B08_Attachment_No__1_SOW_updated_.pdf

DESCRIPTION / SPECIFICATION / STATEMENT OF WORK (SOW)

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PROJECT TITLE:

Bishop Mono Basin Fire Station Gutter Replacements

Table of Contents SOW 1.0 Background on the Government’s Requirement SOW 2.0 General Scope of Work SOW 3.0 Overall Objective SOW 4.0 Specific Tasks SOW 5.0 Delivery / Performance Schedule SOW 6.0 Government-Furnished Property, Materials, Services SOW 7.0 Security and Administrative Matters SOW 8.0 Technical Exhibits and Definitions Exhibit 1: Site and Installation Location Maps Exhibit 2: Photo Log Exhibit 3: Bid Schedule of Work Deliverables Exhibit 4: Specs and Asbuilts………………………………………………………….22

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SOW 1.0 Background on the Government’s Requirement

The purpose of this project is to

• replace the damaged 6-inch painted galvanized sheet metal industrial gutter system on two structures—covering approximately 435 linear feet of gutter and 16 downspouts—with similar industrial-grade materials as detailed in the sheet metal standards in Exhibit 4.

These upgrades will be carried out at the Mono Basin Interagency Fire Station. The Mono Basin Fire Station is occupied by the Bureau of Land Management (BLM) and the United States Forest Service. Located in Mono County, these facilities fall under the jurisdiction of the BLM Bishop Field Office. The fire station comprises two buildings: a single-story residential barracks and a two-story fire station garage. Aerial maps of the locations can be found in Exhibit 1, with additional site photos available in Exhibit 2.

The fire station sustained damage during severe storms in early 2023. As a result, the gutter systems require replacement. The specific tasks for this project are detailed in Section 4.

SOW 2.0 General Scope of Work

The services in this statement of work include construction services, as defined in the Federal Acquisition Regulation (FAR), for the repair and replacement of the gutter systems two-government owned industrial buildings.

The Contractor shall accomplish the following services at the individual points identified in Section 4 Specific Tasks. All proposals shall include the gutter material proposed for installation. Attendance to the site visit is strongly encouraged to ensure appropriate gutter materials are included in the Contractor’s proposal.

Place of Performance:

The project sites are all located within Mono County, California. Mono Basin Fire Station is located just west of Mono Lake. See attached Site Map and Facilities Maps located in Exhibit 1. All project sites are readily accessible from US-395.

Project Site Locations:

• Mono Basin Fire Station (38.038914°, -119.169344°) o Directions from US-395, drive northwest on US-395 6.7 miles. Turn left onto Lundy Lake Rd and arrive at the fire station’s parking lot in 0.7 miles.

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Period of Performance:

The period of performance shall be for 30 days after receiving the Notice to Proceed.

SOW 3.0 Overall Objective

The objective of this work is to replace the gutter systems Mono Basin Fire Station Garage and Barracks with like 6-inch painted galvanized sheet metal industrial gutter system on two structures—covering approximately 435 linear feet of gutter and 16 downspouts—with similar industrial-grade materials.

SOW 4.0 Specific Tasks

Mono Basin Fire Station location repairs

Refer to Exhibit 1 for a map indicating the approximate locations of gutters and downspouts, Exhibit 2 for site photos, Exhibit 3 for As-builts, and Exhibit 4 for material salient specifications.

Task 1: Mono Basin Gutter and Downspout Replacement

The Contractor shall fully replace the existing gutter systems on the two buildings at Mono Basin. The new gutters must match the existing 6-inch painted galvanized sheet metal industrial K-Style design for a metal roof, be constructed from a minimum of 24-gauge industrial material and with hidden hanger brackets. Installation must follow the Contractor’s proposed gutter manufacturer’s recommendations for industrial applications.

The Contractor shall submit all proposed material specifications with their proposal to demonstrate the minimum requirements stated within this contract are met.

The Contractor is responsible for verifying all dimensions. Approximate specifications for each building are as follows:

Residential Barracks:

• 280 linear feet of 6-inch industrial gutter o The gutters should be of the hung type, supported on the underside by brackets that allow for free thermal movement. Install gutters in the specified sizes, complete with mitered corners, end caps, outlets, brackets, and all necessary accessories.

o Ensure the outer edge of the gutter is reinforced with either a hemmed bead or a stiffening bar measuring at least 3/4 by 3/16 inches, made from a material compatible with the gutter. Fabricate gutters in sections no

SOW Page 4 shorter than 8 feet. Overlap sections by at least 1 inch in the direction of water flow or use a concealed splice plate with a minimum length of 6 inches.

o For non-aluminum gutters, join sections with riveted and soldered joints.

Aluminum gutters should be joined using riveted, sealed joints. Include expansion-type slip joints at the midpoint between outlets. Position gutters below the roof’s slope line to allow snow and ice to slide off freely.

o Support gutters with adjustable hangers spaced no more than 30 inches apart, using continuous cleats or cleats spaced at least 36 inches apart.

Ensure gutters slope uniformly towards the outlets, with the highest points positioned midway between them. Fabricate hangers and fastenings from metals compatible with the gutter material.

• 10 downspouts (see photos 1-12) o Downspout Supports: Space supports for downspouts according to the manufacturer's recommendations based on the substrate type (wood, masonry, or steel). The required types, shapes, and sizes are specified.

