Technical Specifications for the Roof and Counterpoise Replacement at Syracuse (SYR) VOR facility in Clay NY.pdf

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Department of Transportation Federal Aviation Administration

May 22, 2023

Submitted By:

Yuriy Davydan, Civil Engineer Eastern Service Area, NAVAIDS/VISAIDS Design Center

AJW-2E14B

FAA-NE-XXXX

Specification For

PVC MEMBRANE STAINLESS STEEL MESH ROOF

SYSTEM ON SYRACUSE VORTAC FACILITY

SYRACUSE, NEW YORK

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TABLE OF CONTENTS

DIVISION 1 - GENERAL REQUIREMENTS -------------------------------------------------------------------------------- 4

SECTION 1A - SUMMARY OF THE WORK 4

1A.1 General 4 1A.2 Scope of Work 4 1A.3 Coordination 5 1A.4 Sanitary Facilities 5 1A.5 Materials 5 1A.6 Material Storage 5 1A.7 Ingress and Egress to Work Areas 5 1A.8 Cleaning 5 1A.9 Pre-Construction Meeting 6 1A.10 Project Drawings 6 1A.11 Site Visit 7 1A.12 Contractor’s Warranty 6 1A.13 Manufacturer's Warranty 6 1A.14 Contractor's Liability 7 1A.15 Workmanship 7 1A.16 Work Permits 7 1A.17 Asbestos Free Certification 7 1A.18 Hazardous Material and Safety 8

DIVISION 2 - SITE WORK ------------------------------------------------------------------------------------------------------ 8

SECTION 2A - EQUIPMENT REMOVAL 8

2A.1 Scope of Work 8 2A.2 TACAN Antenna Removal 8 2A.3 Fiberglass Antenna Shelter Removal 9 2A.4 Azimuth Positioner Brackets 10 2A.5 Protection of Roof during Construction 11

DIVISION 6 - WOOD ------------------------------------------------------------------------------------------------------------ 12

SECTION 6A - DECKING 12

6A.1 Scope of Work 12 6A.2 Materials 12

SECTION 6B - PLYWOOD 12

6B.1 Scope of Work 12 6B.2 Materials 12

DIVISION 7 – THERMAL & MOISTURE PROTECTION --------------------------------------------------------------- 13

SECTION 7A - EQUIPMENT PROTECTION 13

7A.1 Scope of Work 13 7A.2 Materials 13 7A.3 Installation 13

SECTION 7B – UNDERLAYMENT 13

7B.1 Scope of Work 13 7B.2 Materials 13 7B.3 Installation 13

SECTION 7C – STAINLESS STEEL MESH COUNTERPOISE --------------------------------------------------- 13 7C.1 Scope of Work 13 7C.2 Materials 13

SECTION 7D – SINGLE-PLY PVC ROOFING MEMBRANE ------------------------------------------------------- 14 7D.1 Scope of Work 15 7D.2 Materials 15 7D.3 Caulking for PVC Membrane 16 7D.4 Weather Limitations 16 7D.5 Quality Assurance 16 7D.6 Product Delivery and Storage 20 7D.7 Membrane Installation 21 7D.8 Weather Protection 23 7D.9 Field Quality Control 23

SECTION 7E – Monitor Cable Conduit 24

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7E.1 Scope of Work 24 7E.2 Materials 24 7E.3 Installation 24

DIVISION 10 – SPECIALTIES ------------------------------------------------------------------------------------------------ 24 SECTION 10A - ANTENNA SHELTER INSTALLATION ------------------------------------------------------------ 24

10A.1 Scope of Work 24 10A.2 Inspection 24 10A.3 Materials 24 10A.4 Shelter Door and Louvers 24 10A.5 Shelter Repair if damaged during removal and/or installation ---------------------------------------- 25 10A.6 Resin Application (If needed for Repair of damage area) -------------------------------------------- 25 10A.7 Paint Antenna Shelter 26 10A.8 TACAN Mounting Fixture Painting: N/A 26 10A.9 TACAN Antenna Unit Painting: N/A 26 10A.10 Inspection 26 10A.11 Antenna Shelter Base Gasket 26 10A.12 Antenna Shelter Installation 26

SECTION 10B – AZIMUTH (KEYSTONE) POSITIONER BRACKETS ------------------------------------------ 27 10B.1 Azimuth Installation 27

DIVISION 13 SPECIAL CONSTRUCTION -ASBESTOS AND LEAD ROOFING MATERIAL

ABATEMENT

13.1 SUMMARY OF THE WORK 27

13.2 VARIATIONS IN QUANTITY 28

13.3 STOP ASBESTOS REMOVAL 28

13.4 APPLICABLE CODES AND REGULATIONS 28

13.5 PROJECT COORDINATION 31

13.6 RESPIRATORY PROTECTION 32

13.7 WORKER PROTECTION 33

DIVISION 26 ELECTRICAL

26 05 26 Grounding

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DIVISION 1 - GENERAL REQUIREMENTS

SECTION 1A - SUMMARY OF THE WORK

1A.1 General This specification, along with project drawings, codes and standards specifies the technical requirements of the Federal Aviation Administration (FAA) to install an elastomeric (PVC membrane), a stainless-steel mesh roof system and a lightning and grounding protection system on a VORTAC facility. The VOR teepee will need to be replaced. The roof flashing has asbestos and there is lead in the facility. Furnish all labor, tools, and materials for this work. The VOR roof is flat and round with an approximate area of 2100 square feet.

1A.2 Scope of Work The work consists of, but is not limited to, the following:

1) Remove and then re-install the 16 ft. fiberglass antenna cone shelter. Repair 2” x 6” T&G roof decking with matching pressure treated lumber. Install moisture barrier.

