HLG RTR Tilt Down Poles SOW.doc

Tilt Down Pole Installation

HLG RTR

Wheeling, WV

HLG RTR

TILT DOWN POLE FOUNDATION INSTALLATION

STATEMENT OF WORK

6/25/2020 Provide all labor, tools, equipment, materials, and supervision required to excavate for and install concrete foundations for two Ewing 15 foot tilt down poles and installing new electrical enclosures and underground conduit to the new poles. Work includes excavation, concrete installation, electrical enclosure installation, conduit installation, provisions for grounding, backfill, compaction, installation of new pole with appurtenances, and the placement of aggregate surfacing at the HLG RTR facility. Work will also include transporting the tilt down poles and appurtenances from the Pittsburgh International Airport, located near Pittsburgh, Pennsylvania, to the HLG RTR site.

The HLG RTR site is situated outside of Wheeling, West Virginia near the Wheeling Ohio County Airport.

· HLG RTR

Wheeling, WV 40º 10’ 40.32”N

80º 38’ 19.95”W

PART I - SECTION B

STATEMENT OF WORK

The work items listed below serve as a Statement of Work (SOW) to be performed under this contract for the installation of concrete foundations, tower erection and extension of the power and control conduits at the HLG RTR facility situated outside of Wheeling, West Virginia.

The work to be performed under this contract shall include but is not limited to the following:

The contractor shall:

1. Install two reinforced concrete foundations including excavation, backfill, compaction of soil, and anchor bolt placement. The foundations must be 3’–0” diameter or square 4’-0” in depth. A stand shall also be installed with a concrete foundation for each pole 1’-0” diameter 3’-0” in depth.

2. Assemble and install the tilt down poles. Gap between top of foundation and underside of base plate to be filled with non-shrink grout.

3. Furnish and install a new 12” x 10” x 6” NEMA 4X stainless steel electrical enclosure on the existing building with a stub to the interior for the electrical feed and a new 30” x 24” x 10” NEMA 4X stainless steel electrical enclosure at each new pole for the signal feed. Support and mount the electrical enclosures and provide conduit to permit final connection of the cables by the FAA. Install an 8 hole ground bar in each pole enclosure attached to the counterpoise with a 4/0 copper cable by an exothermic weld. The cable must be in a 1” PVC conduit.

4. Excavate for and install rigid metallic and non-metallic conduit between the existing electrical enclosure on the building and the tower foundations. One 4” Schedule 80 PVC conduit and one 1” rigid galvanized steel (RGS) conduit shall be installed for each tower at a depth of 36 inches. Expansion fittings shall be installed for each conduit on both the building side and the tower side. Pull tape must be provided in the conduits. Furnish and install a 1/0 copper guard wire one foot above the PVC conduit and tie into the existing counterpoise at the building and the new counterpoise at the tower foundations using exothermic welds. Detectable warning tape shall also be installed above the conduits.

5. Install grounding as required and tie into existing grounding systems. Furnish and install copper wire, air terminals, supports, clamps and down conductor copper wire for lightning protection.

6. Furnish and install Dialight 860 series LED single obstruction light on each pole. Provide wiring as required.

7. Install new stone aggregate in the area around the RTR poles.

8. The following Government-Furnished Material (GFM) will be provided for this project, which is located at the Pittsburgh International Airport near Pittsburgh, Pennsylvania, and shall be transported to the HLG RTR site:

· Ewing 15’ fold down pole with mounting frame assembly (two)