Ensure the installation includes all necessary components, such as elbows and offsets.

o Downspout Specifications: Provide downspouts in approximately 10-foot sections. Ensure end joints telescope at least 1/2 inch and secure longitudinal joints. Install wire ball strainers at each gutter outlet. Strainers must fit tightly into outlets and be made of the same material as the gutters.

o Installation Requirements: Maintain at least a 1-inch gap between downspouts and walls. Secure downspouts to walls at the top, bottom, and at intermediate points no more than 5 feet apart using leader straps or concealed rack-and-pin fasteners. Fabricate straps and fasteners from metal compatible with the downspouts.

o Terminations: Where downspouts connect to drainage lines, ensure a neat fit and seal joints with a Portland cement mortar cap sloped away from the downspout. For downspouts terminating in splash blocks, install elbow-type fittings and provide splash pans as specified.

Fire Station Garage:

• 170 linear feet of gutter o See details above and specifications in Exhibit 4.

• 6 downspouts (see photos 13-18) o See details above and specifications in Exhibit 4.

SOW 5.0 Delivery / Performance Schedule

The Period of performance is not anticipated to begin before July 14, 2025. Work shall be completed with 30 days of notice to proceed.

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Other Standards and Requirements

• Moving of Equipment and Supplies: The moving of equipment and supplies to the job site and between job sites shall be the responsibility of the Contractor.

• Replacement of Equipment: Contractor shall provide quality equipment capable of safely performing the work under the terms of the contract. If equipment is rejected because it does not meet minimum requirements, including but not limited to safety and operability, or if it becomes inoperative, the Contractor shall correct the deficiencies or furnish replacement equipment meeting contract requirements within 2 calendar days. All repairs are the total responsibility of the Contractor.

• Equipment Standards: Contractor shall make equipment available for inspection and approval before use. The Contractor must satisfy all applicable OSHA and DOT requirements or certifications for the operation of offered equipment. There will be no obligation to make payment for any equipment delivered that does not meet the Technical Specifications.

• Existing Facilities: All existing facilities such as piping, signs, cattle guards, drainage structures and road surfacing damaged by the Contractor's operations shall be replaced or repaired by the Contractor at no cost to the Government.

• Watershed Protection and Erosion Control: During all operations under this contract, the Contractor shall exercise reasonable measures to direct surface runoff water to stabilized waterways and to keep the drainage systems functioning effectively to prevent or minimize soil erosion and pollution of water and other resources. All refuse, including garbage, rubbish, and equipment maintenance areas shall be stored and collected in a sanitary manner and disposed of in a State-approved sanitary landfill, per local, State, and Federal regulations.

Oil from crankcases or gear boxes, equipment waste or spilled or excess fuel shall be placed in containers and removed from the work site and disposed of as approved and required by local, State, and Federal regulations.

Contractor shall undertake every reasonable measure to minimize erosion and soil damage in connection with any operations under this contract.

Contractor shall immediately discontinue any operations under this contract that due to weather or soil moisture conditions, such operations will cause excessive damage to the soil as determined by the Contracting Officer.

Equipment shall not be fueled, nor fluids changed within 100 feet of waters

SOW Page 6 of the state. Any equipment operated adjacent to state waters shall be maintained in a good state of repair and have no damaged hoses, fittings, lines, tanks, etc. that may release pollutants into the water. Waste oil and fluids shall not be stored on site. If any such material is released into the waters, the responsible person must make an effort to contain the spill and notify the Contracting Officer within 24 hours. If unable to contain spill, immediately notify the Contracting Officer and call the National Response Center (NRC) at 1-800-424-8802.

• Emergency Spill Kit: Keep sufficient quantities of absorbent materials on the project site to absorb accidental fuel, hydraulic oil, or other petroleum produce spills. Use absorbent materials that are biodegradable, non-water absorbing and designed specifically for the types of spills associated with the Contractor’s operations.

Project site construction not completed during dry weather periods shall be winterized (along with Contractor’s approved onsite staging areas and storage sites) to minimize erosion and other damage to roadways, trails, watercourses, and sensitive habitat, as directed by the Contracting Officer.

• Disposal of Debris: The Contractor shall transport and dispose of all debris and excess material off-site at an approved facility, per local, State, and Federal regulations.

Any debris left onsite after the completion of the Contract shall become the property of the Contractor, and the Contractor shall be responsible for it.

Dispose of materials in a legal manner and payment of fees required is the Contractor's responsibility. Sale of material onsite is not allowed unless authorized in writing by the Contracting Officer. Burning of removed materials is not permitted on the work site.

• Project Boundary: Prior to implementation of Contract deliverables, a pre-work meeting will be held at the project sites with the Contractor, Contracting Officer Representative (COR), and/or Project Inspector (PI).

The intent is to ensure the Contractor understands where the project sites are located, project site specifics and specifications of the contract, and review the Contractor’s plan of operations. It is encouraged that all potential Contractors complete a thorough site visit before bidding on the contract.

• Access: Access to the project area is identified on the map. If roads or any type of access become subject to damage, because of adverse weather conditions or other natural causes, the Contracting Officer or COR will relay that information to the Contractor by phone, email, or in person and the contract could be delayed.

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• Notification of Cessation or Restart of work: The Contractor shall notify the Contracting Officer prior to ceasing operations for three or more days, and before re-starting operations after a shutdown of three or more days.

This can be done by phone, E- mail, or in person.