2) The roof flashing has tested positive (1.2%) for Asbestos containing material.

And shall be properly disposed of as Asbestos Containing Material. The turnplate contains lead. All asbestos and lead shall be removed by a New York State licensed abatement contractor. All abatement must comply with ICR56. The abatement contractor shall submit an abatement plan which at a minimum state how the abatement will be performed. All workers on site shall have an asbestos and lead license. Air monitoring will be required. The plan shall be approved by the FAA prior to work being performed.

3) Survey/mark, remove and preserve the 16-monitor antenna keystone angle brackets. All sixteen (16) brackets will be reused.

4) Fabricate new monitor antenna support assemblies as detailed on drawings. Survey and install the 16 monitor antenna support assemblies and keystone brackets.

5) Install a stainless-steel mesh roof over the entire roof surface including inside the fiberglass antenna shelter.

6) Install flashing around perimeter of roof counterpoise.

7) Install ¾” tongue and groove plywood surface over mesh.

8) Install single-ply fully adhered, PVC roofing membrane with a minimum 15-year warranty.

9) Install SarnaTred-V (or equal) walkway tread area around the cone from the main access ladder supports at the roof edge, as indicated on the drawings.

10) Remove 120V ground fault interrupter A/C receptacle in the antenna shelter.

11) Supply and install one continuous tarpaulin in diameter to cover and protect the roof during inclement weather during construction. Diameter

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12) Provide and install the lighting and grounding protection system of the counterpoise

1A.3 Coordination All coordination between the contractor and the FAA shall be through the Contracting Officer and the designated Representative, COR.

1A.4 Sanitary Facilities Sanitary facilities are not available at the site. The contractor shall provide temporary toilet facilities as required for his workmen. Temporary toilet facilities shall be of the type approved by the local governing body. The location of the toilet facilities shall be as directed by the

COR.

1A.5 Materials The contractor shall furnish all materials, equipment, and labor to complete all contract requirements, the use of brand names or equal products in this specification does not constitute a requirement that they are the only materials which meet the specifications in this contract. They are used as an illustration of known acceptable sources or products.

If a brand name product is used in the drawings or Specifications, it should be regarded as a “known acceptable source". The use of the term “known acceptable source” and “brand name or equal” in referencing a specific product or manufacturer is not intended to indicate a preference for the products mentioned but indicates the quality and characteristics of products that will meet the Government requirements. Should the Contractor decide to use a product other than that identified as a “known acceptable source” or “brand name or equal”, the Contractor shall provide a submittal for this product. This does not relieve the Contractor from providing submittals for products or materials required in other sections of this Specification.

1A.6 Material Storage The contractor shall store all materials in a manner to protect them from all elements of the weather. No contractor furnished materials shall be stored inside the FAA equipment building or engine generator room.

1A.7 Ingress and Egress to Work Areas Ingress and egress to the work areas shall be as directed by the COR. Security precautions against unauthorized site and building entrance shall be maintained. The contractor shall keep all vehicles, working equipment and materials within the leased boundaries of the access road and site plot.

1A.8 Cleaning

1) Work Area: The contractor shall keep the work area clean and proper condition. All rubbish and waste resulting from the execution of the work shall be removed at the end of each day or as directed by the COR. All dumpsters shall be covered.

2) Waste Packing Material: Immediately after unpacking, all packing material, case lumber, excelsior, or other rubbish, flammable or otherwise, shall be removed from the building and the premises.

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3) Final Clean-Up: Upon completion of work, and before final inspection, the contractor shall remove his working tools, equipment, debris, rubbish, and unused materials from the building site.

4) Disposal: Disposal of rubbish, debris, and gravel will be off the site at the contractor's expense or as directed by the COR.

1A.9 Pre-Construction Meeting The contractor shall attend a Pre-Construction Meeting prior to starting work at a location agreed upon between the contractor and the Contracting Officer.

1A.10 Project Drawings The following generic construction drawings form a part of specification and are applicable to the extent specified herein. If any conflict exists between drawings and the specifications, the specifications shall govern.

Project Drawing Date Title SYR-19001788-G001 Cover Sheet, Roof System and Vicinity Map

SYR-19001788-G002 Drawing Index, Abbreviations, and Legend

SYR-19001788-G003 General Notes and GFM List

SYR-19001788-D001 Demolition Plan

SYR-19001788-A001 Roof Plan Layout/Counterpoise Replacement and Grounding

SYR-19001788-A002 Roof Edge Flashing Details and Grounding

SYR-19001788-A003 Antenna Enclosure Plan and Details

SYR-19001788-A004 Walkway Layout and Ladder Supports

SYR-19001788-S001 Monitor Antenna Support Assembly

SYR-19001788-S002 Alternate Monitor Antenna Support Assembly

SYR-19001788-E001 Grounding Details

SYR-19001788-E002 Grounding Details

SYR-19001788-E003 Grounding Details

Reference Drawings

SYR-19001788-C001

SYR-19001788-C002

SYR-19001788-C005

Property Layout Plot Layout Site Plan and Layout

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1A.11 Site Visit Bidders are encouraged to visit the site and carefully examine the areas in question as to conditions that may affect proper execution of the work. All dimensions and quantities shall be determined or verified by the contractor. No claims for extra costs will be allowed because of lack of full knowledge of the existing conditions. The VOR facility is located off airport in Syracuse, NY. To arrange for a site visit contact Bobby Flowers, SYR SSC Specialist (315) 317- 0197.

1A.12 Contractor’s Warranty

The standard contractor’s warranty is one year material and workmanship, except for extended warranties, i.e., roofs.

