36C25218B1082-0003001.pdf

Milwaukee VAMC Jul-2017

695-18-109 Replace AHU Building 123 Kitchen Construction Documents

Milwaukee, WI 53295 8/23/2018

26 41 00 - 1

SECTION 26 41 00

FACILITY LIGHTNING PROTECTION

PART 1 - GENERAL

1.1 DESCRIPTION

A. This section specifies the furnishing and installation of a complete UL master labeled lightning protection system.

1.2 RELATED WORK

A. Section 07 60 00, FLASHING AND SHEET METAL: Penetrations through the roof.

B. Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS:

Requirements that apply to all sections of Division 26.

C. Section 26 05 26, GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS:

Requirements for personnel safety and to provide a low impedance path to ground for possible ground faults.

1.3 QUALITY ASSURANCE

A. Quality Assurance shall be in accordance with Paragraph, QUALIFICATIONS

(PRODUCTS AND SERVICES) in Section 26 05 11, REQUIREMENTS FOR

ELECTRICAL INSTALLATIONS.

1.4 SUBMITTALS

A. Submit in accordance with Paragraph, SUBMITTALS in Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS, and the following requirements:

1. Shop Drawings:

a. Submit sufficient information to demonstrate compliance with drawings and specifications.

b. Show locations of air terminals, connections to required metal surfaces, down conductors, and grounding means.

c. Show the mounting hardware and materials used to attach air terminals and conductors to the structure.

2. Certifications: Two weeks prior to final inspection, submit the following.

a. Certification by the manufacturer that the lightning protection system conforms to the requirements of the drawings and specifications.

b. Certification by the Contractor that the lightning protection system has been properly installed and inspected.

AMENDMENT 3

26 41 00 - 2

c. Certification that the lightning protection system has been inspected by a UL representative and has been approved by UL without variation.

1.5 APPLICABLE PUBLICATIONS

A. Publications listed below (including amendments, addenda, revisions, supplements, and errata) form a part of this specification to the extent referenced. Publications are referenced in the text by designation only.

B. National Fire Protection Association (NFPA):

70-17...................National Electrical Code (NEC)

780-17..................Standard for the Installation of Lightning

Protection Systems

C. Underwriters Laboratories, Inc. (UL):

96-16...................Lightning Protection Components

96A-16..................Installation Requirements for Lightning

Protection Systems

467-13..................Standard for Grounding and Bonding Equipment

PART 2 - PRODUCTS

2.1 GENERAL REQUIREMENTS

A. Lightning protection components shall conform to NFPA 780 and UL 96, for use on Class I structures. Aluminum materials are not allowed.

1. Class I conductors: Copper.

2. Class I air terminals: Solid copper, 460 mm (18 inches) long, not less than 9.5 mm (3/8 inch) diameter, with sharp nickel-plated points.

4. Ground rods: NOT USED

5. Ground plates: NOT USED

6. Bonding plates: Bronze, 50 square cm (8 square inches).

7. Through roof connectors: Solid copper riser bar, length and type as required to accommodate roof structure and flashing requirements.

8. Down conductor guards: NOT USED

9. Anchors and fasteners: Bronze bolt and clamp type shall be used for all applications except for membrane roof. Adhesive type are allowed only for attachment to membrane roof materials, using adhesive that is compatible with the membrane material.

10. Connectors: Bronze clamp-type connectors shall be used for roof conductor splices, and the connection of the roof conductor to air

26 41 00 - 3 terminals and bonding plates. Crimp-type connectors are not allowed.

11. Exothermic welds: Exothermic welds shall be used for splicing the roof conductor to the down conductors, splices of the down conductors, and for connection of the down conductors to ground rods, ground plates, and the ground ring.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Installation shall be in accordance with the NEC, as shown on the drawings, and manufacturer’s instructions.

B. Coordinate installation with the roofing manufacturer and roofing installer.

C. Install the conductors as inconspicuously as practical.

D. Make connections of dissimilar metal with bimetallic type fittings to prevent electrolytic action.

E. Bond down conductors to metal main water piping where applicable.

F. Bond down conductors to building structural steel.

G. Connect roof conductors to all metallic projections and equipment above the roof as indicated on the drawings.

H. Connect exterior metal surfaces, located within 900 mm (3 feet) of the conductors, to the conductors to prevent flashovers.

I. Maintain horizontal or downward coursing of main conductor and insure that all bends have at least an 200 mm (8 inches) radius and do not exceed 90 degrees.

J. Conductors shall be rigidly fastened every 900 mm (3 feet) along the roof and down to the building to ground.

K. Air terminals shall be secured against overturning either by attachment to the object to be protected or by means of a substantial tripod or other braces permanently and rigidly attached to the building or structure.

L. Install air terminal bases, cable holders and other roof-system supporting means without piercing membrane or metal roofs.

M. Use through-roof connectors for penetration of the roof system.

Flashing shall be provided by roofing contractor in accordance with

Section 07 60 00, FLASHING AND SHEET METAL.

N. Where the drawings show the new lightning protection system connected to an existing lightning protection system with or without a UL master

26 41 00 - 4 label, the new portion of the lightning protection system requires UL inspection and a Letter of Findings.

3.2 ACCEPTANCE CHECKS AND TESTS

A. Test the ground resistance to earth by standard methods, and conform to the ground resistance requirements specified in Section 26 05 26, GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS.

B. A UL representative shall inspect the lightning protection system.

Obtain and install a UL numbered master label for each of the lightning protection systems at the location directed by the UL representative and the COR.

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