· Fold down pole appurtenances

· Anchor bolts

PART 1 - SECTION C

DESCRIPTION/SPECIFICATION

SECTION INDEX

TABLE OF CONTENTS

DIVISION 1 - GENERAL REQUIREMENTS

Section

Title 1-1 Summary of Work

1-2 Construction Limits and Use of Facilities

1-3 Temporary Facilities

1-4 Contract Closeout

1-5 Project Record Documents

1-6 Completion Certificate

DIVISION 2 - SITE WORK

2-1 General

2-2 Applicable Documents

2-3 Grading

2-4 Trenching and Underground Conduit Installation

2-5 Foundation Excavation and Backfilling

2-6 Stone Surfacing

2-7 Demolition

DIVISION 3 – CONCRETE

3-1 Formwork

3-2 Reinforcement

3-3 Cast in Place Concrete

3-4 Grouting

3-5 Quality Assurance

DIVISION 13 – SPECIAL CONSTRUCTION

13.1 Tilt-Down Pole

DIVISION 16 - ELECTRICAL

16-1 Electrical Material and Installation

16-2 Applicable Documents

16-3 Grounding

16-4 Wire Methods

ATTACHMENTS

Sketches

Site Layout

Foundation

Details

Grounding

DIVISION 1 - GENERAL REQUIREMENTS

1-1 SUMMARY OF WORK

1-1.1 General

These specifications, together with the referenced specifications, standards and drawings specified in the Contract Documents, cover the requirements of the Federal Aviation Administration, hereinafter referred to as the Government or FAA, for all work associated with the installation of concrete foundations, tower erection and electrical work at the HLG RTR facility. The equipment is situated outside Wheeling, West Virginia.

1-1.2 Intent of Specifications This specification identifies all labor, materials and equipment necessary to perform the required work. All material not specifically indicated as furnished by the Government in the List of Government Furnished Materials (GFM) shall be furnished by the Contractor.

1-1.3 Construction Per Drawings

The construction of this facility shall be in accordance with the General lines and grade shown on the contract drawings. The Contractor shall verify all distance by measuring in the field. The Contractor shall install the foundations following the standard details and these specifications.

1-1.4 Contract Duration

The contractor shall have 45 total calendar days from the notice to proceed (NTP) to complete the project.

1-1.5 Site Visit It is suggested that the Contractor make a site visit prior to submitting a bid. The facility point of contact for the HLG RTR is Mr. Craig Gray, acting SSC Manager, at 412-461-8825 extension 245 or at (412)-269-9241. Prior to visiting the site, 48-hour notification is required.

1-2

CONSTRUCTION LIMITS AND USE OF FACILITIES

1-2.1 Construction Limits

The Contractor shall confine operations, activities, storage of materials and employee parking within the areas designated by the Resident Engineer (RE) or Contracting Officer’s Representative (COR). Any additional space the Contractor deems necessary shall be obtained off the site, at no additional cost to the Government.

1-2.2 Damage to Site

Damage to existing pavement, landscaping, structures or underground facilities caused by the contractor's activities shall be repaired. The Contractor shall pay for all costs of such repairs. After the Notice to Proceed (NTP) and prior to commencement of construction, the Contractor and Resident Engineer (RE) or Contracting Officer’s Representative (COR) shall conduct joint inspections of the existing area. Existing damage or defects shall be noted and will be used as the basis for determination of damages caused by the Contractor's operations.

The contractor shall contact the local One Call system a minimum of 72 hours prior to starting work.

1-2.3 Contractors' Use of Premises

The Contractor shall have use of the premises within the construction area limits for the execution of his work and shall assume full responsibility for the protection and safekeeping of products and materials stored on the site. This shall include all Government Furnished Material (GFM) as provided in this contract.

The Contractor and subcontractors shall maintain the job site in a neat and orderly condition. This includes the daily removal of rubbish, waste, tools, equipment, and materials not required for the work in progress.

Special conditions must be adhered to while working at the sites. These are FAA facilities used for navigational purposes. Any work that affects the radiated signal as determined by the Contracting Officer’s Representative (COR) will be stopped immediately and a determination will be made on how to proceed. The work will require a facility shutdown must be coordinated by the COR with the Center, which base their decision to release the equipment for shutdown on factors such as weather, adjacent facilities, ATCT and workload. This shutdown must be scheduled with the Center a minimum of 24 hours before the commencement of said work.

1-2.4 Work Hours The contractor shall work between the hours of 8 am and 4:30 pm, Monday through Friday. All overtime or work outside of the normal work hours shall be coordinated with the RE or COR a minimum of 48 hours in advance.

1-3

TEMPORARY FACILITIES

1-3.1 General The Contractor shall provide and pay for all temporary services and facilities as specified below and as necessary for the proper and expeditious execution of the work.

1-3.2 Temporary Toilets and Sanitation

The Contractor shall provide ample and suitable on-site sanitary conveniences with proper enclosures for the use of all workers. Such conveniences shall be kept clean, be properly ventilated and shall be installed and maintained in conformity with requirements of all laws and ordinances governing such installation. Locations shall be subject to the RE or COR approval. After completion of the work, such conveniences shall be removed from the site.

