Project_Specifications.pdf

Amendment 6

Project Specifications

NCSC OPERATIONS SPECIFICATIONS

SECTION NO. DESCRIPTION

01010 SUMMARY OF WORK

01025 METHOD OF MEASUREMENT

01043 JOB SITE ADMINISTRATION

01060 REGULATORY REQUIREMENTS

01711 CLEAN UP AND DISPOSAL

01741 MANUFACTURER’S WARRANTIES

07574 SPRAYED POLYURETHANE FOAM SYSTEM

SECTION 01010

SUMMARY OF WORK

PART 1 - GENERAL

1.01 SCOPE OF WORK

The work of this Section shall include all labor, materials and appliances required to complete all of the work shown on the drawings and/or specified hereunder.

1.02 WORK INCLUDED

a. Preparation and submittal of required samples, certifications and manufacturer’s literature and warranty.

b. Inspection of roof sheathing and joists for dry rot and replace as approved.

c. Replace existing skylights with like kind skylights in accordance with OSHA standards.

d. Contractor shall raise curb heights as needed for skylights and other mounted equipment according to meet current codes and industry standards.

e. Preparation of roof to receive roofing system including priming.

f. Installation of sheet metal work relative to roofing system.

g. Application of

a. SPRAYED POLYURETHANE FOAM WITH ELASTOMERIC GRANULIZED

PROTECTIVE LOCK COAT ROOF SYSTEM:

i. sprayed-applied UL fire rated polyurethane foam

ii. UL fire rated acrylic elastomeric coating system

h. Non slippery walkways in contrasting color of topcoat

i. Warranty related to roofing system.

j. Clean up related to work of this section.

k. Coordinate with COR if any equipment capable of reaching a height above the roof will be used in order to request a Notice to Airmen (NOTAM). A 24 hour notification is required.

1.02 Schedule B of Schedule of Items

A schedule B in Section B is included for installing a Class A fire rated Roof Deck prior to installation of the spray foam system.

1.03 RELATED WORK

a. Sheet metal

b. Carpentry

c. Plumbing

d. Electrical

e. HVAC

1.04 CODES AND STANDARDS

a. All work shall be done in accordance with the 2015 International Building Code (IBC), 2015 Uniform Plumbing Code (UPC), 2015 Uniform Mechanical Code (UMC), 2014 National Electrical Code (NEC), and as specified elsewhere herein.

1.05 GOVERNMENT FURNISHED

a. Power and water are on site for use by the contractor.

1.06 WORK COORDINATION

a. The contractor shall coordinate work with the Contracting Officer Representative (COR) so as to minimize the disturbance to the everyday work at the site and building. No work to be done during wet weather without COR approval.

1.07 SUBMITTALS

a. Manufacturer’s Literature: Submit the manufacturer’s material technical bulletins regarding application and safety information and instructions for each product.

Submit SDS to the Contracting Officer Representative (COR) for on-site review.

b. Each submittal shall consist of one hard copy and one electronic PDF format, submitted two weeks prior to the start of work. The Contracting Officer Representative shall have the full two weeks to review and make comments. If the submittal is rejected, the submittal shall be updated, corrected, or clarified as needed by the contractor and submitted for review/approval. Resubmittals shall also be submitted a minimum of two weeks before start of work for proper review. Below is an additional list of required submittals:

a. Drawing of roof layer cross section

b. Provide a roof material sample

c. Safety Plan

d. Construction Schedule

c. Must submit a site-specific safety plan prior to start of work and be approved by COR.

1.07 INSPECTION BY MANUFACTURER

A representative from the coating manufacturer shall inspect the roof after completion to assure that the detail work at the protrusions, drains, parapets and edges has been completed in conformance with good practice. The inspector shall also check the thickness of the coating with an optical comparator.

1.08 SAFETY

The contractor has sole responsibility for the safety of the workers and all other person who may be affected by the work.

END OF SECTION

SECTION 01025

METHOD OF MEASUREMENT

1.01 SCOPE: This section defines the terms associated with the method of measurement for determining final payment under the terms of the contract.

1.02 MEASUREMENT AND PAYMENT: No separate measurement or payment will be made for the work specified in this section.

PART 2 - PRODUCTS

Not Applicable

PART 3 - EXECUTION

3.01 The following method of measurement for determining final payment is designated on the Schedule of Items for each pay item:

A. Lump Sum Quantity (LS):

1. These quantities denote one complete unit of work as required by or described in the contract, including necessary materials, equipment, and labor to complete the job. They will not be measured.

