916.08 991 SECTION 917 – ROADWAY AND STRUCTURE LIGHTING MATERIALS
917.01 General Requirements ................................ ................................ .. 991
917.02 Roadway Lighting St andards ................................ ...................... 992
917.03 Lighting Assembly Strength Test ................................ ................ 998
917.04 Wiring ................................ ................................ .......................... 998
917.05 Metallic Conduit ................................ ................................ ......... 999
917.06 Metallic Conduit Fittings ................................ ............................. 999
917.07 Non -metallic Rigid Conduit ................................ ........................ 999
917.08 Luminaires ................................ ................................ .................. 999
917.09 Fittings, Pull Boxes, and Bends ................................ ................ 1000
917.10 Relays, Switches, Control Cabinets, Etc. ................................ ... 1000
917.11 Service Poles and Wood Standards ................................ ........... 1000
917.12 Guying Components ................................ ................................ . 1000
917.13 Grounding Materials ................................ ................................ . 1001
917.14 Splicing Materials ................................ ................................ ..... 1001
917.15 Drag Wire ................................ ................................ ................. 1001
917.16 Photoelectric Relay ................................ ................................ .... 1001
917.01 General Requirements
Prior to making any purchases, submit for approval a complete list of all proposed materials. Include on the list the manufacturer’s name, catalog number, and such other defin itive or descriptive data as is necessary to adequately define the item. When requested by the Engineer, furnish samples of the material and notarized certificates by the manufacturer that the material meets the requirements of these Specifications and al l industry standards referred to herein. Obtain all guarantees on mechanical and electrical equipment furnished by the manufacturer and submit them to the Engineer. The Engineer will then transmit these guarantees to the agency responsible for future main tenance of the equipment. 917.02 992 Provide material and equipment that is designed, manufactured, and tested in accordance with the requirements of at least one of the following societies: ASTM, IPCEA, NEMA, IEEE, ANSI, and AASHTO . Provide material that is UL appr oved and bears the UL label. Only furnish new materials and equipment under these Specifications.
917.02 Roadway Lighting Standards
Meet the following requirements for prestressed concrete, aluminum, and steel lighting standards . Furnish standards of the design and dimensions shown on the Plans, and that conform with AASHTO Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals. Include calculations for the design of each type of pole and bracket arm length with the shop drawings when submitted for approval.
A.Prestressed Concrete
1.Scope. These Specifications apply only to the manufacture of concrete lighting standards used to support lighting units.
2.Method of Manufacture. Manufacture a ll standards by an approved method that will ensure dense and uniform concrete. Place the concrete in one continuous operation. Use a manufacturing method that will produce a smooth cable raceway of 2 inches up to the hand hole, and a 1 -inch raceway abov e the hand hole.
3.Curing. Following the casting operation, cure the concrete with low temperature saturated steam. Following the steam curing and while reducing the curing temperature, do not subject the standards to severe temperature changes.
4.Anchor Bas e. Furnish standards with the type of base shown on the Plans. Cast the base as an integral part of the standard.
5.Foundations. Where shown on the Plans, furnish the standards with a precast butt foundation that is cast as an integral part of the standard. Provide a conduit entrance slot of not less than 2 x 9 inches in the precast butt base at the location shown on the Plans. 917.02 993 6. Anchor Bolts. Use anchor bolts of high strength steel meeting the requirements of ASTM F1554, Grade to be determined by design . Fit each anchor bolt with a hex nut and lock -washer.
7.Aluminum Bracket Arm. Fabricate aluminum bracket arms, if specified, from aluminum alloy pipe or tapered tubes. Use pipe conforming to the requirements for nominal 2 -inch diameter or larger Schedule 4 0 pipe of aluminum alloy 6063 -T6, ASTM B241. Use tapered tubes conforming to the requirements for aluminum alloy 6063 -T6, ASTM B221. Use cast aluminum clamps of Aluminum Alloy No. B -443.
8.Steel Bracket Arms. Fabricate steel bracket arms, if specified, from nominal 2 -inch diameter or larger Schedule 40 pipe conforming to ASTM A53. Galvanize the steel bracket arm after fabrication in accordance with ASTM A123. Take precautions to obtain high quality galvanized coatings in accordance with ASTM A385. The design and dimensions of the bracket arm assembly shall be as shown on the Plans. Ensure that the installed bracket will provide a weather-resistant connection with smooth wiring raceway. Use stainless steel bolts and nuts. Hot -dip galvanize all other ste el parts and associated hardware in accordance with ASTM A123 or ASTM A153.
B.Aluminum
1.Scope. These Specifications apply only to the manufacture of aluminum lighting standards used to support lighting units.
2.General. Provide poles consisting of an aluminum shaft having a base attached to the lower end and complete with anchor bolts where required. Use materials conforming to the AASHTO Standard Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals. Perform welding in accordance with AASHTO Standard Specifications for Structural Supports for Highway Signs, Lum inaires, and Traffic Signals.
