Attachment 3 - Specifications.pdf

NEBRASKA NATIONAL FORESTS & GRASSLANDS

FALL RIVER RANGER DISTRICT

FALL RIVER COUNTY, SD

SPECIFICATIONS

for

FALL RIVER RANGER DISTRICT SHOP

ROOF RENOVATION

3/2025

INDEX

SECTION 01170 – ACCIDENT PREVENTION

SECTION 01350 - DEMOLITION AND REMOVAL

SECTION 01530 – BARRIERS

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

SECTION 01900 - MEASUREMENT AND PAYMENT

DIVISION 7 – THERMAL AND MOISTURE PROTECTION

SECTION 074113 – FORMED METAL ROOF PANELS

SECTION 07620 - METAL FLASHING AND EDGES

SECTION 07630 – GUTTERS AND DOWNSPOUTS

01170-4

SECTION 01170

ACCIDENT PREVENTION

PART 1 - GENERAL

1.01 DESCRIPTION

A. The work of this Section consists of establishing an effective Accident Prevention

Program and providing a safe environment for all personnel and visitors.

B. Safety Requirements: All work conducted under this contract shall be in accordance with the Occupational Safety and Health Administration (OSHA) regulations for construction safety (29 CFR part 1926 and 29 CFR part 1910), as stated in Section I (Contract Clauses), FAR 52.236-13.

1.02 SUBMITTALS

A. Accident Prevention Program: The Contractor shall submit for approval at least 10 days prior to beginning on-site work a written Safety Plan. The Contracting Officer (CO) will review the proposed Safety Plan for compliance with OSHA and project requirements. If the Safety Plan requires any revisions or corrections, the Contractor shall resubmit the Safety Plan within 10 days of notification by the CO. No progress payments will be processed until the Safety Plan has been received and approved.

1. The Safety Plan shall include:

a. Name of responsible supervisor to carry out the program.

b. Documentation or schedule of weekly and monthly safety meetings.

c. Training, both initial and continuing.

d. First aid procedures.

e. Outline of each phase of the work, the hazards associated with each major phase, and the methods proposed to ensure property protection and safety of the public, government personnel, and the Contractor's employees. Identify the work included under each phase by reference to SPECIFICATION SECTION.

Emergency Response: Planning for possible emergency situations, such as accidents, floods, fires, cave-ins, slides, explosions, power outages, and storms.

Such planning shall take into consideration the nature of construction, site conditions, degree of exposure of persons and property, and evacuation

01170-5 procedures, and shall include emergency contact name(s) and phone numbers and route(s) to the nearest emergency response facility.

f. Certificates: Provide certificates from a mechanic that all mechanical equipment has been inspected and meets OSHA requirements.

g. Submit a copy of test reports, as required by OSHA, for personnel working with hazardous materials.

B. Upon request by the CO, the Contractor shall submit a brief report of safety meetings, of safety inspections, and/or proof of employees' qualifications to perform assigned duties in a safe manner.

1.03 QUALITY ASSURANCE

A. Clauses entitled "Accident Prevention" and "Permits and Responsibilities" of the

General Provisions:

1. In case of conflicts between Federal, State, and local safety and health requirements, the most stringent shall apply.

2. Equipment or tools not meeting OSHA requirements will not be allowed on the project sites.

3. Failure to comply with the requirements of this section and related sections may result in suspension of work.

B. Qualifications of Employees:

1. The Contractor shall ensure that employees are physically qualified to perform their assigned duties in a safe manner.

2. The Contractor shall not allow employees to work whose ability or alertness is impaired because of drugs, fatigue, illness, intoxication, or other conditions that may expose themselves or others to injury.

a. At the discretion of the CO, employees whose ability or alertness appears to be impaired because of drugs, fatigue, illness, intoxication, or other conditions may be asked to remove himself/herself from the site.

b. The presence of an employee whose ability or alertness appears to be impaired because of drugs, fatigue, illness, intoxication, or other conditions may result in a suspension of work.

01170-6

3. Operators of vehicles, mobile equipment, hoisting equipment, and hazardous plant equipment shall be able to understand signs, signals, and operating instructions, and be capable of operating such equipment.

a. The Contractor shall provide operating instructions for all equipment.

b. The Contractor shall require newly hired operators be tested by an experienced operator or supervisor to determine if they are capable of safely operating equipment.

1.04 ACCIDENT REPORTING

A. Reportable Accidents: A reportable accident is defined as death, occupational disease, traumatic injury to employees or the public, property damage by accident in excess of $100, and fires.

1. In the case that a reportable accident occurs, the Contractor shall notify the CO immediately or as soon as practically possible.

2. Within 7 days of a reportable accident, the Contractor shall fill out and forward to the CO a DI-134 form.

a. DI-134 forms may be obtained from CO.

B. All Other Accidents: The Contractor shall report all other accidents to the CO as soon as possible.

1. The Contractor shall assist the CO and other officials as required in the investigation of the accident.

PART 2 – PRODUCTS

2.01 FIRST AID FACILITIES: Provide adequate facilities for the number of employees and the type of construction at the site.

2.02 PERSONNEL PROTECTIVE EQUIPMENT (PPE): PPE shall meet the requirements of

NIOSH and MSHA, where applicable, as well as ANSI.

2.03 BARRIERS: See SECTION 01530 BARRIERS.

PART 3 – EXECUTION

3.01 EMERGENCY INSTRUCTIONS: The Contractor shall post telephone numbers and reporting instructions for ambulance, physician, hospital, fire department, and police in conspicuous locations at the work site.

01170-7

3.02 ESCAPE ROUTES: The Contractor shall always provide and maintain adequate escape routes in accordance with the Life Safety Code (NFPA 101-91).

3.03 PROTECTIVE EQUIPMENT: The Contractor shall inspect personal protective equipment daily and maintain in a serviceable condition. Clean, sanitize, and repair, as appropriate, personal items before issuing them to another individual.

A. The Contractor shall inspect and maintain other protective equipment and devices before use and on a periodic basis to ensure safe operation.

3.04 SAFETY MEETINGS

A. Pre-Work Safety Meeting: Prior to beginning work, the Contractor shall conduct a Pre- Work Safety Meeting to discuss planned operations, types of equipment to be used, and any task or site-specific safety hazards associated with the work to be conducted under this contract.

1. ALL personnel, including supervisors, workers, and subcontractors who will be performing work under this contract shall attend the pre-work safety meeting.

2. The Contractor shall notify the CO a minimum of 48 hours prior to holding the Pre-

Work Safety Meeting so that he/she may attend.

B. As a minimum, the Contractor should conduct weekly 15-minute "toolbox" safety meetings. These meetings shall be conducted and documented by a qualified supervisor or foreman and attended by all construction personnel at the worksite.

1. Documentation of the weekly "toolbox" safety meetings, including the date and time of the meeting, subject discussed, and a list of individuals in attendance shall be provided to the CO upon request.

C. Conduct monthly safety meetings, as required by the CO, for all levels of supervision.

1. The Contractor shall notify the CO a minimum of 48 hours prior to holding the monthly safety meeting so that he/she may attend.

2. These meetings shall be used to review the effectiveness of the Contractor's safety effort, to resolve current health and safety problems, to provide a forum for planning safe construction activities, and for updating the accident prevention program.

3.05 HARD HATS AND PROTECTIVE EQUIPMENT AREAS

A. The hard hat area shall be posted by the Contractor in a manner satisfactory to the

CO.

01170-8

B. It is the Contractor's responsibility to require all those working on or visiting the site to always wear hard hats and other necessary protective equipment.

1. The Contractor should provide hard hats for use by visitors.

2. Personnel and/or visitors not wearing hard hats will not be permitted on site.

3.06 TRAINING

A. First Aid: Provide adequate training to ensure prompt and efficient first aid.

B. Hazardous Material: Train and instruct each employee exposed to hazardous material in safe and approved methods of handling and storage.

1. Hazardous materials are defined as explosive, flammable, poisonous, corrosive, oxidizing, irritating, or otherwise harmful substances that could cause death or injury.

2. The Contractor shall maintain a file of Safety Data Sheets (SDSs) for all hazardous materials that are present on site.

a. SDS sheets shall be kept in conspicuous locations at the work site.

END OF SECTION 01170

01350-9

SECTION 01350 - DEMOLITION AND REMOVAL

GENERAL

1.01 Scope: Applies to the removal and replacement of items in the existing buildings.

1.02 Protection: The existing walls, floors, ceilings, and other building components not subject to removal or remodeling shall be protected from damage. Any damage shall be repaired to its original condition.

1.03 Removal: Removal shall be by qualified craftsmen.

1.04 Disposal: All debris and materials to be removed shall be disposed of at an approved landfill.

1.05 Salvage: Any materials to be removed and that are salvageable and not otherwise indicated for resuse, shall become the property of the Contractor and shall be removed from the job site.

EXECUTION

2.01 General Removal:

A. Removal shall be done in a neat, workmanlike manner so as to prevent or minimize damage to remaining components and surfaces.

B. Provide straight and plumb terminations on remaining components. Cut and trim flush with adjoining surfaces.

C. Finish disturbed areas to match existing surfaces. Touch-up and clean as required to provide surfaces suitable for finishing.

D. Carefully remove and store materials and equipment to be reused or relocated to prevent damage and reinstall as the work progresses.

E. Any materials or equipment damaged beyond repair will be replaced with the same size, shape, and quality material as existing, at no additional expense to the Government.

2.02 Existing Roof Removal:

A. Remove existing shingles and underlayment to the deck.

01350-10

1. Insure the protection of the public and employees when removing the old shingles from the roofs. Provide appropriate barriers and shields until the removal is complete.

2. Completely remove all shingles, felts, etc. down to the bare wood sheathing.

3. Wood sheathing and fascia shall be inspected for damage and/or rot. If damaged areas are identified, the Contractor shall notify the Contracting Officer immediately. Work shall not procede in the area where damage exists until approved by the Contracting Officer.

4. Metal flashing and gutters fascia shall be inspected for damage. If damaged areas are identified, the Contractor shall notify the Contracting Officer immediately.

Work shall not procede in the area where damage exists until approved by the Contracting Officer.

5. Remove all vent and pipe boots and replace with new boots.

6. The Contractor shall minimize exposure of bare wood sheathing and at the end of each work day, the wood sheathing shall be covered so that moisture cannot enter and cause damage to the rafters, roof insulation, and/or interior of the building.

END OF SECTION 01350

01530-11

SECTION 01530 – BARRIERS

1.01 Scope: Install and maintain suitable barriers as necessary 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.

3.01 Protection of Public and Government Employees:

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

01600-12

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: A storage area will be made available for materials and equipment at the project location. The Government shall not be responsible for for the Contractor’s equipment and/or materials left on Government property.

1.02 . a) East side of the structure (addition) is where the district fire engine is stored, do not block the garage door at any time during construction without approval from the

COR.

1.03 Utilities:

A. Drinking water will be available at the worksite.

B. Electrical power will be available at the worksite.

1.04 Toilet facilities are available on site during working hours (minimum of Mon.-Fri. 0700-

1700) or as determined by local Government staff on-site.

END OF SECTION 01600

01600-13

01900-14

SECTION 01900 - MEASUREMENT AND PAYMENT

1.01 Scope: Applies to method of measurement and basis of payment for work items included under this contract.

1.02 Work: Furnishing all labor, materials, equipment, and other incidentals 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: Payment shall be made by the Government for each item completed by the Contractor. Government may have work for all, or part of this project completed by independent Contractor(s). The Government has the option to complete various items for this project in phases. Payment shall be in full compensation for all work related to each item completed in accordance with these SPECIFICATIONS.

A. Damaged deck, fascia, and/or flashing shall be replaced as required via a modification to the contract and shall be approved by the Contracting Officer prior to performing the required work. Payment for replacement of damaged materials shall be in full compensation of the work completed and shall not exceed the agreed upon amount.

PAYMENT

2.01 Measurement: Completely in place and functional for each item of work performed by the Contractor.

2.02 Payment: Payment will be made at the full bid price for each item for which the Contractor has agreed to perform work. Payment shall include compensation for all materials, labor, equipment, mobilization, and any incidentals necessary to complete the work.

END OF SECTION 01900

073113-14

DIVISION 7 – THERMAL AND MOISTURE PROTECTION

SECTION 074113 – FORMED METAL ROOF PANELS

1.01 SUMMARY

A. This Section includes the following:

1. Factory-formed and field-assembled, exposed-fastener, lap-seam metal roof panels.

B. See Division 7 Section "Sheet Metal Roofing" for custom-fabricated and on-site, roll-formed sheet metal roofing.

1.02 PERFORMANCE REQUIREMENTS

A. Wind-Uplift Resistance: Comply with UL 580 Class 90 for wind-uplift resistance.

B. Hail Resistance: Comply with UL 2218 Class 4 for hail resistance.

C. Fire Resistance: Comply with UL 790 Class A for fire resistance

1.03 SUBMITTALS

A. Product Data: For each type of metal roof panel and accessory indicated.

1. Include details of edge conditions, joints, panel profiles, corners, anchorages, trim, flashings, closures, and accessories.

B. Samples: For each exposed finish.

C. Material certificates.

D. Maintenance data.

1.04 QUALITY ASSURANCE

A. Installer Qualifications: An employer of workers trained and approved by manufacturer.

1.05 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. Failures include, but are not limited to, the following:

07620-16

1. Structural failures, including rupturing, cracking, or puncturing.

2. Deterioration of metals, metal finishes, and other materials beyond normal weathering.

2. Workmanship Warranty Period: Two years from date of Substantial Completion.

B. Special Warranty on Panel Finishes: Manufacturer's standard form in which manufacturer agrees to repair finish or replace metal roof panels that show evidence of deterioration of factory-applied finishes within specified warranty period.

PRODUCTS

2.01 PANEL MATERIALS

A. Metallic-Coated Steel Sheet Pre-painted with Coil Coating: Steel sheet metallic coated by the hot-dip process and pre-painted by the coil-coating process to comply with

ASTM - A755/A755M.

Zinc-Coated (Galvanized) Steel Sheet: G90 coating designation.

2. Structural Quality. ASTM A653, Grade 80, 100,000 nominal tensile strength.

B. Panel Sealants:

1. Joint Sealant: ASTM C 920; as recommended in writing by metal roof panel manufacturer.

2.02 UNDERLAYMENT MATERIALS

A. Polyethylene Sheet: 6-mil- (0.15-mm-) thick polyethylene sheet complying with

ASTM D 4397.

B. Felts: ASTM D 226, Type II (No 30), asphalt-saturated organic felts.

C. Self-Adhering, Polyethylene-Faced Sheet: ASTM D 1970, 40 mils (1.0 mm) thick minimum, consisting of slip-resisting polyethylene-film reinforcing and top surface laminated to SBS-modified asphalt adhesive, with release-paper backing; cold applied.

2.03 MISCELLANEOUS MATERIALS

A. 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.

07620-17

2.04 METAL ROOF PANELS

A. Exposed-Fastener, Tapered-Rib-Profile Metal Roof Panels: Factory-formed, designed to be field assembled by lapping end ribs and fastened to the sheathing material that is the roof substructure. Panels are to be formed with raised, trapezoidal major ribs and intermediate stiffening ribs symmetrically spaced between major ribs.

1. Available Manufacturers:

a. Flack Global Metals

b. Berridge Manufacturing Company

c. Metal Sales Manufacturing Company

d. Everlast Metals

2. Profile: Tapered-Rib-Profile.

3. Material: Metallic-coated steel sheet, 22 gauge or .0253-inch minimum thickness before painting.

a. Color: Brown.

- Color must be approved by COR prior to ordering or installation of materials.

4. Uplift Rating: UL 580 Class 90.

2.05 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. Panel Fasteners: Self-tapping screws designed to withstand load designs. Provide exposed fasteners with heads matching color of metal panels by means of plastic caps or factory applied coating. Provide EPDM or PVC sealing washers for exposed fasteners.

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

3. Backing Plates: Provide metal backing plates at panel end splices, fabricated from material recommended by manufacturer.

4. Closure Strips: Closed-cell, expanded, cellular, rubber or crosslinked, polyolefin-foam or closed-cell laminated polyethylene; minimum 1-inch thick, flexible closure strips; cut or pre-molded to match metal roof panel profile. Provide closure strips

07620-18 as indicated by manufacturer and industry standard or necessary to ensure weathertight construction.

Flashing and Trim: Formed from same material as metal panels, 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.

Gutters and Downspouts: Formed from same material as roof panels according to SMACNA’s “Architectural Sheet Metal Manual”. Finish to match metal roof panels.

A. FABRICATION

A. 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.

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

3.01 Drip Edges: Refer to Section 7620

3.02 Flashings: Refer to Section 7620

3.03 Polyethylene/Rubberized Asphalt Sheeting:

A. Ice dam material shall be applied per manufacturer’s recommendations.

1. Install 2 courses of 36 inch wide sheeting up valleys and overlap to obtain a minumim of 24 inches coverage on either side of the valley.