1-3.3 Temporary Electric Lighting and Power

The Contractor shall provide and maintain a temporary lighting and power system for construction and inspection purposes. The Contractor shall make all necessary arrangements for temporary electrical services and shall provide and pay for all temporary work.

1-4

CONTRACT CLOSEOUT

General

The Contractor shall require each subcontractor engaged upon the work to bear full responsibility for cleaning up during and immediately upon completion of his work. All rubbish, waste, tools, equipment and other apparatus caused by or used in the execution of the work shall be removed. This shall in no way be construed to relieve the Contractor of his primary responsibility for maintaining the site clean and free of debris, and leaving all work in a clean and proper condition acceptable to the RE or COR.

1-4.1 Rubbish Removal

Immediately after unpacking, all packing material, case lumber, wrappings, or other rubbish, flammable or otherwise, shall be collected and removed from the site and disposed of in accordance with local regulations on a daily basis.

1-4.2 Overall Cleaning

Immediately before the final inspection, the surrounding areas shall be thoroughly cleaned by the contractor, including but not limited to the following:

a) For all construction facilities, debris and rubbish shall be removed from the site.

b) All tools, scaffolding, temporary utility connections or buildings, belonging to the contractor or used under his direction shall be removed from the site.

1-5

COMPLETION CERTIFICATE

When the Contractor considers the work is complete, he shall submit written certification that contract documents have been reviewed; work has been inspected for compliance with contract requirements; equipment and systems have been tested in the presence of the RE or COR and are operational.

1-5.1 Punch List

The Contracting Officer will furnish the Contractor with a list of discrepancies in the work, material and equipment noted during the final inspection.

DIVISION 2 - SITE WORK

2-1

GENERAL

2-1.1 Protect pavement, drainage and utility lines on or adjacent to the site, and any damage thereto shall be repaired immediately at the Contractor's expense. Remove from paved areas any material that falls from the Contractor's equipment.

It is understood and agreed that the FAA does not guarantee the accuracy or the completeness of the location information relating to existing utility services, facilities, or structures that may be or may not be shown on the plans or encountered in the work. Any inaccuracy or omission in such information shall not relieve the Contractor of his responsibility to protect such existing features from damage or unscheduled interruption of service.

Existing underground cables and ducts shown on the drawings are in their approximate locations only. In addition, other cables and utility lines may exist but are not shown. Prior to any excavation, drilling or trenching, the Contractor shall meet with FAA maintenance personnel and contact the appropriate “One Call” to mark the location of known underground cables, pipes, ducts or other facilities, which could be damaged.

The Contractor shall hand dig in the vicinity of all underground utilities.

The Contractor will be responsible for horizontal and vertical control for all new structures including footings, slabs and walkways as shown on the contract drawings. Existing benchmarks, if available and approved by the RE or COR, may be used to establish the horizontal and vertical control required.

2-2

APPLICABLE DOCUMENTS

The current issues of the following documents in effect on the date of the Request for Offer form a part of this specification and are applicable to the extent specified herein.

· American Association of State Highway and Transportation Officials (AASHTO) T99 Moisture Density Relations of Soils Using a 5.5 lb. Rammer and 12-inch Drop.

· FAA Order 6950.22, Maintenance of Electrical Power and Control Cables

· FAA-C-1217, Electrical Work, Interior

· FAA-C-1391, Installation and Splicing of Underground Cables

· FAA-STD-019, Lightning Protection, grounding, Bonding, and Shielding Requirements for Facilities.

2-3

GRADING

2-3.1 Grading

The Contractor shall grade areas to drain away from structures and to prevent ponding. Finish surfaces free from irregular surface changes.

2-3.2 Disposal of Excess Materials

The Contractor shall remove excess materials immediately from the site, except as otherwise specified, including all excess earth and excavated materials unsuitable for fill, including any rubbish. All removals shall be in conformance with applicable Government, and local regulations.

2-4

TRENCHING AND UNDERGROUND CONDUIT INSTALLATION

2-4.1 Trenching

The contractor shall excavate and install rigid conduit to extend the existing power, signal, or control cables to the new fold down pole. Rigid non-metallic conduit shall be used for the signal cables and rigid metallic conduits shall be used for the power cables. All trenches shall run in essentially straight lines to such a depth that the conduit will be at the maximum depth of frost protection. All trenches shall be a minimum of 12" inches wide. The contractor shall hand dig at any location in close proximity to other underground cables. The FAA shall locate and mark any underground cables that cross, or are close to, the trenching area. All trenching will be within leased property boundaries. All underground cable trenching shall conform to FAA Specification FAA-C-1391c. Conduit shall not vary more than four (4)" either side of the straight line layout.

