DIV 26 Master.pdf

FEDERAL AVIATION ADMINISTRATION January, 2014

FAA-TYS-1003480

SECTION 26 41 13 - LIGHTNING PROTECTION FOR STRUCTURES

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes lightning protection for buildings and associated structures and requirements for lightning protection system components.

1.2 REFERENCES

A. The publications listed below form a part of this Specification to the extent referenced. The publications listed below are referenced as the latest edition published as of the date of this document. The publications are referred to within the text by the basic designation only.

1. FAA Orders and Standards:

a. FAA-STD-019e, Lightning and Surge Protection, Grounding, Bonding and Shielding Requirements for Facilities and Electronic Equipment

2. Lightning Protection Institute (LPI)

a. LPI-177 Inspection Guide for LPI Certified Systems.

3. National Fire Protection Association (NFPA)

a. NFPA 70 National Electrical Code.

b. NFPA 780 Standard for the Installation of Lightning

Protection Systems

4. Occupational Safety and Health Administration (OSHA)

a. 29 CFR 1910.7 Definitions and Requirements for a Nationally Recognized Testing Laboratory (NRTL)

5. Underwriters Laboratories (UL)

a. UL 96A Installation Requirements for Lightning Protection Systems.

6. FAA-STD-019e Lightning and Surge Protection, Grounding, Bonding and Shielding Requirements for Facilities and Electronic Equipment

1.3 SUBMITTALS

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The following shall be submitted in accordance with Section 01 33 00, “SUBMITTAL

PROCEDURES.”

A. Shop Drawings: Shop Drawings detailing lightning protection system, including but not limited to air terminal locations, conductor routing and connections, bonding and grounding provisions.

Include indications for use of raceway and data on how concealment requirements will be met.

B. Product Data:

1. Roof adhesive data.

C. Test Reports

1. Field Reports

2. Field inspection reports indicating compliance with specified in Section 01 78 23, “OPERATION AND MAINTENANCE DATA.”

D. Certification: Certification, signed by Contractor, that roof adhesive for air terminals is approved by manufacturers of both the terminal assembly and the roofing material.

E. Qualification Data: For firms and persons specified in "QUALITY ASSURANCE" Article to demonstrate their capabilities and experience. Include data on listing or certification by nationally recognized testing laboratory (NRTL) or trade association. Include lists of completed projects with project names and addresses, names and addresses of architects and owners, and other information specified.

F. Operation and Maintenance Data: Prepare and distribute operations and maintenance data as specified in Section 01 78 23, “OPERATION AND MAINTENANCE DATA.”

1.4 QUALITY ASSURANCE

A. Conform to NFPA 780. Conform to UL 96A and provide UL Master Label. Conform to the most stringent requirements of LPI certification of system, and Electrical Testing Lab (ETL) Master Label, indicating system complies with specified requirements.

B. Installer Qualifications: Engage an experienced installer who is certified by the Lightning

Protection Institute as a Master Installer/Designer to install lightning protection system.

C. Listed and Labeled: Provide products specified in this Section that are listed and labeled by an organization concerned with product evaluations and that can determine compliance with appropriate standards for the current production of listed items. The terms "Listed" and "Labeled" are as defined in NFPA 70, Article 100.

D. Listing and Labeling Agency Qualifications: A NRTL as defined in 29 CFR 1910.7.

1.5 SEQUENCING AND SCHEDULING

A. Coordinate installation of lightning protection with installation of other building systems and components, including electrical wiring, supporting structures and building materials, metal bodies requiring bonding to lightning protection components, and building finishes.

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PART 2 PRODUCTS

2.1 LIGHTNING PROTECTION SYSTEM COMPONENTS

A. Materials: All equipment shall be UL-listed and marked in accordance with UL procedures.

All equipment shall be new and of a design and construction to suit the application in accordance with UL 96A. Bronze and stainless steel may be used for some components. All lightning protection materials shall be Class II, Class I not allowed.

B. Air Terminals: Air terminals shall be solid copper, unless mounted to aluminum equipment.

Copper air terminals may be nickel plated. Air terminal shall be a minimum of 12 inches in height, at least 1/2-inch diameter copper (5/8-inch diameter aluminum where required), and shall have a rounded or "bullet" point. Air terminals shall be located in accordance with the requirements of NFPA 780 and UL 96A. Air terminals shall extend at least 10 inches above the object or area they are designed to protect. Air terminals shall be placed around the perimeter of flat or gently sloping roofs at intervals not exceeding 20 feet. Wherever a risk of injury exists from falling and striking an air terminal, the tip of the air terminal shall not be less than 5 feet above the walking or working surface.

C. Main Conductors: Roof and down conductors shall be minimum class II stranded bare copper as indicated on drawing, and shall meet the requirements given in NFPA 780. Down conductors shall be routed outside of any structure, and shall not penetrate or invade that structure. Main conductors shall be continuous with no splices allowed.

D. Secondary Conductors: Shall be a minimum class II, to provide secondary or bonding conductors as indicated on drawings. Shall be bare copper.

E. Exterior Down Conductors: All conductors shall be Class II stranded bare Tinned Copper.

F. Hardware: Hardware shall meet the following requirements:

1. Fasteners: Roof and down conductors shall be fastened at intervals not exceeding 3 feet.

Fasteners shall be of the same materials as the conductor base material or bracket being fastened, or other equally corrosion resistant material. Plastic, galvanized or plated materials shall not be used.

2. Fittings: Bonding devices, cable splices, and miscellaneous connectors shall be suitable for use with the installed conductor and shall be copper or bronze with exothermic weld.

Bolt pressure connections of secondary conductors may be acceptable. Cast or stamped crimp type fittings shall not be used.

3. Guards: Guards shall be provided for all down conductors. Guards shall extend to at least six feet above, and 1 foot below grade level. Guards shall be Schedule 40 PVC.

Bonding jumpers shall be the same size as the down conductor. Crimp type fittings shall not be used.

PART 3 – EXECUTION

3.1 INSTALLATION

A. Shall be in accordance with FAA-STD-019e and not violate NFPA 780.

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3.2 EXAMINATION

A. Examine surfaces and conditions, with installer present, for compliance with installation tolerances and other conditions affecting performance of lightning protections system. Do not proceed with installation until unsatisfactory conditions have been corrected.

3.3 INSTALLATION

A. Installation shall conform to UL 96A. Installer shall provide an Underwriters Laboratories Master Label for the facility. Conform to the most stringent requirements when more than one standard is specified.

B. Conductor and Conduit Routing: Roof and down conductors shall maintain a horizontal or downward course. No bend in a roof or down conductor shall form an incline angle of less than 90 degrees, nor shall it have a bend radius of less than 8 inches. Conductors shall be routed external to buildings and 6 feet or more from power or signal conductors.

C. Down Conductor Terminations: Down conductors shall originate at the air terminals and shall be exothermically welded to a #4/0 AWG copper conductors prior to enter the ground. The #4/0 AWG copper conductor shall enter the ground and be welded to a ground rod that is exothermically welded to the Earth Electrode System. The ground rod shall be buried 18 inches vertically below ground level, and from 2 feet to 6 feet outside the foundation or exterior footing of the building. Provide number of down conductors indicated on drawings.

D. Down Conductor Location: Route down conductors outside of building facade. Conductors shall be in PVC conduit from ground to 6 feet above grade and exposed above 6 feet. Submit system plan which indicates exact location of down conductors, as well as intended equipment locations, to engineer for approval prior to installation. Vertical down conductors shall be tinned copper #4/0 bare.

E. Contracting Officer's Technical Representative Notification: Notify the Contracting Officer's Technical Representative at least 24 hours before concealing lightning protection system components.

F. Air Terminal Attachment: All air terminals shall be secured against overturning either by attachment to the object to be protected, or by means of braces that are permanently and rigidly attached to the building.

G. Metallic Bodies Subject to Induced Charges: Metallic bodies, on or below roof level, that are subject to induced charges from lightning include roof drains, plumbing vents, metal coping, metal flashing, gutters, downspouts, small metal wall vents, door and window frames, metal balcony railings, and generally any isolated metallic body within 6 feet of an exposed lightning protection system element. These metallic bodies shall be bonded to the lightning protection system using UL approval splices, fittings, and conductors. Conductors used for bonding these metallic bodies shall be class II secondary conductors in accordance with NFPA 780.

H. Exothermic Welds: Only exothermic welds are acceptable. Hydraulically crimped connectors are not acceptable. Dissimilar metal contact shall be avoided.

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3.4 CORROSION PROTECTION

A. Do not combine materials that can form an electrolytic couple that will accelerate corrosion in the presence of moisture, unless moisture is permanently excluded from the junction of such materials. Use conductors with suitable protective coatings where conditions would cause deterioration or corrosion of conductors.

3.5 FIELD QUALITY CONTROL

A. Periodic Inspection: Provide the services of a qualified inspector to perform periodic inspections during construction and at its completion, according to LPI-177.

B. UL Inspection: Apply for inspection by UL as required for UL Master Labeling of System.

C. ETL Inspection: European Test Lab to inspect completed system for conformation with specified requirements.

3.6 TEST

A. Upon completion of installation of lighting protection system, test resistance-to-ground with resistance tester. Where tests show resistance-to-ground is over 5 ohms, take appropriate action to reduce resistance to 5 ohms, or less, by treating soil proximity to ground rods with sodium chloride, copper sulfate, or magnesium. Then retest to demonstrate compliance.

END OF SECTION 26 41 13

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