1A.13 Manufacturer's Warranty The elastomeric membrane roof system (PVC membrane) shall be guaranteed against defects by the manufacturer and be leaking free for a period of 15 years after completion. This warranty shall identify the FAA as the owner of the facility and shall protect the FAA from all costs of repairing leakage resulting from defects in the elastomeric system. The location of the facility and the effective starting date of the warranty shall be indicated. Final contract payment will not be released until receipt of the written warranty from the contractor.

1A.14 Contractor's Liability Damage to existing facilities and equipment caused by the contractor shall be reported to the COR without delay. The contractor will be responsible for repairing, or having repaired, all damage of the building or equipment at the contractor's expense. All repairs shall be accomplished to the satisfaction of the COR.

1A.15 Workmanship All work shall be accomplished by experienced workers in accordance with the highest standards of the various work trades involved.

1A.16 Work Permits The cost of all construction and working permits required by local and state agencies shall be included in the contractor’s cost proposal.

1A.17 Asbestos Free Certification The Contractor shall provide to the Contracting Officer-(CO) a signed statement stating that to the best of his/her knowledge, no asbestos-containing building materials were used during the re- roofing of this facility.

The FAA will sample the suspect material to verify that no asbestos-containing material was utilized. This testing shall be performed at the expense of the FAA prior to construction on the facility. If asbestos-containing material is subsequently found during the sampling of the building materials, the Contractor shall remove and replace the product or material at his/her expense.

The Contractor shall submit to the COR, Material Safety Data Sheets (MSDS), prior to

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During the project, both the COR and the Contractor shall routinely check products utilized on-site to ensure only products which have had MSDS submitted are utilized. Copies of all MSDS shall be turned over to the local FAA office for their records.

1A.18 Hazardous Material and Safety Existing terne-coated metal roof contains LEAD. The contractor shall provide workers protection per OSHA 29 CFR 1926.62.

The contractor shall be responsible for safety on the work site. It is the responsibility of the contractor to eliminate hazards which may result in tripping, electrical shock, fire, falling objects, environmental hazards, vehicular accidents etc. The contractor shall comply with all safety precautions required by OSHA. The contractor shall have two l5 lb. Class B and C fire extinguishers at the work area through the progress of welding, soldering, metal cutting, or any other process involving a spark or fire hazard.

DIVISION 2 - SITE WORK

SECTION 2A - EQUIPMENT REMOVAL

2A.1 Scope of Work The fiberglass antenna shelter and monitor antennas shall be removed from the building roof prior to installation of the new single-ply membrane roof. The TACAN antenna and VOR antenna shelter shall be removed by the contractor with FAA oversight. The contractor shall provide the crane, operator, and rigging to safely lift the Tacan antenna, Tacan mounting collar, and the antenna shelter (teepee). Remove all existing terne-coated metal pans, cleats, nails, rosin paper, and base felts from the existing wood deck and dispose of. Temporary covering over the roof shall be provided until new roof is installed, and antenna shelter has been reinstalled. The temporary roof covering shall be the tarpaulin specified in this specification which shall be supplied by the contractor.

2A.2 TACAN Antenna Removal

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1) Before the TACAN antenna is removed, all antenna cables will be disconnected by the FAA and pulled back into the building or protected. Likewise, the VOR antenna system will be removed by the FAA from the antenna pedestal mounting support and placed in storage.

2) The TACAN antenna is approximately 4 feet in diameter by 7 feet high and is mounted on top of a 4-foot diameter by 2 feet high steel top mounting fixture which sets on top of the fiberglass antenna shelter. The TACAN antenna weighs approximately 800 pounds.

3) The TACAN antenna shall be removed first. Attach the FAA provided sling to the TACAN antenna and crane. The antenna rests on a gasket and is bolted to the top mounting fixture with eight bolts through an internal base flange. Carefully remove hold-down bolts after sling is in position and lower the TACAN antenna to grade for safe storage on site. The entire removal operation is to be accomplished under the direction of the FAA electronics specialists who will be on site for these operations. Minimum two days advance notice for removal shall be given the COR. The orientation of the TACAN collar should be noted.

4) The TACAN antenna shall be stored on site there directed by the COR. The antenna shall be temporarily bolted to a wood frame and crate (dunnage) provided by the contractor. The assembly shall remain attached to the crane until bolting to the wood frame is accomplished.

5) Contractor shall prep collar including cut caulking around collar and properly sling before unbolting

2A.3 Fiberglass Antenna Shelter Removal

1) The orientation of antenna shelter door shall be noted prior to removal to assure reinstallation in the same relative position.

2) In addition to the lag bolts holding the antenna shelter to the roof, waterproofing material at the base was also incorporated in the original construction that will contribute to difficulty in removing the shelter. Such materials will include a circular gasket under the antenna shelter, flashing materials adhering to the roof and antenna shelter, and various caulking and sealant beads at this juncture. Carefully cut such materials free from the antenna shelter using knives and flush-cut surface saws, in such manner that the shelter is in no way damaged. Carefully remove the heavy residue from the shelter ensuring not to damage the fiberglass.

3) Hoist cables shall be secured to the antenna shelter system before hold-down bolts are removed to ensure that shelter will not blow over in the wind. Shelter shall be carefully hoisted in an approved manner from the building roof to temporary storage on grade. Place antenna shelter on wood blocking and boards of sufficient area such that the weight of the antenna shelter is distributed over at least 50% of the area of the base flange to preclude damage to the relatively brittle shelter.

4) Immediately after placement of the antenna shelter on grade, it shall be anchored with at least four guy wires or ropes and posts driven into the ground to preclude this shelter from being blown over by the wind. This precaution is emphasized due to its occurrence in the past at substantial cost for replacement.