2-4.2 Trench Backfilling

Backfill and fill shall be placed in horizontal layers not exceeding loose depths of 8 inches. Each layer shall be properly moistened and compacted to 95% maximum density, as specified herein, by power operated mechanical equipment. Unless otherwise directed by the RE or COR, no backfill shall be placed against footings within 7 days after footings or slabs are cast in place. No fill or backfill operations shall be performed when weather conditions are determined by the RE or COR to be too wet or cold to permit such operations. Trenches shall be graded even with adjacent ground area and covered with aggregate surfacing.

2-4.2.1 Satisfactory Material Material suitable for fill, backfill and embankment purposes shall be reasonably free of shale, sod, clods, stones larger than 4 inches, organic debris, trash and frozen material. Only materials suitable for obtaining the degree of compaction specified herein shall be used.

2-5 FOUNDATION EXCAVATION and BACKFILLING

2-5.1 Excavation

All excavation shall be considered unclassified and includes the removal of all materials of every name and nature, including all earth, rock of any type and obstructions of any type, either natural or man made which can be removed by a normal excavation practice and is required for the installation of all work.

The excavation shall be protected from collapse as required.

2-5.1.1 Over Excavation Where excavation for footings and foundations is carried to a depth greater than required, backfilling with earth will not be permitted. In such instances, backfilling shall be done with concrete at no additional cost to the Government.

2-5.1.1.1 Wet Excavation:

Water shall not be allowed to remain in or around any part of the excavation. Dewatering shall be performed as necessary to keep the excavation dry.

2-5.1.2 Utilization of Excavated Material The Contractor shall dispose of all unsatisfactory or excess material removed from the excavations off the site. In the event excavated material is not suitable or sufficient amounts are not available to meet the grade requirements of the site, the Contractor shall make his own arrangements to provide for offsite sources. The material shall be subject to the RE or COR approval. Excess excavated soil, if any, shall be disposed of off the project site in accordance with federal, state and local ordinances at no cost to the government.

2-5.1.3 Inspection of Excavated Area

When excavations have reached the required depths, the excavated surfaces shall be inspected and approved by the RE or COR before proceeding with further construction in the excavated area.

2-5.2 Filling and Backfilling 2-5.2.1 General

Unless otherwise specified, place all fill in layers compatible with compaction requirements, but not in layers exceeding eight inches for the entire width so that each layer can be uniformly and properly compacted.

2-5.2.2 Foundation Backfill

Backfill shall be of acceptable clean earth, free of debris, organic, foreign, expanding or shrinking material. Compact the backfill to 95 percent maximum density. After foundations have been constructed and have reached adequate set, excavations shall be backfilled. Backfill shall be placed on both sides of the foundations at the same time, and both sides tamped prior to placing of the next layer of material. In all cases, the exterior backfill shall be sloped to drain away from the foundation at least to a slope of four horizontal to one vertical in relatively level areas; the exterior backfill shall be to a slope of ten horizontal to one vertical. Special care shall be taken to prevent any uneven wedging action against the structure. The RE or COR shall inspect all installations prior to placement of backfill.

2-6

STONE SURFACING

All crushed stone surfaces shall consist of 1” to ¾” crushed ledge rock. There shall not be any fine material. Geotextile fabric shall be placed under the stone surfaces.

2-7

DEMOLITION

The material removed shall be disposed of in accordance with all local, state, and federal rules and regulations. All foundations shall be removed to 1’ below grade. The area shall be filled and compacted to match existing grade and then seeded.

DIVISION 3 - CONCRETE

3-1

FORMWORK

3-1.1 Design of Forms

All formwork shall be designed in accordance with ACI-318 and this section. Forms shall conform to shapes, lines, and dimensions of the members shown on the plans, and shall be sufficiently tight to prevent leakage of mortar. They shall be properly braced or tied together so as to maintain position and shape.

The contractor shall install two Ewing pole foundations per FAA drawings and Ewing requirements. Pole anchor bolts to be supplied by FAA.

