Greybull Roof Replacement Specs.pdf

BIGHORN NATIONAL FOREST

GREYBULL WORK CENTER BARRACKS

BIGHORN COUNTY, WY

STATEMENT OF WORK

For

GREYBULL WORK CENTER BARRACKS ROOF REPLACEMENT

4/2023

INDEX

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01010 - SUMMARY OF THE WORK

SECTION 01330 - SUBMITTAL PROCEDURES

SECTION 01350 - DEMOLITION AND REMOVAL

SECTION 01530 – BARRIERS

SECTION 01600 - USE OF GOVERNMENT FACILITIES, UTILITIES, ETC

SECTION 0l7l0 - CLEAN UP AND DISPOSAL

SECTION 01900 - MEASUREMENT AND PAYMENT

DIVISION 07 – THERMAL AND MOISTURE PROTECTION

SECTION 07411 - METAL ROOF PANELS

SECTION 07600 - FLASHING AND SHEET METAL

SECTION 07630 - GUTTERS & DOWNSPOUTS

DIVISION 1 - GENERAL REQUIREMENTS

SECTION 01010 - SUMMARY OF THE WORK

SECTION 01010

SUMMARY OF WORK

PART 1 - GENERAL

1.1 SUMMARY

A. Reroofing activities will take place on one (1) U.S. Forest Service building. The following principal features will include but will not necessarily be limited to; replacing existing vent jacks, installing new metal gutters and downspouts, fascia and eave trim and all related accessories, and removing existing asphalt shingles and installing new metal roofing along with all related accessories on each of the building the main roof(s).

1.2 LOCATION

A. This project is located at the Greybull Work Center, 1220 North 8th, Greybull, WY 82426 on the Bighorn National Forest, Medicine-Wheel Ranger District within Big Horn County, Wyoming.

1.3 START OF WORK

A. It is anticipated that work will begin approximately October, 2023.

1.4 CONTRACT TIME

A. Work shall be completed no later than 60 calendar days after the effective date of NOTICE TO PROCEED, subject to such extensions as may be authorized.

1.5 PRE-BID TOUR

A. A formal pre-bid tour will not be held.

1.6 GENERAL SITE CONDITIONS AND WEATHER

A. The elevation of the site is approximately 3800 feet above mean sea level. The construction site experiences summers that are hot, dry, and mostly clear with temperatures ranging from 90 degrees in afternoon to 50 degrees at night.

1.7 USE OF PREMISES

A. General: Contractor shall have full use of premises for construction operations, including use of Project site, during construction period. Contractor's use of premises is limited only by the Government's right to perform work or to retain other contractors on portions of the project.

B. The Contractor shall at all times conduct his operations to ensure the least inconvenience to the public and employees. The buildings will be utilized by Government employees during construction. Building tenants will be moved to other facilities when required, upon written approval by the Contracting Officer’s Representative (COR). The Contractor shall request in writing, at minimum, one (1) calendar week prior to needing a building unoccupied for construction activities that will pose a safety concern to the occupants.

C. Confine storage of materials to areas as approved by the COR.

D. Contractor shall provide adequate signing and barricades and take necessary safety measures to protect the public and Government employees during all construction operations.

E. Electrical – The Contractor may connect into the Forest Service electrical distribution system for temporary electrical power needed for construction, provided no interruption in electrical service to Government facilities is required. No charge will be made for electricity used. The Contractor will be responsible for providing necessary cords, etc. to carry utilities to the point of use.

F. Water – Water may be taken from the existing distribution system of the Greybull Barracks at no charge. Water must be taken from exterior yard hydrants. Methods of transporting water are the responsibility of the Contractor.

G. Sanitary – Sanitary facilities within the dwellings are not available for Contractor use. The Contractor must supply their own sanitary services for use throughout the project.

1.8 GOVERNMENT FURNISHED ITEMS

A. N/A.

1.9 MEALS AND LODGING

A. Meals and lodging are commercially available in the City of Greybull, Wyoming within 1 mile of the construction site. Additionally, hotels are available within 4 miles of the construction site and commercially provide meals and lodging. Meals or lodging will not be available at Forest Service facilities.

1.10 CAMPING

A. Upon written request and approval by the Medicine Wheel Ranger District, camping will be allowed at Greybull Work Center. Two (2) trailer sites with full-service connections (water, sewer and electricity) will be available for Contractor use at no cost.