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5) The existing teepee will either be stored on site or placed on an FAA trailer for transport, depending on when the new teepee is delivered. The new teepee will typically arrive and be exchanged with the old/existing teepee on the day the existing teepee is removed from the roof, or when the new roof is ready for teepee installation. The new teepee, if not immediately installed on the roof, shall be properly secured as described above.

2A.4 Azimuth Positioner Brackets

1) Prior to removal of the 16-monitor antenna keystone angle brackets, the monitor antennas and connecting cables will be disconnected and removed by the FAA. Do not remove the North bracket (identified by the COR) until a registered land surveyor has established facility North. The antenna brackets consist of 5" x 5" x 3/8" x 6" long aluminum angles fastened to the roof deck with four mechanical fasteners.

Keystone (trapezoidal face) plates are attached to the azimuth positioner brackets which support the antennas by a wedging action. All monitor antenna brackets will be reused.

2) Each monitor antenna keystone angle bracket shall be covered with padding after it is installed to protect the tarpaulin roof covering from puncturing on the exposed sharp edges of the brackets during construction.

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2A.5 Protection of Roof during Construction Temporary covering over the roof shall be provided until new roof is installed, and antenna shelter has been reinstalled. The temporary roof covering shall be the tarpaulin specified in this document which shall be supplied by the contractor.

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DIVISION 6 – WOOD

SECTION 6A – EXISTING ROOF DECKING

6A.1 Scope of Work After the old roofing material has been removed, the contractor shall replace all deteriorated decking, wood framing and fascia material as directed by the COR. The contractor shall submit a unit price/square ft to perform this work. Price shall include all required framing and furring material required.

6A.2 Materials

1) Lumber: Lumber shall be pressure treated with preservative Chromate Copper Arsenate (CCA) and dried after treatment. Retention of preservative shall not be less than 0.40 lbs./cubic foot.

2) Decking: Decking shall be nominal 2” x6” tongue and groove to match existing wood decking.

3) Nails: Nails for decking shall be 8D common nails.

4) Fasteners: The wood nailers shall be attached to the existing decking with 302, 304, or 410 stainless steel fasteners or fasteners specially coated to be used in CCA treated lumber as indicated on the drawings. Furring strips shall be affixed to existing nailers, fascia, and one to another utilizing 1/4"Ø x 2 1/2" Long “Zinc-Plated Steel” Lag Screws, or equal.

SECTION 6B - PLYWOOD

6B.1 Scope of Work After the stainless-steel mesh has been installed, the contractor shall install pressure treated 4’ x8’ x3/4” plywood on top of the stainless-steel mesh.

6B.2 Materials

1) Lumber: Lumber shall be pressure treated with preservative Chromate Copper Arsenate (CCA) and dried after treatment. Retention of preservative shall not be less than 0.40 lbs./cubic foot.

2) Plywood: Plywood shall be pressure treated 4’ x8’ x 3/4” tongue and groove. Fasten plywood to roof with 8D common nails, 6” O.C. along the edges, inset 1” from edge, and 12” O.C. over rest of plywood surface (see detail 4 on Dr. No. SOSD-VORPVC- A001.

3) Nails: Nails for decking shall be 8D common nails.

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DIVISION 7 – THERMAL & MOISTURE PROTECTION

SECTION 7A - EQUIPMENT PROTECTION

7A.1 Scope of Work Provide a protective moisture barrier plastic cover over all electronic equipment, control panels, and power panels.

7A.2 Materials

1) Polyethylene film sheeting, six mils thick, transparent, and in width suitable to adequately cover the equipment.

2) Duct tape used to attach the polyethylene film sheeting shall be waterproof sealing type.

7A.3 Installation Carefully cover the equipment so that no water can enter the cabinets and damage the equipment. Equipment in service which generates heat and requires ventilation shall have a wood frame constructed above the equipment and covered with polyethylene membrane. All temporary polyethylene covering shall be approved by the COR.

SECTION 7B – UNDERLAYMENT

7B.1 Scope of Work Install underlayment covering on top of the main deck.

7B.2 Materials

1) Fasteners: As recommended by underlayment manufacturer.

2) Underlayment: butyl underlayment, grace ultra or equal and must be compatible with the stainless-steel mesh counterpoise.

7B.3 Installation Prior to installation, remove all oil, dirt, and other debris from the roof deck. Ensure loose or protruding nails are removed or hammered down. All surfaces shall be dry and free from frost.

Lay down one layer of underlayment and secure as required.

SECTION 7C – STAINLESS STEEL MESH COUNTERPOISE

7C.1 Scope of Work The work covered by this section is for a Stainless-Steel mesh counterpoise.

7C.2 Materials:

A. Fasteners:

1. Stainless steel Staples- minimum 16ga -2” leg 304 type

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2. Welding material - Shall be either solid core stainless steel for use with gas for MIG/ flux core Stainless steel for MIG or stainless-steel stick for stick welding capable of type 304 stainless steel. It is suggested that the contractor use Flux core MIG techniques for this job due to the environmental factors of wind and small size of the mesh material. However, the contractor may choose whatever method works to obtain a clean consistent weld. Most VOR buildings have 208 three phase power but for this type of weld a Flux core 120v welder is recommended.

B. Stainless Steel Sheet metal-304 type 16 ga for grounding corners and center antenna array

C. 3/4” Diamond X 9 Gauge Stainless Steel flattened expanded metal Mesh (approx.

2100 sq. ft.) Mesh shall be type 304SS.

D. Mesh shall be laid on the roof in the same direction of the decking so that it will be stapled into solid wood and gaps can be avoided. The seams of runs across the roof may be parallel for ease of welding, however, the horizontal runs where material butts together must be staggered.

E. Mesh must be welded with a minimum of a 1/2” tack every 6 inches on parallel and butt joints. The mesh must be rolled over the edge of the roof by 1“. The mesh must be tacked down with a sufficient number of staples to hold it completely flat on the roof surface and flat on the roof edges.

