integral ribs at panel edges and a flat pan between ribs; designed for sequential installation by mechanically attaching panels to supports using screw fasteners located under concealed side of panels and lapping and interconnecting side edges of adjacent panels. a. Products: 1) ATAS International, Inc.; Eco-Seam 2) Firestone Building Products Co.; Una-Clad UC-4 3) McElroy Metal; Meridian. 4) Metal Sales Manufacturing Company; Image II b. Material: Metallic-coated steel sheet, 24 gage, inch (0.71 mm) thick. 1) Exterior Finish: Fluoropolymer. 2) Color: As specified in division 01 Section "Exterior Finishes and Colors." c. Panel Coverage: 16 inches (406 mm) d. Panel Height: 1 inches (25 mm) to 1.75 inches (44 mm) e. Uplift Rating: UL Vertical-Rib, Snap-Joint, Standing-Seam Metal Roof Panels: Steel panel systems, complying with ASTM E 1514, factory-formed with vertical ribs at panel edges and flat pan between ribs; designed for sequential installation by mechanically attaching panels to supports using concealed clips located under one side of panels and engaging opposite edge of adjacent panels, and snapping panels together. Include clips, cleats, pressure plates, and accessories required for weathertight installation. a. Products: 1) Berridge Manufacturing Company; Cee-Lock. 2) CENTRIA Architectural Systems; SDP ) MBCI; Div. of NCI Building Systems. LokSeam. 4) McElroy Metal; Medallion Lok. 5) Metal Sales Manufacturing Corporation; Vertical Seam 6) Petersen Aluminum Corporation; Snap-Clad. 7) Firestone Building Products Co.; Una-Clad UC-14 b. Material: Metallic-coated steel sheet, 24 gage, inch (0.55 mm) thick. 1) Exterior Finish: Fluoropolymer. 2) Color: As specified in division 01 Section "Exterior Finishes and Colors." c. Panel Coverage: 16 inches (406 mm) METAL ROOF AND WALL PANELS

4 d. Panel Height: 1-1/2 inches (38 mm) to 1.75 inches (44 mm) e. Uplift Rating: UL ACCESSORIES A. Panel Accessories: Provide components required for a complete metal panel assembly including trim, copings, fasciae, mullions, sills, corner units, clips, flashings, sealants, gaskets, fillers, closure strips, and similar items. Match material and finish of metal panels, unless otherwise indicated. 1. Closures: Provide closures at eaves and rakes, fabricated of same metal as metal panels. 2. Closure Strips: Closed-cell, expanded, cellular, rubber or crosslinked, polyolefin-foam or closed-cell laminated polyethylene; minimum 1-inch- (25-mm-) thick, flexible closure strips; cut or premolded to match metal panel profile. Provide closure strips where indicated or necessary to ensure weathertight construction. B. Underlayment Materials 1. Felts: ASTM D 226, II (No. 30), asphalt-saturated organic felts 2. Self-Adhering, High-Temperature Underlayment: Self-adhering, cold-applied, sheet underlayment, a minimum of 30 mils (0.76 mm) thick, consisting of slip-resistant, polyethylene-film top surface laminated to a layer of butyl or SBS-modified asphalt adhesive, with release-paper backing. Provide primer when recommended by underlayment manufacturer. a. Product: As required by metal roof panel manufacturer to achieve special weathertightness warranty. b. Thermal Stability: Stable after testing at 240 deg F (116 deg C); ASTM D c. Low-Temperature Flexibility: Passes after testing at minus 20 deg F (29 deg C); ASTM D C. Flashing and Trim: Formed from minimum 24 gage, inch (0.71 mm) thick, metalliccoated steel sheet. Provide flashing and trim as required to seal against weather and to provide finished appearance. Locations include, but are not limited to, bases, drips, sills, jambs, corners, endwalls, framed openings, rakes, fasciae, parapet caps, soffits, reveals, and fillers. Finish flashing and trim with same finish system as adjacent metal wall panels. D. Ridge Vents: Corrosion-free, corrugated, laminated, high-density polypropylene. 1. Basis of Design Product: V-600; Cor-A-Vent, Inc. 2. Net free area: 20 sq in per lin ft (42336 sq mm/m). 3. Dimensions: 11 inches (279 mm) wide by 48 inches (1220 mm) long by 1 inch (25 mm) high. 4. Color: Black. E. Surface-Mounted, Plastic, Stop-Type Snow Guards: Clear polycarbonate stops with UV stabilizers designed for attachment to pan surface of metal roof panels using construction adhesive, silicone or polyurethane sealant, or adhesive tape. 1. Products: METAL ROOF AND WALL PANELS