1.11 CONSTRUCTION SEQUENCE

A. There is no specified construction sequence for project.

B. Depending on conditions, normal fire restrictions may apply to activities associated with this project.

1.12 FIELD VERIFICATION

A. Field verify all new and existing dimensions affecting the work of this contract before ordering products.

1.13 PERMITS

A. None are required.

END OF SECTION 01010

SECTION 01330

SUBMITTAL PROCEDURES

PART 1- GENERAL

1.1 SUMMARY

A. This Section includes administrative and procedural requirements for submitting Shop Drawings, Product Data, Samples, and other miscellaneous submittals.

1.2 SUBMITTAL PROCEDURES

A. Coordination: Coordinate preparation and processing of submittals with performance of construction activities.

1. Coordinate transmittal of different types of submittals for related parts of the project so processing will not be delayed because of need to review submittals concurrently for coordination.

a. CO reserves the right to withhold action on a submittal requiring coordination with other submittals until related submittals are received.

B. Processing Time: Allow enough time for submittal review, including time for resubmittals, as follows. Time for review shall commence on CO's receipt of submittal.

1. Initial Review: Allow 10 days for initial review of each submittal. Allow additional time if processing must be delayed to permit coordination with subsequent submittals.

CO will advise Contractor when a submittal being processed must be delayed for coordination.

2. If intermediate submittal is necessary, process it in same manner as initial submittal.

3. Allow 10 days for processing each resubmittal.

4. No extension of the Contract Time will be authorized because of failure to transmit submittals enough in advance of the Work to permit processing.

C. Identification: Place a permanent label or title block on each submittal for identification.

1. Indicate name of firm or entity that prepared each submittal on label or title block.

2. Provide a space approximately 2 by 3 inches on label or beside title block to record

Contractor's review and approval markings and action taken by CO.

3. Include the following information on label for processing and recording action taken:

a. Project name.

b. Date.

c. Name and address of Contractor.

d. Name of manufacturer.

e. Unique identifier, including revision number.

f. Other necessary identification.

D. Deviations: Highlight, encircle, or otherwise identify deviations from the Contract Documents on submittals.

E. Additional Copies: Unless additional copies are required for final submittal, and unless CO observes noncompliance with provisions of the Contract Documents, initial submittal may serve as final submittal.

F. Use for Construction: Use only final submittals with mark indicating action taken by CO in connection with construction.

PART 2 – PRODUCTS

2.1 SUBMITTALS

A. General: Prepare and submit Submittals required by individual Specification Sections.

1. Number of Copies: Submit three copies of each submittal, unless otherwise indicated.

CO will return two copies. Mark up and retain one returned copy as a Project Record Document. Literature that is not marked or otherwise designated to show the exact model, size, etc. the Contractor proposes to use, will be returned by the Contracting Officer “without action”. Circle or check items on submittals. Highlighter pens may print black or not at all when copied and should not be used.

2. Contractor may choose to utilize electronic submissions for each submittal if they choose. Submittals must be in the .pdf format and must comply with all other requirements of this section. Electronic submissions will require one copy of each submittal.

3. Information must be adequate to determine compliance with specifications.

4. Submittals or shop drawings which are received from sources other than through the Contractor’s office will be returned “without action”.

B. Samples: Prepare physical units of materials or products, including the following:

1. Samples for Initial Selection: Submit manufacturer's color charts consisting of units or sections of units showing the full range of colors, textures, and patterns available.

2. Submit two (2) samples of color, style, etc. One sample of selected color, etc. will be retained. All other samples and hardware samples will be returned.

C. Substitutions: Materials in the specifications may be followed by the words "or approved equal." In these cases, wherever the name or brand of a manufacturer's article is specified, it is used as a measure of quality and utility or a standard. If contractor prefers to use any other brand or manufacturer of same quality, appearance and utility to that specified, he shall request substitution as provided below, not less than thirty (30) days before the planned installation of the item. Contracting Officer will approve or disapprove the request for substitution and his decision shall be final. Unless substitutions are requested within the time stated above and as provided below, no deviation from the specifications will be allowed.