SECTION 01043

JOB SITE ADMINISTRATION

1.01 SCOPE: The work of this section consists of traffic control, storage and protection of construction materials, coordination of the various work trades, safety, security, dust control, parking control, and protection of finished work.

Not Applicable

3.01 TRAFFIC CONTROL: The Contractor shall control traffic in and out of the project site so it does not interfere with normal operations at the Northern California Service Center Operations building. Coordinate traffic flow with the Contracting Officer Representative.

3.02 TRANSPORTATION AND DELIVERIES: The Contractor shall arrange deliveries of materials in accordance with construction schedules and coordinate with the Contracting Officer Representative to avoid conflict with other tenants and other work conditions at the site.

3.03 STORAGE AND PROTECTION OF CONSTRUCTION MATERIAL:

A. The Contractor shall:

1. Store products to be used in the work in such a manner as to protect the products from damage.

2. Maintain packaged materials with seals unbroken and labels intact until time of use.

3. Protect roof work from water or other damage during construction.

B. The Contracting Officer Respresentative may reject as non-complying any damaged product or material. If product or material is rejected, Contractor shall remove and replace products without additional cost to the government.

C. The Contracting Officer Respresentative will designate a storage area within the project site. The storage of materials, vehicles and equipment shall be confined to this area unless aprroved otherwise by the Contacting Officer Representative.

3.04 COORDINATION OF WORK TRADES: The Contractor shall coordinate the work of all trades to ensure completion of the project within the contract time.

3.05 SAFETY: Safety for all persons on the job site shall be the sole responsibility of the

Contractor.

3.06 SECURITY AND WORK SITE ACCESS:

A. The Contractor, at all times, shall be responsible for providing security for his equipment and materials delivered to the jobsite.

B. The Contractor will have access to the project site during normal work hours. The Contractor shall make arrangements with the Contracting Officer Representatives for access to the project site during off-duty hours; however, such access shall not jeopardize the security at the NCSC Operations building.

C. The Contractor shall be responsible for all damages occurring during these off-duty hours which are the result of his actions or his failure to provide security.

3.07 CONSTRUCTION VEHICLES: The Contracting Officer Representative will designate an area for construction related vehicle parking. The Contractor will be required to keep all construction related vehicles in this area.

3.08 PROTECTION OF GOVERNMENT PROPERTY: The Contractor shall not damage the other buildings, trees, or other Government property at the job site.

SECTION 01060

REGULATORY REQUIREMENTS

PART 1 – GENERAL

1.01 SCOPE: This section describes the codes and standards which apply to the work in this contract. Additional codes and standards may apply as specified elsewhere in the specifications.

1.02 CODES AND STANDARDS: The following codes and standards shall apply to the work in this contract:

International Building Code (IBC) Uniform Fire Code (UFC) Uniform Plumbing (UPC) Uniform Mechanical Code (UMC) National Electrical Code (NEC)

Unless otherwise specified in this contract, reference to a specific standard or specification shall mean the latest edition or amendment in affect on the date of the invitation to offer.

1.03 DEFINITIONS: Administrative Authority as used in the International Building Code and

Uniform Fire Code will be the Contracting Officer Representative.

NOT APPLICABLE

SECTION 01711

CLEAN UP AND DISPOSAL

1.01 SCOPE: This work consists of the cleanup required in areas affected by the construction, the final cleanup of the project, and the disposal of refuse and excess material resulting from construction operations.

PART 2 - PRODUCTS

3.01 EXCESS MATERIALS AND REFUSE: All refuse and unused materials generated by the Contractor's operations shall be removed from the project site and disposed of off Government land in accordance with local regulations.

3.02 CLEAN–UP DURING CONSTRUCTION: The Contractor as required to prevent accidents to personnel and protect all work in-place shall perform clean-up. Construction clean-up shall consist of the removal of all trash, scrap, debris, and excess materials from any floor space or walking surface that may cause the tripping or sliding of workers, ladders, equipment and the like. At the end of each work day, Contractor shall provide a thoroughly clean and debris free work site and dispose of all excess materials offsite in accordance with all local, state and federal regulations.