F. Proper protection must be provided under the weld being accomplished. The deck of a VOR building is usually very dry material and easily prone to a fire hazard. The Ice and water shield is easily damaged by excessive heat; therefore, it is suggested that the material be welded as it is laid down in sections. It is recommended that a ¼” x 4” x 8” copper plate attached to a piece of ¼” flat steel be dragged under the mesh at each weld to dissipate the heat and sparks created by the welding process.

G. Ground plates at 4 corners of building shall be welded with at least 6 tacks of ½ inch long. The plates shall be made of 304 grade stainless steel and mounted under the mesh. The plates shall be fabricated as detailed on drawing E001.

H. Stainless steel bonding segments shall be mounted under the mesh and welded for a minimum of ½ inch every 3 inches. The bonding segments details are located on drawing E001. The segments shall be mechanically connected to the antenna pedestal mounting plate by drilling and use of self -tapping screws.

SECTION 7D - SINGLE-PLY PVC ROOFING MEMBRANE

7D.1 Scope of Work The work covered by Section 7C is for a fully adhered, 0.080 inch thick, single-ply Polyvinyl Chloride (PVC) membrane with hot air welded seams.

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7D.2 Materials:

1) Single-Ply Membrane:

Membrane shall be a fiberglass-reinforced flexible PVC sheeting, 0.080 inches thick, such as G 410 as manufactured by Sarnafil, Inc., (Tel. 1-800-451-2504), or approved equal. PVC membrane used for flashing and roofing shall be fully adhered with hot air welded joints. Color shall be white. The proposal of another manufacturer's product requires the following: Membrane manufacturer's Catalog and Specification Data including descriptions and detailed application instructions, standard installation detail drawings, product characteristics, physical properties, a copy of the minimum 15-year warranty. Acceptable Alternate Manufacturers

For Flashing: G410-12, 48 mil and 60 mil (1.2 mm), thermoplastic membrane with fiberglass reinforcement. No flashing shall be attached to the VOR antenna shelter (teepee).

For The Roof: G410-20, 80 mil (2.0 mm), thermoplastic membrane with fiberglass reinforcement.

Certified Polymer Thickness

Membrane manufacturer is to certify that the polymer thickness is of the polymer thickness specified. Certification is to be signed by the membrane manufacturer’s quality control manager. ASTM +/- tolerance for membrane thickness is not accepted.

Color of Membrane

Energy Smart (white), initial reflectivity of 0.83, initial emissivity 0.90, solar reflective index (SRI) of >104.

Typical Physical Properties (1)

Parameters ASTM

Test Method Minimum ASTM

Requirement Sarnafil Typical

Physical Properties

Reinforcing Material - Fiberglass Overall Thickness, min., inches (mm) D638 0.0805 (1.14) [0.08 inches)] Tensile Strength, min., psi (MPa) D638 1500 (10.4) 1600 (11.1) Elongation at Break, min. (machine x tranverse) D638 250% / 230% 270% / 250% Seam strength(2), min. (% of tensile strength) D638 75 80 Retention of Properties After Heat Aging D3045 - -

Tensile Strength, min., (% of original) D638 90 95 Elongation, min., (% of original) D638 90 90

Tearing Resistance, min., lbf (N) D1004 10 (45.0) 14 (63.0) Low Temperature Bend, -40º F (-40º C) D2136 Pass Pass Accelerated Weathering Test (Xenon Arc) D2565 5,000 Hours Pass

Cracking (7x magnification) - None None Discoloration (by observation) - Negligible Negligible Crazing (7 x magnification) - None None

Linear Dimensional Change D1204 0.10 % 0.02% Weight Change After Immersion in Water D570 ± 3.0% 2.5% Static Puncture Resistance, 33 lbf (15 kg) D5602 Pass Pass Dynamic Puncture Resistance, 7.3 ft-lbf (10 J) D5635 Pass Pass

*Failure occurs through membrane rupture not seam failure.

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2) Flashing Material:

a) Membrane coated flashing material shall be "PVC coated metal ", G 410- L, 25-gauge galvanized steel, coated with a 0.02-inch-thick coating of PVC film or approved equal. This material shall be used for edge flashing around the perimeter of the counterpoise roof and bottom retaining strip.

3) Protection Mat:

a. SarnaTred-V polyester-reinforced PVC protection mat, or approved equal, shall be installed where shown on the project drawings to protect the roofing membrane in high traffic areas.

4) Adhesives:

a) 2170 solvent-based, elastomeric adhesive or approved equal shall be used to attach the membrane, polyester felt and tread protection mat to the substrates specified.

b) 2121 water-based dispersion adhesive or approved equal shall be used to apply a silica sand non-slip surface to the walkway membrane. This product must be protected from freezing.

c) 11FC and Primer 449: The 11FC is one-component polyurethane construction adhesive. The primer is clear, solvent base primer.

7D.3 Caulking for PVC Membrane

Caulking to be used on the seam between the fiberglass antenna shelter and the single-ply membrane (inside and outside), on the antenna shelter lag bolt pilot holes, and installing the ladder deck supports to the roof surface, shall be premium grade high-performance moisture cured, non-sag, and polyurethane-based elastomeric sealant 3M 5200, or approved equal.

All caulking shall be chemically compatible with the PVC membrane.

7D.4 Weather Limitations Roofing or insulation materials shall not be applied until the ambient temperature is above 50 deg F with no signs or forecast for rain. Roofing materials shall not be applied when there is excessive moisture in the air causing wet or damp surfaces.

7D.5 Quality Assurance

1) Approved roofing system shall have a Class I-90 wind uplift rating.