• Fire Prevention: Contractor shall take necessary measures for prevention and suppression of fire on the contract area and other adjacent Government lands used or traversed by the Contractor in connection with operations as are required by applicable laws and regulations. Contractor shall comply with all applicable local, State, and Federal fire prevention regulations and standards. At all times during closed fire season, each unit of powered equipment used in connection with this contract, including automobiles, trucks, tractors, etc., shall be equipped with serviceable tools and fire extinguishers as follows:

• Fire extinguisher, dry chemical type of not less than 2-1/2 pound capacity with a 4 BC or higher rating.

• Shovel, round point #0 lady or equal.

• Axe, 2 pounds or over, 26-inch minimum length, or one pulaski

Delivery

The Contractor shall complete all installations within 30 calendar days after being the notice to proceed.

Within 15 business days of the completion of work, the Contractor shall provide site-specific photographs clearly showing the before and after repair conditions to document compliance with applicable Best Management Practices (BMPs). The photographs should be clearly labeled with the project site name, date(s), and a description of what was being photographed. The photos shall be submitted to the BLM in a digital format and should be clearly organized and labeled.

Final Inspection and Acceptance The Contracting Officer’s Representative or designated government representative will review all work before approval and invoicing. The Government’s final project inspections shall take place 1-3 business days following the Contractor’s written notification to the CO and COR of the completion of work. At the conclusion of the work, the Contracting Officer, or their representative, will inspect all sites for conformance with the specifications and requirements. Any deficiencies noted during the inspection will be corrected by the Contractor prior to release of final payment, at no additional cost to the Government. Prior to final payment the Contractor shall properly disposed of all waste materials including excess soil, completed site resurfacing and grooming of staging and storage areas, and submitted project photographs and project reports.

Work Schedule

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The schedule shall be submitted at the pre-work conference. When requested by the CO or COR, submit an updated work schedule within 3 calendar days. As a minimum, the estimated start and completion dates shall be shown in the estimate.

SOW 6.0 Government-Furnished Property, Materials, Services

General:

The Contractor shall furnish all personnel, materials, equipment, supplies, facilities, transportation, tools, materials, supervision, and other items and non-personal services necessary to perform the work tasks defined in this Performance Work Statement, except for those items specified as government-furnished.

Materials, Equipment, Services:

The Government will not provide any materials, equipment or services for the contractor’s use in performing the tasks outline within this contract.

Utilities:

The Government will provide all utilities in the facility will be available for the contractor’s use in performance of tasks outlined here

The Contractor shall instruct employees in utilities conservation practices. The contractor shall be responsible for operating under conditions that preclude the waste of utilities, which include turning off the water faucets or valves after using the required amount to accomplish the work.

SOW 7.0 Security and Administrative Matters

Security:

The Contractor shall be responsible for safeguarding all Government property provided for Contractor use or under their control, including securing all facilities the Contractor may access after normal business hours.

Contractor shall coordinate work schedule with Contracting Officers Representative to minimize public and employee ingress/egress to the building.

Material Security

The Contractor shall be responsible for securing all materials, tools, and equipment at the job site in a manner that ensures their safety and protection from damage, theft, or unauthorized access. The Contractor must implement

SOW Page 9 appropriate measures to prevent the loss, damage, or deterioration of materials during storage and handling on-site, including, but not limited to, the use of locks, fences, weatherproof coverings, or other methods as deemed necessary. The Contractor shall also ensure that materials are stored in compliance with safety regulations, and that the job site remains organized and clear of hazards at all times. Any materials that are left unsecured or exposed to risk may result in a delay of the project and/or additional costs, for which the Contractor will be held responsible.

Safety:

The Contractor shall not require, or allow any employee, engaged in the performance of this Contract to work under conditions which are unsanitary, hazardous, or dangerous to his/her health or safety, as determined under safety and health standards promulgated by the Secretary of Labor under Section 107 of the Contract Work Hours and Safety Standards Act (40 U.S.C. 327 et seq.) as amended and other Federal, State and applicable local government safety standards.

Department of Labor Code of Federal Regulations Title 29 and other Federal, State and local government safety standards will apply in its entirety to the Contractor.

Examples of applicable safety standards are OSHA 29 CFR 1910, OSHA 29 CFR 1926, California Title 19, "Public Safety", California Title 8, "General Industry Safety Orders", and 41 CFR, Subpart B, "Public Contracts, General Safety and Health Standards."

The contractor shall also use the “BLM SAFETY AND HEALTH STANDARDS” (The Yellow Book) for reference.

Should the contractor fail to comply with any of these standards and regulations, the contractor shall be found to have defaulted on the terms of the contract.

Emergency Response:

Response to emergency service calls outside of the normal business hours shall not exceed four (4) hours regardless of the time during the day or night, weekends, or holidays.

Response to emergency service during normal business hours shall not exceed two (2) hours.

Response is defined as having all personnel and equipment required to correct an emergency at the site of the emergency or at a pre-approved staging area, ready, willing, and able to perform the emergency work. The Contractor will provide a draft emergency response plan prior to Contract start date.

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Emergency Services:

On occasion, services may be required to support an activation or exercise of contingency plans outside the normal business hours described above. The Contractor's responsibilities for emergency support will be in accordance with the contingency plan.

Hazardous Materials and Hazardous Response:

The Contractor will conform to all Bureau, Federal, State, and local regulations in the use and disposal of hazardous materials and hazardous waste. The Contractor will provide the appropriate response to any emergency involving hazardous materials at any of the facilities covered by this Contract. The Contractor will provide proof/certification of its personnel qualified to work with hazardous materials and wastes to the Bureau. The Contractor will notify the Bureau immediately upon discovering a release of hazardous waste into the environment.