Requests for substitutions will only be considered if contractor submits the following:

1. Complete technical data including drawings, complete performance specifications, test data, samples and perform tests of the article proposed for substitution. Submit additional information if required by Contracting Officer. All items in the above information shall be circled, tagged, or marked in some way to indicate all deviations or differences, which the proposed item differs from the originally specified item.

2. Similar data as above for item originally specified. All items shall be marked to identify where/how the proposed substitution will differ.

3. Statement by contractor that the proposed substitution is in full compliance with the contract documents and applicable codes, and laws.

4. List of other trades (if any) that may be affected by the substitution.

5. Contractor shall be responsible for any effect upon related work in the project for any substitution and shall pay any additional costs generated by any substitutions.

2.2 INFORMATIONAL SUBMITTALS

A. General: Prepare and submit Informational Submittals required by other Specification Sections.

1. Number of Copies: Submit two copies of each submittal, unless otherwise indicated.

CO will not return copies.

B. Contractor's Construction Schedule:

1. Contractor shall provide a construction schedule outlining the proposed sequence of construction activities with dates (beginning and ending) associated with each activity.

PART 3 – EXECUTION

3.1 GENERAL

A. Review each submittal and check for compliance with the Contract Documents. Note corrections and field dimensions. Mark with approval stamp before submitting to CO.

B. Approval Stamp: Stamp each submittal with a uniform, approval stamp. Include Project name and location, submittal number, Specification Section title and number, name of reviewer, date of Contractor's approval, and statement certifying that submittal has been reviewed, checked, and approved for compliance with the Contract Documents.

C. CO will not review submittals that do not bear Contractor's approval stamp and will return them without action.

D. Submittals not required by the Contract Documents will not be reviewed and may be discarded.

END OF SECTION

SECTION 01350 - DEMOLITION AND REMOVAL

PART I - GENERAL

1.1 SCOPE

A. This section includes general requirements for all demolition work SHOWN ON THE DRAWINGS or included in other specifications. This shall include the removal and disposal of all material not specifically designated to remain government property. This work includes but is not limited to: removal of existing gutters, existing asphalt shingles, existing ridge caps, and existing flashings on the building. The extent to which each of these tasks is performed on each building is outlined in the SUMMARY OF WORK.

1.2 PROTECTIONS

B. Provide temporary barricades and other forms of protections as required to protect the

Government personnel, residents, and the general public from injury due to demolition.

C. Provide temporary weather protection during interval between demolition and removal of existing roofs and installation of new roof to ensure that no water leakage or damage occurs to structure on interior areas of existing building.

D. Remove protections at completion of work.

PART 2 - EXECUTION

3.1 INSPECTION

A. If at any time during the demolition phase, any portion of the roof appears to be structurally unsound, (including the sub-roof or roof decking, etc.) the Contractor shall cease all demolition and notify the COR immediately.

B. After completion of selective demoltion, the COR and Contractor shall jointly inspect the structural roof components of all of the roofs to receive new roofing to determine if any are damaged and in need of repair or replacement. The contractor shall not begin roof installation until it has been determined that all structural components are acceptable.

C. The Contractor shall be liable for any damage done to any existing surfaces as result of the demolition work.

3.2 DEMOLITION OF DESIGNATED ITEMS

A. The contractor may use any means to remove the items called out on the drawings, as long as the safety of workers and the preservation of items to remain is provided for.

3.3 DISPOSAL

A. All materials removed from job and not designated for reuse shall be properly disposed of at a sanitary landfill.

3.4 CLEAN-UP AND REPAIR

A. Repair any demolition performed in excess of that required in this contract. Return structures and surfaces to remain to the condition that existed prior to commencement of demolition work. Repair adjacent construction or surfaces soiled or damaged by demolition work.

Repair all personal property and landscape items that may have been damaged during demolition activities.

END OF SECTION 01350

SECTION 01530 – BARRIERS

GENERAL

1.01 Scope: Install and maintain suitable barriers to insure the protection of the public, employees and facilities.

PRODUCTS

2.01 General: Material may be new or used but shall be suitable for intended purpose. Fences and barriers shall be structurally adequate and neat in appearance.

2.02 Barricades and Signs: ANSI d6.1 (MUTCD), Part VI.

EXECUTION

3.01 Protection of Public:

A. Fence, barricade, or otherwise block off the immediate work area to prevent unauthorized entry to the work area.

B. Erect and maintain barricades and warning signs in accordance with ANSI D6.1.

END OF SECTION 01530

SECTION 01600 - USE OF GOVERNMENT FACILITIES, UTILITIES, ETC.