2) Applicators shall be trained and qualified for installation of the approved roofing system.

3) The roofing contractor shall be a firm with a minimum of two years’ experience with the approved roofing system.

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4) The Contractor shall be required to have the manufacturer’s technical representative, at a minimum, visit the site one day at the beginning of the roof installation and one day at the end of the project.

5) The technical representative shall advice the contractor and COR concerning the effectiveness and acceptability of the roof system that the contractor has proposed and the implemented method of welds.

6) The technical representative and contractor shall test all the welds in the presence of the COR. All welds shall be tested for continuity by running a rounded edge screwdriver along the membrane joints after cooling. Any discontinuities shall be re-welded. Positive evidence of good welding is characterized by an uninterrupted extrusion of melted black material from the joint.

7) The Resident Engineer (COR), shall require the contractor to sample the welded seams by cutting two-inch wide cross-section samples of the welded seams.

Correct welds will display failure from shearing of the membrane prior to separation of the weld. The Contractor, at no additional charge to the FAA, shall patch each test cut.

Expect to test each seam done at least twice.

8) The technical representative shall confirm that the finished product will receive the specified manufacturer’s warranty; and send a copy of their site visit report to the

COR.

9) The technical representative shall inspect the roof just before installation of the walkway to assure that the roof is watertight. All welds shall be tested and sampled for continuity.

10) Seam Probing - The Applicator is responsible for probing of all seams.

11) After the membrane has cooled from hot-air welding, check the seams for continuity using a rounded flat head screwdriver or other acceptable tool (seam probe). Firmly press the edge of the screwdriver firmly into the seam area while moving it along the seam. Mark areas where the probe can penetrate the seam for repair.

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Quality Assurance Procedures

Seam Samples — A minimum of 3 seam test samples, each approximately 1 inch wide, must be taken daily by the Roofing contractor. Samples should be taken at the start of each day’s welding, when they stop for brake, and when starting back up after lunchbreaks.

1. Allow the membrane to cool off after hot-air welding. The sample is taken by cutting out a cross- section of the seam approximately one-inch wide by eight inches long with the seam in the center.

2. Using Vice-Grips or pliers, pull the seam apart. The seam is considered acceptable when the top membrane separates within itself.

3. Repair the sample area by hot air welding a patch that is at least 3 inches larger than the opening in all directions.

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Samples must be dated and welded over the patch area for the technical representative.

Example of a hand weld that has passed the peel test.

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Example of Machine failed peel test.

View of a good peel test; fiberglass reinforced and polyester reinforced membranes.

7D.6 Product Delivery and Storage All products delivered to the site shall be in original unopened containers. Store membrane rolls lying down, fully protected from moisture. All stored materials shall be protected from damage during construction by the contractor.

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7D.7 Membrane Installation

1) Inspection: The roofing contractor shall examine the surface scheduled to receive the membrane for defects that will adversely affect the execution and quality of work.

2) Preparation: The surface of the plywood and other surfaces to receive membrane shall be dry and free from dust or loose particles which would interfere in obtaining proper adequate bond.

View of the roof drip edge area

3). Application:

a) Lap Seams Shingle Fashion: The VOR counterpoise roof slopes from the fiberglass antenna shelter to the outer edge in all directions. The contractor shall begin at the south edge of the counterpoise roof and lay the PVC membrane east-west towards the center of the roof and stop when reaching the center. Then the contractor shall begin at the north edge of the counterpoise roof and lay the PVC membrane east-west working towards the center of the roof and finish up with a closure strip across the

22 | P a g e center. This will allow the roof to drain over the laps in a shingle fashion. All references to north-south and east-west are based on the azimuth positioner brackets, which are set on magnetic bearings. See the project drawings for details.

b) Fully Adhered Membrane: Carefully follow the PVC membrane manufacturer's instructions for using adhesive to install a fully adhered membrane system. The membrane shall be smooth and free from wrinkles, air bubbles, puckers, and similar irregularities which leave an unsightly appearance. Membrane laid that is not in accordance with this contract, shall be replaced or repaired, at the Contractor’s cost, in a manner that is acceptable to the manufacturer, in order to pass the required inspection for the required manufacturer’s extended warranty. The membrane shall be installed in strips as long as possible in order to minimize the number of end laps and short pieces.

c) Joining Overlapped Roof Membrane: All joints shall be made by hot air welding with electric hot-air welding equipment meeting the membrane manufacturer’s approval. Lap areas shall be a minimum of 6 inches wide. No adhesive shall be present within the lap area. Machine welding shall be used on all seams where possible. Hand welding shall only be used where seams are not accessible for machine welding.

d) Machine Welding: Machine welding shall be achieved using an automatic welding machine approved by the membrane manufacturer. When using this equipment, the manufacturer's instructions shall be followed and local code for the electric supply, grounding, and overcurrent protection observed. The automatic welding machine requires 218 to 230 volts at 30 amps. (The use of a contractor-furnished portable generator is recommended.)

e) Hand Welding: The equipment shall be allowed to warm up for at least one minute prior to the start of welding. The lap shall be welded every three feet to hold the material in place. The back edge of the lap shall be welded with a thin, continuous weld to prevent loss of hot air during the final welding. The hot-air nozzle shall be inserted into the lap, keeping the welding equipment at a 45-degree angle to the side lap. Once the proper welding temperature has been reached and the material starts to flow the hand roller shall be applied at a right angle to the welding bun and pressed lightly. For straight laps, the 1 1/2-inch-wide nozzle shall be used. For corners and compound connections, the 3/4-inch-wide nozzle shall be used.

f) Roof Edge Flashing: The roof edge fascia flashing and bottom retaining strip shall be fabricated from PVC metal clad metal or approved equal. Flashing details are shown on the project drawings. The roof edge fascia flashing shall be attached to the solid wood nailers with two rows of #12 x 3 1/4-inch long Buildex Roofgrip Fasteners, with #3 Phillips Head, set 3 inches on center in a staggered pattern as shown on the drawing details.

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7D.8 Weather Protection

When inclement weather forces a work stoppage or when the contractor leaves the work site at night, over weekends or any other time, the roof shall be covered with the specified tarpaulin securely tied down and weighted with sandbags or similar means to prevent the wind from blowing the tarpaulin off. It shall be the responsibility of the contractor to ensure the tarpaulin is leak free. Roofing materials damaged from wind or rain during construction shall be replaced at the contractor's expense.

7D.9 Field Quality Control Test all welds for continuity by running a screwdriver along the membrane joints after cooling. Re-weld any discontinuities by and uninterrupted extrusion of melted black material from the joint.

Cut a half inch wide strip perpendicular to the seam at each seam of the roof and test the condition of the seam and patch the test area. Refer to section 7D.5 Quality Assurance.

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SECTION 7E – MONITOR CABLE CONDUIT

7E.1 Scope of Work The work covered by this section is for replacement of the existing monitor cable conduit. The COR/RE and the contractor shall determine in the field whether the existing condition of the conduit warrants the replacement of this conduit. The contractor shall submit a bid alternate line item to perform this work.

7E.2 Materials:

1) -1 ½ in. Sch 40 PVC (4 lengths coming out of exterior walls to perimeter of roof).

-1 in. Sch 40 PVC (8 lengths from PVC Tee to each monitor antenna).

-required PVC Tee bodies.

-required brackets/supports

7E.3 Installation:

If it is determined that these conduits need to be replaced, the contractor shall install the new conduit to match layout of the existing conduit.

DIVISION 10 – SPECIALTIES

SECTION 10A - ANTENNA SHELTER INSTALLATION

10A.1 Scope of Work This section covers the requirements for installing the VOR fiberglass antenna shelter, on the new roof. The contractor is cautioned that the VOR fiberglass antenna shelter can be damaged with rough handling. Care must be exercised when working with the shelter to maintain its structural integrity. In addition, the following specifications cover the requirements to furnish all material, equipment, labor, and supervision to accomplish the work described in this specification.

10A.2 Inspection All phases of this work shall be approved by the COR.

10A.3 Materials

1) Caulking: Caulking shall be premium grade high-performance moisture cured, non-sag, and polyurethane-base elastomeric sealant 3M 5200 or approved equal.

2) Gaskets: All the shelter gaskets are GFM.

3) Lag Bolts: To secure antenna shelter. Contractor shall furnish new 3/8" x 3" long hex head stainless steel lag bolts and washers.

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10A.5 Shelter Repair if damaged during removal and/or installation

All holes, cracks, damaged areas or areas where the protective resin coatings have worn away and have left the fiberglass surface exposed and weathered shall be repaired, as follows.

1) Cut away all ragged edges and corners from the damaged area of the panel to form an oval or round hole by using a router, rasp or other acceptable tool.

2) Feather the edge of the hole on the interior and exterior surface of the panel to a smooth, sloping contour approximately 3 inches beyond the edge of the hole.

3) Clean all abraded areas with solvent cleaner.

4) Cut fiberglass cloth patches approximately 2 or 3 inches larger than the hole formed in Step 1.

5) Apply premixed epoxy resin with a paint brush or spatula to the abraded surface and the feathered edge of the hole.

6) Position fiberglass cloth patch on exterior surface of panel, and brush resin on outside of patch and around edges to produce a filled surface free of air bubbles.

7) On the interior side of the panel, cut a fiberglass cloth patch to fit the dimensions of the hole. Cut sufficient number of additional patches, in increasing sizes (in 1/2-inch increments) to obtain a patch thickness (when impregnated with resin) of slightly greater thickness than the original pane. Finally, cut and apply one patch 2 inches larger in diameter than the preceding patch.

8) After the resin has completely dried, sand the repaired areas smooth with a fine grit sandpaper.

10A.6 Resin Application (If needed for Repair of damage from removal and/or installation of fiberglass shelter) Combine and mix resin in accordance with the manufacturer's instructions. Use extreme caution in handling the catalyst and accelerator as they are toxic and highly reactive. Catalyst and accelerator ratios depend upon many factors, including application method (two-part pressure spray, roller, or brush), ambient temperature, and humidity. The resin may be applied by means of a two-part pressure pot, rollers, or brushes. Apply one coat of uniform thickness to entire surface to be refurbished. Where the fiberglass is exposed and loose glass fibers stick out n the surface, apply the resin in a manner which will cause the fibers to lie flat on the surfaces and become embedded in the resin coating. Required final coating shall be five to six mils in thickness on surfaces which are not deteriorated to the point where the fiberglass is exposed. Do not apply resin to surfaces which are evidently damp or have had insufficient drying time at lower humidity levels to assure evaporation of moisture from cracks and porous areas. Allow at least 20 hours of curing time for resin coating on any area of the surface before sanding and application of paint.

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10A.7 Paint Antenna Shelter (If needed for Repair of damage from removal and/or installation of fiberglass shelter) If applicable, apply two coats of white, QC-Resin. The first coat acts as both a primer and base coat and requires the addition of a small amount of Methyl Ethyl Ketone Peroxide (MEK- P) activator. Apply paint with a brush or roller. The first coat shall be worked in and spread to achieve a 5-mil dry film thickness (DFT). The second coat, which contains most of the white pigment shall be applied to achieve 7 mil DFT. Contact PPC Coatings to obtain these two separate coats that will be prepared specifically for this FAA application. Follow the manufacturer's instructions for mixing and pot life.