Public contact:

Contractor personnel may encounter adjacent landowners or members of the public during the performance of their work.

Contractor personnel will present a professional appearance and be able to provide appropriate identification, including display of proper identification by each employee.

All Contractor and subcontractor personnel shall comply with all Federal and State laws relative to citizenship.

Contractor personnel shall inform any trespassers along the right of way of hazards and, as necessary and appropriate, ask trespassers to leave fenced off or restricted areas.

If Contractor personnel may encounter emergency personnel, policemen, or firemen along the right of way, the Contractor personnel shall notify the On-Site Foreman

If Contractor personnel encounter the news media, they should refer all questions to the On-Site Foreman, who shall keep the COR informed of all news media contacts.

Government Observations:

Government personnel other than COR may from time to time observe, photograph, or otherwise record Contract operations.

However, these personnel will not interfere with Contractor performance.

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Regular Work Hours:

The performance period established for this contract is based upon all work being conducted during regular working hours between 8:00am and 4:30pm, Monday through Friday, excluding government holidays.

If the Contractor desires to carry on work outside regular hours, including Saturdays, Sundays, and government holidays, a request must be submitted to the COR in sufficient time to allow satisfactory arrangements to be made for access to the work site.

Communications:

“Time” for communications received after 3:00pm, after 12:00 pm locally on Fridays, or after 12:00 pm locally prior to a holiday will not start until the next business day. All times are local Pacific Standard Time.

Federal Holidays:

The following Federal Legal Holidays are observed:

New Year’s Day Martin Luther King, Jr. Day President’s Day Memorial Day Juneteenth Independence Day Labor Day Columbus Day Veterans Day Thanksgiving Day Christmas Day

Fire Danger Season:

If the Contracting Officer Representative (COR) allows the Contractor to continue work during periods of declared fire danger or season, the Contractor shall comply with all applicable state laws relating to fire prevention and with all special conditions of work as directed by the COR.

SOW 8.0 Technical Exhibits and Definitions

Standard Definitions:

Physical Condition

The Physical appearance of Federal equipment or facilities that considers cracks, chips, dents, abrasions, rust, corrosion, general cleanliness, vibration, operating temperature, and discoloration and other items as identified by the COR. Physical condition may be determined by visual as well as diagnostic means.

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Contracting Officer (CO)

The Secretary of the Interior or designated authorized representative who is the only agent capable of signing a federal award or obligating funds.

Contracting Officer’s Representative (COR)

The Contracting Officer’s designated representative as indicated in a delegation of authority letter.

Quality Assurance (QA)

Surveillance of Contractor performance to determine performance requirements are met.

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Exhibit 1: Site and Installation Location Maps

Mono Basin Fire Station/ Topaz Fire Station 14

Mono Basin Fire Station/ Topaz Fire Station 15

Mono Basin Fire Station/ Topaz Fire Station 16

Mono Basin Fire Station/ Topaz Fire Station 17

Exhibit 2: Photo Log

Photo 1 Mono Basin Barracks South Wall Before Storms

Photo 2 Mono Basin Barracks West Wall Before Storms

Photo 3 Mono Basin Barracks Typical Roof Penetration East Wall Before

Storms Photo 4

Mono Basin Barracks Snow Guard Location

Mono Basin Fire Station/ Topaz Fire Station 18

Photo 5 Mono Basin Barracks North Wall Before Storms

Photo 6 Mono Basin Barracks East Wall Center Point Before Storms

Photo 7

Mono Basin Barracks East Roof Snow Guard Before Storms, area of snow guard installation above condenser

Photo 8 Mono Basin Barrack West Wall Gutter Damage and missing downspout

Mono Basin Fire Station/ Topaz Fire Station 19

Photo 9

Mono Basin Barracks Northeast Wall Storm Damage Missing downspout Photo 10

Mono Basin Barracks East Wall Storm Damage to Gutters

Photo 11

Mono Basin Barracks East Roof Snow guard Torn Off area of snow guard installation

Photo 12 Mono Basin Barrack West Wall

Mono Basin Fire Station/ Topaz Fire Station 20

Photo 13

Mono Basin Fire Station Garage Photo 14

Mono Basin Fire Station Garage South wall

Photo 15 Mono Basin Fire Station Garage South East wall, area of snow guard installation above man door

Photo 16 Mono Basin Fire Station Garage North Eash wall

Mono Basin Fire Station/ Topaz Fire Station 21

Photo 17

Mono Basin Fire Station Garage North Wall Photo 18

Mono Basin Fire Station Garage West wall, area of snow guard installation above man door and above condenser

Photo 19 Topaz Fire Station Residential Barracks and Roof Penetrations

Photo 20 Topaz Fire Station Residential Barracks Gutter Damage and Location of Snow Guard reinstallation.

Mono Basin Fire Station/ Topaz Fire Station 22

Photo 21

Topaz Fire Station Garage Gutter Damage Photo 22

Photo 23

Photo 24 Topaz Fire Station Garage Gutter Damage and Location of New Snow

Guard Installation

FLAS

Exhibit 3 Asbuilts

Exhibit 4: Specs

SECTION 07 60 00 FLASHING AND SHEET METAL

PART 1 GENERAL

1.1 REFERENCES

A. 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.

1.2 GENERAL REQUIREMENTS

A. Finished sheet metal assemblies must form a weathertight enclosure without waves, warps, buckles, fastening stresses or distortion, while allowing for expansion and contraction without damage to the system. The sheet metal installer is responsible for cutting, fitting, drilling, and other operations in connection with sheet metal modifications required to accommodate the work of other trades. Coordinate installation of sheet metal items used in conjunction with roofing with roofing work to permit continuous, uninterrupted roofing operations.