1.01 Scope: Applies to Government facilities at the worksites available for use by the Contractor.

1.02 Storage Area: Storage will be available for the Contractor's materials and equipment at the project location. The Government shall not be responsible for the Contractor's materials or equipment stored on Government property.

1.03 Utilities: Drinking water and sanitation facilities will not be available at the worksite. Electrical power will be available for construction use only.

END OF SECTION 001600

SECTION 0l7l0

CLEAN UP AND DISPOSAL

PART 1 - GENERAL

1.1 CLEAN UP

A. The contractor shall keep the work site free from accumulation of waste materials and rubbish resulting from the work at all times. The site shall be used by the Government on an ongoing basis during the project, so care must be used to protect employees from waste on the ground, falling objects, etc.

B. Before final acceptance of the project by the Government, the contractor shall remove from Government land all waste materials and rubbish resulting from this work.

1.2 DISPOSAL

A. Trash, Garbage and Construction Debris:

1. Haul to State-approved sanitary landfill. All associated costs shall be paid by the

Contractor.

B. Washing waste material down sewers or into waterways will not be permitted.

SECTION 01900 - MEASUREMENT AND PAYMENT

1.01 Scope: Applies to method of measurement and basis of payment for work items listed in the Bid

Schedule.

1.02 Work: Furnishing all labor, materials, equipment and other incidental necessary to successfully complete the project or any portion of it, and carrying out all duties and obligations imposed by the contract on the Contractor.

1.03 Payment: For each individual item listed in the Bid Schedule, payment shall be full compensation for all work related to the particular item in accordance with these specifications.

2.01 Removal of Existing

A. Description: Contractor shall remove and dispose of all materials in accordance with

SECTION 01350 - DEMOLITION AND REMOVAL Item includes all materials, labor, disposal fees, and incidentals necessary to complete the work.

B. Measurement and Payment: Payment shall be in full compensation for work completed at contract unit price.

2.02 Installation of.

A. Description: Contractor shall install all mateirals along with any of there accessories in accordance with the drawings and SECTION 07411 - METAL ROOF PANELS, SECTION

07600 - FLASHING AND SHEET METAL, SECTION 07630 - GUTTERS &

DOWNSPOUTS. Item includes all materials, labor, and incidentals necessary to complete the work.

B. Measurement and Payment: Payment shall be in full compensation for work completed at contract unit price.

END OF SECTION 01900

SECTION 07411

METAL ROOF PANELS

PART 1 - GENERAL

3.2 SUMMARY

A. This Section includes the following:

1. Factory-formed and field-assembled, exposed-fastener, lap-seam metal Purlin Bearing Rib (PBR) roof panels.

2. Metal trim pieces, including, but not limited to: drip edges, flashings, ridge cap, snow guards, etc.

3.3 SUBMITTALS

A. Product Data: Submit manufacturer’s product specifications, standard details, certified products test results, installation instructions, maintenance data, and general recommendations, as applicable to materials and finishes for each component, accessory and for a total roofing system.

1. Items needing submittals are for a complete roofing system and may include but not limited to: Roofing panels, underlayment, roof sheathing, roof jacks, gutters, drip edge, flashing and trim pieces, permanent fall arrest anchor system, etc.

B. Color Samples: Submit manufacturer’s full range of color to the COR for color selection.

C. Warranty: Submit written warranty that the finish conforms to the requirements herein.

D. Asphalt Adhesive: Submit information to COR for approval.

3.4 QUALITY ASSURANCE

A. Installer Qualifications: Contractor and employees must be familiar with and have previous experience in the installation of metal roofing panels.

3.5 WARRANTY

A. Special Warranty: Manufacturer's standard form in which manufacturer agrees to repair or replace components of metal roof panel assemblies that fail in materials or workmanship within specified warranty period.

1. Siliconized Polyester Finish Warranty Period: 25 years from date of Substantial Completion.

PART 2 - PRODUCTS

4.1 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. Zinc-Coated (Galvanized) Steel Sheet: ASTM A 653/A 653M, G90 (Z275) coating designation; structural quality.

