ANSI C-136.20

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ANSI C136.20-2008 American National Standard for Roadway and Area Lighting Equipment— Fiber-Reinforced Composite (FRC) Lighting Poles

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ANSI C136.20-2008

American National Standard for Roadway and Area Lighting Equipment—

Fiber-Reinforced Composite (FRC) Lighting Poles

Secretariat National Electrical Manufacturers Association Approved August 1, 2008 American National Standards Institute, Inc.

http//:www.wangd.com 最专业的电气网站 NOTICE AND DISCLAIMER The information in this publication was considered technically sound by the consensus of persons engaged in the development and approval of the document at the time it was developed. Consensus does not necessarily mean that there is unanimous agreement among every person participating in the development of this document. NEMA standards and guideline publications, of which the document contained herein is one, are developed through a voluntary consensus standards development process. This process brings together volunteers and/or seeks out the views of persons who have an interest in the topic covered by this publication. While NEMA administers the process and establishes rules to promote fairness in the development of consensus, it does not write the document and it does not independently test, evaluate, or verify the accuracy or completeness of any information or the soundness of any judgments contained in its standards and guideline publications. NEMA disclaims liability for any personal injury, property, or other damages of any nature whatsoever, whether special, indirect, consequential, or compensatory, directly or indirectly resulting from the publication, use of, application, or reliance on this document. NEMA disclaims and makes no guaranty or warranty, express or implied, as to the accuracy or completeness of any information published herein, and disclaims and makes no warranty that the information in this document will fulfill any of your particular purposes or needs. NEMA does not undertake to guarantee the performance of any individual manufacturer or seller’s products or services by virtue of this standard or guide. In publishing and making this document available, NEMA is not undertaking to render professional or other services for or on behalf of any person or entity, nor is NEMA undertaking to perform any duty owed by any person or entity to someone else. Anyone using this document should rely on his or her own independent judgment or, as appropriate, seek the advice of a competent professional in determining the exercise of reasonable care in any given circumstances. Information and other standards on the topic covered by this publication may be available from other sources, which the user may wish to consult for additional views or information not covered by this publication. NEMA has no power, nor does it undertake to police or enforce compliance with the contents of this document. NEMA does not certify, test, or inspect products, designs, or installations for safety or health purposes. Any certification or other statement of compliance with any health or safety–related information in this document shall not be attributable to NEMA and is solely the responsibility of the certifier or maker of the statement.

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American National Standard

ANSI C136.20-2008

Approval of an American National Standard requires verification by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standards developer. Consensus is established when, in the judgment of the ANSI Board of Standards Review, substantial agreement has been reached by direct and materially affected interests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concerted effort be made toward their resolution. The use of American National Standards is completely voluntary; their existence does not in any respect preclude anyone, whether he has approved the standards or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standards. The American National Standards Institute does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard in the name of the American National Standards Institute. Requests for interpretations should be addressed to the secretariat or sponsor whose name appears on the title page of this standard. CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. The procedure of the American National Standards Institute requires that action be taken periodically to reaffirm, revise, or withdraw this standard. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute.

Published by National Electrical Manufacturers Association 1300 N. 17th Street, Suite 1752, Rosslyn, Virginia 22209 www.nema.org Copyright © 2008 National Electrical Manufacturers Association All rights reserved including translation into other languages, reserved under the Universal Copyright Convention, the Berne Convention for the Protection of Literary and Artistic Works, and the International and Pan American Copyright Conventions. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. Printed in the United States of America.

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ANSI C136.20-2008

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ANSI C136.20-2008

Contents

Notice and Disclaimer .......................................................................................................................ii 1

Scope ............................................................................................................................................... 1

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References....................................................................................................................................... 1

3

Definitions ........................................................................................................................................ 1

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General ............................................................................................................................................ 2

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Shafts ............................................................................................................................................... 3

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Bolt circles........................................................................................................................................ 4

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Luminaire support arms ................................................................................................................... 4

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Wiring and wiring access ................................................................................................................. 4

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Identification ..................................................................................................................................... 5

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Performance..................................................................................................................................... 6

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Breakaway supports ........................................................................................................................ 6

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Pole deflection measurements......................................................................................................... 7

Table Standard ground line distances ....................................................................................................... 3 Figures Figures 1a, 1b, 1c ............................................................................................................................ 8

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ANSI C136.20-2008

FOR ROADWAY AND AREA LIGHTING EQUIPMENT— FIBER-REINFORCED COMPOSITE (FRC) LIGHTING POLES 1

Scope

This standard applies to fiber-reinforced composite (FRC) lighting poles used for roadway and area lighting. This standard includes nomenclature, dimensional data, performance criteria, and some interchangeability features for standard poles as well as those that must meet breakaway requirements for poles as described in Standard Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals, AASHTO LTS.

