SPECIAL SPECIFICATION 1924 Neighborhood Friendly High Mast Illumination System

Transcription

1 1993 Specifications CSJ SPECIAL SPECIFICATION 1924 Neighborhood Friendly High Mast Illumination System 1. Description. This Item shall govern for furnishing and installing the various types of neighborhood friendly high mast illumination system components shown on the plans. The term Neighborhood Friendly High Mast Illumination System (NFHMIS) assembly as used herein shall constitute the complete assemblage of parts, equipment and miscellaneous components including the fixtures, fixture mounting structure, and lowering device erected as shown on the plans and in accordance with these specifications, together with a pole and foundation forming a complete and independent lighting unit. 2. General. For this project, a commercially designed NFHMIS assembly, foundation and pole will be required. Design for pole and NFHMIS assembly shall meet the 80 mph wind zone requirements of the American Association of State Highway Transportation Officials (AASHTO), Structural Supports for Highway Signs, Luminaires, and Traffic Signals. Materials and construction methods shall be in accordance with the applicable requirements of Items 613, High Mast Illumination Poles, Item 614, High Mast Illumination Assemblies, and Item 416, Drilled Shaft Foundations ; standard sheets High Mast Illumination (HMIP) and High Mast Illumination Pole Foundations (HMIF), except that, poles and foundations shall be modified for the actual loading of equipment supplied. Modifications may be made as follow: drilled shaft diameter may be increased, bolt circle may be greater than shown, number of anchor bolts may be increased, and size of anchor bolts may be increased. All other details including templates, grounding, tack welding nuts, and material specifications shall be as shown on the plans. Shop drawings for fabrication of assemblies and poles shall be submitted to the Engineer for approval. Wind and weight load calculations and tests shall be submitted with the shop drawings. Shop drawings for the complete NFHMIS assembly, pole, and hardware shall be submitted together as one complete package. The Contractor shall be responsible for coordinating the pole and NFHMIS assembly details. If necessary, the Department will provide design modifications for the drilled shaft foundation. NFHMIS assembly shall meet the following requirements unless otherwise approved by the Department. a) NFHMIS assembly shall be designed and fabricated for a 40 yr. life. NFHMIS assembly shall be in accordance with the details shown on the plans. NFHMIS assembly shall be the type that raises and lowers the complete fixture mounting structure and light shields by use of a permanently installed winch located at the bottom of the pole. Electric motor and winch may be inside the pole or outside the pole. Power shall be delivered to the fixtures by means of a flexible cord with a cord connector at each end, the bottom of which must be unplugged

2 in order to lower the assembly. The fixtures shall be capable of having normal power applied with the assembly lowered by means of a maintenance jumper or other method approved by the Engineer. b) Externally mounted motors and winches shall be arranged neatly, shall not encumber maintenance access, and shall completely enclose all components in a heavy duty enclosure (minimum 12 gage galvanized or stainless steel). The enclosure and pole access door shall be capable of being locked. The Contractor shall provide locks keyed with Master #2195 for all lockable electrical enclosures. Keys and locks become the property of the Department. c) All electrical wiring, motor, motor controls, and transformers shall meet the requirements of the National Electrical Code (NEC). d) NFHMIS assembly shall allow for opening of the fixture for lamp changing and for fixture replacement without removing the light shield. e) All junction boxes and enclosures shall be stainless steel or aluminum and shall be arranged to drain by drilling drain holes, minimum of 2 per enclosure, or other draining means approved by the Engineer. f) All wireways shall have burrs and sharp edges removed. g) Power cord shall have a hypalon jacket, cable grips with shrink tubing over the grip to hold it in place, and shall have waterproof pin and sleeve cord connectors at the pole base and twist lock connector at the fixture mounting assembly in accordance with the HMID standard sheets. h) Place a NEMA 3R stainless steel enclosure on the outside of the pole at an accessible location near the base. Enclosure shall house a 2 pole/30 amp circuit breaker. The equipment grounding conductor shall be grounded to the high mast pole at this point. Bond the enclosure and all other metal parts together. The fixture mounting assembly shall be considered grounded by mechanical connection to the pole. Luminaires for this project shall be 480 volt, supplied from a 240/480 volt service. The pole shall be grounded at the bottom of the pole only. i) Additional lightning protection grounding shall be provided by installing an air terminal at the top of the pole connected to the NFHMIS assembly stationary support and by the installation of 2 ground rods as shown on the HMIF standard sheet and by mechanical connection of the anchor bolts to the rebar cage. j) Wire rope for the winch shall be rotation resistant. All wire rope shall have a 5:1 or greater breaking strength to working load ratio. All wire rope shall be stainless steel. Wire rope shall have spring attachments to evenly distribute assembly weight. Swaged terminals, wire rope clips, thimbles, and cotter pins shall be stainless steel. k) Motor and winch combination shall be equipped with torque limiting features. The motor shall be capable of being operated from the high mast pole power either directly, or through a transformer

3 l) The NFHMIS assembly shall be equipped with rollers or a bumper ring to prevent damage between the pole and fixture mounting structure. Rollers, if used, shall be sunlight resistant. Bumper ring, if used, shall be black High Density Polyethylene (HDPE) with 2% carbon black and shall be secured by stainless steel straps. m) Fixture pre-approval and testing shall meet the requirements shown on the HMID standard sheets. Light shield shall be fabricated in accordance with the details shown on the plans. n) All ferrous metals shall be galvanized in accordance with Item 445, Galvanizing. o) The NFHMIS assembly shall have a heavy duty safety lanyard or shall mechanically lock into the raised position. p) The NFHMIS assembly shall have guide rods that stabilize the moving part of the assembly to the stationary support arms to prevent twisting by wind action when the fixture mounting structure is fully raised. Provide an indicator flag to show when the fixture mounting structure is fully raised and the stabilizer rods are engaged. q) Pulleys for wire rope shall have close tolerances so that wire rope cannot jump off of the pulley. Pulleys shall have self lubricating oil impregnated bronze bearings on stainless steel shafts. r) Pulleys for wire rope and electrical cable shall not have a radius less than the minimum bending radius requirement of the wire rope or electrical cable. s) NFHMIS assembly shall be hoisted by three wire ropes attached to a transition plate that transitions hoisting to one rotation resistant wire rope. Each wire rope shall have a swaged terminal to connect to the transition plate. All nuts on swaged terminals shall be prevented from backing off bolts or swaged terminals by stainless steel cotter pins. t) NFHMIS assembly fabricator shall have 5 yrs. experience in the fabrication of high mast illumination assemblies. u) The Contractor shall be responsible for all testing costs and engineering costs to establish wind loading and weight loading. v) Each fixture shall be equipped with the T-ELMS control system in accordance with the Special Specification, Texas Electrical and Lighting Management System (T-ELMS). w) For submitted drawings, the Contractor shall furnish 6 sets of shop drawings of the complete NFHMIS assembly in accordance with Item 441, Steel Structures, except that the drawings shall be submitted to the Director of Traffic Operations, Texas Department of Transportation, 125 East 11 th Street, Austin, Texas , unless otherwise shown on the plans. x) Prior to beginning fabrication, 2 copies of the completed material identification form shall be furnished to the Engineer in accordance with Item 441, Steel Structures

4 3. Construction Methods. Safe construction and operating practices shall be maintained at all times. Placement of anchor bolts in foundations and installation of poles shall be coordinated to place High Mast reference line parallel to the roadway centerline. The high mast illumination pole shall be installed on the foundation in such a manner so as to prevent scarring, marring, or damage to the high mast pole or NFHMIS assembly. Temporary slings shall be placed on the pole to prevent any slippage in the pole sections. Slings shall be tightened sufficiently to prevent any slippage from damaging structure. Fixtures shall be oriented as shown in the plans. Shield length and alignment is a critical feature of this item. The Contractor shall make all adjustments necessary to provide shielding as shown on the plans. The Contractor shall set the initial shield length as shown on the plans and shall make night inspections and subsequent shield adjustments to prevent light from trespassing over the right of way lines, or as approved by the Engineer. The Contractor shall meet the Construction Method requirements shown on the HMID standard sheets. After completion of the installation of the poles, the poles shall be placed in operation. Final acceptance will not be made until the poles have operated satisfactorily for a period of 14 days in accordance with Item 616, Performance Testing of Lighting Systems. The Contractor shall not be required to pay for the electrical energy consumed by the system during the trial period. New foundations shall be constructed in accordance with Item 416, Drilled Shaft Foundations, except for measure and payment. 4. Measurement. This Item will be measured as each high mast illumination pole (NF-HMIP) installed, each high mast illumination assembly (NF-HMIA) installed, and by linear foot of drill shaft foundation (NF-HMIF) installed, complete in place. 5. Payment. The work performed and materials furnished in accordance with this Item, and measured as provided under Measurement, will be paid for at the unit price bid for NF- HMIP, NF-HMIA, and NF-HMIF. This price shall be full compensation for furnishing and installing all poles, pole sections, anchor bolts, anchor bolt templates, access holes, access covers, locks, tack welding nuts, winch/pulley mounting plates, and grounding connections; for furnishing and installing all fixtures, fixture mounting structure, electrical cord and connectors, hoisting mechanism, conduits and wireways on structure, enclosures, electrical wiring and parts, wire rope cables, winches, motors, transformers, and furnishing and placing concrete drill shaft foundation rebar, grounding connections, and conductors and conduit from ground box at pole base to pole; for furnishing all other materials and equipment required for a complete installation, and for all labor, tools, equipment and incidentals necessary to complete the work. No additional compensation will be paid for modifications to drill shafts made to accommodate pole provided. No additional compensation will be paid for increased diameter, rebar, anchor bolts, concrete, labor, tools, equipment or incidentals necessary to complete the work. Additional compensation will be paid only for additional length of drilled shaft if necessary

5 Riprap will be paid for under Item 432, Riprap. Conduit used to supply power to the High Mast Illumination Assembly will be paid for under Item 618, Conduit. Conductors used to supply power to the High Mast Illumination Assembly will be paid for under Item 620, Electrical Conductors. Ground boxes will be paid for under Item 624, Ground Boxes