3.03 DISPOSAL: The Contractor shall provide dumpsters as necessary to handle any disposal materials from the project. The location of these dumpsters will need to be coordinated with the Contracting Officer at the start of the project. The Contractor shall be responsible for the transportation of the waste material to a landfill as well as the disposal costs

3.04 FINAL CLEAN-UP: Immediately prior to the Contractor's request for final inspection of the project, a thorough final cleanup of the entire project site shall be performed.

3.05 QUALITY OF CLEAN-UP: In addition to the normal "broom clean" requirements, the exposed surfaces of the following materials shall be cleaned as listed below:

A. Roof: Remove all dust, dirt, and debris.

B. Site: Remove all trash, debris, and disposal material. No items shall be left or discarded elsewhere on the site. Items that will be discarded shall be removed from Government property and disposed of in accordance with all applicable state and local regulations.

SECTION 01741

MANUFACTURER’S WARRANTIES

PART I – GENERAL

1.01 SCOPE: The work of this section consists of the assignment of manufacturer’s warranties for products incorporated into the work.

1.02 MEASUREMENT AND PAYMENT: No separate measurement or payment will be made for

2.01 WARRANTY AND CERTIFICATION

The material systems manufacturer shall issue a ten plus ten (10+10) year non-depreciating manufacturer’s warranty covering leakage. The material systems manufacturer is to provide materials and the contractor is to provide labor for all repairs covered under the warranty during the warranty period.

3.01 All warranties shall be executed in the name of USDA, US Forest Service, Redding, CA 96002.

SECTION 07574

SPRAYED POLYURETHANE FOAM WITH ELASTOMERIC GRANULIZED PROTECTIVE

LOCK COAT ROOF SYSTEM

PART 1 – GENERAL

1.01 SCOPE: The work of this Section shall include all labor, materials, and appliances required to complete all of the work shown on the drawings and/or specified hereunder.

PART 2 – PRODUCTS

2.01 PRIMER

a. Roof deck primer shall be water-borne, latex, asphalt based, black in color and applied at the application rate of 1/3 to 1/2 gallon per 100 square feet.

b. Galvanized metal surfaces shall be etched as recommended by the manufacturer.

2.02 POLYURETHANE FOAM

Polyurethane foam shall be a two-component polyurethane foam system formulated for use through airless equipment. The product shall have the following minimum physical properties:

PROPERTIES TEST METHOD VALUE

Density (sprayed-in-place) D-1622 2.8 pcf Compressive Strength D-1621 50-60 psi Tensile Strength D-1623 90 psi Shear Strength C-273 50-60 psi Closed Cell Content D-1940 98% K factor C-518 0.16 Flame Spread E-84 <75 Water Vapor Transmission C-355 1.8 perms Water Absorption D-2842 .017 Roof Deck Classification

(UL 790)

Combustible Deck Class B Non-Combustible Deck Class A

2.03 FLUID APPLIED ELASTOMERIC COATINGS

Base Coat and Mid-Coat Material

The base coat, mid-coat, and lock coat material shall be as follows: The elastomeric coating shall be an acrylic elastomer coating. The product shall have the following minimum physical properties:

PROPERTIES TEST METHOD VALUE

Solids by Volume D-2697 54% Solids by Weight D-2697 66% Flash Point D-56 >212°F Elongation D-2370 175% Tensile Strength D-2370 310 psi Water Swelling D-471 10% Tear Resistance (Die C) D-624 70 pli Hardness Shore A D-2240 65-75 Permeability D-1653 6 Adhesion to Foam D-903 2.9 pli wet Flexibility 1/2” Mandrel D-522 Pass Fungi Resistance G-21 Zero Dry Adhesion D-903 3.5

2.04 CAULKING OR SEALANTS

Caulking material shall be single component polyurethane elastomers such as “Vulkem- 921”, Sikaflex- 1A, or equal. Caulking of fabricated metal components or lapping metal joints shall use only the polyurethane sealants.

2.05 GRANULES

Granules shall be No. 11, white in color. Granules shall be broadcast into the mid-coat application while it is still wet using low pressure blast pots.

2.06 FLUID APPLIED ELASTOMERIC COATING THICKNESS

The base (1 gallon/square) and mid-coat (1.5 gallons/square) minimum dry mil thickness shall be 20 TDM excluding granules. The total minimum dry mil thickness including the elastomeric lock coat (2 gallons/square) shall be 36 TDM excluding granules.