5 a. Berger Bros. Co.; Real Tool CL model #RTCLSM b. Sno-Gem, Inc.; Sno-Gem. c. Snojax Inc.; Snojax 2.7 FABRICATION A. General: Fabricate and finish metal panels and accessories at the factory to greatest extent possible, by manufacturer's standard procedures and processes, as necessary to fulfill indicated performance requirements demonstrated by laboratory testing. Comply with indicated profiles and with dimensional and structural requirements. B. Sheet Metal Accessories: Fabricate flashing and trim to comply with recommendations in SMACNA's "Architectural Sheet Metal Manual" that apply to the design, dimensions, metal, and other characteristics of item indicated. C. Protect mechanical and painted finishes on exposed surfaces from damage by applying a strippable, temporary protective covering before shipping. PART 3 - EXECUTION 3.1 PREPARATION A. Install flashings and other sheet metal to comply with requirements specified in Division 7 Section "Sheet Metal Flashing and Trim." 3.2 INSTALLATION A. General: Install metal panels in orientation, sizes, and locations indicated on Drawings. 1. Field cutting of metal panels by torch is not permitted. 2. Rigidly fasten base end of metal panels and allow end free movement due to thermal expansion and contraction. Predrill panels. 3. Install screw fasteners in predrilled holes. 4. Locate panel splices over, but not attached to, structural supports. Stagger panel splices and end laps to avoid a four-panel lap splice condition. 5. Provide weatherproof escutcheons for pipe and conduit penetrating panel. B. Lap-Seam Metal Wall Panels: Fasten metal wall panels to supports with fasteners at each lapped joint at location and spacing recommended by manufacturer. 1. Arrange and nest side-lap joints so prevailing winds blow over, not into, lapped joints. Lap ribbed or fluted sheets one full rib corrugation. 2. Provide metal-backed washers under heads of exposed fasteners bearing on weather side of metal wall panels. 3. Provide sealant tape at lapped joints of metal wall panels and between panels and protruding equipment, vents, and accessories. 4. Apply a continuous ribbon of sealant tape to weather-side surface of fastenings on end laps, and on side laps of nesting-type panels; on side laps of corrugated nesting-type, METAL ROOF AND WALL PANELS

6 ribbed, or fluted panels; and elsewhere as needed to make panels weatherproof to driving rains. 5. At panel splices, nest panels with minimum 6-inch (150-mm) end lap, sealed with butylrubber sealant and fastened together by interlocking clamping plates. C. Standing-Seam Metal Roof Panels: Fasten metal roof panels to supports with concealed clips at each standing-seam joint at location, spacing, and with fasteners recommended by manufacturer. 1. Provide underlayment between metal roof panels and substrate. 2. Snap Joint: Nest standing seams and fasten together by interlocking and completely engaging factory-applied sealant. 3. Entire roof systems and related work, including gutters, flashing, fasteners, corner units, closures, clips, gaskets, sealant and accessories, as required for a complete installation, shall be in strict accordance with manufacturer s printed instructions. 3.3 CLEANING AND PROTECTION A. Remove temporary protective coverings and strippable films, if any, as metal panels are installed, unless otherwise indicated in manufacturer's written installation instructions. On completion of metal panel installation, clean finished surfaces as recommended by metal panel manufacturer. Maintain in a clean condition during construction. END OF SECTION METAL ROOF AND WALL PANELS