1.3 SUBMITTALS

A. Government approval is required for submittals with a "G" designation; submittals not having a "G" designation are for Contractor Quality Control approval. For information only.

When used, a designation following the "G “designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33

00 SUBMITTAL PROCEDURES:

1. SD-02 Shop Drawings

a. AEGutters; G, AE

b. Downspouts; G

1.4 DELIVERY, HANDLING, AND STORAGE

A. Package and protect materials during shipment. Uncrate and inspect materials for damage, dampness, and wet-storage stains upon delivery to the job site. Remove from the site and replace damaged materials that cannot be restored to like-new condition. Handle sheet metal items to avoid damage to surfaces, edges, and ends. Store materials in dry, weather-tight, ventilated areas until installation.

PART 2 PRODUCTS

2.1 MATERIALS

A. Do not use lead, lead-coated metal, or galvanized steel. Use any metal listed by SMACNA 1793 for a particular item, unless otherwise indicated. Provide materials, thicknesses, and configurations in accordance with SMACNA 1793 for each material. Different items need not be of the same metal, except that if copper is selected for any exposed item, all exposed items must be copper, and that contact between dissimilar metals must be avoided.

B. Furnish sheet metal items in 8 to 10 foot lengths. Single pieces less than 8 feet long may be used to connect to factory-fabricated inside and outside corners, and at ends of runs. Factory fabricate corner pieces with minimum

C. 12 inch legs. Provide accessories and other items essential to complete the sheet metal installation.

Provide accessories made of the same or compatible materials as the items to which they are applied. Fabricate sheet metal items of the materials specified below and to the gage, thickness, or weight shown in Table I at the end of this section. Provide sheet metal items with mill finish unless specified otherwise. Where more than one material is listed for a particular item in Table I, each is acceptable and may be used, except as follows:

D. Exposed Sheet Metal Items

1. Must be of the same material. Consider the following as exposed sheet metal: gutters, including hangers; downspouts; gravel stops and fascia; cap, valley, steeped, base, and eave flashings and related accessories.

E. Drainage

1. Do not use copper for an exposed item if drainage from that item will Passover other metal surfaces. In addition to the metals listed in Table I, lead-coated copper may be used for such items.

F. Copper, Sheet and Strip

1. Provide in accordance with ASTM B370, cold-rolled temper, H 00 (standard).

2. Steel Sheet, Zinc-Coated (Galvanized) Provide in accordance with ASTM

A653/A653M.

3. Finishes

a. Provide exposed exterior sheet metal a baked on, factory applied color coating of polyvinylidene fluoride (PVF2) or approved equal fluorocarbon coating. Dry film thickness of coatings must be 0.8 to 1.3 mils. Color to be selected from manufacturer's full range of "cool roof" color choices manufacturer's standard range of color choices manufacturer’s full range of color choices as indicated on the Drawings. Field applications of color coatings are prohibited and will be rejected.

G. Solder

1. Provide in accordance with ASTM B32, 95-5 tin-antimony.

H. Reglets

1. Polyvinyl Chloride Reglets

2. Provide in accordance with ASTM D1784, Type II, Grade 1, Class 14333-D, 0.075 inch minimum thickness.

I. Bituminous Plastic Cement

1. Provide in accordance with ASTM D4586/D4586M, Type I.

J. Roofing Felt

1. Provide in accordance with ASTM D226/D226M Type I Type II.

K. Asphalt Primer

1. Provide in accordance with ASTM D41/D41M.

L. Fasteners

1. Use the same metal as, or a metal compatible with the item fastened. Use stainless steel fasteners to fasten. Confirm compatibility of fasteners and items to be fastened to avoid galvanic corrosion due to dissimilar materials.

PART 3 EXECUTION

3.1 INSTALLATION

A. Metal Roofing3.1.1.1 Standing-seam Method

1. Make standing seams parallel with slope of roof. Fabricate sheets into long lengths at shop by locking short dimensions together and thoroughly soldering joints thus formed. In applying metal, turn up one edge of course at each side seam at right angles 1.5 inch. Then install 2 by 3 inch cleats spaced 12 inches apart by fastening one end of each cleat to roof with two one inch long nails and folding roof end back over nail heads. Turn end adjoining turned-up side seam up over upstanding edge of course. Turn up adjoining edge of next course 1.75 inches and abutting upstanding edges locked, turned over, and flattened against one side of standing seam. Make standing seams straight, rounded neatly at the top edges, and stand about one inch above roof deck. All sheets must be same length, except as required to complete run or maintain pattern. Locate transverse joints of each panel half way between joints in adjacent sheets. Align joints of alternate sheets horizontally to produce uniform pattern, as shown in SMACNA 1793.

B. Workmanship

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

2. Make surfaces to receive sheet metal plumb and true, clean, even, smooth, dry, and free of defects and projections. For installation of items not shown in detail or not covered by specifications conform to the applicable requirements of SMACNA 1793, Architectural Sheet Metal Manual. 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. Join sheet metal items together as shown in Table

II.

C. Nailing

1. Confine nailing of sheet metal generally to sheet metal having a maximum width of 18 inches. Confine nailing of flashing to one edge only. Space nails evenly not over 3 inch on center and approximately 1/2 inch from edge unless otherwise specified or indicated. Face nailing will not be permitted. Where sheet metal is applied to other than wood surfaces, include in shop drawings, the locations for sleepers and nailing strips required to secure the work. Secure flashing at one-half the normal interval to ensure a wind-resistant installation.