B. Overlap all ends and edges a minmum of 6 inches.

C. Roll lower edge firmly with hand roller to ensure adhesion to the deck.

3.04 Underlayment: Cover the entire roof with 30 lb. asphalt-saturated felt before the shingles are laid. Lay the felt parallel to the eaves, lapping each course at least 2 inches over the underlying course. Secure the felt with only enough nails to hold it in place. If two or more pieces are required to continue a course, lap the ends at least 4 inches. End laps in a succeeding course should be located at least 6 feet from end laps in the preceding course.

Lap the felt 1 foot from both sides over all hips and ridges.

A. Apply slip-sheet over underlayment before installing metal roof panels.

07620-19

3.05 METAL ROOF PANEL INSTALLATION, GENERAL

A. General: Install metal roof panels per manufacturer’s recommendations. 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 peaks, rake edges, rake walls, and 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.

C. Metal Protection: Where dissimilar metals will contact each other or corrosive substrates, protect against galvanic action by painting contact surfaces with bituminous coating, by applying rubberized-asphalt underlayment to each contact surface, or by other permanent separation as recommended by metal roof panel manufacturer.

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

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.

3.06 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.

07620-20

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.

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.

3. Provide elbows at base of downspouts to direct water away from building.

4. Tie downspouts to underground drainage system if indicated.

3.07 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.

END OF SECTION 074113

07620-21

SECTION 07620- METAL FLASHING AND EDGES

1.01 Scope: Applies to the replacing damaged sheet metal flashing and drip edge as necessary for weathertight installation as specified herein.

PRODUCTS

2.01 Galvanized Sheet Steel: Fed. Spec QQ-S-775D, Type I, Class D.

a. Color: Green.

materials.

2.02 Bituminous Plastic Cement: Fed. Spec. SS-C-153B, Type I.

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

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

3.01 Drip Edges:

A. Drip edges should extend 3 inches back from roof edge and bend downward over fascia.

B. Apply drip edge directly to roof deck along eaves and over underlayment along rakes.

3.02 Flashing:

A. Water Infiltration: Provide sheet metal flashing and trim that do not allow water infiltration to building interior.

B. Install sheet metal flashing and trim to withstand wind loads, structural movement, thermally induce movement, and exposure to weather without failing, rattling, leaking, and fastener disingagement.

07620-22

3.03 Roof Penetrations:

A. Pipe Flashing: Form flashing around pipe penetrations and asphalt shingles. Fasten and seal to asphalt shingles as recommended by manufacturer.

1. Vent pipe jacks shall fit snuggly to prevent water infiltration around pipe.

a. Lead: Bend lead over top of pipe and insert inside pipe.

b. Metal or rubber pipe jack: Caulk around top of pipe jack to seal around the pipe.

2. Cut roofing material to fit around the pipe and embed in asphalt plastic cement where they overlap the flange.

3. The lower part of the flange shall overlap the lower portion of the roofing surface.

END OF SECTION 07620

07630-23

SECTION 07630 - GUTTERS AND DOWNSPOUTS

PART 1 - GENERAL

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.

1.01 Submittals

A. Product Data: For each type of product

PART 2 - PRODUCTS

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

1. Color: Green.

materials.

A. Gutters shall be seamless 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 5-inch X 5 1/2-inch size unless otherwise indicated. 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, closed type nominal size 4 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. Use 60 or 75 degree elbows at lower terminations.

Elbows on the west side (back) of the building shall extend approximately six (6) feet, or to the established grass and be hinged so that they can be moved during yard maintenance.

07630-24

Elbows on the east side (front) of the building shall be extended the minimum distance to terminate in a downspout splash block provided by the Government.

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.

PART 3 - EXECUTION

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. Elbows on the west side (back) of the building shall extend approximately six (6) feet, or to the established grass and be hinged so that they can be moved during yard maintenance. Elbows on the east side (front) of the building shall be extended the minimum distance to terminate in a downspout splash block provided by the Government. All gutter appurtenances are considered incidental to the single base item of gutter replacement (Item 004).

END OF SECTION 07630

B. See Division 7 Section "Sheet Metal Roofing" for custom-fabricated and on-site, roll-formed sheet metal roofing.

2. Workmanship Warranty Period: Two years from date of Substantial Completion.

B. Special Warranty on Panel Finishes: Manufacturer's standard form in which manufacturer agrees to repair finish or replace metal roof panels that show evidence of deterioration of factory-applied finishes within specified warranty period.

4. Uplift Rating: UL 580 Class 90.