SPECIAL SPECIFICATION 7191 Illumination

Transcription

1 1993 Specifications For Routine Maintenance Contracts Only Houston District SPECIAL SPECIFICATION 7191 Illumination 1. Description. This Item shall govern for the preventive maintenance, repair and/or replacement of the various appurtenances related to illumination assemblies. 2. Materials. The Contractor shall furnish all materials, as approved by the State, called for in the plans and specifications as necessary for complete working units, unless otherwise shown on the plans and General Notes and Specifications Data Sheet(s) excluding mast arms, transformer bases, anchor bolts, and poles. The Contractor will designate, in writing, person(s) authorized to pick up material from the Department. All materials shall conform to the pertinent requirements of the following Items except as otherwise required herein: Item 610, Item 611, Item 613, Item 614, Item 616, Item 618, Item 620, Item 622, Item 624, Item 628, Item 680, "Roadway Illumination Assemblies" "Removing Roadway Illumination Assemblies" "High Mast Illumination Poles" "High Mast Illumination Assemblies" "Performance Testing of Lighting Systems" "Conduit" "Electrical Conductors" "Duct Cable" "Ground Boxes" "Electrical Services" "Installation of Highway Traffic Signals" Material deemed unsalvageable by the Engineer shall be disposed of by the Contractor at a site(s) approved by the Engineer. Any material determined salvageable shall be delivered to the District Signal Shop by the Contractor. The concrete, to be supplied by the Contractor, shall be Class "A." The Contractor shall provide to the Engineer all concrete plant tickets to verify each batch of materials. A minimum of 2 test beams shall be made for each pole foundation. The Contractor shall employ at his expense an approved commercial testing laboratory to pour and break concrete beams in lieu of all other tests for determining concrete strength. Certified reports of each break shall be submitted to the Engineer. This type of work shall be in accordance with the pertinent requirements of Item 421, "Portland Cement Concrete." Prior to final payment, all salvaged material and unused material shall be returned to the District Signal Shop. Otherwise, the final payment will not be made

2 3. Equipment. The Contractor shall furnish all equipment, tools and machinery necessary for the proper prosecution of the work. This will include, but is not limited to, an aerial device capable of reaching all overhead lights, a trailer capable of hauling 50 foot luminaire poles, ditching machine, boring machine, and cable fault detectors. The equipment, tools and machinery shall be on the work site in good repair and operating condition prior to beginning work. If at any time, the Engineer determines any equipment is defective to the point that it may affect the quality of the work, that equipment shall be immediately repaired or replaced. Where it is necessary to replace duct cable and conduit, the Contractor shall furnish a trenching machine that can trench and backfill as needed. Placing duct cable, conduit and electrical conductors shall be incidental to trencher work. The Contractor will have casing, concrete vibrator and steel anchor bolt templates on the job prior to drilling foundations. Where boring is necessary, the Contractor shall furnish mechanical equipment and support personnel which can provide a maximum one (1) inch overcut for the conduit to be placed, and use of water or other fluids in connection with the boring operation will be permitted only to the extent to lubricate cutting. Water jetting shall not be permitted. Pits for boring shall not be closer than two (2) feet to the back of the curb or the outside edge of the shoulder unless otherwise directed by the Engineer. The boring method used shall not interfere with the operation of street, highway or other facility, and shall not weaken or damage any embankment, structure or pavement. The placing of the concrete, conduit, anchor bolts, and curing agent shall be incidental to install new foundations. 4. Scope of Work. The Contractor will be given a list of locations and work to be done at the pre-construction meeting. The Contractor shall make a list of the needed materials to put the illumination units back into operation. The Contractor shall be expected to begin appropriate maintenance or repairs within 48 hours of such notification of needed work or preventive maintenance. It will be the Contractor's responsibility to coordinate with the power companies any power supply problems involved in providing service to the lights. The term "duct cable" as used herein shall consist of a complete assembly of conductors enclosed in a high density polyethylene duct. All maintenance, repair, removal and/or replacement activities located near any overhead or underground utilities shall be accomplished using established industry and utility safety practices. The Contractor shall consult with the appropriate utility company prior to beginning such work. Maintenance, repair and/or replacement shall consist of the following as directed by the Engineer and shall be installed in accordance with the National Electric Code (NEC): (1) Replacement of lamps, for pole mounted and wall pack fixtures. Replacement of lamps shall include the cleaning of the glass cover (both inside and out) and the reflector with a cleaning solution as approved by the Engineer