D. Cleats

1. Provide cleats for sheet metal 18 inches and over in width. Space cleats evenly not over 12 inches on center unless otherwise specified or indicated. Unless otherwise specified, provide cleats of 2 inches wide by 3 inches long and of the same material and thickness as the sheet metal being installed. Secure one end of the cleat with two nails and the cleat folded back over the nail heads. Lock the other end into the seam. Where the fastening is to be made to concrete or masonry, use screws and drive in expansion shields set in concrete or masonry. Pre-tin cleats for soldered seams.

E. Bolts, Rivets, and Screws

1. Install bolts, rivets, and screws where indicated or required. Provide compatible washers where required to protect surface of sheet metal and to provide a watertight connection.

Provide mechanically formed joints in aluminum sheets

0.040 inches or less in thickness.

F. Seams

1. Straight and uniform in width and height with no solder showing on the face.

2. Flat-lock Seams

3. Finish not less than 3/4 inch wide.

4. Lap Seams

a. Finish soldered seams not less than one inch wide. Overlap seams not soldered, not less than 3 inches.

b. Loose-Lock Expansion Seams

i. Not less than 3 inches wide; provide minimum one inch movement within the joint.

Completely fill the joints with the specified sealant, applied at not less than 1/8 inch thick bed.

c. Standing Seams

i. Not less than one inch high, double locked without solder.

d. Flat Seams

i. Make seams in the direction of the flow.

G. Soldering

1. Where soldering is specified, apply to steel, zinc-coated steel, and stainless steel items.

Pre-tin edges of sheet metal before soldering is begun.

a. Edges

i. Scrape or wire-brush the edges of lead-coated material to be soldered to produce a bright surface. Flux brush the seams in before soldering. Treat with soldering acid flux the edges of stainless steel to be pre-tinned.

H. Protection from Contact with Dissimilar Materials

1. Copper or Copper-bearing Alloys

a. Paint with heavy-bodied bituminous paint surfaces in contact with dissimilar metal, or separate the surfaces by means of moisture proof building felts.

I. Expansion and Contraction

1. Provide expansion and contraction joints at not more than 32 foot intervals for aluminum and at not more than 40 foot intervals for other metals.

2. Provide an additional joint where the distance between the last expansion joint and the end of the continuous run is more than half the required interval. Space joints evenly. Join extruded aluminum gravel stops and fascia by expansion and contraction joints spaced not more than 12 feet apart.

J. Base Flashing

1. Lay the base flashings with each course of the roof covering, shingle fashion, where practicable, where sloped roofs abut curbs, walls, or other vertical surfaces. Extend up vertical surfaces of the flashing not less than 8 inches and not less than

2. 4 inches under the roof covering. Where finish wall coverings form a counterflashing, extend the vertical leg of the flashing up behind the applied wall covering not less than 6 inches.

3. Overlap the flashing strips or shingles with the previously laid flashing not less than 3 inches.

Fasten the strips or shingles at their upper edge to the deck. Horizontal flashing at vertical surfaces must extend vertically above the roof surface and fastened at their upper edge to the deck a minimum of 6 inches on center with hex headed, galvanized shielded screws a minimum of 2 inch lap of any surface. Solder end laps and provide for expansion and contraction. Extend the metal flashing over crickets at the up-slope side of chimneys, curbs, and similar vertical surfaces extending through sloping roofs, the metal flashings. Extend the metal flashings onto the roof covering not less than 4.5 inches at the lower side of vertical surfaces extending through the roof decks. Install and fit the flashings so as to be completely weathertight. Provide factory-fabricated base flashing for interior and exterior corners. Do not use metal base flashing on built-up roofing.

K. Counterflashing

1. Except where indicated or specified otherwise, insert counterflashing in reglets located from 9 to 10 inches above roof decks, extend down vertical surfaces over upturned vertical leg of base flashings not less than 3 inches. Fold the exposed edges of counterflashing’s 1/2 inch. Where stepped counter flashings are required, they may be installed in short lengths a minimum 8 inches by 8 inches8 inches by 8 inches or may be of the preformed single piece type. Provide end laps in counter flashings not less than 3 inches and make it weathertight with plastic cement. Do not make lengths of metal counter flashings exceed 10 feet. Form flashings to the required shapes before installation. Factory form corners not less than 12 inches from the angle. Secure the flashings in the reglets with lead wedges and space not more than 18 inches apart; on short runs, place wedges closer together. Fill caulked-type reglets or raked joints which receive counterflashing with caulking compound.

Turn up the concealed edge of counter flashings built into masonry or concrete walls not less than 1/4 inch and extend not less than 2 inches into the walls. Install counter flashing to provide a spring action against base flashing.

L. Metal Reglets

1. Keep temporary cores in place during installation. Ensure factory fabricated caulked type or friction type, reglets have a minimum opening of1/4 inch and a minimum depth of 1-1/4 inch, when installed.

2. Caulked Reglets

a. Wedge flashing in reglets with lead wedges every 18 inches, caulked full and solid with an approved compound.

3. Friction Reglets

a. Install flashing snap lock receivers at 24 inches on center maximum. When flashing has been inserted the full depth of the slot, caulk the slot, lock with wedges, and fill with sealant.