2. Aluminum-Zinc Alloy-Coated Steel Sheet: ASTM A 792/A 792M, Class AZ50 coating designation, Grade 40 (Class AZM150 coating designation, Grade 275);

structural quality.

3. Surface: smooth flat finish.

4. Exposed Finishes:

a. Siliconized-Polyester Coating: Dry film thickness of not less than 0.2 mil (0.005 mm) for epoxy primer and 0.8 mil (0.02 mm) for topcoat.

5. 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 roof panel manufacturer.

3. Butyl-Rubber-Based, Solvent-Release Sealant: ASTM C 1311.

4.2 UNDERLAYMENT MATERIALS

A. Underlayment shall be Synthetic Self Adhesive UDL 30 such as Titanium Synthetic Roofing Underlayment (or approved equal).

B. Ice Dam Membrane: Self-adhering, cold applied polyethylene membrane. Top surface consisting of an embossed, slip-residing polyethylene laminated to a rubberized asphalt adhesive, with paper release backing, at least 1.0 mm thick, tensile strength = 250 psi, permanence of 0.05 perms max, Grace “Ice and Water Shield” or approved equal.

4.3 MISCELLANEOUS MATERIALS

A. Fasteners: Self-tapping screws, bolts, nuts, self-locking rivets and bolts, end-welded studs, and other suitable fasteners designed to withstand design loads. Provide exposed fasteners with heads matching color of metal roof panels by means of plastic caps or factory-applied coating.

1. Fasteners for Roof 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.

2. Fasteners for Roof Panels: Self-drilling or self-tapping 410 stainless or zinc-alloy steel hex washer head, with EPDM or PVC washer under heads of fasteners bearing on weather side of metal roof panels.

3. Fasteners for Flashing and Trim: Blind fasteners or self-drilling screws with hex washer head.

4. Blind Fasteners: High-strength aluminum or stainless-steel rivets.

4.4 METAL ROOF PANELS

A. Exposed-Fastener, Lap-Seam Metal Roof 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. Available Manufacturers:

a. Berridge Manufacturing Company.

b. BHP Steel Building Products USA Inc.

c. CENTRIA Architectural Systems.

d. Copper Sales Inc.

e. Custom Panel Industries, LLC.

f. Fabral, Inc.

g. Flexospan Steel Buildings, Inc.

h. Galvamet Inc.

i. MBCI; Div. of NCI Building Systems.

j. McElroy Metal, Inc.

k. Metal Sales Manufacturing Corporation.

l. Morin Corporation; a Metecno Group Company.

m. Petersen Aluminum Corporation.

n. Reynolds Metals Company.

o. Steelox Systems Inc.

p. United Steel Deck, Inc.; Subsidiary of Bouras Industries, Inc.

q. VICWEST; Div. of Jenisys Engineered Products.

2. Profile: Purlin Bearing Rib or approved equal.

3. Material: Metallic-coated steel sheet, 24 gauge, 36” wide panels, height = 1 ¼”, major rib spacing = 12” o.c.

a. Exterior Finish: Siliconized polyester

b. Color: As selected by Contracting Officer’ Rep (COR) from manufacturer's full range.

4.5 ACCESSORIES

A. Roof Panel Accessories: Provide components required for a complete metal roof panel assembly including trim, copings, fasciae, corner units, ridge closures, clips, flashings, sealants, gaskets, fillers, closure strips, and similar items. Match material and finish of metal roof panels, unless otherwise indicated.

1. Closures: Provide closures at eaves and ridges, fabricated of same metal as metal roof panels.

2. Clips: Minimum 0.0625-inch- (1.6-mm-) thick, stainless steel panel clips designed to withstand negative-load requirements.

3. Cleats: Mechanically seamed cleats formed from minimum 0.0250-inch- (0.64-mm-) thick, stainless steel or nylon-coated aluminum sheet.

4. 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 roof panel profile. Provide closure strips where indicated or necessary to ensure weathertight construction.

B. Flashing and Trim: Formed from 24 gauge, metallic-coated steel sheet. Provide flashing and trim as required to seal against weather and to provide finished appearance.

Locations include eaves, rakes, corners, bases, framed openings, ridges, fasciae, and fillers. Finish flashing and trim with it finishes system as adjacent metal roof panels.