3 In lieu of the requirements for lamps shown on the roadway illumination details (3), high pressure sodium lamps for this project shall meet ANSI C78 requirements and shall be the type that extinguishes at the end of usable lamp life and remains extinguished without cycling. 400 watt lamps shall contain less than 4.0 milligram of mercury. 250 watt lamps shall contain less than 3.0 milligram of mercury. Lamps shall be lead free. Lamps shall pass the Federal Toxic Characteristic Leachate Procedure (TCLP). All electrical connectors for breakaway poles shall be watertight and shall be designed as breakaway (Buchannan 65U, Bussmann HEBW, Littelfuse LEB, or equal) in accordance with Roadway Illumination Details (2). All electrical connections for neutrals shall be watertight. Shall be designed as be breakaway, shall have a white color marking, and shall have a permanently installed solid neutral (Buchannan 20U, Bussman HET, Littlefuse LET, or equal). Furnishing and installing the disconnect switches for underpass lighting fixtures shall not be paid for separately but shall be subsidiary to the various bid items of the contract. (2) Repair of electrical conductors or cables (breaks and shorts). The Contractor shall notify the Engineer when an underground break in a conductor, cable or conduit must be located. The Contractor will expose the break, perform the splice, install the ground box and backfill. Backfill shall be in accordance with the construction methods of Item 400, "Excavation and Backfill for Structures." An underground splice will include the replacement of up to three (3) feet of cable, regardless of the number of conductors. Only one splice will be considered for payment per trench. If more than three (3) feet of cable needs to be replaced the additional will be paid for under "Replace Duct Cable." All above ground splices which are to be performed in conjunction with a bid item will be considered subsidiary to the pertinent bid item. Above ground splices not to be performed in conjunction with a bid item will include the replacement of up to three (3) feet of conductor per splice. If more than three (3) feet of conductor needs to be replaced, the additional will be paid for under "Add or Replace Conductor." (3) The replacement of roadway illumination assemblies shall be installed in accordance with the details and dimensions as shown on the plans or as directed by the Engineer. Complete replacement will include the base, pole, mast, luminaire (sodium or mercury vapor), and all the wiring required. If at any time, pole and/or mast are to be replaced, then the luminaire (sodium or mercury vapor) will be replaced also. (4) The replacement of luminaires only will include high pressure sodium or mercury vapor and will be installed in accordance with the details as shown on the plans or as directed by the Engineer. (5) The installation of the foundation for roadway illumination assemblies and service poles shall be installed as shown on the plans and in accordance with the materials and

4 construction methods outlined in Item 656, "Foundations for Signs, Traffic Signals and Roadway Illumination Assemblies". (6) The replacement of service and service poles shall consist of the removal of an existing service pole and the installation of the new pole and related electrical services which include the conduit, electrical control panel (photo cell, circuit breaker, wire, manual switch, and electromagnetic contactor), meter base, weatherhead and pigtail (36 inches from weatherhead). These connections and installations shall be in accordance with the construction methods as outlined in Item 628, "Electrical Services". The replacement of electrical services only shall include the conduit, electrical control panel (photo cell, circuit breaker, wire, manual switch, and electromagnetic contactor), meter base, weatherhead, and pigtail (36 inches from weatherhead). (7) The installation of ground boxes shall be in conformance with the details shown on the plans. When shown on the plans, a Class "B" concrete riprap apron conforming to Item 421, "Portland Cement Concrete", shall be provided by the Contractor. It shall be placed to line and grade as approved by the Engineer. All wiring connections required inside the ground box will be considered subsidiary to this bid item. (8) Pavement bore operations will be required for placement of underground wiring under the roadway and shall be in accordance with the construction methods for boring as outlined in Item 476, "Jacking, Boring or Tunneling Pipe". The depth of the bore shall be a minimum of 60 inches below the roadway (and a minimum of 36 inches below the ditch flowline) surface extending 10 feet outside the edge of the roadway. Placement of conduit for the length of the bore will be considered subsidiary to this bid item. Electrical conductors will be paid for under the bid item "Add or Replace Conductor". (9) Other miscellaneous maintenance and repair items include the following: (a) The replacement of luminaire wall packs (sodium or mercury vapor) on poles, structures, rest areas, and maintenance warehouses. (b) The replacement of photo cells and/or brackets. (c) The replacement and/or installation of manual switches, fused disconnect switches, electromagnetic contactors, and breakers. (d) The replacement of fuse and fuse holder. (10) Conduit. Unless otherwise shown on the plans, all conductors shall be in conduit except when in metal poles. All conduit and fittings shall be of the sizes and types shown on the plans or as directed by the Engineer. Conduit terminating in posts or pedestal bases shall extend vertically approximately two (2) inches above the concrete foundation. Field bends in rigid metal conduit shall have a minimum radius as required by the NEC