3-2

REINFORCEMENT

3-2.1 Reinforcing Bars

All reinforcing steel, unless noted on the plans, shall be Grade 60 as defined in the American Society for Testing and Materials, "Specifications for Steel Bars and Concrete Reinforcement," A615. Details of concrete reinforcement, unless otherwise shown, shall be in accordance with ACI 318 and ACI SP-66. Support and securely tie reinforcing steel to prevent displacement during placement of concrete. The reinforcement shall be protected by the thickness of concrete shown on the drawings. Where not shown, the thickness of concrete over the reinforcement shall be in accordance with ACI Standard 318.

3-3

CAST-IN-PLACE CONCRETE

3-3.1 General

The cement shall conform to Specification for Portland Cement ASTM C-150, Type I, unless otherwise specified. The concrete shall have a minimum of twenty-eight (28) day compressive strength of 4,000 psi unless otherwise specified.

Concrete aggregates shall conform to "Specifications of Concrete Aggregates," ASTM C33 except the fine aggregate shall be natural sand, and the coarse aggregate shall be crushed stone or gravel. The maximum size of the aggregate shall not be larger than ¾ inch.

Water shall be clean, free from deleterious amount of acids, alkalis, or organic materials and shall be potable. Non-potable water may be used if mortar cubes made with the water in question have 7 and 28-day strengths equal to at least 90% of companion specimens in which potable water was used.

The concrete mix shall contain an air-entraining admixture, which shall conform to ASTM C260 "Specification for Air-Entraining Admixtures for Concrete". Air content shall be five percent (5%) to seven percent (7%).

3-3.2 Preparation of Equipment and Place of Deposit

Before placement, all equipment for mixing and transporting the concrete shall be cleaned. All debris and ice shall be removed from the places to be occupied by the concrete. Forms shall be thoroughly wetted (except in freezing weather) and oiled prior to placing reinforcing steel. Subgrade shall be wetted prior to placement of concrete. The reinforcement shall be thoroughly cleaned of ice, dirt, rust scale, or other coatings.

Excess water shall be removed from place of deposit before concrete is placed. All laitance and other unsound material shall be removed from hardened concrete before additional concrete is added. Excavation deeper than the required depth shall be brought to the correct level with plain concrete, same strength as foundation concrete, which shall be allowed to harden at least twenty-four (24) hours before the foundation concrete is placed.

3-3.3 Mixing

All concrete shall be mixed until there is a uniform distribution of materials and shall be discharged completely before the mixer is recharged.

Ready-mixed concrete shall be mixed and delivered in accordance with requirements of "Specification for Ready-Mixed Concrete" (ASTM C94) or "Specification for Concrete Made by Volumetric Batching and Continuous Mixing" (ASTM C685).

Job-mixed concrete shall be mixed in accordance with the following:

a) Mixing shall be done in a batch mixer of an approved type.

b) Mixer shall be rotated at a speed recommended by the manufacturer.

c) Mixing shall be continued for at least 1-1/2 minutes after all materials are in the drum, unless a shorter time is shown to be satisfactory by the mixing uniformity tests of "Specification for Ready-Mixed Concrete" (ASTM C94).

d) Materials handling, batching, and mixing shall conform to applicable provisions of "Specification for Ready-Mixed Concrete" (ASTM C94).

3-3.4 Conveying

Concrete shall be conveyed from the mixer to the place of final deposit by methods that will prevent separation or loss of materials. Equipment for chuting, pumping, pneumatically conveying concrete shall be of such size and design as to ensure a practically continuous flow of concrete at the delivery end without segregation of materials.

3-3.5 Placing

Concrete shall be placed within one and one-half (1-½) hours after mixing begins. Concrete shall be deposited as nearly and as practicable in its final position to avoid segregation due to re-handling or flowing. The placing of concrete shall be carried on at such a rate that concrete is at all times plastic and flows readily into the spaces between the bars. No concrete that has been contaminated by foreign material shall be used, nor shall re-tempered concrete be used.

Once placing is started, it shall be carried on as a continuous operation until placement is completed.

Concrete shall be placed in layers not to exceed eighteen (18) inches deep and vibrated in place. During and immediately after depositing the concrete shall be consolidated by vibrators. The concrete shall be thoroughly worked around reinforcement, around embedded fixtures, and into corners. Accumulations of water on the surface of the concrete due to water gain, segregation, or other causes shall be prevented as much as possible by employing proper placement, consolidation, and finishing practices.

Vibrators shall of the internal immersion type, operation at speeds of not less than 7,000 pulses per minute. Vibrators shall be kept constantly moving in the concrete and shall be applied at points uniformly spaced not further apart than the radius over which the vibrator is visibly effective. The entire depth of a new layer of concrete shall be vibrated. The vibrators shall penetrate several inches into the layer below to ensure thorough union of the layers. The vibrator shall not be held in one location long enough to draw a pool of grout from the surrounding concrete. Vibration shall be such that the concrete becomes uniformly plastic. Vibrators shall not be used to push concrete laterally in the forms.

3-3.5.1 Finish

Concrete shall be finished monolithically to a smooth, level surface by floating and troweling. Surfaces shall be finished by tamping the concrete with suitable tools to force coarse aggregate down from the surface, screed with straight edges, and floated to the required finish level. This shall include all cast in place bond beams and lintels. All exposed surfaces shall have a broom finish.

3-3.6 Curing

Provision shall be made for maintaining concrete in a moist condition for a period of at least seven (7) days after placement.

One coat of a liquid membrane-forming compound may be used for curing the concrete in lieu of wet curing. The compound shall be Symons-Cure & Seal, "or other approved equal compound which does not permanently discolor the concrete." On exposed surfaces, the application shall be made immediately after the concrete has been finished. If there is any delay, the concrete shall be kept moist until the application is made. After the forms are removed, the concrete shall be sprayed lightly with water, and then the coat of curing compound applied. If the forms (wood only) cannot be removed within forty-eight (48) hours, they shall still be wet down and kept wet until their removal, and then the compound applied as above.

3-3.7 Hot Weather Requirements

All hot weather concreting shall be in accordance with ACI - 305

3-4

GROUTING

3-4.1 General

This section specifies requirements for non-metallic, non-shrink, cement-based grouting.

3-4.2 Job Conditions

Do not mix or place grout when the ambient temperature is below 40 degrees F. or conditions indicate that the ambient temperature will fall below 40 degrees F. within 72 hours, unless the areas to be grouted are enclosed and heated in an approved manner or otherwise approved by the RE or COR.

3-4.2.1 Delivery, Storage and Handling

Deliver grout in the manufacturer's sealed original bags or containers bearing the manufacturers name and product identification, in a manner to prevent damage by breakage, water or moisture.

Store all material on platforms and cover as necessary to protect it from water and moisture.

Deliver, protect and handle all tools and equipment in a manner to prevent damage, which may make them defective for the purpose for which they are intended.

3-4.3 Materials

a) Grout shall be one of the following:

1. "Masterflow 713" by Master Builders

2. "Five Star Grout" by U.S. Grout Corporation

3. "Nbec" by U. S. Grout Corporation

4. "Sika 212" by Sika Corporation

b) Grout shall be premeasured and prepacked by the manufacturer, requiring only addition of potable water for mixing.

3-4.4 Preparation

Areas to be grouted as shown on the Contract Drawings shall be cleaned of all foreign materials, to the satisfaction of the RE or COR.

3-5

QUALITY ASSURANCE

3-5.1 Test of Concrete The Contractor shall submit two copies of all test results to the RE or COR.

3-5.2 Delivery Tickets

At the time of concrete delivery, the Contractor shall give the RE or COR a copy of the delivery ticket bearing the quantity, air content, and strength of the concrete and a detailed listing of all components by weight (cement, aggregate, water and additives).

DIVISION 13 – Special Construction

13-1

TILT DOWN POLE

13-1.1 General:

The FAA will furnish the tilt down poles and related appurtenances. The contractor shall ensure that the anchor bolts are correctly set for the poles and a ground connection is provided. The pole shall be installed in accordance with the Ewing requirements and related drawings.

13-1.2 Grounding:

The contractor shall excavate for and backfill in order to furnish and install the required grounding. The tilt down pole base shall be grounded by installing a counterpoise around each foundation and connecting a No. 4/0 bare copper wire to the installed facility grounding system. The facility ground and the two foundation counterpoises shall be tied together with 4/0 copper wire. The counterpoises shall consist of two ground rods and No. 4/0 copper wire. A 1/0 guard wire shall be installed 1 foot above the conduit and tied into the ground rods and counterpoises. All connections shall be made with exothermic welds. The National Electrical Code and FAA-STD-019, except where otherwise indicated, shall govern but in no case shall the code be violated.