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References

2.1 Normative references This standard incorporates by undated reference provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed below. For undated references, the latest edition of the publication referred to applies (including amendments). AASHTO LTS, Standard Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals ANSI C136.3, American National Standard for Roadway and Area Lighting Equipment—Luminaire Attachments ANSI C136.13, American National Standard for Roadway and Area Lighting Equipment—Metal Brackets of Wood Poles Used in Roadway Lighting ANSI C136.21, American National Standard for Roadway and Area Lighting Equipment—Vertical Tenons Used with Post Top-Mounted Luminaires ASTM G154, Practice for Operating Fluorescent Light Apparatus for UV Exposure of Nonmetallic Materials 2.2 Informative references This standard is intended to be used in conjunction with the following publications. The latest edition of the publication applies (including amendments). ASTM A153, Specifications for Zinc Coating (Hot-Dip) on Iron and Steel Hardware ASTM D4923, Standard Specification for Reinforced Thermosetting Plastic (Composite) Poles

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Definitions

anchor base: A feature attached to the bottom end of a pole designed to be mounted on an accommodating platform. anti-rotational device: A device attached to the pole below ground level to insure the pole does not twist after installed and in service. 1

ANSI C136.20-2008

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arm: A structural member, approximately perpendicular to a pole, which supports a luminaire. bolt circle: The diameter of a circle that will intersect the centerline of the anchor bolts that are spaced equal distance to each other. direct burial: A term used to refer to a pole designed to be supported by surrounding earth or other material. effective projected area (EPA): Maximum projected area of an object multiplied by a drag coefficient (Cd) for the specific shape of the object. fiber reinforced composite (FRC): A thermosetting resinous matrix with reinforcements of glass, carbon, or other fiber reinforcements. handhole: A covered opening in the pole, the axis of which is perpendicular to the axis of the pole and located above ground level, that provides access to internal wiring and splices. lighting pole: An assembly intended for supporting luminaires. luminaire: A complete lighting unit consisting of a lamp or lamps together with the parts designed to distribute the light, to position and protect the lamp(s), and to connect the lamp(s) to the power supply. luminaire mounting height: The vertical distance between ground level and the center of the attachment point in a post top or arm-mounted luminaire. shaft: The vertical portion of the pole before installing luminaire or attachment of fittings and cutting access holes. slip fitter: A cylindrical receptacle in the base of a luminaire that engages a pole top tenon, or the end of an arm. tenon: A metal sleeve, cylinder, or other device permanently secured to, or embedded in the top of the pole, or the arm that inserts into the base (or slip fitter) of a luminaire. wire entry hole: An opening in a pole, the axis of which is perpendicular to the axis of the pole, located below ground level, which provides passage of below ground service wiring into pole cavity.

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General

4.1 Pole strength In order that the pole manufacturer may ensure the necessary pole strength for a specific application, the user should provide the following information: a) Type of pole mounting – anchor base or direct embedment. If anchor base foundation exists, specify bolt circle, bolt diameter, bolt projection and bolt pattern; b) The mounting height; c) Support arms, length, weight, effective projected area (EPA), attachment detail, diameter of tenon (11/4in. or 2in. National Pipe Size (NPS)), and position on pole; d) The weight and EPA of the luminaires (banners ,flags, or other attachments that add to the EPA and weight load on the pole); e) Maximum steady wind velocity at location where pole will be installed. If velocity is unknown, see AASHTO LTS. f) Any additional load that may be applied to the pole;

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ANSI C136.20-2008

Applicable local or states codes, if different from national codes; The number, size, and location of any access openings; Tenon diameter and length for post-top installations; The color and finish of the pole; and Other custom features.

