- 204 - SECTION 408 -- POLES AND TOWERS
408.01 Description
1.The word "pole," when used in this Section, shall be taken to mean a lighting standard 50 feet or less in mounting height. Units with mounting heights greater than 50 feet will be referre d to as "towers." Poles and towers have many different configurations. T he type to be provided shall be as shown in the contract and describ ed in the special provisions.
2.General pole and tower requirements:
a.New Pole and Tower Installation:
1.The Contractor shall furnish and install poles and towers of the size and type shown in the contract. Each traffic signal pole, lighting pole and tower, complete with all of its components, shall be designed according to the latest edition of the AASHTO, “Standard Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals”.
2.Light poles and traffic signal poles, unless shown or stated otherwise, shall be furnis hed complete with pole shaft, base plate, mast arm(s), grommets, end caps, handhole with cover and watertight gasket, anchor bolts with nuts, nut covers, ground rods and wire, luminaires, foundation, breakaway device (if requir ed), in-line fuses and fuse holders, wire and cable in the pole and mast arms, and all excavation, backfilling, compaction, labor, tools, equipment, and incidentals necessary to complete the work.
3.High mast towers, unless shown or stated otherwise, shall be furnished complete with tower shaft, base plate, handhole with cover and watertight gasket, anchor bolts with nuts, ground rod(s) and wire, high mast lowering system powered by an internal motor, electrical wires and cables, winch cable(s), hoisting cables, foundat ions, and all other items required to provide a complete and workable unit.
4.All items associated with a lighting unit of either type must be compatible and work together to provide a reliable and efficient unit.
b.Pole and Tower Relocations:
1.The Contractor shall relocate poles and towers as shown in the contract. Poles shall be carefully dismantled and all items stored and protected from damage until installed at their new locations. Towers shall be carefully lowered and stored on timber cribbing with the shaft in essentially straight alignment with no part of t he unit in contact with the ground. The tower and its components shall be prot ected from damage until installed at their new location. The Engineer will des ignate specific areas for temporary storage of the material.
2.Pole and tower relocations shall consist of removing the pole or tower with all associated item s from its foundation and reinstalling the pole or tower on a new foundation at a new location. The Contractor shall remove the pole or tower foundat ion, including steel and anchor bolts, to a minimum depth of 2 ft (600 mm) below finish grade. The relocation shall include all necessary excavation, backfilling, removal of debris, compaction, labor, tools, equipment, and incidental s necessary to complete the work. Constructing a new concrete foundation, if required, is a part of this work. Poles and Towers 408.03 - 205 - 408.02 -- Material Requirements
1.Pole and tower materials shall conform to the requirements of Section 1073 and to the requir ements shown in the contract.
2.All poles and towers shall be designed by a Professional Engineer licensed to practice in the State of Nebraska. The Contractor shall submit 2 sets of design comps stamped by a licensed Professional Engineer. The Contractor shall submit shop drawi ngs stamped by a licensed Professional Engineer.
3.The Contractor shall furnish all material for a complete pole or tower installation.
4.The entire assembly shall meet a ll applicable local, county, state, and national codes.
5.Department-Furnished Material: a. Department-furnished materi al and the locations where they are to be picked up are shown in the contract.
b.The Contractor shall furnish all other items required for a complete inst allation.
c.The Contractor will contac t the Engineer to determine when and where to pick up the State-furnished material. The Engineer will supply the Contractor with a completed "Stock Requisition." The Contractor will not be issued materials without a properly completed stock requisition.
408.03 Construction Methods
1.The Contractor shall assemble and install poles and towers in accordance with the manufacturer's instru ctions, plan details, or as directed by the Engineer.
2.Setting Poles:
a.All poles shall stand plumb under the dead load. If shimming is required, all shims shall be placed betw een the top of the foundation and the bottom of the transformer base (bottom of the pole base if no breakaway device is being used). Only regular "U" shaped shim stock shall be used and installed with the back edge of the shim flush with the bottom edge of transformer base or bottom edge of the pole base.
b.If concrete foundations are being used, the foundation shall be dressed to provide for proper seating and leveling. Traffic signal poles shall be placed on leveling nuts. The leveling nuts shall not be more than one bolt diameter above the foundation.
c.Each pole shall be grounded to a ground rod and to the system grounding conductor.
d.Breakaway devices shall be installed in strict compliance with the manufacturer's deta ils and instructions.
3.Setting Towers: a. All towers shall be plumbed and supported by anchor bolts and nuts. The tower shall not rest on the concrete.
b.The space between the top of the concrete foundation and the bottom of the tower base shall be no gr eater than 2 anchor bolt diameters.
408.03 Poles and Towers
- 206 - c. Each tower shall be grounded to a ground rod and to the system grounding conductor.
4.Mast arm signal and combinat ion mast arm signal/lighting poles shall be leveled by the use of nuts and anchor bolts supplied with the pole. Before the pole is loaded, it shall be raked back in excess of the calculated deflection and plumbed after the loads are applied by adjusting the leveling nuts.
