Exhibit A (4) - Addendum 4 Metal Roof Panels.pdf

TYAD Building 14 Renovation 100PCT0001

SECTION 07 41 13

METAL ROOF PANELS

05/11

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN ARCHITECTURAL MANUFACTURERS ASSOCIATION (AAMA)

AAMA 621 (2002) Voluntary Specifications for High Performance Organic Coatings on Coil Coated Architectural Hot Dipped Galvanized (HDG) and Zinc-Aluminum Coated Steel Substrates

AMERICAN INSTITUTE OF STEEL CONSTRUCTION (AISC)

AISC 341 (2016) Seismic Provisions for Structural Steel Buildings

AMERICAN IRON AND STEEL INSTITUTE (AISI)

AISI S100 (2012) North American Specification for the Design of Cold-Formed Steel Structural Members

AISI SG03-3 (2002; Suppl 2001-2004; R 2008) Cold-Formed Steel Design Manual Set

AMERICAN SOCIETY OF CIVIL ENGINEERS (ASCE)

ASCE 7-10 (2010; Errata 2011; Supp 1 2013) Minimum Design Loads for Buildings and Other Structures

AMERICAN WELDING SOCIETY (AWS)

AWS A5.1/A5.1M (2012) Specification for Carbon Steel Electrodes for Shielded Metal Arc Welding

AWS D1.1/D1.1M (2015; Errata 1 2015; Errata 2 2016) Structural Welding Code - Steel

ASTM INTERNATIONAL (ASTM)

ASTM A1008/A1008M (2016) Standard Specification for Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength Low-Alloy, High-Strength Low-Alloy with Improved Formability, Solution Hardened, and Bake Hardenable

ASTM A123/A123M (2017) Standard Specification for Zinc

SECTION 07 41 13 Page 1

RTA

TYAD Building 14 R enovation 100PCT0001

(Hot-Dip Galvanized) Coatings on Iron and Steel Products

ASTM A36/A36M (2014) Standard Specification for Carbon Structural Steel

ASTM A653/A653M (2017) Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process

ASTM A666 (2015) Standard Specification for Annealed or Cold-Worked Austenitic Stainless Steel Sheet, Strip, Plate and Flat Bar

ASTM A755/A755M (2016; E 2016) Standard Specification for Steel Sheet, Metallic Coated by the Hot-Dip Process and Prepainted by the Coil-Coating Process for Exterior Exposed Building Products

ASTM A792/A792M (2010) Standard Specification for Steel Sheet, 55% Aluminum-Zinc Alloy-Coated by the Hot-Dip Process

ASTM B117 (2016) Standard Practice for Operating Salt Spray (Fog) Apparatus

ASTM B221 (2014) Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes

ASTM C1289 (2017) Standard Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board

ASTM C792 (2004; R 2008) Effects of Heat Aging on Weight Loss, Cracking, and Chalking of Elastomeric Sealants

ASTM C920 (2014a) Standard Specification for Elastomeric Joint Sealants

ASTM D1056 (2014) Standard Specification for Flexible Cellular Materials - Sponge or Expanded Rubber

ASTM D1308 (2013) Effect of Household Chemicals on Clear and Pigmented Organic Finishes

ASTM D1654 (2008; R 2016; E 2017) Standard Test Method for Evaluation of Painted or Coated Specimens Subjected to Corrosive Environments

ASTM D1667 (2017) Standard Specification for Flexible Cellular Materials - Poly (Vinyl Chloride) Foam (Closed-Cell)

SECTION 07 41 13 Page 2

ASTM D2244 (2016) Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates

ASTM D2247 (2015) Testing Water Resistance of Coatings in 100% Relative Humidity

ASTM D226/D226M (2017) Standard Specification for Asphalt-Saturated Organic Felt Used in Roofing and Waterproofing

ASTM D2794 (1993; R 2010) Resistance of Organic Coatings to the Effects of Rapid Deformation (Impact)

ASTM D3359 (2017) Standard Test Methods for Rating Adhesion by Tape Test

ASTM D3363 (2005; E 2011; R 2011; E 2012) Film Hardness by Pencil Test

ASTM D4214 (2007; R 2015) Standard Test Method for Evaluating the Degree of Chalking of Exterior Paint Films

ASTM D4587 (2011) Standard Practice for Fluorescent UV-Condensation Exposures of Paint and Related Coatings

ASTM D4869/D4869M (2016a) Standard Specification for Asphalt-Saturated Organic Felt Underlayment Used in Steep Slope Roofing

ASTM D522/D522M (2014) Mandrel Bend Test of Attached Organic Coatings

ASTM D523 (2014) Standard Test Method for Specular Gloss

ASTM D5894 (2016) Standard Practice for Cyclic Salt Fog/UV Exposure of Painted Metal, (Alternating Exposures in a Fog/Dry Cabinet and a UV/Condensation Cabinet)

ASTM D610 (2008; R 2012) Evaluating Degree of Rusting on Painted Steel Surfaces

ASTM D714 (2002; R 2009) Evaluating Degree of Blistering of Paints

ASTM D822 (2013) Filtered Open-Flame Carbon-Arc Exposures of Paint and Related Coatings

ASTM D968 (2017) Standard Test Methods for Abrasion Resistance of Organic Coatings by Falling Abrasive

ASTM E1592 (2005; R 2012) Structural Performance of

SECTION 07 41 13 Page 3

Sheet Metal Roof and Siding Systems by Uniform Static Air Pressure Difference

ASTM E2140 (2001; R 2017) Standard Test Method for Water Penetration of Metal Roof Panel Systems by Static Water Pressure Head

ASTM E84 (2017) Standard Test Method for Surface Burning Characteristics of Building Materials

ASTM G152 (2013) Operating Open Flame Carbon Arc Light Apparatus for Exposure of Nonmetallic Materials

ASTM G153 (2013) Operating Enclosed Carbon Arc Light Apparatus for Exposure of Nonmetallic Materials

FM GLOBAL (FM)

FM 4471 (2010) Class I Panel Roofs

METAL BUILDING MANUFACTURERS ASSOCIATION (MBMA)

MBMA RSDM (2012) Metal Roofing Systems Design Manual

NATIONAL ROOFING CONTRACTORS ASSOCIATION (NRCA)

NRCA 0420 (2010) Architectural Metal Flashing, Condensation Control and Reroofing

NRCA RoofMan (2017) The NRCA Roofing Manual

SHEET METAL AND AIR CONDITIONING CONTRACTORS' NATIONAL ASSOCIATION

(SMACNA)

SMACNA 1793 (2012) Architectural Sheet Metal Manual, 7th Edition

SINGLE PLY ROOFING INDUSTRY (SPRI)

ANSI/SPRI/FM 4435/ES-1 (2017) Test Standard for Edge Systems Used with Low Slope Roofing Systems

UNDERWRITERS LABORATORIES (UL)

UL 580 (2006; Reprint Oct 2013) Tests for Uplift Resistance of Roof Assemblies

UL Bld Mat Dir (updated continuously online) Building Materials Directory

1.2 DESCRIPTION OF EXTERIOR METAL ROOF SYSTEM

1.2.1 Performance Requirements

Steel panels and accessory components must conform to the following standards:

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ASTM A1008/A1008M

ASTM A123/A123M

ASTM A36/A36M

ASTM A755/A755M for metallic coated steel sheet for exterior coil prepainted applications.

ASTM D522/D522M for applied coatings UL Bld Mat Dir

1.2.1.1 Hydrostatic Head Resistance

No water penetration when tested according to ASTM E2140. Submit leakage test report upon completion of installation.

1.2.1.2 Wind Uplift Resistance

Provide metal roof panel system that conform to the requirements of ASTM E1592 and UL 580 . Uplift force due to wind action governs the design for panels. Submit wind uplift test report prior to commencing installation.

Roof system and attachments must resist the wind loads as determined by ASCE 7-10 , in pounds per square foot. Metal roof panels and component materials must also comply with the requirements in FM 4471 as part of a panel roofing system as listed in Factory Mutual Guide (FMG) "Approval Guide" for class 1 or noncombustible construction, as applicable.

Identify all materials with FMG markings . Provide edge systems to meet ANSI/SPRI/FM 4435/ES-1 and FM 1-180 requirements. In accordance with ANSI/SPRI/FM 4435/ES-1 edge systems must resist a horizontal load of 58 psf @ the perimeter and 73 psf @ the corners and a vertical load of 101 psf @ the perimeter and 152 psf @ the corners.

1.3 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submittals with an "S" are for inclusion in the Sustainability eNotebook, in conformance to Section 01 33 29 SUSTAINABILITY REPORTING. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Metal Roof System Installer Sample Warranty ; G, DO

Metal Roof System Manufacturer's Finish Sample Warranty ; G, DO

Metal Roof Panel Manufacturer's Sample Warranty ; G, DO

SD-02 Shop Drawings

Flashing and Accessories ; G, RO

Exterior Roof Panels , G, RO

SD-03 Product Data

Submit manufacturer's catalog data for the following items:

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Exterior Roof Panels , G, RO

Factory-Applied Color Finish ; G, RO

Accessories ; G

Fasteners ; G

Pressure Sensitive Tape ; G

Gaskets and Sealing/Insulating Compounds ; G

Coil Stock ; G

Prepainted AlZn Coated Steel Repair Paint ; G, RO

SD-04 Samples

Exterior Roof Panels , G, RO

Factory-applied Color Finish , G, RO

Accessories ; G, RO

Fasteners ; G, RO

Gaskets and Sealant/Insulating Compounds ; G, RO

SD-05 Design Data

Wind Uplift Resistance ; G, DO

SD-06 Test Reports

Leakage Test Report ; G, RO

Wind Uplift Test Report ; G, DO

Factory Finish and Color Performance Requirements ; G

SD-07 Certificates

Exterior Roof Panels , G, RO

Coil Stock Compatibility ; G, RO

Qualification of Manufacturer ; G

Qualification of Applicator ; G, RO

SD-08 Manufacturer's Instructions

Insulation ; G, RO

Installation Manual ; G, RO

SD-09 Manufacturer's Field Reports

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Manufacturer's Field Inspection Reports ; G, RO

SD-11 Closeout Submittals

Warranties ; G, RO

Information Card ; G, RO

Regional Materials ; S

Recycled Content ; S

1.4 QUALITY ASSURANCE

1.4.1 Qualification of Manufacturer

Submit documentation verifying metal roof panel manufacturer has been in the business of manufacturing metal roof panels for a period of not less than twenty (20) years.

Manufacturer must also provide engineering services by an authorized engineer, currently licensed in the geographic area of the project, with a minimum of five (5) years experience as an engineer knowledgeable in roof wind design analysis, protocols and procedures for MBMA RSDM, ASCE 7-10 , UL 580 , and FM 4471 . Engineer must provide certified engineering calculations for the project conforming to the stated references.

1.4.1.1 Manufacturer's Technical Representative

The manufacturer's technical representative must be thoroughly familiar with the products to be installed, installation requirements and practices, and with any special considerations in the geographical area of the project. The representative must perform field inspections and attend meetings as specified.

The Manufacturer's Technical Representative shall attend the Pre-Roofing Conference, the Coordination Meeting, and to be on-site during critical aspects of the roof system installation work. The manufacturer’s Technical Representative shall provide roof inspection reports for all interim inspections and a final inspection and acceptance report upon completion of the roof installation.

1.4.1.2 Single Source

Roofing panels, clips, closures, and other accessories must be standard products of the same manufacturer, and the most recent design of the manufacturer to operate as a complete system for the intended use.

1.4.2 Qualification of Applicator

Metal roof system applicator must be approved, authorized, or licensed in writing by the roof panel manufacturer and have a minimum of three years experience as an approved, authorized, or licensed applicator with that manufacturer, approved at a level capable of providing the specified warranty. Supply the names, locations and client contact information of 5 projects of similar size and scope constructed by applicator using the manufacturer's roofing products submitted for this project within the previous three years.

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The exterior metal roof system installer shall either be approved, authorized, or licensed, in writing by the roof system manufacturer, to install twenty (20yr) year no-dollar-limit-warranty roof systems. The Installer shall also submit proof, by letter from the roof system manufacturer, that he has a minimum of ten (10yrs) years experience with that particular manufacturer installing that particular submitted roof system.

1.4.3 Field Verification

Prior to the preparation of drawings and fabrication, verify location of roof framing, roof openings and penetrations, and any other special conditions. Indicate all special conditions and measurements on final shop drawings.

1.4.4 Pre-roofing Conference

After approval of submittals and before performing roofing system installation work, hold a pre-roofing conference to review the following:

a. Drawings, specifications, and submittals related to the roof work.

Submit, as a minimum; sample profiles of roofing panels, with factory-applied color finish samples, flashing and accessories , typical fasteners and pressure sensitive tape , sample gaskets and sealant/insulating compounds . Also include data and 1/2 pint sample of Prepainted AlZn coated steel prepainted AlZn coated steel repair paint , and technical data on coil stock and coil stock compatibility , and manufacturer's installation manual . Repair paint must include an anticorrosive treatment and a PVDF barrier coat.

b. Roof system components installation;

c. Procedure for the roof manufacturer's technical representative's onsite inspection and acceptance of the roofing substrate, the name of the manufacturer's technical representatives, the frequency of the onsite visits, distribution of copies of the inspection reports from the manufacturer's technical representative;

d. Contractor's plan for coordination of the work of the various trades involved in providing the roofing system and other components secured to the roofing; and

e. Quality control plan for the roof system installation;

f. Safety requirements.

Coordinate pre-roofing conference scheduling with the Contracting Officer. Attendance is mandatory for the Contractor, the Contracting Officer's designated personnel, personnel directly responsible for the installation of metal roof system, flashing and sheet metal work, mechanical and electrical work, lightning protection sub-contractor, other trades interfacing with the roof work, and representative of the metal roofing manufacturer. Before beginning roofing work, provide a copy of meeting notes and action items to all attending parties. Note action items requiring resolution prior to start of roof work.

1.4.5 Coordination Meeting

In addition to the specification required Pre-Roofing Conference, within

SECTION 07 41 13 Page 8

45 days after contract award, the Contractor shall hold a roofing coordination meeting to establish a mutual understanding of the standing seam metal roof system contract requirements. The meeting shall take place at the building site and shall include representatives from the Contractor, including the lightning protection sub-contractor, the roof system manufacturer’s technical representative, the roofing supplier, the erector, the Contracting Officer, and the Dover AFB construction representative.

1.5 DELIVERY, HANDLING, AND STORAGE

Deliver, store, and handle panel materials, bulk roofing products, accessories, and other manufactured items in a manner to prevent damage and deformation, as recommended by the manufacturer, and as specified.

1.5.1 Delivery

Package and deliver materials to the site in undamaged condition. Provide adequate packaging to protect materials during shipment. Do not uncrate materials until ready for use, except for inspection. Immediately upon arrival of materials at jobsite, inspect materials for damage, deformation, dampness, and staining. Remove affected materials from the site and immediately replace. Remove moisture from wet materials not otherwise affected, restack and protect from further moisture exposure.

1.5.2 Handling

Handle materials in a manner to avoid damage. Select and operate material handling equipment so as not to damage materials or applied roofing.

1.5.3 Storage

Stack materials stored on site on platforms or pallets, and cover with tarpaulins or other weathertight covering which prevents trapping of water or condensation under the covering. Store roof panels so that water which may have accumulated during transit or storage will drain off. Do not store panels in contact with materials that might cause staining. Secure coverings and stored items to protect from wind displacement.

1.6 PROJECT CONDITIONS

Weather Limitations: Proceed with installation only when existing and forecast weather conditions permit metal roof panel work to be performed according to manufacturer's written instructions and warranty requirements, and specified safety requirements.

1.7 FABRICATION

Continuous length (Ridge to Eave) panels that can be shipped to the site shall be f abricate d and finish ed on a factory stationary industrial type rolling mill to the greatest extent possible, per manufacturer's standard procedures and processes, and as necessary to fulfill indicated performance requirements. Comply with indicated profiles, dimensional and structural requirements.

Provide panel profile, as indicated on drawings including major ribs and for full length of panel. Fabricate panel joints with factory installed captive gaskets providing a weather tight seal and preventing metal-to metal contact, and minimizing noise from movements within the panel

SECTION 07 41 13 Page 9 assembly.

1.7.1 Finishes

Finish quality and application processes must conform to the related standards specified within this section. Noticeable variations within the same piece are not acceptable. Variations in appearance of adjoining components are acceptable if they are within the range of approved samples and are assembled or installed to minimize any contrasting variations.

1.7.2 Accessories

Fabricate flashing and trim to comply with recommendations in SMACNA 1793 as applicable to the design, dimensions, metal, and other characteristics of the item indicated.

a. Form exposed sheet metal accessories which are free from excessive oil canning, buckling, and tool marks, and are true to line and levels indicated, with exposed edges folded back to form hems.

b. End Seams: Fabricate nonmoving seams with flat-lock seams. Form seams and seal with epoxy seam sealer.

c. Sealed Joints: Form non-expansion, but movable joints in metal to accommodate elastomeric sealant to comply with SMACNA 1793.

d. Conceal fasteners and expansion provisions where possible. Exposed fasteners are not allowed on faces of accessories exposed to view.

e. Fabricate cleats and attachments devices of size and metal thickness recommended by metal roof panel manufacturer to achieve the specified requirements including transferring fall protection and snow loads to the metal deck , but not less than the thickness of the metal being secured.

1.8 WARRANTIES

Warranties shall be written with Federal Venue, Governance and Jurisdiction. All subcontracts that delegate warranties must also be written with Federal Venue, Governance and Jurisdiction. The Federal Venue, Governance and Jurisdiction shall be the District of Delaware.

Provide metal roof system material and workmanship warranties meeting specified requirements. Provide revision or amendment to manufacturer's standard warranty as required to comply with the specified requirements.

1.8.1 Metal Roof Panel Manufacturer Warranty

Furnish the metal roof panel manufacturer's 20-year no dollar limit roof system materials and installation workmanship warranty, including flashing, insulation, components, trim, and accessories necessary for a watertight roof system construction. Make warranty directly to the Government, commencing at time of Government's acceptance of the roof work. The warranty must state that:

a. If within the warranty period, the metal roof system, as installed for its intended use in the normal climatic and environmental conditions of the facility, becomes non-watertight, shows evidence of moisture intrusion within the assembly, displaces, corrodes, perforates, SECTION 07 41 13 Page 10 separates at the seams, or shows evidence of excessive weathering due to defective materials or installation workmanship, the repair or replacement of the defective and damaged materials of the metal roof system and correction of defective workmanship is the responsibility of the metal roof panel manufacturer. All costs associated with the repair or replacement work are the responsibility of the metal roof panel manufacturer.

b. If the manufacturer or his approved applicator fail to perform the repairs within 48 hours of notification, emergency temporary repairs performed by others does not void the warranty.

Submit Metal Roof Panel Manufacturer's Sample Warranty prior to beginning mobilization.

1.8.2 Manufacturer's Finish Warranty

Provide a manufacturer's no-dollar-limit 20 year finish warranty for the roofing panel finish including fasteners and cap . Issue the warranty directly to the Government at the date of Government acceptance warranting that the factory color finish, under normal atmospheric conditions at the site, will not crack, peel, or delaminate; chalk in excess of a numerical rating of 8 when measured in accordance with ASTM D4214; or fade or change colors in excess of 5 NBS units as measured in accordance with ASTM D2244.

Submit Metal Roof System Manufacturer's Finish Sample Warranty prior to beginning mobilization.

1.8.3 Metal Roof System Installer Warranty

Provide the "Contractors Five 5) Year No Penal Sum Warranty for Non-Structural Metal Roof System" attached at the end of this section.

Provide a separate bond in an amount equal to the installed total material and installation roofing system cost in favor of the Government covering the installer's warranty responsibilities effective throughout the five 5) year warranty period.

Submit Metal Roof System Installer Sample Warranty prior to beginning mobilization.

1.8.4 Continuance of Warranty

Repair or replacement work that becomes necessary within the warranty period must be approved, as required, and accomplished in a manner so as to restore the integrity of the roof system assembly and validity of the metal roof system manufacturer warranty for the remainder of the manufacturer warranty period.

1.9 CONFORMANCE AND COMPATIBILITY

The entire exterior metal roofing and flashing system must be in accordance with specified and indicated requirements, including wind resistance per ASCE 7-10 and seismic per AISC 341 requirements. Work not specifically addressed and any deviation from specified requirements must be in general accordance with recommendations of the NRCA RoofMan, the metal panel manufacturer's published recommendations and details, and compatible with surrounding components and construction. Submit any deviation from specified or indicated requirements to the Contracting Officer for approval prior to installation.

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PART 2 PRODUCTS

2.1 PRODUCT SUSTAINABILITY CRITERIA

Where allowed by performance criteria:

2.1.1 Regional Materials

Provide products extracted, harvested, or recovered, as well as manufactured, locally, if available, and provide documentation in accordance with Section 01 33 29 SUSTAINABILITY REPORTING.

2.1.2 Recycled Content

Provide products with recycled content and provide documentation in accordance with Section 01 33 29 SUSTAINABILITY REPORTING.

2.2 EXTERIOR ROOF PANELS

Provide metal roof panels of the materials, thicknesses and finishes specified to meet the performance requirements indicated that do not require sequential installation. Provide panels that and may be replaced individually without damage to adjacent panels. The exterior panel basis of design listed

Exterior Steel panels, minimum uncoated thickness of 24-gauge except when mid field of roof is subject to design wind uplift pressures of 60 psf or greater the entire roof system shall have a minimum uncoated thickness of 22-gauge, with coating of aluminum-zinc alloy conforming to ASTM A792/A792M and AISI SG03-3 in an application weight of 0.50 oz. minimum per sq. ft.

for material (AZ50). Factory applied coil coating conforming to ASTM A755/A755M shall meet the requirements of AAMA 621, fluoropolymer finish containing minimum 70 percent PVDF resins, three coat system with minimum 1-1.15 mil dry film thickness consisting of 0.2-0.25 mil prime coat and 0.8-0.9 mil finish coat minimum applied by the continuous coil coating method. Paint resin, with noted exceptions, must containing 100% inorganic pigments in manufacturer’s standard color which best matches Tobyhanna Army Depot Standards and meeting the performance requirements specified.

Acceptable Manufacturer Products;

Manufacturer products listed in this specification are referenced to establish a standard of quality. When the specific product listed is submitted by the Contractor that submittal will be considered 'For Information Only'. When an equal to that named in this specification is submitted, it shall be 'For Government Approval' (G).

Exterior Standing Seam Metal Roof Panels

Exterior Panel Basis of Design http://www.mcelroymetal.com/content/products/display.cfm?product_id=64 McElroy Metals 238T 1020 Veterans Street Mauston, WI 53948 Phone: (608) 847-6778 Fax: (608) 847-3985

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Similar Products

Centria SRS 3 http://www.centriaperformance.com/ products/roof/structural_standing_seam_metal_roofs/products/srs3.aspx 1005 Beaver Grade Road Moon Township, PA 15108

(800) 759-7474

IMETCO Series 300 http://imetco.com/products/roof/series-300/ 2070 Steel Drive Tucker, GA 30084-5832

(800) 646-3826 www.imetco.com

TREMCO Tremlock T-238 3735 Green Road Beachwood, OH 44122

(800) 852-9068 Fax Number: (216) 292-5167

Snow Retention Systems

Alpine SnowGuards Pipe P.O. Box 430 Stowe, VT 05672-0432

(888) 766-4273 www.alpinesnowguards.com

McIlroy Metals Distributor S-5T Snowrail 1020 Veterans Street Mauston, WI 53948 Phone: (608) 847-6778 Fax: (608) 847-3985

LMCurbs SnoRail P.O. Box 5299 609 Fisher Road Longview, Texas 75604

(800) 284-1412 www.lmcurbs.com

Snobar SnoBar 12656 E. Jameson Place Englewood, CO 80112

(800) 711-9724 www.snobar.com

Aluminum-Zinc alloy coated steel sheet conforming to ASTM A792/A792M and AISI SG03-3 .

Individual panels to have continuous length sufficient to cover the entire length of any unbroken roof slope with no joints or seams and formed without warping, waviness, or ripples that are not a part of the panel profile and free from damage to the finish coating system.

Provide panels with thermal expansion and contraction consistent with

SECTION 07 41 13 Page 13 the type of system specified, and the following profile:

P rofile to be a 2 -3/8 or 3 inch high T profile symmetrical mechanically seamed standing seam, 16 inch coverage with mechanical crimping seams with concealed clips and fasteners.

2.3 FACTORY FINISH AND COLOR PERFORMANCE REQUIREMENTS

All panels are to receive a factory applied polyvinylidene fluoride finish consisting of a baked topcoat with a manufacturer's recommended prime coat conforming to the following:

a. Metal Preparation: All metal is to have the surfaces carefully prepared for painting on a continuous process coil coating line by alkali cleaning, hot water rinsing, application of chemical conversion coating, cold water rinsing, sealing with an acid rinse, and thorough drying.

b. Prime Coating: A base coat of epoxy or urethane paint, specifically formulated to interact with the top-coat, is to be applied to the prepared surfaces by roll coating to a dry film thickness of 0.20 plus

0.05 mils. The prime coat must be oven cured prior to application of the finish coat.

c. Exterior Finish Coating: Apply the exterior finish coating over the primer by roll coating to a dry film thickness of 0.80 plus 0.05 mils for a total dry film thickness of 1.00 plus 0.10 mils. This exterior finish coat must be oven-cured.

d. Interior finish coating: Apply a wash coat on the reverse side over primer by roll coating to a dry film thickness of 0.30 plus 0.05 mils for a total dry fill thickness of 0.50 plus 0.10 mils. The wash coat must be oven cured.

e. Color: The exterior finish chosen from the manufacturer's standard color chart.

f. Physical Properties: Coating must conform to the industry and manufacturer's standard performance criteria as listed by the following certified test reports:

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General: ASTM D5894 and ASTM D4587

Abrasion: ASTM D968

Adhesion: ASTM D3359

Chalking: ASTM D4214

Chemical Pollution: ASTM D1308

Color Change and Conformity: ASTM D2244

Creepage: ASTM D1654

Cyclic Corrosion Test: ASTM D5894

Flame Spread: ASTM E84

Flexibility: ASTM D522/D522M

Formability: ASTM D522/D522M

Gloss at 60 and 85 degrees: ASTM D523

Humidity: ASTM D2247 and ASTM D714

Oxidation: ASTM D610

Pencil Hardness: ASTM D3363

Reverse Impact: ASTM D2794

Salt Spray: ASTM B117

Weatherometer: ASTM G152, ASTM G153 and ASTM D822

2.3.1 Specular Gloss

Finished roof surfaces to have a specular gloss value of 10 or less at an angle of 85 degrees when measured in accordance with ASTM D523.

2.4 MISCELLANEOUS METAL FRAMING

2.4.1 General

Provide cold formed metallic-coated steel sheet conforming to ASTM A792/A792M or ASTM A653/A653M , AISI S100 , and as specified in 05 40 00 COLD-FORMED METAL FRAMING unless otherwise indicated.

2.4.2 Fasteners and Miscellaneous Metal Framing

Provide compatible type, corrosion resistant, of sufficient size and length to penetrate the supporting element a minimum of one inch with

SECTION 07 41 13 Page 15 other required properties to fasten miscellaneous metal framing members to substrates in accordance with the roof panel manufacturer's and ASCE 7-10 requirements.

2.4.2.1 Exposed Fasteners

Fasteners for roof panels must be corrosion resistant coated steel, compatible with the sheet panel or flashing material and of the type and size recommended by the manufacturer to meet the performance requirements and design loads. Fasteners for accessories must be the manufacturer's standard. Provide an integral metal washer, matching the color of attached material with compressible sealing EPDM gasket approximately 3/32 inch thick for exposed fasteners.

2.4.2.2 Screws

Provide corrosion resistant screws, coated steel of the type and size recommended by the manufacturer to meet the performance requirements.

2.4.2.3 Rivets

Provide closed-end type rivets, corrosion resistant coated steel where watertight connections are required.

2.4.2.4 Attachment Clips

Provide hot-dip galvanized, conforming to ASTM A653/A653M , clips. Size, shape, thickness and capacity must meet the thickness and design load criteria specified.

2.4.3 Electrodes for Manual, Shielded Metal Arc Welding

Electrodes for manual, shielded metal arc welding must meet the requirements of AWS D1.1/D1.1M , and be covered, mild-steel electrodes conforming to AWS A5.1/A5.1M .

2.5 ACCESSORIES

Accessories must be compatible with the metal roof panels. Sheet metal flashing, trim, metal closure strips, caps, and similar metal accessories must be not less than the minimum thicknesses specified for roof panels.

Provide exposed metal accessories to match the panels furnished. Molded foam rib, ridge and other closure strips must be closed-cell or solid-cell synthetic rubber or neoprene premolded to match configuration of the panels and not absorb or retain water.

2.5.1 Pre-manufactured Accessories

Pre-manufactured accessories must be manufacturer's standard for intended purpose, comply with applicable specification section, compatible with the metal roof system and approved for use by the metal roof panel manufacturer. Construct curbs to match roof slope.

2.5.2 Metal Closure Strips

Provide factory fabricated prepainted aluminum zinc coated steel closure strips of the same gauge, color, finish and profile as the specified roof panel.

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2.5.3 Rubber Closure Strips

Provide closed-cell, expanded cellular rubber closure strips conforming to ASTM D1056 and ASTM D1667, extruded or molded to the configuration of the specified roof panel profile and in lengths supplied by roof panel manufacturer.

2.6 JOINT SEALANTS

2.6.1 Sealants

Sealants are to be an approved gun type for use in hand or air pressure caulking guns at temperatures above 40 degrees F (or frost-free application at temperatures above 10 degrees F ) with a minimum solid content of 85 percent of the total volume. Sealant must dry with a tough, durable surface skin which permits it to remain soft and pliable underneath, providing a weather tight joint. No migratory staining, in conformance with to ASTM C792, is permitted on painted or unpainted metal, stone, glass, vinyl or wood.

Prime all joints to receive sealants with a compatible one-component or two-component primer as recommended by the roof panel manufacturer.

2.6.1.1 Shop Applied Sealants

Shop-applied sealant must be non-curing, non-skinning, butyl tape or tube sealant as supplied by manufacturer for concealed applications.

2.6.1.2 Field Applied Sealants

Field-applied sealants must be manufacture approved, gun grade, non-sag neutral cured silicone, polysulfide or polyurethane with an initial maximum Shore A durometer hardness of 25, conforming to ASTM C920, Type II. Color to match panel color.

2.6.1.3 Tape Sealants

Provide pressure sensitive, 100 percent solid tape sealant with a release paper backing; permanently elastic, non-sagging, non-toxic and non-staining as approved by the roof panel manufacturer.

2.6.2 Sheet Metal Flashing and Trim

2.6.2.1 Fabrication, General

Custom fabricate sheet metal flashing and trim to comply with recommendations within the SMACNA 1793 that apply to design, dimensions, metal type, and other characteristics of design indicated. Shop fabricate items to the greatest extent possible. Obtain and verify field measurements for accurate fit prior to shop fabrication. Fabricate flashing and trim without excessive oil canning, buckling, and tool marks, true to line and levels indicated, with exposed edges folded back to form hems.

2.7 INSULATION

Insulation, facer material and attachment must be compatible with metal roof system specified, as approved by the roof panel manufacturer, and conform to ASTM C1289 ( Faced Rigid Cellular Polyisocyanurate ).

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AMENDMENT: "a"

2.8 UNDERLAYMENTS

2.8.1 Felt Underlayment

Provide No. 30 asphalt-saturated organic , non-perforated felt underlayment in compliance with ASTM D226/D226M, Type II, or ASTM D4869/D4869M at metal panels installed over plywood sheathing .

AMENDMENT: "a"

2.9 GASKETS AND SEALING/INSULATING COMPOUNDS

Gaskets and sealing/insulating compounds must be nonabsorptive and suitable for insulating contact points of incompatible materials.

Sealing/insulating compounds must be non-running after drying.

2.10 FINISH REPAIR MATERIAL

Only use repair and touch-up paint supplied by the roof panel manufacturer and is compatible with the specified system.

2.11 EQUIPMENT

2.11.1 Snow Retention System

The snow retention system shall clamp to the standing seam of the metal roof panel using high strength stainless steel fittings that will not penetrate the seam. The retention system consists of aluminum pipes that prevent the sudden movement of snow and ice. Protection from galvanic reactions between dissimilar metals will be designed into the system. The system will not rotate, twist, or spin within their brackets. The system shall match the metal roof panels in color and finish. Attachment with through panel fasteners is not acceptable.

Materials

Stainless steel: ASTM A666, Type 316 Aluminum: ASTM B221, 6000 series alloy

Delegated Design: Prepare system layout, design analysis, and calculations certified by a Licensed Professional Engineer.

System components must be anticorrosive and galvanically compatible with the prepainted AlZn coated steel roof panels. The components must be as required to not discolor the PVDF coated roof panels.

Clamps: Manufacturer’s standard non-penetrative clamps enabling the system to be fitted to standing seam roof system.

Welding rods and bare electrodes: Select according to AWS specifications for aluminum alloy welded.

Aluminum Tubing: ASTM B221, 6000 series alloy, 1" outside diameter and

0.120 wall thickness.

Fasteners: All fasteners including set screws must be stainless steel, aluminum or manufacturer recommended ceramic coated steel. Galvanized

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TYAD Building 14 Renovation 100OPCT0001 steel fasteners are not acceptable.

Custom finish all components to match the roof panels in color sheen with finishes with longevity equal to that of the roof panel finish.

PART 3 EXECUTION

3.1 EXAMINATION

Examine substrates, areas, and conditions, with installer present, for compliance with requirements for installation tolerances, metal roof panel supports, and other conditions affecting performance of the work. Ensure surfaces are suitable, dry and free of defects and projections which might affect the installation.

Examine primary and secondary roof framing to verify that rafters, roof deck , ang les , channels, and other structural support members for panels and anchorages have been installed within alignment tolerances required by metal roof panel manufacturer, UL, ASTM, and ASCE 7-10 and applicable seismic requirements.

Examine solid roof sheathing to verify that sheathing joints are supported by framing or blocking; and that installation is within flatness tolerances required by metal roof panel manufacturer.

Examine rough-in for components and systems penetrating metal roof panels to verify actual locations of penetrations relative to seam locations of panels prior to installation.

Submit a written report to the Contracting Officer, endorsed by the installer, listing conditions detrimental to the performance of the work.

Proceed with installation only after defects have been corrected.

3.2 INSTALLATION

Installation must meet specified requirements and be in accordance with the manufacturer's installation instructions and approved shop drawings.

Do not install damaged materials. Dissimilar materials which are not compatible when contacting each other must be insulated by means of gaskets or sealing/insulating compounds. Keep all exposed surfaces and edges clean and free from sealant, metal cuttings, hazardous burrs, and other foreign material. Remove stained, discolored, or damaged materials from the site.

3.2.1 Preparation

Clean all substrate substances which may be harmful to insulation,and roof panels including removing projections capable of interfering with with insulation, and roof panel attachment.

Install sub-purlins, eave angles, furring, and other miscellaneous roof panel support members and anchorage according to metal roof panel manufacturer's written instructions.

3.3 INSULATION INSTALLATION

Install insulation concurrently with metal roof panel installation, in thickness indicated, to cover entire roof, according to manufacturer's written instructions.

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3.4 PROTECTION OF APPLIED MATERIALS

Do not permit storing, walking, wheeling, and trucking directly on applied roofing/insulation materials. Provide temporary walkways, runways, and platforms of smooth clean boards or planks as necessary to avoid damage to applied roofing/insulation materials, and to distribute weight to conform to indicated live load limits of roof construction.

3.5 FASTENER INSTALLATION

Anchor metal roof panels and other components of the Work securely in place, using approved fasteners according to manufacturer's written instructions.

3.6 FLASHING, TRIM, AND CLOSURE INSTALLATION

3.6.1 General Requirements

Comply with performance requirements, manufacturer's written installation instructions, and SMACNA 1793. Provide concealed fasteners where possible. Set units true to line and level as indicated. Install work with laps, joints, and seams that will be permanently water tight and weather resistant. Work is to be accomplished to form weather tight construction without waves, warps, buckles, fastening stresses or distortion, and to allow for expansion and contraction. Cutting, fitting, drilling, and other operations in connection with sheet metal required to accomplish the work must conform to the manufacturers written instructions.

3.6.2 Metal Flashing

Install exposed metal flashing at building corners, rakes, eaves, junctions between metal siding and roofing, valleys and changes off slope or direction in metal roofing, and building expansion joints.

Exposed metal flashing must be the same material, color, and finish as the specified metal roofing panels. Furnish flashing in minimum 8 foot lengths. Exposed flashing must have 1 inch locked and sealed end joints, with expansion joints at intervals of no greater than 16 feet .

Fasten flashing at not more than 8 inches on center for roofs, except where flashing is held in place by the same screws used to secure panels.

Exposed flashing and flashing subject to rain penetration must be bedded in specified joint sealant. Flashing which is contact with dissimilar metals must be isolated by means of the specified asphalt mastic material to prevent electrolytic deterioration.

Form drips to the profile indicated, with the edge folded back 1/2 inch to form a reinforced drip edge.

3.7 ROOF PANEL INSTALLATION

Provide metal roof panels of full length from eave to ridge or eave to wall as indicated, unless otherwise indicated or restricted by shipping limitations. Anchor metal roof panels or other components of the Work securely in place, with provisions for thermal and structural movement in accordance with NRCA 0420.

Steel Roof Panels: Use stainless steel fasteners for exterior surfaces and galvanized fasteners for unexposed surfaces.

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Anchor Clips: Anchor metal roof panels and other components of the Work securely in place, using approved fasteners according to manufacturer's written instructions. Provide all blocking and nailers as required.

Metal Protection: Where dissimilar metals contact each other or possibly corrosive substrates, protect against galvanic action by applying rubberized asphalt underlayment to each contact surface unless otherwise recommended by the metal roof panel manufacturer.

Joint Sealers: Install gaskets, joint fillers, and sealants where indicated and required for weatherproof performance of metal roof panel system. Provide types of gaskets, fillers, and sealants indicated or, if not indicated, types recommended by metal roof panel manufacturer. Where indicated joint sealers differ from those required or recommended by the roofing system manufacturer.

3.7.1 Handling and Erection

Erect roofing system in accordance with the approved erection drawings, printed instructions and safety precautions of the manufacturer.

Do not subject panels to overloading, abuse, or undue impact. Do not apply bent, chipped, or defective panels. Damaged panels must be replaced and removed from the site at the contractors expense. Erect panels true, plumb, and in exact alignment with the horizontal and vertical edges of the building, securely anchored, and with indicated rake, eave, and curb overhang. Allow for thermal movement of the roofing, movement of the building structure, and provide permanent freedom from noise due to wind pressure.

Do not permit storage, walking, wheeling or trucking directly on applied roofing materials. Provide temporary walkways, runways, and platforms of smooth clean boards or planks as necessary to avoid damage to the installed roofing materials, and to distribute weight to conform to the indicated live load limits of the roof construction.

Roof panels must be laid with corrugations in the direction of the roof slope. End laps of exterior roofing must not be less than 8 inches ; side laps of standard exterior corrugated panels must not be less than 2-1/2 corrugations.

Field cutting of metal roof panels by torch is not permitted. Field cut only as recommended by manufacturer's written instructions.

3.7.2 Closure Strips

Install metal closure strips at open ends of metal ridge rolls; open ends of corrugated or ribbed pattern roofs, and at intersection of wall and roof, unless open ends are concealed with formed eave flashing; rake of metal roof unless open end has a formed flashing member; and in other required areas.

Install closure strips at intersection of the wall with metal roofing; top and bottom of metal siding; heads of wall openings; and in other required locations.

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3.7.3 Workmanship

Make lines, arises, and angles sharp and true. Free exposed surfaces from any visible wave, warp, buckle and tool marks. Fold back exposed edges neatly to form a 1/2 inch hem on the concealed side. Make sheet metal exposed to the weather watertight with provisions for expansion and contraction.

Make surfaces to receive sheet metal plumb and true, clean, even, smooth, dry, and free of defects and projections which might affect the application. For installation of items not shown in detail or not covered by specifications conform to the applicable requirements of SMACNA 1793.

Provide sheet metal flashing in the angles formed where roof decks abut walls, curbs, ventilators, pipes, or other vertical surfaces and wherever indicated and as necessary to make the work watertight.

3.8 ACCEPTANCE PROVISIONS

3.8.1 Erection Tolerances

Erect metal roofing straight and true with plumb vertical lines correctly lapped and secured in accordance with the manufacturer's written instructions. Shim and align metal panel units within installed tolerance of 1/4 inch in 20 feet on slope and location lines as indicated and within 1/8-inch offset of adjoining faces and of alignment of matching profiles .

3.8.2 Leakage Tests

Finished application of metal roofing is to be subject to inspection and test for leakage by the Contracting Officer or his designated representative, and Architect/Engineer. Inspection and tests will be conducted without cost to the Government.

Inspection and testing is to be made promptly after erection to permit correction of defects and removal/replacement of defective materials.

3.8.3 Repairs to Finish

Scratches, abrasions, and minor surface defects of finish may be repaired with the specified repair materials and as recommended by the metal roof panel manufacturer. Finished repaired surfaces must be uniform and free from variations of color and surface texture. Repaired metal surfaces that are not acceptable to the project requirements are to be immediately removed and replaced with new material.

3.8.4 Paint Finished Metal Roofing

Paint finished metal roofing will be tested for color stability by the Contracting Officer during the manufacturer's specified guarantee period.

Panels that indicate color changes, fading, or surface degradation, determined by visual examination, must be removed and replaced with new panels at no expense to the Government. New panels will be subject to the specified tests for an additional year from the date of their installation.

3.9 CLEAN UP AND DISPOSAL

Clean exposed sheet metal work at completion of installation. Remove metal shavings, filings, nails, bolts, and wires from roofs. Remove grease and oil films, excess sealants, handling marks, contamination from

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Exposed metal surfaces must be free of dents, creases, waves, scratch marks, solder or weld marks, and damage to the finish coating. Touch up scratches in panel finish with manufacturer supplied touch-up paint system to match panel finish. Treat exposed cut edges with manufacturer supplied color coat.

Collect all scrap/waste materials and place in containers at the end of each day . Promptly dispose of demolished and scrap materials. Do not allow scrap/waste materials to accumulate on-site; transport immediately from the government property and legally dispose of them.

3.10 FIELD QUALITY CONTROL

3.10.1 Manufacturer's Inspection

Manufacturer's technical representative must visit the site a minimum of three times during the installation for purposes of reviewing materials installation practices and adequacy of work in place. Make inspections during the first 20 squares of roof panel installation, at mid-point of the installation, and at substantial completion, at a minimum. Additional inspections are required for each 100 squares of total roof area with the exception that follow-up inspections of previously noted deficiencies or application errors must be performed as requested by the Contracting Officer. After each inspection, submit a report, signed by the manufacturer's technical representative to the Contracting Officer within 3 working days. Note in the report overall quality of work, deficiencies and any other concerns, and recommended corrective action.

Submit three signed copies of the manufacturer's field inspection reports to the Contracting Officer within one week of substantial completion.

3.11 INFORMATION CARD

For each roof, furnish a typewritten information card for facility records and a card laminated in plastic and framed for interior display at roof access point, or a photoengraved 0.032 inch thick aluminum card for exterior display.

Make card 8 1/2 by 11 inches minimum. Information card must identify facility name and number; location; contract number; approximate roof area; detailed roof system description, including deck type, roof panel manufacturer and product name, type underlayment(s), date of completion;

installing contractor identification and contact information; manufacturer warranty expiration, warranty reference number, and contact information.

Install card at location as directed by the Contracting Officer and provide a paper copy to the Contracting Officer.

3.12 USACE WARRANTY

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CONTRACTOR'S TWENTY (20) YEAR NO PENAL SUM WARRANTY

FOR

NON-STRUCTURAL METAL ROOF SYSTEM

FACILITY DESCRIPTION_________________________________________________

BUILDING NUMBER:_____________________________________________________

CORPS OF ENGINEERS CONTRACT NUMBER:__________________________________

CONTRACTOR

CONTRACTOR:__________________________________________________________

ADDRESS:_____________________________________________________________

POINT OF CONTACT:____________________________________________________

TELEPHONE NUMBER:____________________________________________________

OWNER

OWNER:___________________________________________________…