3.Shaft. Provide a shaft of either spun seamless tubing or formed sheet aluminum. The shaft may have one continuous longitudinal weld. Provide the pole shaft with a uniform taper of approximately 917.02 994 0.14 inch per foot, or taper in increments as approved by the Engineer. Furnish shafts in either one or two pieces in accordance with the manufacturer’s current practices; however, if the required shaft length exceeds standard shipping limits, furnish the shaft in two pieces. Assemble the two-piece shafts by telescoping the upper section over the lower section with a firm tapered fit. The telescoping length of the shaft shall be not less than 14 inches. Assemble the shaft in the presence of the Engineer or a qualified representative authorized by the Engineer. Ensure that the sections are correctly plumbed and force fitted. Do not weld the joint. Provide an opening near the top of the shaft to provide a cable entrance from the shaft into the bracket arm. Design the opening to provide a smooth cable guide for wiring. Equip the top of the shaft with a removable pole top of aluminum alloy held securely in place with set screws. The shaft (excluding transformer base standards) shall have a reinforced handhole, of the size shown on the Plans, with a bolt -on cover. Provide a grounding nut or lug for accommodating a 1/2 -inch UNC threaded bolt or stud in the shaft or base.
4.Anchor Base. The shaft shall have an anchor base that is strong enough to develop the full strength of the shaft it supports. Provide the base with four holes to receive the anchor bolts and a suitable means for attaching bolt covers. Provide four removable bolt covers with each base.
5.Breakaway Device . Provide a breakaway device conforming to the breakaway characteri stics as established by Section 12 of the AASHTO Standard Specifications for Structural Supports for Highway Signs, Luminaires , and Traffic Signals. To determin e if an item meets the breakaway requirements of the AASHTO Standard Specifications, follow testing and reporting procedures comparable to those given in NCHRP Report 153. Acceptance may be based on a single test if the test change in momentum and the anal ytically inferred changes in momentum over the speed range are less than 750 pound -seconds. If the first dynamic test change in momentum is between 750 and 1,100 pound- 917.02 995 seconds, perform a second dynamic test unless assurance that the test results are repre sentative of what would result from further dynamic tests can be demonstrated analytically and statically. The results of the second test must also meet the specification requirements. Furnish documentation of the breakaway characteristics to the Enginee r prior to fabrication.
6.Bracket Arm Aluminum. Provide bracket arms for aluminum standards that meet the same requirements as specified in
917.02 A.7 for aluminum bracket arms for concrete standards.
7.Anchor Bolts. Provide anchor bolts of high -strength ste el, each fitted with a hex nut and lock -washer. Each anchor bolt shall be capable of anchoring the bottom end in the concrete foundation and shall be threaded at the top end. The exposed portion of the threaded end of the anchor bolt, all nuts, washers, couplings, studs, and other fasteners shall be zinc coated, unless otherwise specified, in accordance with ASTM A153. Ensure that the anchor bolts are capable of resisting, at yield strength stress, the bending moment of the shaft at its yield strength st ress.
8.Finish. All hardware not otherwise specified shall be aluminum or stainless steel. Furnish all materials in natural aluminum color. Furnish pole shafts with either a polished or brush finished surface. Tire-wrap shaft and bracket arm assemblies w ith a heavy water - resistant paper to provide protection during shipment and installation.
C.Steel
1.Scope. These Specifications apply only to the manufacture of steel lighting standards used to support lighting units.
2.General. Provide poles consisting of a s teel shaft having a base welded to the lower end and complete with anchor bolts. All castings shall be clean, smooth, with details well defined and true to pattern. Provide gray iron castings conforming to ASTM A126, Class A, or ASTM A48, Class 20. Prov ide steel castings conforming to ASTM A27, Grade 65 -35.
3.Anchor Base. Secure a one -piece cast steel base, having adequate strength, shape, size, and chamfer, to the lower end of the shaft by two continuous electric arc welds. The base shall telescope the 917.02 996 shaft. Make one weld on the inside of the base at the end of the shaft; make the other weld on the outside at the top of the base so that the welded connection will develop the full strength of the adjacent shaft section to resist bending action. Provide four removable anchor bolt covers with each base. Attach each cover to the body of the base using suitable means. Provide a transformer base, if specified, of the design, dimensions, and material shown on the Plans.
4.Breakaway Device. Provide breakaway d evices conforming to the same requirements as specified in 917.02.B.5 for aluminum poles.