2.07 EQUIPMENT

Equipment for spraying the foam shall be manufactured specifically for the application of polyurethane foam. The equipment shall be airless, capable of maintaining a 1:1 volume ratio and have primary and hose heaters. Coating equipment shall be an airless type as recommended by the coating manufacturer.

2.08 GALVANIZED SHEET METAL

a. Galvanized sheet steel shall be 24-gauge unless otherwise shown on drawings or called for in the specifications. All material shall be copper bearing and heavily galvanized. Sheet metal shall be 1.25 oz./sq. ft., hot dipped galvanized coating conforming to standards as set forth in ASTM A-525.

b. The connection between the CMU wall and roof shall be flashed and sealed according to industry standards to prevent leakage of the roof.

b. Solder shall be one-half (1/2) pure virgin lead and one-half pure tin.

c. Nails shall be galvanized and selected for their intended use.

d. Screws shall be cadmium plated oval head sheet metal screws.

e. Washers shall be 4# lead washer 1” diameter.

f. Rivets shall be soft annealed non-corrosion metal.

2.09 All primer, polyurethane foam, and coating shall be manufactured by the same manufacture providing the warranty.

3.01 ROOF AND SKYLIGHTS REMOVAL

a. Remove and properly dispose of all existing roof and insulation systems. Recycling of the old roof is preferred. Inspect roof sheathing and joists for dry rot and replace as approved by the COR.

b. Replace existing skylights with like kind skylights in accordance with OSHA standards.

c. There are 33 dome polycarbonate skylights with the following dimensions and quantities:

Dimensions Quantity 51”x75.25” 29 39”x75.5” 2 51.25”x51” 1 39”x51.25” 1

It is the contractor’s responsibility to verify quantity and size of lights.

3.02 SURFACE PREPARATION

a. Thoroughly clean the surface to be foamed. The surface shall be free from solvent, grease, dust, sediment, rocks, dirt and sticky mastic. Remove all extraneous equipment and equipment supports from the roof deck prior to installation of the sprayed polyurethane roofing system.

b. All new metal flashings and existing galvanized steel surfaces shall be primed or etched per manufacturer’s recommendations.

c. All roof surfaces are to be primed in accordance with manufacturer’s recommendations.

d. Install new perimeter edge metal and flashing as required. The metal shall be 24-gauge galvanized sheet metal.

e. All surfaces not to receive foam such as walls and roof mounted equipment shall be carefully masked with tape and paper to prevent over-spraying with foam and coating.

All coating is to be terminated in clean straight lines.

f. HVAC and Roof Mounted Equipment

1. NOTE: It shall be the responsibility of the roofing contractor to verify that all roof mounted HVAC equipment is in proper working order at the conclusion of the roofing project.

2. All conduit, gas lines, plumbing, etc shall be raised for the application of the new roofing system. After the new roof has been installed, all conduit, gas lines, plumbing, etc shall be secured to new 2 X 4 redwood blocking. The old conduit supports shall not be reused.

g. Internal Drains

1. All internal roof drains shall be flushed with water to insure that the drains are clear to the discharge level prior to starting the roofing work.

2. Remove the clamping ring from the drain bowl Apply a bead of elastomeric caulking to the drain bowl clamping ring contact areas and refasten the clamping ring with new bolts. Remove excess caulking from inside of the drain bowl and clamping ring. Mask the inside of the drain and spray a “water block” from the deck to the top of the clamping ring. Grind excess insulation flush with the top of the clamping ring. The elastomeric coating shall be applied and “back rolled” in a “picture frame” fashion to achieve double the specified thickness of coating around the water entry area Flush drains (a second time) with water to insure that the drains are clear to the discharge level after all roofing work is completed.

All internal drains shall be fined with appropriate strainers or leaf catchers.

Strainers or catchers shall be metal. Plastic strainers and leaf catchers shall not be used.

All A/C condensate lines shall run to a drain or off the roof. Condensate shall not be discharged into soil pipes or other vents.

h. Low areas over 100 square feet in size and greater than 1/2 inch deep shall be filled with foam to match the surrounding grade and prior to the application of the specified thickness of foam.

i. All soil pipes and other roof vents shall be masked and remain fully open after foaming

j. All “T” tops and other roof vents shall be raised as necessary to remain 6 inches above the new foam line.

k. New skylights shall be installed, per manufacturer’s recommendations, on curbs that provide sufficient height above the finished roof surface to prevent leakage. All skylights shall be OSHA compliant.