4.2 Pole length The pole manufacturer shall determine the length of the pole that will achieve the user’s required mounting height above grade, unless the user specifies otherwise. The shaft length shall be provided with a tolerance of ± 51 mm (± 2 in.).

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Shafts

5.1 Composition of shafts Pole shafts shall be a composite of thermosetting resin reinforced with glass or other fibers of such quantity and orientation as to meet or exceed the performance requirements set forth in Section 10. 5.1.1 The resin shall be thermosetting resin containing UV inhibitor(s) and pigment throughout. 5.2 Exterior surface of shafts The exterior surface may be finished as specified but shall be free of any exposed surface fibers. The shaft shall be covered with a minimum 1.5 mil dry film thickness (DFT) urethane coating, or equivalent, that resists ultraviolet degradation as specified in Clause 9.1. 5.2.1 The shaft surface shall withstand normal conditions of handling, installation and transportation. 5.3 Direct-burial poles 5.3.1 Poles can be provided with an anti-rotational feature when specified by the user. 5.3.2 Poles shall be designed for minimum embedment depths as shown in Table 1, unless specified by the user.

Table 1 – Standard ground line distances Overall length of pole in meters (ft)

Ground line distance from butt in meters (ft)

Up to 5.5 (18) 5.6 (18.1) up to 7.6 (25) 7.7 (25.1) up to 12.2 (40) 12.3 (40.1) up to 15.2 (50) 15.3 (50.1) up to 16.8 (55)

0.91 (3) 1.22 (4) 1.52 (5) 1.83 (6) 2.13 (7)

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ANSI C136.20-2008

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5.4 Anchor base poles 5.4.1 Poles designed to be mechanically fastened to a foundation shall be provided with an anchor base plate. The total system shall be capable of withstanding the combined forces described in Clause 9.2.1. 5.4.2 The anchor base plate shall have four radial slots, or, oversize round holes (if acceptable to user), to accommodate anchor bolts on the bolt circle diameter. 5.5 Poles for post-top luminaires. These poles shall be provided with a permanently affixed tenon in accordance with ANSI C136.3 or ANSI C136.21. 5.6 Poles for support-arm application. These poles shall be provided with a removable cap to close the top of the shaft. The cap shall remain in place when subjected to maximum wind loads for which the pole is designed.

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Bolt circles

Bolt circles shall be based on the required loading, or as specified by the user.

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Luminaire support arms

The physical requirements shall conform to ANSI C136.13, ANSI C136.21, or as otherwise specified by the user.

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Wiring and wiring access

8.1 Wiring 8.1.1 Poles shall permit complete internal wiring from an underground source. 8.1.2 The pole shaft shall have internal clearance, or a raceway free of obstruction and sharp edges, of not less than 38.1 mm (1.5 in.) in diameter for the entire length. The design shall permit installation of supply conductors without damage. 8.2 Wiring access 8.2.1 The edges of wire entrance holes and hand holes shall be smooth and free from burrs.

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ANSI C136.20-2008

8.2.2 For embedded poles, a wire entrance hole with a minimum diameter of 35 mm (1.375 in.) shall be located 610 mm (24 in.) below the ground line in line with the hand hole, or as specified by the user. 8.2.3 When specified by the user, poles shall have a covered hand hole of adequate size to provide access to wiring, and not reduce the strength of the poles to levels below design loads calculated per Clause 10.2.1. Hand holes shall be a minimum of 63.50 mm (2.5 in.) x 101.6 mm (4 in.), unless otherwise specified by the user. 8.2.4 The vertical location of hand holes shall be centered 457.20 mm (18 in.) above the ground line, unless otherwise specified by the user. 8.2.5 The radial location of hand holes shall be as follows: a) Poles with support arms: 90° clockwise from the centerline of the support arm as viewed from above, unless otherwise specified by the user. b) Poles with post-top luminaires: As specified by the user. 8.2.6 The surface dimensions of covers for the hand holes shall exceed the dimensions of the hand holes by a minimum of 6 mm (0.25 in.), or be of sufficient design to prevent the entry of foreign objects larger than 1.0 mm (0.04 in.). 8.2.7 The hand hole cover shall be secured with sufficient rigidity to tightly lock the hand hole cover onto the pole.