5.Shaft. The steel shaft may have only one longitudinal electrically welded joint and shall not have any intermediate horizontal joints or welds. Use only one length of steel sheet and form it into a continuous shaft. Fabricate the shaft from not less than No. 11 gauge steel conforming to the requirements of ASTM Sandards: A242, A595, A606 or A1008, and A1011. After forming and welding, longitudinally cold -roll the sh aft under sufficient pressure to flatten the weld and increase the physical characteristics of the shaft so that the metal will have a minimum guaranteed yield strength of 48,000 pounds per square inch. The shaft (excluding transformer base standards) sha ll have a reinforced handhole, of the size shown on the Plans, with a bolt -on cover. Provide a ground nut or lug for accommodating a 1/2 -inch UNC threaded bolt or stud in the shaft or base. Equip the top of the shaft with a pole cap held securely in plac e by set screws.
6.Bracket Arm Steel. Provide bracket arms for steel standards that meet the same requirements as specified in 917.02.A.8 for steel bracket arms for concrete standards.
7.Anchor Bolts. Provide anchor bolts for steel standards that meet the same requirements as specified in 917.02.B.7 for anchor bolts for aluminum standards.
8.Finish. Either paint or galvanize steel lighting standards as shown on the Plans and in accordance with the following: 917.02 997 a. When painting is permitted or specified, thorough ly clean all materials not to be galvanized and shop paint with one coat of zinc chromate primer meeting the requirements of
910.03 before the parts are handled or packaged for
shipment.
b.Galvanize steel standards and bracket arms, and fittings, except hardware and anchor bolts, in accordance with ASTM A123. Galvanize hardware and anchor bolts in accordance with ASTM A153.
D.High Mast
1.Scope. These Specifications apply only to the manufacture of steel lighting standards over 55 feet in length used to support head frame, ring assembly, suspension, and power cables and luminaires.
2.General. Provide poles consisting of a steel shaft, handhole, a nchor base, head frame, suspension cables, power cables, anchor bolts and foundation, and all equipment to complete the installation. Provide standards conforming to the AASHTO Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals.
3.Shaft. Provide shafts tapered from top to bottom, either cylindrical or multi-sided in cross -section, and of either single -piece or slip -fit multi-section construction. Slip -fit design shall consist of tapered sections that telescope each other and are fabricated so that the minimum length of the overlap joint is 1 -1/2 times the maximum inside diameter of the overlapping section. Number each section and show minimum and maximum overlap.
a.Provide weathering steel shafts conforming t o ASTM A595 Grade C; and miscellaneous plates, bars, and structural shapes conforming to ASTM A709 Grade 50 S. Fabricate and weld these poles in accordance with AWS 01.1.
b.Provide galvanized steel shafts of high strength steel, cold formed fabricated wi th one longitudinal weld and having a minimum yield strength of 50,000 pounds per square inch and a maximum specified yield strength of 65,000 pounds per square inch after fabrication. Base the design on the 917.03 998 yield strength of the material used but not to exceed 60,000 pounds per square inch. Hot -dip galvanize the shaft in accordance with ASTM A123.
917.03 Lighting Assembly Strength Test
Ensure that the complete assembly of all standards, except high mast, when placed upright on a suitable foundation meets the following strength requirements:
1.A vertical load of 100 pounds applied at the point of luminaire attachment shall not produce a deflection in excess of 5% of the horizontal length of the bracket.
2.A vertica l load of 250 pounds applied at the same point as in (1) above shall not produce collapse, rupture, or permanent deformation of any portion of the assembly.
3.A horizontal load of 60 pounds applied at the point of luminaire attachment and normal to plans of bracket assembly shall not produce a horizontal deflection in excess of 5% of the horizontal length of the bracket.
4.A horizontal load of 500 pounds applied at the top of the shaft, in any direction, shall not produce a deflection in excess of 8% of the length of the shaft nor shall this load cause failure of any component part of the assembly. Furnish a signed warranty from the manufacturer stating that the materials used in standard and bracket fabrication fully meet the requirements of these Specifications and will satisfactorily withstand the specified horizontal and vertical loads in the above tests.
917.04 Wiring
Use conductor cable of the size and type shown on the Plans and in strict compliance with the National Electrical Code, the National Electrical Safety Code, and local codes. Unless otherwise shown on the Plans, for all conductor cable placed in conduits and light standards, use single -conductor AWG copper with UL 917.05 999 rated 600 volt type insulation suitable for wet or dry instal lation with the conductor temperature not exceeding 167 F. Provide direct -burial cable and cable in -duct as shown on the Plans.
917.05 Metallic Conduit
Provide rigid steel conduit conforming to Federal Speci fications WW -C-581 or ANSI C 80.1. Galvanize the conduit inside and outside by one of the following processes: hot -dip galvanizing, metallized galvanizing, or electro - galvanizing. Provide flexible metal conduit conforming to Federal Specification WW -C- 566. Provide aluminum conduit conforming to Federal Specification WW -C-540. Where welded steel pipe for ordinary use is shown on the Plans, provide pipe that is hot -dip galvanized inside and out and that meets ASTM A53 for Welded Steel Pipe for ordinary uses.