3.03 IF SCHEDULE B IS AWARDED: FIRE RATED CLASS A ROOF DECK

a. To implement schedule B, follow all other specs for roof preparation and install by mechanically fastening fire board foam or other approved material on roof deck to create a non-combustible, Class A deck.

3.04 APPLICATION OF SPRAYED POLYURETHANE FOAM

a. Environment Conditions

1. Wind velocity shall not exceed 12 miles per hour.

2. Wind screens shall be used throughout the project to minimize the possibility of over-spray on adjacent areas.

3. Application of sprayed polyurethane foam shall not proceed if ambient temperature is less than 50 deg. F. or if the substrate temperature is less than 60 deg. F.

4. Sprayed polyurethane foam shall not be sprayed over moist surfaces or when rain or inclement weather is imminent.

5. All foam installation shall be performed in accordance with the manufacturer’s published recommendations.

b. Spray Application

1. The sprayed polyurethane foam shall be applied in minimum one-half inch passes to achieve a minimum thickness of 2 inches.

2. Only as much area as can be brought to final thickness should be attempted in a day. Phasing of the foam is strictly forbidden.

(“Phasing” is the application of foam on one day and coming back the next day or thereafter and applying another layer of foam. This procedure often leads to the development of blisters in time) If additional foam must be added after the 24 hour period, the existing foam must be primed with neoprene primer and a minimum of 1/2 inch of foam in a single pass can be applied.

3. The foam shall be free from bumps, pinholes and ridges. The surface shall exhibit a smooth or orange peel surface texture. Popcorn or tree bark surfaces shall be deemed unacceptable

4. The foam thickness shall be checked every 500 square feet prior to the coating application.

5. The field of the polyurethane foam shall be applied in minimum ½ inch lifts to a thickness of 2 inches or as otherwise specified Polyurethane foam shall be tapered to provide positive slope to the drains. Polyurethane foam may be applied to greater thickness than 1/2-inch per lift if all other requirements and conditions are met. The maximum polyurethane foam thickness shall not exceed 4-inches. All parapet walls shall receive a minimum of 1-inch of foam and the specified protective coating. Additional foam thickness shall be applied to provide positive slope-to-drain where needed.

NOTE: Freshly sprayed foam shall be allowed to set for 15 minutes before being walked upon.

3.04 APPLICATION OF FLUID APPLIED PROTECTIVE COATING

a. Spray Application

The coating shall be uniformly applied to the surface of the sprayed polyurethane foam in three passes. A total of 36 TDM shall be applied to the roof as determined by an optical comparator.

b. Base Coat and Mid-Coat Material

The base coat shall be applied at a minimum rate of 1-gallon per 100 sq. ft. to achieve a minimum finished dry film thickness of 8 TDM. The mid-coat shall be applied at a minimum rate of 1½-gallons per 100 sq. ft. with a minimum of 40 lbs. of

no. 11 white granules embedded into the wet coating. The total thickness for the base coat and mid-coat shall be 20 TDM exclusive of granules. Coatings shall extend a minimum of three inches beyond the foam terminations.

c. Lock-Coat Material

The lock-coat shall be applied at a minimum rate of 2.0 gallons per 100 sq. ft. to a finished dry film thickness of 16 TDM. There shall not be any voids, exposed granules, or base coat showing. 100% encapsulation of granules is required. Back rolling is required. A total coating thickness of 36 dry mils shall be achieved exclusive of granules. The lock-coat shall be energy star-rated, Title 24-compliant, and white in color.

Coating materials such as Silicone, Single-Component or Catalyzed Polyurethane Elastomers, Plasticized Acrylics, Vinyls, EVA, Terpolymer and PVA materials shall not be considered.

d. Walkways

Walkways (approximately 2-3 feet wide) from the entrance to the roof to each HVAC unit and circle around each unit are to be created by broadcasting granules into the final topcoat system. Once topcoat is fully cured, back roll an additional coat of elastomeric acrylic coatings at a rate of 2.0 gallons per square. Walkways shall be of contrasting color to topcoat.

3.05 CLEAN UP: Upon completion of all work covered in this specification, the contractor shall remove all equipment, material and debris, leaving the area in an undamaged and acceptable condition.

PART 4 - WARRANTY

Upon final completion and acceptance of the work, the Contractor shall provide the USDA with a manufacturer/contractor ten plus ten (10+10) year warranty.

PART 2 - PRODUCTS