5.Relocating poles and towers: a. Poles and towers being relocated shall be installed at their new locations and connected electrically as shown in the contract.
b.Existing luminaires or traffic signals being reinstalled on relocated poles shall be cleaned and provided with new lamps or LED’s.
c.Relocated towers shall have their luminaires cleaned and new lamps installed.
d.The Contractor shall install new wires with in-line fuses and fuse holders in the relocated pole sh aft and new wires in the mast arm.
e.Missing or damaged components shall be replaced by the Contractor. The replacement parts will be paid for as extra work.
6.Foundation dimensions and materials shall be as indicated in the contract. Anchor bolts shall be of the correct size and spacing for the pole(s) being furnished.
7.The cables exiting the pole shaft or mast arm shall have adequate drip loops. The wiring for the luminaires shall be installed with 40 inches (1
m.of cable extending beyond the end of the mast arm.
8.Poles or other lighting items bei ng returned to the State must be disassembled, clean and free of internal wiring. Handhole covers shall be in place, and mast arm bolts shall be attached. The Contractor will not be allowed to "off-load" any items not cleaned or prepared.
408.04 Method of Measurement
1.Installation and relocation of the various types and sizes of poles, towers, lighting units, traffic signal structures, and ITS device structures are measured by the each. Poles and Towers 408.05 - 207 - 408.05 -- Basis of Payment
1.Pay Item Pay Unit Mast Arm Signal Pole, Type MP _____ Each (ea) Combination Mast Arm Signal and Each (ea) Lighting Pole, Type CMP _____ Span Wire Signal Pole, Type SWP _____ Each (ea) Combination Span Wire Signal and Each (ea) Lighting Pole, Type SWP _____ Pedestal Pole, Type PP _____ Each (ea) Signal Structure, Type _____ Each (ea) Street Lighting Unit, Type SL ____ Each (ea) High Mast Lighting Unit, Type T _____ Each (ea) Install Mast Arm Signal Pole, Type MP_____ Each (ea) Install _______ Each (ea) Install Combination Mast Arm Signal Each (ea) and Lighting Pole, Type CMP _____ Install Span Wire Signal Pole, Type SWP _____ Each (ea) Install Combination Span Wire Signal Each (ea) and Lighting Pole, Type SWP _____ Install Pedestal Pole, Type PP _____ Each (ea) Install Street Lighting Unit, Each (ea) T y p e S L _ _ _ _ _ Relocate High Mast Lighting Each (ea) Unit, Type T _____ Install High Mast Lighting Unit, Type T _____ Each (ea) R e l o c a t e _ _ _ _ _ E a c h ( e a ) Relocate Street Lighting Unit, Type _____ Each (ea) Install Temporary Lighting Unit, Type _____ Each (ea) 2. Separate payment for pole and to wer foundations, if provided, is as described in Section 407.
3.Foundation anchor bolts are s ubsidiary to the pole and/or tower except for relocated pole and tower foundations.
4.Payment is full compensation for all work described in this Section. - 208 - SECTION 409 -- SIGNAL HEADS
409.01 Description
1.Traffic Signals and Pedestrian Signals:
a.The Contractor shall furnish and install signal heads of the type and size shown in the contract. This work shall include furnishing and installing the signal head, lamps, mounting bracket, and backplate (if required). Pole mounted signals do not require backplates.
2.LED Traffic Signal Modules:
a.The contractor shall furn ish and install LED traffic signal modules of the type and size shown in the contract. This work shall include removing the incandescent lamp, lamp socket, reflector, and lens from an existing signal head and then retrofitting the signal head with a LED module.
409.02 Material Requirements
1.Traffic and pedestrian signal heads shall be in conformance with Section 1073.
2.Optically programmed signal heads shall be on the Department’s Approved Products List.
3.LED traffic signal modules shall be on the Department’s Approved Products List.
409.03 Construction Methods
1.The Contractor shall install si gnals plumb, level, and securely attached with all fittings, so they present a neat appearance.
2.If required, the Contractor shall furnish pipe nipples in appropriate lengths so that all signals on one span will hang at the same elevation.
3.If, after the signal assemblies are erected and t he road is open to public travel, the signal system is no t put immediately into operation, the signal faces shall be covered with burlap or other opaque material subject to the approval of the Engineer. Inoperat ive signals on roads open to the public shall always be covered. Tilting the signals upward is not an acceptable alternative to covering the heads.
409.04 Method of Measurement
1.Signal heads shall be measured by the each.
409.05 Basis of Payment
1.Pay Item Pay Unit Traffic Signal, Type TS _____ Each (ea) Pedestrian Signal, Type PS _____ Each (ea) Install Traffic Signal, Type TS _____ Each (ea) Install Pedestrian Signal, Type PS _____ Each (ea) LED Traffic Signal Module, Type _____ Each (ea) LED Pedestrian Signal Module, Type _____ Each (ea) Install LED Traffic Signal Module, