2.Specifications.pdf

BUILDING 1363 REPLACE DAMAGED ROOF MOUNTAIN HOME AIR FORCE BASE

WORK ORDER 36877

Section 01 11 00 – Summary of Work 1 | 1

SECTION 01 11 00 – Summary of Work

1.0 WORK COVERED BY CONTRACT DOCUMENTS

Project Description

This work includes the removal and replacement of standing seam metal roof sections and additional roof items on the east side of Building 1363 as directed in the Statement of Work and attached drawing. The contractor will also inspect the remaining roof sections for loose and missing screws. The contractor has the option to take all materials to be removed and disposed of to the Recycle Center or transport off-base for disposal in a landfill.

1.1 Location

Building 1363 is located on Mountain Home Air Force Base, Idaho.

1.2 Contract Drawings

The drawing of the roof of Building 1363 with details and instructions associated are provided to the contractor for reference only. The contractor shall be responsible for measuring actual elevations and dimensions in the field, and for verifying the accuracy of details shown on each drawing.

1.3 Work Scheduling

Normal duty hours for work are from 7:00 a.m. to 5:00 p.m., Monday through Friday.

Requests for additional work requires written approval from the Contracting Officer seven (7) days in advance of the proposed work period.

1.4 Occupancy of Premises

Building 1363 will be occupied during performance of work. Contractor shall meet with Contracting Officer, Program Manager, and Building 1363 Facility Manager during kickoff meeting and as necessary to coordinate work activities. Before work is started, arrange with the Contracting Officer a sequence of procedure for access to and from the roof structure, for the contractor’s laydown area for storage of materials and equipment, and other work related activities.

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BUILDING 1363 ROOF REPAIR MOUNTAIN HOME AIR FORCE BASE

WORK ORDER - 36877

Section 07 41 63 – Fabricated Roof Panel Assemblies 1 |13

SECTION 07 41 63 - Fabricated Roof Panel Assemblies

PART 1 GENERAL

1.1 REFERENCES

FM 4471 (2010) Class I Panel Roofs

METAL BUILDING MANUFACTURERS ASSOCIATION (MBMA)

MBMA RSDM (2000) Metal Roofing Systems Design Manual

1.2 SUBMITTALS

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

submittals not having a "G" designation are for information only.

SD-01 Preconstruction Submittals

Qualification of Manufacturer; (G)

Qualification of Installer; (G)

SD-02 Shop Drawings

Roofing Panels; (G) Flashing and Accessories; (G) Gutter/Downspout Assembly; (G) Panel fastening detail; (G)

SD-03 Product Data

Factory Color Finish; (G) Sealants and Caulking; (G) Accessories; (G)

SD-04 Samples

Roofing Panels; (G) Fasteners; (G) Metal Closure Strips; (G) Manufacturer's Color Charts and Chips; (G)

SD-08 Manufacturer's Instructions

Assemblies 2 |13

Installation of Roof Panel Assemblies

SD-11 Closeout Submittals

Warranty Information Form and Placard; (G) Manufacturer's Field Inspection Reports Application Instructions Date of Installation Wall-Mounted Placard; (G) 20-year "No-Dollar-Limit" Weathertight Warranty: (G)

1.4 QUALITY CONTROL

1.4.1 Qualification of Manufacturer

Guarantee the metal roof panel system manufacturer possesses the following:

a. A minimum of five years of experience in manufacturing metal roof system and accessory products.

1.4.2 Qualification of Installation Contractor

Confirm that the installation contractor is approved and certified by the roofing panel manufacturer before installing the metal roofing system.

1.5 DELIVERY, STORAGE, AND HANDLING

Deliver components, sheets, metal roof panels, and other manufactured items, handling them in a manner to prevent damage or deformation; package metal roof panels for protection during transportation and handling.

Unload, store, and erect metal roof panels in a manner to prevent bending, warping, twisting, and surface damage.

Stack metal roof panels on platforms or pallets, covered with a suitable weather-tight and ventilated covering; store metal roof panels to ensure dryness.

1.6 PROJECT/SITE CONDITIONS

Weather Limitations: Proceed with installation only when existing and forecasted weather conditions permit metal roof panel work to be performed according to the manufacturer's written instructions and warranty requirements. Field Measurements: Verify the actual dimensions of construction contiguous with metal roof panels by field measurements before fabrication.

1.7 WARRANTY

Assemblies 3 |13

Provide a manufacturer's 20-year Watertight warranty for the roof section being replaced.

Warranty shall include manufacturer’s listed requirements for the warranty to remain intact, including required inspections. The watertight roof system warranty shall include all roof penetrations, flashing, and all joints between the section of roof being replaced and the existing roof. Roof must be installed by an approved roof installer and installed according to manufacturer’s requirements. Signatures on Watertight warranty must be from the roof System manufacturer and the Government, and not from the General Contractor. Warranty shall not be Pro-rated.

PART 2 PRODUCTS

2.1 SYSTEM DESCRIPTION

2.2 FABRICATION

2.2.1 Fabrication

Fabricate and finish metal roof panels and accessories at the factory to the greatest extent possible, using the manufacturer's standard procedures and processes to fulfill the indicated performance requirements. Comply with indicated profiles, and dimensional and structural requirements conforming to AISI D100.

Provide a panel profile, including major ribs and intermediate stiffening ribs, if any, for the full length of panel.

Fabricate metal roof panel side laps with factory-installed captive gaskets or separator strips that provide a tight seal and prevent metal-to-metal contact, in a manner that will seal weather-tight and minimize noise from movements within the panel assembly.

Sheet Metal Accessories: Fabricate flashing and trim to comply with recommendations in SMACNA 1793 that apply to the design, dimensions, metal, and other characteristics of the item indicated.

Form exposed sheet metal accessories without excessive oil canning, buckling, and tool marks, and true to the line and levels indicated, with exposed edges folded back to form hems.

End Seams: Fabricate nonmoving seams with flat-lock seams. Form seams and seal with epoxy seam sealer. Rivet joints for additional strength.

Sealed Joints: Form nonexpansion but movable joints in metal to accommodate elastomeric sealant, compliant with SMACNA 1793.

Assemblies 4 |13

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

Fabricate cleats and attachment devices of the size and metal thickness recommended by SMACNA 1793 or by the metal roof panel manufacturer for application, but not less than the thickness of the metal being secured.

2.2.2 Sheet Metal Flashing and Trim

2.2.2.1 Fabrication, General

Custom-fabricate sheet metal flashing and trim to comply with the recommendations in SMACNA 1793 that apply to the design, dimensions, metal, and other characteristics of the items indicated. Shop-fabricate items where practicable. Obtain field measurements for an accurate fit before shop fabrication.

2.2.2.2 Roof Drainage Sheet Metal Fabrications

Fabricate gutters to the cross section indicated, with riveted and soldered joints, complete with end pieces, outlet tubes, and other special accessories as required. Fabricate in 243.8 cm 96-inch long sections at a minimum. Fabricate expansion joints and accessories from the same metal as the gutters, unless otherwise indicated.

Fabricate rectangular downspouts complete with mitered elbows. Furnish with metal hangers, fabricated from the same material as the downspouts and anchors.

2.2.3 Finishes

Comply with NAAMM AMP 500 for recommendations for applying and designating finishes.

Appearance of Finished Work: Ensure that there are no noticeable variations in finish on the same piece. Variations in the appearance of adjoining components are acceptable if they are within the range of approved samples and are assembled or installed to minimize contrast.

2.3 COMPONENTS

2.3.1 Miscellaneous Metal Framing

2.3.1.1 General

Provide cold-formed metallic-coated steel sheet conforming to AISI D100 and

Assemblies 5 |13

ASTM A653/A653M and specified in Section 05 40 00 COLD-FORMED METAL FRAMING unless otherwise indicated.

2.3.1.2 Fasteners for Miscellaneous Metal Framing

Provide fasteners of a type, material, corrosion resistance, size, and sufficient length to penetrate the supporting member a minimum of 2.54 cm 1 inch and possessing the other properties required to fasten miscellaneous metal framing members to substrates in accordance with the roof-panel manufacturer's and ASCE 7 requirements.

2.3.2 Fasteners

2.3.2.1 General

Provide fasteners of a type, material, corrosion resistance, size, and sufficient length to penetrate the supporting member a minimum of 2.54 cm 1 inch and possessing the other properties required to fasten miscellaneous metal framing members to substrates in accordance with the roof-panel manufacturer's and ASCE 7 requirements.

2.3.2.2 Exposed Fasteners

Provide corrosion-resistant coated steel, aluminum, stainless steel, or nylon-capped, steel-compatible exposed fasteners, with the sheet panel or flashing. Provide exposed fasteners of a type and size recommended by the manufacturer to meet the performance requirements and design loads specified. Provide the manufacturer's standard fasteners for accessories.

Provide an integral metal washer that matches the color of material the washer is attached to with a compressible sealing EPDM gasket approximately .238 cm 3/32 inch thick.

2.3.2.3 Screws

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

2.3.2.4 Rivets

Provide closed-end rivets, made of corrosion-resistant coated steel, aluminum, or stainless steel where watertight connections are required.

2.3.2.5 Attachment Clips

Provide clips fabricated from steel hot-dipped galvanized in accordance

Assemblies 6 |13 with ASTM A653/A653M Z275 G 90 or Series 300 stainless steel. Ensure that the size, shape, thickness and capacity are as required to meet the insulation thickness and design load criteria specified.

2.4 MATERIALS

2.4.1 Aluminum Sheet

Roll-form aluminum roof and liner panels to the specified profile, inch thickness and depth as indicated. Ensure that the material is plumb and true, and within the tolerances listed:

a. Aluminum Sheet conforming to ASTM B209, ASTM B209M, and AA ADM.

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

c. Provide panels with thermal expansion and contraction coefficients consistent with the type of system specified.

2.4.2 Steel Sheet

Provide roll-form steel roof and liner panels to the specified profile, and depth as indicated.

Ensure the material is plumb and true, and within the tolerances listed:

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

b. Provide panels with thermal expansion and contraction consistent with existing roof panels on adjacent roof sections.

2.4.3 Finish

Ensure all panels receive a factory-applied polyvinylidene fluoride containing 100% inorganic pigments finish consisting of a baked-on top-coat and a manufacturer's recommended prime coat

Color: Ensure that the exterior finish is as chosen from the manufacturer's standard color chart.

2.5 ACCESSORIES

Assemblies 7 |13

2.5.1 General

Provide only accessories which are compatible with the metal roof panels.

Sheet metal flashing, trim, metal closure strips, caps and similar metal accessories can not be less than the minimum thickness specified for the roof panels. Submit a 10 inches long sample of each type. Ensure the exposed metal accessories and finishes match the panels furnished, except as otherwise indicated. Provide molded-foam rib, ridge and other closure strips which are non-absorbent closed-cell or solid-cell synthetic rubber or pre-molded neoprene to match the configuration of the panels.

2.5.4.1 Sealants

Provide an approved gun-type sealant for use in hand- or air-pressure caulking guns at temperatures above 4 degrees C 40 degrees F (or frostfree application at temperatures above minus 12 degrees C 10 degrees F with minimum solid content of 85 percent of the total volume. Provide sealant that has a tough, durable, dry surface skin that permits it to remain soft and pliable underneath, providing a weather-tight joint. No migratory staining 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.

Field Applied Caulking: Use an approved gun-grade, non-sagging one-component polysulfide or two-component polyurethane with an initial maximum Shore A durometer hardness of 25, conforming to ASTM C920, Type II. Match the color to the panel colors.

PART 3 EXECUTION

3.3 INSTALLATION

3.3.1 Workmanship

Ensure lines, arises, and angles are sharp and true. Free exposed surfaces from visible wave, warp, buckle, and tool marks. Fold back exposed edges neatly to form a 1.27 cm 1/2 inch hem on the concealed side. Ensure that sheet metal that is exposed to the weather is watertight, with provisions for expansion and contraction.

Ensure surfaces that are to receive sheet metal are plumb and true, clean, even, smooth, dry, and free of defects and projections that might affect the application. Install items not shown in detail or not covered by

Assemblies 8 |13 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 necessary to make the work watertight.

3.3.2 Roof Panels

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 and other components of the work in place, with provisions for thermal and structural movement in accordance with NRCA 0429.

a. Steel Roof Panels: Use stainless-steel fasteners for exterior surfaces and galvanized steel fasteners for interior surfaces.

b. Aluminum Roof Panels: Use aluminum or stainless-steel fasteners for exterior surfaces and aluminum or galvanized steel fasteners for interior surfaces.

Lay roofing sheets with corrugations in the direction of the roof slope.

End laps of exterior roofing cannot be less than 20.3 cm 8 inches; the side laps of standard exterior corrugated sheets cannot be less than 2-1/2 corrugations

3.3.3 Fasteners

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

3.3.4 Flashing, Trim and Closure

3.3.4.1 General Requirements

Comply with performance requirements, the manufacturer's written installation instructions, and SMACNA 1793. Provide concealed fasteners where possible, and set units true to line and level as indicated. Install work with laps, joints, and seams that will be permanently watertight and weather-resistant.

Install sheet metalwork to form weathertight construction without waves, warps, buckles, fastening stresses or distortion, and allow for expansion and contraction. Ensure sheet metal mechanics perform cutting, fitting, drilling, and other operations in connection with sheet metal work required to accommodate the work of other trades.

Assemblies 9 |13

3.3.4.2 Metal Flashing

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

Provide exposed metal flashing that is the same material, color, and finish as the specified metal roofing.

Fasten flashing at not more than 20.8 cm 8 inches on-center for roofs, except where flashing are held in place by the same screws that secure covering sheets.

Furnish flashing in at least 2.44 m 8 foot lengths. Provide exposed flashing that has 2.54 cm 1 inch locked and blind-soldered end joints, and expansion joints at intervals of not more than 4.88 m 16 feet.

Bed exposed flashing and flashing subject to rain penetration in the specified joint sealant.

To prevent electrolytic deterioration, isolate flashing that is in contact with dissimilar metals by means of the specified asphalt-mastic material.

Form drips to the profile indicated, with the edge folded back 1.27 cm 1/2 inch to form a reinforced drip edge.

3.3.5 Information Form and Placard

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

Provide an information card 8 1/2 inches by 11 inches minimum, identifying the 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, date of completion, installing contractor identification and contact information; manufacturer warranty expiration, warranty reference number, and contact information. Provide the information card to the Contracting Officer.

Assemblies 10 |13

3.4 FIELD QUALITY CONTROL

3.4.1 Acceptance Provisions

3.4.1.1 Erection Tolerances

Erect metal roofing straight and true with plumb vertical lines correctly lapped and secured in accordance with the manufacturer's written instructions. Do not vary horizontal lines more than 0.32 cm in 12.2 m 1/8 inch in 40 feet.

3.4.1.2 Leakage Tests

Finished application of metal roofing is subject to inspection and test for leakage by the Contracting Officer, and architect/engineer. Conduct inspections and tests without cost to the Government.

Perform inspections and tests promptly after erection to permit correction of defects and the removal and replacement of defective materials.

3.4.1.3 Repairs to Finish

Repair scratches, abrasions, and minor surface defects in the finish with the specified repair materials. Ensure repaired finished surfaces are uniform and free from variations of color and surface texture.

Immediately remove and replace repaired metal surfaces that are not acceptable to the project requirements with new material.

3.4.2 Manufacturer's Inspection

Ensure the roof manufacturer's technical representative visits the site prior to the completion of work to verify the adequacy of work in place.

Note in the report the overall quality of work, deficiencies, and any other concerns, and recommended corrective action. Submit (2) signed copies of the manufacturer's field inspection reports to the Contracting Officer within 10 calendar days of substantial completion.

3.5 ADJUSTING AND CLEANING

Clean all 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 steel wool, fittings, and drilling debris and scrub the work clean. Ensure exposed metal surfaces are free of dents, creases, waves, scratch marks, solder or weld marks, and damage to the finish coating.

Assemblies 11 |13

Collect and place scrap/waste materials in containers. Dispose of demolished materials immediately. Do not allow demolished materials to accumulate on-site; transport demolished materials from government property and legally dispose of them.

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