917.06 Metallic Conduit Fittings
Provide galvanized steel conduit fittings conforming to Federal Specifications WW -C-581 or ANSI C -80.4.
917.07 Non-metallic Rigid Conduit
Provide non -metallic rigid conduits and fittings of polyvinyl chloride (PVC), of Schedule 40 or 80 as specified, and conforming to ASTM D1785 for conduit and ASTM D2466 for fittings; or polyethylene conduit meeting the requirements of ASTM D1248 or as specified in the Contract.
917.08 Luminaires
Provide luminaires, complete with power regulated ballast, lamps, insulating transformer (where required), and associated hardware and wiring. Luminaires shall use and include a high intensity discharge lamp of the type shown on the Plans. Ensure that the luminaires are capable of providing the specified illumination level and uniformity of illumination when installed as shown on the Plans. 917.09 1000 Photometric and electric al requirements shall equal or exceed the requirements shown on the Plans.
917.09 Fittings, Pull Boxes , and Bends
Provide fittings, pull -boxes, bends, and miscellaneous hardware in accordance with the Plans and the National Electrical Co de, and that are compatible with the adjacent conduit and materials.
917.10 Relays, Switches , Control Cabinets , Etc.
Provide relays, switches, control cabinets, and miscellaneous electrical equipment in a ccordance with the applicable codes and as shown on the Plans.
917.11 Service Poles and Wood Standards
Provide wood service poles and standards of the class and length shown on the Plans. Unless otherwise s pecified, provide poles and standards of treated southern pine, classified according to the latest American Standard Dimensions of Southern Pine Poles, and that meet the requirements of ANSI 05.1. Treat the poles with pentachlorophenol or other approved t reatment at the rate recommended by the local power authority, unless otherwise specified. The treatment shall conform to 911.03. Provide metal service poles of the kind, design, type, and dimensions shown on the Plans.
917.12 Guying Components
Provide guying components for wood poles consisting of zinc -coated wire strand, zinc -coated anchor rod, four -way expanding anchor, and necessary accessories. Use wire strand conforming to the requirements of ASTM A475 for the p articular grade, size, and type specified. Hot -dip galvanize the anchor rod, anchor, and accessories. All guying components shall be in accordance with the details shown on the Plans. 917.13 1001 917.13 Grounding Materials Provide grounding materials as shown on the Plans. Use clamps that are designed for use with the designated rods.
917.14 Splicing Materials
Use splicing materials as shown on the Plans and of a design and material consistent with t he location and type of splice indicated.
917.15 Drag Wire
For drag wire to be installed in the conduit, use nine -gauge galvanized iron wire, unless otherwise specified.
917.16 Photoelectric Relay
For the photoe lectric relay for operating the multiple relays in the control center, provide a unit type assembly with a locking type plug that will allow the unit to be easily removed for maintenance purposes. The photoelectric relay shall operate from 105 to 285 volts , shall have a minimum control range of 0.5 to 5.0 footcandles, and shall have a sensitivity adjustment for both on and off for the total range. The relay contacts shall be able to handle a minimum of 1,000 watts at 250 volts. 918.01 1002 SECTION 918 – LANDSCAPING MA TERIALS
918.01 Grass Seed ................................ ................................ ................. 1002
918.02 Commercial Fertilizer ................................ ............................... 1004
918.03 Ammonium Nitrate ................................ ................................ ... 1005
918.04 Agricultural Limestone ................................ ............................. 1005
918.05 Mulch Material ................................ ................................ .......... 1005
918.06 Inoculants for Legumes ................................ ............................. 1005
918.01 Grass Seed
A.General Provide seed meeting the requirements of the Tennessee Department of Agriculture Chapter 0080 -05-06. The Producer must be on the Department’s Producer List. Pack grass seed in new bags or bags that are sound and not mended. The vendor sh all notify the Department before making shipments to allow the Department to arrange for inspection and testing of stock. The vendor shall furnish the Department a certified laboratory report from a Society of Commercial Seed Technologists accredited commercial seed laboratory or from a State seed laboratory showing the analysis of the seed to be furnished. The report from an accredited commercial seed laboratory shall be signed by a Registered Member of the Society of Commercial Seed Technologists. The D epartment may take samples of the seed to check against the certified laboratory report. Sampling and testing will be in accordance with the requirements of the Tennessee Department of Agriculture. Use commercial grade 10 -10-10 fertilizer or equivalent.
B.Seed Groups When a seed group is used, provide mixtures meeting the requirements specified in Tables 918.01 -1 through 918.01 -5, unless otherwise specified.
Source: Tennessee Standard Specifications for Road and Bridge Construction, 2021 Edition. Pages 1000–1010 of 1,072.