Atch_21_Spec_Section_34_73_13_Mooring_and_Grounding.doc

PAVING IDIQ

Solicitation: FA4861-16-R-A300

SECTION 34 73 13

MOORING AND GROUNDING POINTS FOR AIRCRAFT

1. PART 1 - GENERAL

1.1. REFERENCES

AMERICAN WELDING SOCIETY (AWS)

AWS D1.4/D1.4M (2005; E 2005) Structural Welding Code -

Reinforcing Steel

ASTM INTERNATIONAL (ASTM)

ASTM A 436 (1984; R 2006) Austenitic Gray Iron

Castings

ASTM A 615/A 615M (2006a) Standard Specification for

Deformed and Plain Carbon Steel Bars for

Concrete Reinforcement

ASTM B 371/B 371M (2006) Copper-Zinc-Silicon Alloy Rod

ASTM B 8 (2004) Concentric-Lay-Stranded Copper

Conductors, Hard, Medium-Hard, or Soft

ASTM C 94/C 94M (2006) Ready-Mixed Concrete

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 407 (2006) Standard for Aircraft Fuel Servicing

U.S. ARMY CORPS OF ENGINEERS (USACE)

COE CRD-C 300 (1990) Specifications for Membrane-Forming

UNDERWRITERS LABORATORIES (UL)

UL 467 (2004) Grounding and Bonding Equipment

1.2. SUBMITTALS

1.2.1. SD-02 Shop Drawings

1.2.2. SD-06 Test Reports

1.2.3. SD-07 Certificates

1.2.4. Mooring Devices: Certificate of compliance stating that the mooring devices meet the specified requirements.

1.2.5. Grounding Rods: Certificates of compliance stating that the grounding rods meet the specified requirements.

1.2.6. As-Built Drawings:

The Contractor shall submit AS-Built Drawings that provide current factual information, including deviations from and amendments to the drawings and changes in the work, concealed and visible.

2. PART 2 - PRODUCTS

2.1. METALS

2.2. MOORING DEVICES

Mooring devices shall be cast in ductile iron 80-55-06 conforming to ASTM A 436. The device shall be as shown in the contract drawings. The Contractor shall submit certificates of compliance on the devices.

2.3. CORING REQUIREMENTS

The holes shall be cored using rotary, non-percussion drilling techniques. The sides of the core hole shall be perpendicular to the pavement surface. Once the pavement is cored the base course shall be excavated as shown in the drawings. The sides of the core hole shall be cleaned of laitence and roughened by sand blasting. The Contractor shall place the concrete around the mooring device in two or more lifts. The first lift shall be placed to within 5 inches of the pavement surface and thoroughly consolidated by spud vibrators. The second lift shall be placed and also consolidated by internal vibration. The surface of the concrete shall be finished and textured to match the adjacent pavement surface and elevation. White pigmented curing compound meeting the requirements of COE CRD-C 300 shall be uniformly applied at coverage of not more than 4.5 square m/L (200 square feet per gallon).

2.4. GROUNDING RODS

Grounding rods shall conform to UL 467 and shall be made of copper-clad steel. The rods shall be not less than 3/4 inch in diameter and not less than 10 feet long. The copper cladding shall conform to the applicable requirements of ASTM B 371/B 371M, Copper Alloy UNS No's. c 69400, c 69430, c 69440 or c 69450. The copper cladding shall be not less than 0.010 inches thick at any point and shall comply with adherence requirements and the banding requirements of UL 467. The Contractor shall submit certificates of compliance on the grounding rods. Rods shall be provided with a closed eye having an inside diameter of not less than 1-1/4 inches. The rods shall be pointed unless used for flexible pavement. For flexible pavement, the rods shall have 3/4 inch American standard rolled threads for attachment of a bottom anchor and shall be equipped with a screw-type bottom having a wing diameter of not less than 152 mm (6 inches).

3. PART 3 - EXECUTION

3.1. MOORING POINTS IN EXISTING RIGID PAVEMENTS

The mooring points shall be installed in 12 plus or minus 1/2 inch diameter holes cored through the pavement. The core holes shall be drilled within plus or minus 1-1/2 inches of the location shown in the contract drawings. The mooring device and attached grounding rod shall be installed within plus or minus 1/2 inch of the center of the core hole. The top of the mooring device shall be installed within 1/4 inch of the surrounding pavement surfaces, but not higher.

3.2. GROUNDING POINTS

The grounding points shall be located as shown on the task order drawings to within plus or minus 2 inches.

3.3. EXISTING RIGID PAVEMENT

Grounding rods shall be installed in holes cored through the rigid pavement using rotary, non-percussion drilling techniques. The core holes shall have a minimum diameter of 6 inches. The grounding rod shall be installed by pushing or driving the rod through the pavement base courses and subgrade. The installation technique chosen by the Contractor shall not damage the grounding rod or the pavement. Installation shall be completed by placing concrete around the grounding rod in two lifts with each lift consolidated with spud vibrators.

3.4. CLEAN-UP

The Contractor shall control all operations to minimize the amount of dust, dirt, debris and laitance in the work area. The Contractor shall clean all dirt, dust, debris, or laitance from coring or concreting operations, from the pavement surfaces prior to final acceptance.

4. PART 4 - TESTS

Resistance to ground tests shall be measured as specified in NFPA 407. Test results shall be submitted to the Contracting Officer. Any ground rods that have more than 10,000 ohms of resistance shall be reported to the Contracting Officer immediately.

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Mooring and Grounding Points for Aircraft Page 34 73 13-3 (7 Feb 2016)