Warranty shall be the same as that of the roof panels.

C. Snowguards: “Standard Seam Fence style” snowguards shall be install along the entire length of each building at each building’s point of entry and shall be color matched to the new metal roofing panels. 24 gauge steel shall be utilized and warranty shall be the same as that of the roof panels. System shall be installed per the manufacturer’s recommendations.

D. Permanent Fall Arrest Anchors: Anchors shall be installed to a sound rigid, sound materials that are capeable of supporting the required loads possible for the specified anchor.

1. Material: Alloy steel D-ring and 20 gauge stainless steel sheet metal.

2. Minimum Breaking Strength: 3,600 lbs (16kN) when loaded within the direction limitations.

3. Capacity: 310 lbs (one person)

4.6 FABRICATION

A. General: Fabricate and finish metal roof 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. Provide panel profile, including major ribs and intermediate stiffening ribs, if any, for full length of panel.

C. Where indicated, fabricate metal roof panel joints with factory-installed captive gaskets or separator strips that provide a tight seal and prevent metal-to-metal contact, in a manner that will minimize noise from movements within panel assembly.

D. 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.

E. Protect mechanical and painted finishes on exposed surfaces from damage by applying a strippable, temporary protective covering before shipping.

PART 3 - EXECUTION

5.1 PREPARATION

A. General: These specifications and the contract drawings represent minimum Government requirements. Any additional requirements by the roofing system manufacture shall be incorporated into the work at no additional cost to the Government.

B. Roof Preparation:

1. Re-nail any existing sheathing panel that are loose or sprung.

2. Inform the COR immediately if any rotted or otherwise structurally deficient sheathing encountered.

5.2 UNDERLAYMENT INSTALLATION

A. Synthetic “Titanium” (or approved equal) Underlayment: Install underlayment in accordance with manufacturer’s instructions.

B. Self-Adhering Sheet Underlayment: Install ice dam membrane per manufacturer’s installation instructions. Extend membrane 6 ft minimum from all fascias and valleys.

Overlap sheets a minimum of 6 inches at all joints.

5.3 METAL ROOF PANEL INSTALLATION, GENERAL

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

1. Field cutting of metal roof panels by torch is not permitted.

2. Rigidly fasten eave end of metal roof panels and allow ridge end free movement due to thermal expansion and contraction. Predrill panels.

3. Provide metal closures at rake edges each side of ridge and hip caps.

4. Flash and seal metal roof panels with weather closures at eaves, rakes, and at perimeter of all openings. Fasten with self-tapping screws.

5. Locate panel splices over, but not attached to, structural supports. Stagger panel splices and end laps to avoid a four-panel lap splice condition.

6. Lap metal flashing over metal roof panels to allow moisture to run over and off the material.

B. Fasteners:

1. Steel Roof Panels: Use stainless-steel fasteners for surfaces exposed to the exterior and galvanized steel fasteners for surfaces exposed to the interior.

2. Aluminum Roof Panels: Use aluminum or stainless-steel fasteners for surfaces exposed to the exterior and aluminum or galvanized steel fasteners for surfaces exposed to the interior.

C. Joint Sealers: Install gaskets, joint fillers, and sealants where indicated and where required for weatherproof performance of metal roof panel assemblies.

1. Seal metal roof panel end laps with double beads of tape or sealant, full width of panel. Seal side joints where recommended by metal roof panel manufacturer.

5.4 FIELD-ASSEMBLED METAL ROOF PANEL INSTALLATION

A. Lap-Seam Metal Roof Panels: Fasten metal roof 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 roof panels.

3. Locate and space exposed fasteners in uniform vertical and horizontal alignment.

4. Install screws in predrilled holes.

5. Provide sealant tape at lapped joints of metal roof panels and between panels and protruding equipment, vents, and accessories.

6. 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, ribbed, or fluted panels; and elsewhere as needed to make panels weatherproof to driving rains.

7. At panel splices, nest panels with minimum 6-inch (150-mm) end lap, sealed with butyl-rubber sealant and fastened together by interlocking clamping plates.

5.5 ACCESSORY INSTALLATION

A. General: Install accessories with positive anchorage to building and weathertight mounting and provide for thermal expansion. Coordinate installation with flashings and other components.