13-1.3 Lightning Protection:

Contractor shall furnish and install copper wire, air terminals, supports, and clamps and down conductor copper wire as specified on the contract drawings and in Division 16. The down conductor wire shall be exothermically welded at the ground rods.

DIVISION 16 - ELECTRICAL

16-1

ELECTRICAL MATERIAL AND INSTALLATION

16-1.1 Work Included

The Contractor shall furnish and install all materials for exterior electrical work except for material that is provided as GFM. GFM shall be provided by the Government and installed by the Contractor. The contractor shall excavate for and backfill then furnish and install grounding and tie into existing grounding systems.

16-1.2 Installation - General

The rules, regulations and reference specifications enumerated herein shall be considered as minimum requirements and shall not relieve the Contractor from furnishing and installing higher grades of materials and workmanship than are specified herein or when so required by the Contract Drawings. This specification shall govern when conflicts occur between reference documents and this specification.

16-1.3 Workmanship

All materials and equipment shall be installed in accordance with the Contract Drawings and the recommendations of the manufacturer as approved by the RE or COR. Skilled workmen regularly engaged in this type of work shall accomplish the installation. Where required by local regulations, the workmen shall be properly licensed.

16-1.4 Materials

The Contractor shall furnish all materials required in accordance with contract drawings and specifications unless provided as GFM. Materials must comply with all contract requirements. Materials to be furnished by the Contractor shall be new; the standard products of the Manufacturer regularly engaged in the production of such materials, and of the specification requirements. Whenever Underwriter’s Laboratories, Inc., has established standards the materials shall bear the UL label.

16-1.5 Repair of Existing Work

Electrical work shall be carefully laid out in advance. Where cutting, channeling, chasing, or drilling of floors, wall partitions, ceilings, or other surface is necessary for the proper installation, support, or anchorage of the conduit, raceways, or other electrical work, it shall be carefully done. Damage to the building, piping, or equipment shall be repaired by skilled mechanics of the trades involved at no additional cost to the government.

16-2

APPLICABLE DOCUMENTS

Included as part of this specification are the current issues of the following documents in effect on the date of invitation for bids.

16-2.1 Federal Specifications

J-C-30

Cable and Wire, Electrical (Power, Fixed Installation)

W-C-582

Conduit, Raceway, Metal, and Fittings; Surface

W-C-586

Conduit Outlet Boxes, Bodies, and Entrance Caps, Electrical: Cast Metal - For Shore Use

W-J-800

Junction Box; Extension, Junction Box: Cover, Junction Box (Steel, Cadmium or Zinc - Coated)

W-S-610

Splice, Conductor

QQ-W-343

Wire Electrical Uninsulated

WW-C-566

Conduit, Metal, Flexible

WW-C-581

Conduit, Metal, Rigid; and Coupling, Elbow, and Nipple, Electrical Conduit: Zinc Coated

16-2.2 Military Documents

MIL-P-15147

Primer and Enamel, Coal Tar

MIL-R-21931

Resin, Epoxy

16-2.3 FAA Standards

FAA-STD-019

Lightning Protection, Grounding, Bonding and Shielding Requirements for Facilities.

FAA-C-1217

Electrical Work, Interior.

FAA-C-1391

Installation and splicing of underground cables.

FAA Order 6950.22 Maintenance of Electrical Power and Control Cables

16-2.4 National Fire Protection Association (NFPA) Publications

National Electrical Code

Lightning Protection Code

16-2.5 National Electrical Manufacturers Association (NEMA) Standards

WD1

General Purpose Wiring Devices

16-2.6 Underwriters Laboratories, Inc. (UL) Standards

UL 50

Cabinets and Boxes

UL 96A

Master Labeled Lightning Protection

UL 98

Switch, Box, Surface Mounted

UL 870

Wireways, Auxiliary Gutters and Associated Fittings

16-3

GROUNDING

The grounding system for the facility shall be as indicated on the Contract Drawings and as specified herein. The National Electrical Code and FAA-STD-019, except where otherwise indicated, shall govern but in no case shall the code be violated. The contractor shall furnish the materials and install the grounding system.