M. Polyvinyl Chloride Reglets for Temporary Construction

1. Rigid polyvinyl chloride reglets may be provided in lieu of metal reglets for temporary construction.

N. Gravel Stops and fascia

1. Prefabricate in the shapes and sizes indicated and in lengths not less than 8 feet. Extend flange at least 4 inches onto roofing. Provide prefabricated, mitered corners internal and external corners. Install gravel stops and fascia after all plies of the roofing membrane have been applied, but before the flood coat of bitumen is applied. Prime roof flange of gravel stops and fascia on both sides with an asphalt primer. After primer has dried, set flange on roofing membrane and strip-in. Nail flange securely to wood nailer with large-head, barbed-shank roofing nails 1.5 inch long spaced not more than 3 inches on center, in two staggered rows.

2. Edge Strip

a. Hook the lower edge of fascia at least 3/4 inch over a continuous strip of the same material bent outward at an angle not more than 45 degrees to form a drip. Nail hook strip to a wood nailer at 6 inches maximum on center. Where fastening is made to concrete or masonry, use screws spaced 12 inches on center driven in expansion shields set in the concrete or masonry.

b. Where horizontal wood nailers are slotted to provide for insulation venting, install strips to prevent obstruction of vent slots. Where necessary, install strips over 1/16 inch thick compatible spacer or washers.

3. Joints

a. Leave open the section ends of gravel stops and fascia 1/4 inch and backed with a formed flashing plate, mechanically fastened in place and lapping each section end a minimum of 4 inches set laps in plastic cement. Face nailing will not be permitted.

Install prefabricated aluminum gravel stops and fascia in accordance with the manufacturer's printed instructions and details.

O. Metal Drip Edges

1. Provide a metal drip edge, designed to allow water run-off to drip free of underlying construction, at eaves and rakes prior to the application of roofing shingles. Apply directly on the wood deck at the eaves and over the underlay along the rakes. Extend back from the edge of the deck not more than 3 inches and secure with compatible nails spaced not more than 10inches on center along upper edge.

P. Gutters

1. The hung type of shape indicated and supported on underside by brackets that permit free thermal movement of the gutter. Provide gutters in sizes indicated complete with mitered corners, end caps, outlets, brackets, and other accessories necessary for installation. Bead with hemmed edge or reinforce the outer edge of gutter with a stiffening bar not less than 3/4by 3/16 inch of material compatible with gutter. Fabricate gutters in sections not less than 8 feet. Lap the sections a minimum of one inch in the direction of flow or provide with concealed splice plate 6 inches minimum. Join the gutters, other than aluminum, by riveted and soldered joints. Join aluminum gutters with riveted sealed joints. Provide expansion-type slip joints midway between outlets. Install gutters below slope line of the roof so that snow and ice can slide clear. Support gutters on adjustable hangers spaced not more than 30 inches on center as indicated by continuous cleats and or by cleats spaced not less than 36 inches apart. Adjust gutters to slope uniformly to outlets, with high points occurring midway between outlets. Fabricate hangers and fastenings from compatible metals.

Q. Downspouts

1. Space supports for downspouts according to the manufacturer's recommendation for the wood masonry or steel substrate. Types, shapes and sizes are indicated. Provide complete including elbows and offsets.

2. Provide downspouts in approximately 10 foot lengths. Provide end joints to telescope not less than 1/2 inch and lock longitudinal joints. Provide gutter outlets with wire ball strainers for each outlet. Provide strainers to fit tightly into outlets and be of the same material used for gutters.

3. Keep downspouts not less than one inch away from walls. Fasten to the walls at top, bottom, and at an intermediate point not to exceed 5 feet on center with leader straps or concealed rack-and-pin type fasteners. Form straps and fasteners of metal compatible with the downspouts.

a. Terminations

i. Neatly fit into the drainage connection the downspouts terminating in drainage lines and fill the joints with a portland cement mortar cap sloped away from the downspout. Provide downspouts terminating in splash blocks with elbow-type fittings. Provide splash pans as specified.

R. Flashing for Roof Drains

1. Provide a 30 inches square sheet indicated. Taper insulation to drain from 24 inches out.

Set flashing on finished felts in a full bed of asphalt roof cement, ASTM D4586/D4586M.

Heavily coat the drain flashing ring with asphalt roof cement. Clamp the roof membrane, flashing sheet, and stripping felt in the drain clamping ring. Secure clamps so that felts and flashing are free of wrinkles and folds. Retrofit roof drains must conform to ANSI/SPRI

RD-1.

S. Splash Pans

1. Install splash pans lapped with horizontal roof flanges not less than 4 inches wide to form a continuous surface. Bend the rear flange of the pan to contour of can't strip and extend up 6 inches under the side wall covering or to height of base flashing under counterflashing.

Bed the pans and roof flanges in plastic bituminous cement and strip-flash as specified.

T. Expansion Joints

1. Provide expansion joints for roofs, walls, and floors as specified indicated. Provide expansion joints in continuous sheet metal at 40 foot intervals for copper and stainless steel and at 32 foot intervals for aluminum, aluminum gravel stops and fascia which must have expansion joints at not more than 12 foot spacing. Provide evenly spaced joints. Provide an additional joint where the distance between the last expansion joint and the end of the continuous run is more than half the required interval spacing. Conform to the requirements of Table I.

2. Roof Expansion Joints

a. Consist of curb with wood nailing members on each side of joint, bituminous base flashing, metal counterflashing, and metal joint cover. Bituminous base flashing is specified in Roofing Section. Provide counterflashing as specified in paragraph COUNTERFLASHING, except as follows: Provide counterflashing with vertical leg of suitable depth to enable forming into a horizontal continuous cleat. Secure the inner edge to the nailing member. Make the outer edge projection not less than one inch for flashing on one side of the expansion joint and be less than the width of the expansion joint plus one inch for flashing on the other side of the joint. Hook the expansion joint cover over the projecting outer edges of counterflashing. Provide roof joint with a joint cover of the width indicated. Hook and lock one edge of the joint cover over the shorter projecting flange of the continuous cleat, and the other edge hooked over and loose locked with the longer projecting flange. Joints are specified in Table II.

3. Floor and Wall Expansion Joints

a. Provide U-shape with extended flanges for expansion joints in concrete and masonry walls and in floor slabs.

U. Flashing at Roof Penetrations and Equipment Supports

1. Provide metal flashing for all pipes, ducts, and conduits projecting through the roof surface and for equipment supports, guy wire anchors, and similar items supported by or attached to the roof deck. Goose-necks, rain hoods, power roof ventilators, and are specified in .

V. Single Pipe Vents

1. See Table I, footnote (d). Set flange of sleeve in bituminous plastic cement and nail 3 inches on center. Bend the top of sleeve over and extend down into the vent pipe a minimum of 2 inches. For long runs or long rise above the deck, where it is impractical to cover the vent pipe with lead, use a two-piece formed metal housing. Set metal housing with a metal sleeve having a 4 inches roof flange in bituminous plastic cement and nailed 3 inches on center. Extend sleeve a minimum of 8 inches above the roof deck and lapped a minimum of 3 inches by a metal hood secured to the vent pipe by a draw band. Seal the area of hood in contact with vent pipe with an approved sealant.

W. Copings

1. Provide coping with locked and soldered seam. Terminate outer edges in edge strips. Install with sealed lap joint cover plate joints standing seam joints as indicated.

3.2 PAINTING

A. Touch ups in the field may be applied only after metal substrates have been cleaned and pretreated in accordance with manufacturer's written instructions and products.

B. Field-paint sheet metal for separation of dissimilar materials.

3.3 CLEANING

A. Clean exposed sheet metal work at completion of installation. Remove grease and oil films, handling marks, contamination from steel wool, fittings and drilling debris, and scrub-clean.

Free the exposed metal surfaces of dents, creases, waves, scratch marks, and solder or weld marks.

3.4 REPAIRS TO FINISH

A. Scratches, abrasions, and minor surface defects of finish may be repaired in accordance with the manufacturer's printed instructions and as approved. Repair damaged surfaces caused by scratches, blemishes, and variations of color and surface texture. Replace items which cannot be repaired.

3.5 FIELD QUALITY CONTROL

A. Remove work that is not in compliance with the contract and replace or correct. Include quality control, but not be limited to, the following:

1. Observation of environmental conditions; number and skill level of sheet metal workers;

condition of substrate.

2. Verification that specified material is provided and installed.

3. Inspection of sheet metalwork, for proper size(s) and thickness(es), fastening and joining, and proper installation.

B. Procedure

1. Submit for approval prior to start of roofing work. Include a checklist of points to be observed. Document the actual quality control observations and inspections. Furnish a copy of the documentation to the Contracting Officer at the end of each day.

TABLE I. SHEET METAL WEIGHTS, THICKNESSES, AND GAGES

Sheet Metal Items Zinc-Coated Steel, U.S.

Std.Gage

Building Expansion Joints

Cover 24 Waterstop-bellows or flanged, U-type. -

Downspouts and leaders 24

Downspout clips and anchors - Downspout straps, 2-inch - Flashings:

Base 24

Cap (Counter-flashing) 26

Roof drain

Pipe vent sleave (d)

Coping -

Gravel stops and fascia:

Gutters:

Gutter section 24

Continuous cleat 24

TABLE II. SHEET METAL JOINTS

TYPE OF JOINT

Item Designation Zinc-Coated Steel Remarks Base One inch

3 inch lap for expansion joint

Cap-in reglet 3 inch lap

Reglets Butt joint

Edge strip Butt --

Gravel stops:

Extrusions --

Sheet, smooth Butt with 1/4 inch space

Sheet, corrugated Butt with 1/4 inch space Use sheet flashing beneath and a cover plate or a combination unit

Gutters 1.5 inch lap, riveted and soldered

Aluminum producers recommended hard setting sealant for locked aluminum joints.

(a) Provide a 3 inch lap elastomeric flashing with manufacturer's recommended sealant.

TABLE I. SHEET METAL WEIGHTS, THICKNESSES, AND GAGES

Sheet Metal Items Zinc-Coated Steel, U.S. Std.Gage

Hangers, dimensions -

Joint Cover plates (See Table II) 24

Reglets (c) -

Splash pans -

(a)

(b) May be lead weighing 4 pounds per square foot.

(c) May be polyvinyl chloride.

(d) 2.5 pound minimum lead sleeve with 4 inch flange. Where lead sleeve is impractical, refer to paragraph SINGLE PIPE VENTS for optional material.

TABLE II. SHEET METAL JOINTS

TYPE OF JOINT

Item Designation Zinc-Coated Steel Remarks Flashings

(b) Seal Polyvinyl chloride reglet with manufacturer's recommended sealant.

-- End of Section --

FLASHING AND SHEET METAL

SECTION 07 60 00 [1]

SECTION 07 60 00 FLASHING AND SHEET METAL

PART 1 GENERAL

1.1 REFERENCES

A. The publications listed below form a part of this specification…