1. Install components required for a complete metal roof panel assembly including trim, copings, ridge closures, seam covers, flashings, sealants, gaskets, fillers, closure strips, and similar items per manufacturer’s recommendations.

2. Comply with performance requirements, manufacturer's written installation instructions, and SMACNA's "Architectural Sheet Metal Manual." 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.

5.6 CLEANING AND PROTECTION

A. Remove temporary protective coverings and strippable films, if any, as metal roof panels are installed, unless otherwise indicated in manufacturer's written installation instructions. On completion of metal roof panel installation, clean finished surfaces as recommended by metal roof panel manufacturer. Maintain in a clean condition during construction.

SECTION 07600

FLASHING AND SHEET METAL

PART 1 - GENERAL

1.1 RELATED WORK SPECIFIED ELSEWHERE

A. Standing Seam Metal Roofing – Section 07411

1.2 DESCRIPTION OF WORK

A. Extent of each type of flashing and sheet metal work is indicated on drawings and by provisions of this section.

B. Types of work specified in this section include the following:

Gutters and downspouts (rain drainage).

Roof vent flashing.

1.3 REFERENCES AND STANDARDS

A. Sheet metal shall be fabricated and installed as shown on the drawings or specified.

If not shown or specified, work shall be in accordance with the "Architectural Sheet Metal Manual" of the Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA).

1.4 SUBMITTALS

A. Submit shop drawings of fabricated items for approval.

1.5 FIELD MEASUREMENTS AND TEMPLATES

A. Contractor shall obtain all field measurements required for proper fabrication and installation of work covered by this section.

PART 2 - PRODUCTS

2.1 SHEET METAL

A. Galvanized sheet steel: ASTM A526 (commercial quality).

B. Aluminum sheets: ASTM B209 in alloys of 3003, 3004, Alclad 3003, Alclad 3004, or Alclad 3005 in appropriate tempers.

2.2 FASTENINGS

A. Fastening shall be of a type suited for the intended purposes.

B. Nails shall be barbed or screw type.

C. Fastening shall be same material as sheet metal except stainless steel shall be used for connecting dissimilar metals, and copper fastenings shall be used with lead flashing.

2.3 SOLDER

A. ASTM B32, alloy grade 50 A.

1. Flux shall be muriatic acid killed with zinc, or an approved brand of soldering flux.

2.4 RAIN GUTTERS

A. Gutters shall be seamless, style "K", 5".

B. Gutter shall be minimum 0.027 aluminum.

C. Front edge of gutter shall be lower than the back so that overflow will spill over the front of gutters.

D. Gutters shall be attached using strap hangers attached to roof.

E. All gutters; eave flashing, hangers, fasteners and accessories shall be of the same material.

2.5 DOWNSPOUTS

A. Downspouts including all necessary elbows, and hangers shall be furnished and installed as required.

B. Downspouts shall be rectangular corrugated, 2" X 3", .027 aluminum.

C. Hangers shall be fabricated of 1/16" X 1" flat stock and of same material as the downspouts.

D. Downspouts shall be joined at gutter by means of an outlet tube.

2.8 MASTIC SEALANT

A. Polyisobutylene; non-hardening, non-skinning, non-drying, non-migrating sealant.

2.9 ROOF VENT FLASHINGS: Rubber roof jacks, type recommended for each type of vent.

2.9.1 SNOWGUARDS: “Standard Seam Fence style” snowguards shall be install along the entire length of each building at each building’s point of entry and shall be color matched to the new metal roofing panels. 24 gauge steel shall be utilized and warranty shall be the same as that of the roof panels. System shall be installed per the manufacturer’s recommendations.

2.10 ADHESIVES

A. Type recommended by flashing sheet manufacturer for waterproof/weather-resistant seaming and adhesive application of flashing sheet.

2.10 METAL ACCESSORIES

A. Provide sheet metal clips, straps, anchoring devices and similar accessory units as required for installation of work, matching or compatible with material being installed, non-corrosive, size and gauge required for performance.

2.11 FABRICATION

A. Shop-fabricate work to greatest extent possible.

B. Comply with details shown, and with applicable requirements of SMACNA

"Architectural Sheet Metal Manual" and other recognized industry practices.

C. Fabricate for waterproof and weather-resistant performance; with expansion provisions for running work, sufficient to permanently prevent leakage, damage or deterioration of the work.