16-3.1 Grounding Systems

Exothermic welding shall be used to make all connections to the ground rods, guard wire and rigid galvanized steel conduits.

16-3.2 Grounding Electrodes

The grounding electrode shall be as shown on the contract drawings. The rods shall be ¾-inch diameter by 10 feet long copper-clad steel

16-3.3 Equipment Grounding Conductor

All electrical equipment shall be grounded by means of a separate green insulated ground wire routed within the raceway. The ground conductor shall be connected to the power panel or lighting panel equipment ground bus. Equipment or device mounting shall be bonded to the metal structure by means of metal-to-metal contact. All metallic non-current carrying parts of electronic equipment shall be grounded to this equipment grounding system.

16-3.4 Lightning Protection All lightning protection components shall be UL rated for use as a lightning protection system.

16-3.4.1 Down Conductors

Shall be Thompson #32, or equal and fastened as per FAA-STD-019.

16-3.4.2 Air Terminals Shall be copper, 5/8” in diameter by 3 feet long and have a blunt point. Air terminal shall extend a minimum of 10” above the highest object.

16-4

WIRE METHODS

Unless otherwise indicated, wiring shall consist of insulated copper conductors installed in heavy-wall rigid galvanized steel and PVC conduit. PVC conduit shall be used for the runs between the building and the new tower and steel conduit shall be used for the electrical enclosures. A 1/0 guard wire shall be installed 1 foot above the PVC conduit. The guard wire shall be exothermically welded to a ground rod and be tied together with existing counterpoise and grounding systems by exothermic welds.

16-4.1 Raceway System

Each run shall be complete and shall be fished and swabbed before conductors are installed. Ends of conduit systems not terminated in boxes or cabinets shall be capped. Exposed raceways shall be installed parallel to or at right angles with the lines of the structure. Crushed or deformed raceways shall not be installed. A pull wire shall be installed in all empty tubing and conduit systems. The pull wire shall be No. 14 AWG zinc coated steel, or plastic with a minimum 200-pound tensile strength. Ten inches of slack shall be left at each end of the pull wire. Where conduit has to be cut in the field, it shall be cut square using a hand or power hacksaw or approved pipe cutter using cutting knives. The cut ends of the field-cut conduit shall be reamed to remove burrs and sharp edges. Where threads have to be cut on conduit, the threads shall have the same effective length and shall have the same thread dimensions and taper as specified for factory cut threads on conduit. Conduits installed with threads not complying with these requirements shall be removed and replaced with conduits that comply.

Elbows, fittings, offsets, etc, shall be preformed and similar in materials and construction to the conduit.

Couplings shall be of a type to provide a watertight installation of the conduit system.

16-4.2 Heavywall Zinc Coated Rigid Steel Conduit

Heavywall zinc coated rigid steel conduit shall conform to Federal Specification WW-C-581. Rigid steel conduit may be used in all locations. Rigid steel conduit shall be used for installation below slab or grade, or underground. All fittings for use with rigid steel conduit shall be of the threaded type of the same materials as the conduit. Where conduits enter boxes or cabinets without threaded hubs double locknuts shall be used plus a phenolic insulated metallic grounding bushing on the open end. Watertight hubs shall be used in exterior locations.

16-4.3 Rigid Non-Metallic Conduit Rigid plastic conduit shall be Schedule 80 heavywall polyvinyl chloride (PVC) conforming to UL651. PVC fittings shall be used with PVC conduit assembled in accordance with Manufacturer’s instructions. A PVC threaded fitting with locknut and plastic bushing shall be used to connect PVC conduit to boxes or cabinets without threaded hubs.

16-4.4 Conduit Location

Contractor shall determine the exact location of the conduits in the field. Conduit runs as shown in the contract drawings are for clarity purpose only.

16-4.5

Control Box

Exterior enclosure shall be NEMA 4X, stainless steel with a continuous hinged door and hasp for padlocking the enclosure cover. The FAA will wire the box.

LIST OF GOVERNMENT FURNISHED MATERIAL

· Ewing 15 foot fold down poles with mounting frame assembly(two)

· Fold down pole appurtenances

· Anchor bolts

HLG RTR

Existing Cables into Enclosure

Z:\DO Projects\Engineering\SSC\AGC\HLG RTR\Tilt Down Poles\HLG RTR Tilt Down Poles SOW.doc