10A.8 TACAN Mounting Fixture Painting: N/A

10A.9 TACAN Antenna Unit Painting: N/A

10A.11 Antenna Shelter Base Gasket

Just prior to setting the teepee, the contractor shall prepare the bottom surface of the teepee for installation of the (GFM) teepee gasket by thoroughly cleaning and removing any old gasket material. The contractor shall then apply the gasket material to the underside of the teepee.

The gasket material typically comes with pressure sensitive adhesive, but may require the application of contact adhesive to firmly hold in place. The contractor shall supply the contact adhesive to be used as/if required.

10A.12 Antenna Shelter Installation

1) The antenna shelter shall be reinstalled atop the membrane in precisely the same location and orientation as existing before removal unless otherwise specified by the COR. The FAA will approve the final location and radial orientation of the teepee prior to drilling and fastening to the roof.

Prior to installing the antenna shelter with base gasket adhered, the contractor shall refer marks on the roof in order to center the antenna shelter. The contractor shall set the antenna shelter on the roof using the established reference marks to center and orient the shelter in the same azimuth as it was before it was removed from the roof, or as directed by the COR. After the shelter location has been approved by the COR, the contractor shall drill a 1/4" pilot hole in the center of each teepee base bolt hole, 1 1/2" deep, and fill with caulking. The contractor shall then secure the teepee with new 3/8” x 3” SS Hex Head Lag Bolts, SS washers, and the (GFM) fastening strips. Torque bolts equally to only such tightness to provide a watertight seal and not to an extent where fiberglass will shatter, or the gasket deforms excessively.

2) Apply caulking around the outer and inner edges of the teepee-roof seam to make a smooth bead.

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SECTION 10B – AZIMUTH (KEYSTONE) POSITIONER BRACKETS

10B.1 Azimuth Installation A registered licensed surveyor shall set a transit over the building center point and project a line through the center of the north azimuth positioner bracket to a mark on a wood hub driven flush with the ground approximately 200 feet north of the VOR building. Guard the hub with a 1" x 2" x 5'-0" (+/-) wood stake with a red flag tied to the top of the stake. This work shall be performed with care and the COR shall check and approve the reference point before the azimuth positioner brackets are to be removed. When the new contractor furnished monitor antennas support assemblies and keystone angle brackets are ready to be installed, the transit is set up, as previously referenced, to the wood hub, and scribe reference lines 22.5 degrees apart (relative to facility North) are placed near the edge of the roof at each of the 16 bracket locations using the transit to certify the proper reference of true north and angles.

After turning the transit scope 360 degrees, the cross hair must align precisely with the wood hub starting mark. The azimuth positioner brackets must be evenly spaced at 22.5 degrees apart on centers. The monitor antenna support assembly shall be installed per Dr. No.

SOSD-VORPVC-S001. If the existing soffit overhang is 5 inches or less, the alternative monitor antenna support assembly (Dr. No. SOSD- VORPVC-S002) can be used.

DIVISION 13 SPECIAL CONSTRUCTION

ASBESTOS AND LEAD ROOFING MATERIAL ABATEMENT

PART 1 - GENERAL

13.1 SUMMARY OF THE WORK

Remove Asbestos Containing Materials (ACM) as shown on the drawings.

13.1.1 TASKS

The work tasks are summarized as follows:

A. Pre-abatement activities including pre-abatement meeting(s), inspection(s), notifications, permits, submittal approvals, work-site preparations, emergency procedures arrangements, and standard operating procedures for Class II asbestos abatement work and Lead removal work.

B. Abatement activities including removal, clean-up and disposal of ACM and Lead waste, recordkeeping, security, monitoring, and inspections.

C. Cleaning and decontamination activities including final visual inspection, any air monitoring required and certification of decontamination.

D. Waste removal activities includes pre-coordination with waste facilities, segregating of ACM and Lead wastes, TCLP of Lead containing materials to characterize the waste, proper containerizing of waste and waste tracking documentation. The contractor may assume Lead containing material to be

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13.1.2 ABATEMENT CONTRACTOR USE OF PREMISES

A. The Contractor shall coordinate with the COR on the usage of power at the facility. The contractor shall provide all water, sanitary facilities, and any other utilities required. The contractor shall submit for approval the location of the staging area, decontamination area, and regulated area.

13.2 VARIATIONS IN QUANTITY

The quantities and locations of ACM as indicated on the drawings and the extent of work included in this section are estimates which are limited by the physical constraints imposed by accessibility to ACM. Accordingly, minor variations (+/- 10%) in quantities of ACM within the regulated area are considered as having no impact on contract price and time requirements of this contract. Where additional work is required beyond the above variation, the contractor must provide unit prices for newly discovered ACM and those prices must be used for additional work required under the contractor.

13.3 STOP ASBESTOS REMOVAL

If the CO or the FAA COR/RE presents a verbal Stop Asbestos Removal Order, the Contractor/Personnel must immediately stop all asbestos work and maintain adequately wet any exposed ACM. If a verbal Stop Asbestos Removal Order is issued, the CO will follow-up with a written order to the Contractor as soon as it is practicable. The Contractor must not resume any asbestos activities until authorized in writing by the CO. A Stop Asbestos Removal Order may be issued at any time the CO (via the FAA COR/RE) determines abatement conditions/activities are not within FAA specification, regulatory requirements or an imminent hazard exists to human health or the environment. Work stoppage will continue until conditions have been corrected to the satisfaction of the FAA.

Standby time and costs for corrective actions will be borne by the Contractor, including any Third-Party Air Monitor (TPAM) time. The occurrence of any of the following events must be reported immediately by the Contractor’s Competent Person to the CO and/or FAA COR/RE using the most expeditious means (e.g., verbal or…