12443924Q0054 Specifications.pdf

Specifications

1 General Snap-together standing seam metal roof system, 24 gage thickness and 16” panel width, straited, SRI 29, and full fascia with drip edge. Color scheme is to be the same as the Cumberland Ranger District Office located at 2375 KY 801 South, Morehead, KY 40351, shown in Figure 1 and 2 below. Representative color charts are to be provided with submittal.

Figure 1: Cumberland Ranger District Office. Dark green metal roof.

Figure 2: Cumberland Ranger District Office. Dark brown fascia (Equivalent to Bahama Brown – Sherman Williams).

1.1 Requirements

Sustainable Design Requirements for related LEED general requirement

1.2 References

A. Cool Roof Rating Council (CRRC): www.coolroofs.org/productratingprogram.html: CRRC-1-2008 - CRRC Product Rating Program

B. US Environmental Protection Agency: www.energystar.gov/index.cfm: Energy Star Reflective Roof Products.

1.3 Quality Insurance

A. Manufacturer/Source: Provide metal roof panel assembly and accessories from a single manufacturer providing fixed-base roll forming, and accredited under IAS AC 472 Part B.

B. Installer Qualifications: Experienced Installer that is certified by the metal panel manufacturer.

C. Installer's Field Supervisor: Experienced mechanic that is certified by metal panel manufacturer supervising work on site whenever work is underway.

D. Buy American Compliance: Materials provided shall comply with the following requirements:

1. Buy American Act of 1933 BAA-41 U.S.C §§ 10a – 10d.

2. Buy American provisions of Section 1605 of the American Recovery and Reinvestment Act of

2009 (ARRA).

1.4 Action Submittals

Must include:

A. Product Data: Manufacturer’s data sheets for specified products.

B. Samples for Initial Selection: For each exposed product specified including sealants. Provide representative color charts.

1.5 Informational Submittals

A. Product Test Reports: Indicating compliance of products with requirements.

B. Qualification Information: For Installer firm and Installer’s field supervisor.

C. IAS Accreditation Certificate: Indicating that manufacturer is accredited under provisions of IAS AC

472.

D. Buy American Certification: Manufacturers' letters of compliance acceptable to authorities having jurisdiction, indicating that products comply with requirements.

E. Manufacturer's Warranty: Sample copy of manufacturer's standard warranty.

1.6 Closeout Submittals

A. Maintenance data.

B. Manufacturer's Warranty: Executed copy of manufacturer's standard warranty.

1.7 Delivery, Storage, and Handling

A. Protect products of metal panel system during shipping, handling, and storage to prevent staining, denting, deterioration of components or other damage. Protect panels and trim bundles during shipping.

http://www.coolroofs.org/productratingprogram.html http://www.energystar.gov/index.cfm

B. Deliver, unload, store, and erect metal panel system and accessory items without misshaping panels or exposing panels to surface damage from weather or construction operations.

C. Store in accordance with Manufacturer's written instructions. Provide wood collars for stacking and handling in the field.

1.8 Coordination

A. Coordinate sizes, profiles, and locations of roof curbs and other roof-mounted equipment and roof penetrations, based upon sizes of actual selected equipment.

1.9 Warranty

A. Special Manufacturer’s Warranty: On manufacturer’s standard form, in which manufacturer agrees to repair or replace metal panel assemblies that fail in materials and workmanship within one year from date of Completion.

B. Special Weathertightness Warranty: On manufacturer’s standard form, in which manufacturer agrees to repair or replace metal panel assemblies that fail to remain weathertight, including leaks.

C. Special Panel Finish Warranty: On Manufacturer’s standard form, in which Manufacturer agrees to repair or replace metal panels that evidence deterioration of factory-applied finish within 25 years from date of Substantial Completion, including:

1. Fluoropolymer Two- Coat System:

a. Color fading in excess of 10 Hunter units per ASTM D 2244.

b. Chalking in excess of No. 6 rating per ASTM D 4214.

c. Failure of adhesion, peeling, checking, or cracking.

2 Products

2.1 Performance Requirements

A. General: Provide metal roof panel system meeting performance requirements as determined by application of specified tests by a qualified testing facility on manufacturer's standard assemblies.

B. Recycled Content: For Steel Products: Postconsumer recycled content plus one-half of pre-consumer recycled content not less than 25 percent.

C. Radiative Property Performance:

1. Solar Reflectance Index (SRI): 29 for roof slopes greater than 2:12 under medium wind conditions, per ASTM E 1980.

2. Energy Star Qualified: Listed on US DoE ENERGY STAR Roof Products Qualified Product List.

3. Energy Performance: Listed in CRRC Rated Product Directory, with minimum properties as required by applicable Energy efficiency or High-Performance Green Building standard.

D. Structural Performance: Provide metal panel assemblies capable of withstanding the effects of indicated loads and stresses within limits and under conditions indicated:

1. Wind Loads: Determine loads based on uniform pressure, importance factor, exposure category, and basic wind speed indicated on drawings.

a. Wind Uplift Testing: Certify capacity of metal panels by actual testing of proposed assembly per ASTM E 1592.

2. Snow Loads: 15 lbf/SQFT

3. Deflection Limits: Withstand inward and outward wind-load design pressures in accordance with applicable building code with maximum deflection of 1/180 of the span with no evidence of failure.

4. Seismic Performance: Comply with ASCE 7, Section 9, "Earthquake Loads."

5. Wind Uplift Resistance: Comply with UL 580 for wind-uplift class.

6. Thermal Movements: Allow for thermal movements from variations in both ambient and internal temperatures. Accommodate movement of support structure caused by thermal expansion and contraction. Allow for deflection and design for thermal stresses caused by temperature differences from one side of the panel to the other.

7. Self-Adhering, High-Temperature Underlayment: Cold-applied sheet underlayment minimum 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 for substrate.

2.2 Metal Roof Panels

A. Mechanically seamed, Concealed Fastener, Metal Roof Panels: Structural metal roof panel consisting of formed metal sheet with vertical ribs at panel edges, installed by lapping and mechanically interlocking edges of adjacent panels, and attaching panels to supports using concealed clips and fasteners in a weathertight installation.

1. Basis of Design: MBCI, LokSeam, www.mbci.com/lokseam.html.

2. Aluminum-Zinc Alloy-Coated Steel Sheet: ASTM A 792/A 792M, structural quality, Grade 340, Coating Class AZM165 unpainted Galvalume Plus coating.

i. Nominal Coated Thickness: 24 gage

ii. Panel Surface: Smooth with striations in pan.

iii. Exterior Finish: Fluoropolymer two-coat system.

iv. Color: Dark Green (Color scheme to match Cumberland District Ranger’s Office)

3. Panel Width: 16 inches (406 mm)

4. Panel Seam Height: 1.75 inch (44.4 mm)

5. Joint Type: Snap joint-seamed.

2.3 Metal Roof Panel Accessories

E. General: Provide complete metal roof panel assembly incorporating trim, copings, fasciae, and miscellaneous flashings, in manufacturer's standard profiles. Provide required fasteners, closure strips, thermal spacers, splice plates, support plates, and sealants as indicated in manufacturer's written instructions.

F. Flashing and Trim: Match material, thickness, and finish of metal panel face sheet.

G. Panel Clips: ASTM C 645, with ASTM A 653/A 653M, G90 (Z180) hot-dip galvanized zinc coating, configured for concealment in panel joints, and identical to clips utilized in tests demonstrating compliance with performance requirements.

H. Panel Fasteners: Self-tapping screws and other acceptable corrosion-resistant fasteners recommended by roof panel manufacturer. Where exposed fasteners cannot be avoided, supply fasteners with EPDM or neoprene gaskets, with heads matching color of metal panels by means of factory-applied coating.

I. Joint Sealers: Manufacturer's standard or recommended liquid and preformed sealers and tapes, and as follows:

1. Factory-Applied Seam Sealant: Manufacturer's standard hot-melt type.

http://www.mbci.com/lokseam.html

2. Tape Sealers: Manufacturer's standard non-curing butyl tape, AAMA 809.2.

3. Concealed Joint Sealant: Non-curing butyl, AAMA 809.2.

J. Steel Sheet Miscellaneous Framing Components: ASTM C 645, with ASTM A 653/A 653M, G60 (Z180) hot-dip galvanized zinc coating.

K. Roof Accessories: Approved by metal roof panel manufacturer.

L. Snow Guards: Approved by metal roof panel manufacturer.

2.4 Fabrication

A. General: Provide factory fabricated and finished metal panels and accessories meeting performance requirements, indicated profiles, and structural requirements.

B. Fabricate metal panel joints configured to accept factory-applied sealant providing weathertight seal and preventing metal-to-metal contact and minimizing noise resulting from thermal movement.

C. Form panels in continuous lengths for full length of detailed runs.

D. Sheet Metal Flashing and Trim: Fabricate flashing and trim to comply with manufacturer's written instructions. Form from materials matching metal panel substrate and finish.

2.5 Finishes

A. Finishes, General: Prepare, pretreat, and apply coating to exposed metal surfaces to comply with coating and resin manufacturers' written instructions.

B. Fluoropolymer Two-Coat System: 0.2 – 0.3 mil primer with 0.7 - 0.8 mil 70 percent PVDF fluoropolymer color coat, AAMA 621, meeting solar reflectance index requirements.

C. Interior Finish: 0.5 mil total dry film thickness consisting of primer coat and wash coat of manufacturer's standard light-colored acrylic or polyester backer finish.

3 Execution

3.1 Examination

A. Installer to inspect panels for erection tolerances and other conditions that would adversely affect installation of metal panels.

B. Panel Support Tolerances: Confirm that panel supports are within tolerances acceptable to metal panel system manufacturer but not greater than the following:

1. 1/4 inch (6 mm) in 20 foot (6.1 m) in any direction.

2. 3/8 inch (9 mm) over any single roof plane.

C. Correct out-of-tolerance work and other deficient conditions prior to proceeding with insulated metal roof panel system installation.

3.2 Preparation

A. Miscellaneous Supports: Install subframing, girts, furring, and other miscellaneous panel support members according to ASTM C 754 and manufacturer's written instructions.

B. Self-Adhering Sheet Underlayment: Apply in accordance with underlayment manufacturer's written instructions; apply primer if required. Apply over the entire roof surface. Roll laps with roller.

C. Flashings: Provide flashings as required to complete metal roof panel system. Install in accordance with

Manufacturer’s instructions.

3.3 Metal Panel Installation

A. Snap-Joint-Seamed, Standing Seam Metal Roof Panels: Install weathertight metal panel system in accordance with manufacturer's written instructions. Install metal roof panels in orientation, sizes, and locations indicated, free of waves, warps, buckles, fastening stresses, and distortions. Anchor panels and other components securely in place. Provide for thermal and structural movement.

B. Attach panels to supports using clips, screws, fasteners, and sealants recommended by manufacturer.

1. Fasten metal panels to supports with concealed clips with spacing and fasteners recommended by manufacturer.

2. Snap Joint: Nest standing seams and fasten together by interlocking and completely engaging factory-applied sealant.

3. Provide weatherproof jacks for pipe and conduit penetrating metal panels of types recommended by manufacturer.

4. Dissimilar Materials: Where elements of metal panel system will come into contact with dissimilar materials, treat faces and edges in contact with dissimilar materials as recommended by manufacturer.

3.4 Accessory Installation

A. General: Install metal panel trim, flashing, and accessories using recommended fasteners and joint sealers, with positive anchorage to building, and with weather tight mounting. Provide for thermal expansion. Coordinate installation with flashings and other components.

1. Install components required for a complete metal panel assembly, including trim, copings, flashings, sealants, closure strips, and similar items.

2. Comply with details of assemblies utilized to establish compliance with performance requirements and manufacturer's written installation instructions.

3. Provide concealed fasteners except where noted on approved shop drawings.

4. Set units true to line and level as indicated. Install work with laps, joints, and seams that will be permanently weather resistant.

B. Joint Sealers: Install joint sealers where indicated and where required for weathertight performance of metal panel assemblies, in accordance with manufacturer's written instructions.

3.5 Cleaning and Protection

A. Remove temporary protective films immediately in accordance with metal roof panel manufacturer's instructions. Clean finished surfaces as recommended by metal roof panel manufacturer.

B. Replace damaged panels and accessories that cannot be repaired.