5 Each length of galvanized rigid metal conduit, where used, shall be reamed and threaded on each end and couplings shall be made up tight. Zinc rich paint shall be used on threads of all joints in accordance with Item 445, "Galvanizing". PVC conduit shall be joined by solvent-weld method in accordance with the conduit manufacturer's recommendation. No reducer couplings shall be used unless specifically indicated on the plans. All conduit and fittings shall have the burrs and rough places smoothed and shall be clean and free of obstructions before the cable is installed. Ends of conduit shall be capped or plugged until starting of wiring. Upon request by the Engineer, the Contractor shall draw a full-size metal brush, attached by swivel joint to a pull tape through metal conduit and a spherical template having a diameter not less than 75 percent of the inside diameter through conduits to insure that the conduit is clean and free from obstructions. A nylon or non-metal pull tape shall be used in pulling cables and conductors through PVC conduit. The conduits shall be placed as shown on the plans or as directed by the Engineer. Continuous runs of conduit attached to structures in excess of 150 feet shall have expansion joints at mid-span or 150 foot intervals and at structure expansion joints or as shown on the plans. Spacing of conduit hangers shall be as specified in the current issue of the NEC. Conduit hangers shall not be attached directly to prestressed concrete girders. Underground conduit shall be placed in accordance with the lines, grades, details and dimensions shown on the plans or as otherwise approved by the Engineer. Unless otherwise shown on the plans underground conduit shall be installed a minimum of 18 inches deep. Installation of conduit shall be in accordance with the requirements of the NEC. Conduit placed for concrete encasement shall be secured and supported in such a manner that the alignment will not be disturbed during placement of the concrete. No concrete shall be placed until all of the conduit ends are capped and all box openings closed. (11) Trenching. The trench excavation and backfill shall be as shown on the plans and in accordance with Item 400, "Excavation and Backfill for Structures", except for measurement and payment. Where existing surfacing is removed for placing conduit, repair shall be made by backfilling with material equal in composition and density to the surrounding areas and by replacing any removed surfacing, such as asphalt pavement or concrete riprap, with like material to equivalent condition. 5. Licenses. Unless otherwise designated in the General Notes and Specification Data Sheet(s), the Contractor or the Superintendent shall hold a Master Electrician's License from a city with a population of 50,000 or greater. There shall be at least one Journeyman Electrician on the project at all times while work is in progress

6 A copy of the Contractor's or Superintendent's Licenses must be submitted prior to work beginning. The Journeyman's License must be available on the jobsite during the performance of any work. The electrician shall be on the job at all times and shall be the individual who either does or supervises the work, and shall be the individual who makes out the appropriate forms upon completion of the work. 6. Scheduled Preventive Maintenance for High Mast Luminaires. The Contractor shall complete and sign Luminaire Preventive Maintenance for High Mast Lighting reports. These forms shall be filled out by the Contractor, legibly and completely. The inspector will also sign each report. In addition, the Contractor shall list all materials used at this location. The Contractor shall inspect the following listed items and perform the below listed services. (1) Lower ring and inspect mechanism. (2) Inspect and fill gear box lubrication reservoir. (3) Adjust brake mechanism to proper torque. (4) Inspect cable drum bolts for proper torque. (5) Inspect all wires and cables for deterioration or wear. (6) Inspect safety chains. (7) Inspect all foundation bolts. (8) Touch up rust spots with cold galvanize spray. (9) Replace luminaire lamps and clean fixtures as necessary. (10) Replace luminaire ballast as necessary. (11) Replace aviation warning lamps as necessary. (12) Repair short or open circuits as necessary. (13) Raise ring to proper position. 7. Measurement. This Item will be measured as follows: (1) Replace Roadway Illumination Assembly - by each Roadway Illumination Assembly complete in place. (2) Install New Luminaire Foundation - by each foundation complete in place. The concrete and work necessary to remove the existing foundation 24 inches below grade shall be considered as incidental to install the new foundation. (3) Trenching - by the linear foot of trench complete in place. (Conduit and Duct Cable will be paid for under other items.)

7 (4) Boring Under Roadway - by the linear foot of bore and will include making connections to provide a working system. (5) Replace Roadway Illumination Assembly Fixture - by each fixture complete in place. (6) Replace Wallpack Illumination Assembly Fixture - by each complete in place. (7) Replace Luminaire Lamp - by each lamp replaced complete in place. (8) Replace Fuse - by each fuse replaced, of the size or type specified, complete in place. (9) Replace Fuse Holder (including fuse) - by each fuse holder replaced, of the size or type specified, complete in place. (10) Scheduled Preventive Maintenance (High Mast Lighting) - by each pole. Each pole will be considered as one complete installation regardless of the number of luminaires on the ring. (Replacing Lamps and Ballast will be paid for under other items.) (11) Replace Luminaire Lamp (High Mast Lighting) - by each lamp replaced complete in place. Lowering of the ring when replacing the lamp will be paid for under other items. (12) Replace Aviation Warning Lamp (High Mast Lighting) by each warning lamp replaced complete in place. Lowering of the ring when replacing the lamp will be paid for under other items. (13) Replace Ballast (High Mast Lighting) - by each ballast replaced complete in place. Lowering of the ring when replacing the lamp will be considered subsidiary to this bid item. (14) Install Conduit (Attached to Structures) - by the linear foot of conduit installed as measured along the conduit. (Cable and Trenching will be paid for under other items.) (15) Replace Photo-Electric Cell - by each photo electric cell replaced complete in place. (16) Replace Electrical Service (Type A - 30 Amp)(Excluding Pole) - by each replaced complete in place. (17) Install Ground Box (Type 1) - by each ground box replaced complete in place. (18) Raise and Lower Ring (High Mast Lighting) - by each raising and lowering of ring complete in place, not part of scheduled preventive maintenance. (19) Replace Timber Electrical Pole (excluding electrical service equipment) - by each timber electrical service complete in place. (20) Replace Steel Pole Electrical Service with Foundation (excluding electrical service) - by each steel pole electrical service complete in place. (21) Replace Illumination Mast Arm - by the each complete in place. (22) Replace Duct Cable - by the linear foot of cable complete in place. (Trenching will be paid for under other items.)

8 (23) Replace Conductor (Of Type Specified) - by the linear foot of conductor complete in place. (24) Underground Splice - by the each complete in place. (25) Replace Underground Conduit by the linear foot complete in place. (Cable and Trenching will be paid for under other items.) (26) Replace Manual Hand-Off-Automatic Switch - by the each complete in place. (27) Replace Fused Disconnect Switch - (Including Hand-Off-Automatic Switch) - by the each complete in place. (28) Replace Electromagnetic Contactor - by the each, of the size or type specified, complete in place. (29) Replace Meter Base - by the each complete in place. (30) Replace Circuit Breaker - by the each, of the size or type specified, complete in place. 8. Payment. The work performed and the materials furnished in accordance with this Item and measured as provided under "Measurement" will be paid for at the unit prices bid for the various designations. These prices shall be full compensation for furnishing and placing concrete, for obtaining all materials from State warehouse locations and transporting materials to the job site, and for all labor, tools, equipment, and incidentals necessary to complete the work