D. Form work to fit substrates.

E. Comply with material manufacturer instructions and recommendations for forming material.

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

2.13 FINISH, RAIN DRAINAGE

A. Provide manufacturer's standard baked-on acrylic shop finish on sheet metal rain drainage units (gutters, downspouts, and similar exposed units); 1.0 mil dry film thickness. Color to be selected by the COR.

PART 3 - EXECUTION

3.1 CONDITION OF SURFACES

A. Surfaces that are to receive metal flashing shall be even, smooth, sound, thoroughly clean and dry, and free from defects that might affect the application.

3.2 INSTALLATION - GENERAL

A. Except as otherwise indicated, comply with manufacturer's installation instructions and recommendations and SMACNA "Architectural Sheet Metal Manual."

B. Anchor units of work securely in place by methods indicated, providing for thermal expansion of metal units; conceal fasteners where possible, and set units true to line and level as indicated.

C. Install work with laps, joints and seams which will be permanently watertight and weatherproof.

3.3 GUTTERS

A. Gutter is attached with a continuous cleat and hanger.

B. Cleat is nailed to the roof sheathing.

C. Hanger and cleat shall be of the same material as gutter.

D. The hanger is fastened to the bead of the gutter and nailed to the roof sheathing on 3

ft. centers.

3.4 DOWNSPOUTS

A. Downspouts shall be held in position, clear of wall, by hangers with spacing not more than 10 feet on centers.

B. Hangers shall be fastened securely to the wall.

C. Joints shall be lapped in the direction water flows or that top section fits inside of lower section.

SECTION 07630

GUTTERS AND DOWNSPOUTS

1.01 Scope: Includes manufactured gutters and downspouts as indicated on the drawings complete with hangers, straps, expansion joints, fasteners, and other accessories as required for a complete installation.

2.03 Submittals

A. Product Data: For each type of product

PRODUCTS

2.01 Gutters and Downspouts: Galvanized sheet steel, ASTM A 527 AND A 525, minimum 26 gauge (USS). Prefinished with dark brown color.

A. Gutters shall be rectangular, corrugated type, style K and conform to the

Architectural Sheet Metal Manual prepared by the Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA).

B. Nominal 6-inch X 4 1/2-inch size unless otherwise indicated on the drawings. Size shall be constant throughout the length required.

C. Front edge of gutter shall be at least 1/2 inch lower than back.

D. For gutters, the minimum ratio of depth to width shall be 3 to 4.

E. Downspout shall be rectangular, box type nominal size 3 inch x 4 inch, with flat stock braces 4 feet on center.

2.02 Expansion Joints: Lap or butt type as indicated in Architectural Sheet Metal Manual (SMACNA), plates 7 and 8.

2.03 Gutter Spacers and Straps: Same material as the gutters, straps minimum 3/16 inch by

1 inch, spacers minimum 1/16 inch by 1 inch.

2.04 Downspout Elbows: Same material and design as the downspouts. Elbows of 90 degrees prohibited unless specifically indicated on the drawings. Use 60 or 75 degree elbows at lower terminations.

2.05 Nails and Screws: Standard commercial quality, zinc-coated, sizes and types as required.

2.06 Downspout Hangers: Same material as the gutters, "U" shaped type, minimum 1/16 by 1 inch. Fasteners shall be zinc-coated and of a type suitable for the wall construction and of adequate size to secure the downspouts.

2.07 Outlet Tubes: Rectangular shape to fit the downspouts. Outside dimensions, 1/8 inch less than the inside of the downspout, minimum length 4 inches with 3/8-inch flange turned into gutter and soldered.

3.01 Gutter Installation

A. Pitch gutters slightly to drain to downspouts. Attach gutters securely with straps spaced at 36-inch centers. Spacers shall be secured to front and back of gutter and spaced alternately with straps.

B. Provide expansion joints near center of long sections over 30 feet. Solder other gutter joints. All seams and joints shall be in direction of flow.

3.02 Downspout Installation:

A. Anchor downspouts to walls at maximum 8-foot centers; minimum two anchors per downspout. Make joints in downspout systems in direction of the flow. Sheet metal screws for fastening sections are satisfactory.

B. Provide elbows as required. Termination shall be elbow to direct water into splash block and away from building.

END OF SECTION 07630