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Identification

Poles shall be provided with a stainless steel or aluminum identification tag. The tag shall be located within 304 mm (11.97 in.) of the tip (top) of the shaft, unless otherwise specified by the user. Minimum information, unless otherwise specified by the user, shall be: a) Manufacturer’s name; b) Manufacturer’s catalog number; and c) Date of manufacture, month, and year.

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ANSI C136.20-2008

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10 Performance 10.1 General The surface of the pole shall resist degradation from the environment in which the pole is installed. The pole shall be tested per ASTM G154 for a minimum of 2500 hours and meet conditions as mutually agreed upon with user. 10.2 Physical 10.2.1 The pole, with specified luminaire, arms, and other attachments installed, shall have a minimum bending strength of at least 2 times the maximum bending moment induced by maximum windage conditions as calculated per AASHTO LTS. When a hand hole is specified, the pole shall attain this load with the hand hole in compression and the cover removed. 10.2.2 The pole shall not exceed a maximum deflection of 10 percent of the length of the pole above the grade line when subjected to the maximum loading as calculated in Clause 10.2.1, and as tested in accordance with test methods listed in Section 12. 10.2.2.1 Poles designed to support luminaires on arms should have a maximum static deflection (due to weight of arm and luminaire only) of 1% of the pole height above ground line. The maximum slope deviation of the deflection curve shall not exceed 8.89 mm (0.35 in.) as well. 10.2.2.2 Poles shall not have visible cracks once installed and loaded per requirements in Clause 10.2. 10.2.3 The pole shall have no more than 1 % permanent deflection for the loading value as calculated in Clause 10.2.1. This loading shall be applied for 5 minutes at 25o C (77o F) ± 1.5o C (4o F), with measurement being taken 5 minutes after unloading. 10.2.4 The methods of calculating the forces and bending moment acting on the pole systems shall be as described in AASHTO LTS.

11 Breakaway supports Breakaway supports, when specified by the user, shall be designed to carry loads as provided in Section 10.2.1. Dynamic performance under automobile impact shall also be considered. Breakaway approval from the Federal Highway Administration (FHWA) can be accomplished through approved testing by an independent testing facility approved by the FHWA. The results shall meet or exceed the requirements described in AASHTO LTS.

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ANSI C136.20-2008

12 Pole deflection measurements 12.1 General The test set-up is illustrated in Figure 1c. There are three methods of measuring deflection on a loaded pole. These are illustrated on Figure 1a and 1b. All three methods can be used simultaneously to allow comparison of independent sets of data.

12.2 Method I As shown in Figure 1a, a cord shall be taped to the base of the pole-at the ground line and the butt only. In the no-load state, the cord is lined up straight with the centerline of the pole. As the pole is loaded, the base moves and the cord shall be moved—at the top of the pole—to keep it straight with the base portion. True deflection of the pole shall be directly measured from the cord to the pole at the load point. This method automatically compensates for base movement.

12.3 Method II This method uses fixed reference points for measuring movement of the pole as the pole is loaded. As shown in Figure 1b, the points, physically, are three posts arranged vertically on the floor adjacent to the pole. They should not be connected to any load-bearing member of the test fixture. Their lateral distance from the pole is of no importance, but they should not be moved during any one test, because their position relative to the length of the pole is important. The three posts shall be located, as follows: a) Butt b) Ground line—varies with length of the pole c) Load point—usually 305 mm (12 in.) from the top of the pole Measurements are made from these posts to the centerline of the pole at each load level. There is movement of the pole base (ground line to butt) during loading. This movement shall be taken into account when determining the load/deflection characteristics of the pole. Merely subtracting the initial from the final measurement at post 3 (load point) gives a so-called “apparent” deflection—with no allowance for the movement of the base of the pole. This apparent deflection is too high a value and would not be the same on any two identical poles. The true deflection can be determined by taking a ratio of the base movement (ground line positive movement added to the butt movement in the negative direction) over the full length of the pole, and subtracting this from the apparent deflection.

12.4 Method III A cord shall be pulled over the centerline of the entire pole when pole is unloaded. As pole is loaded, any movement at the groundline or butt should be recorded and deflections corrected to reflect the movement. The cord should not touch the pole at any time in order for movement readings to be accurately recorded. Pole deflections should be measured from the cord to pole centerline.

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ANSI C136.20-2008

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Figures 1a, 1b, 1c §

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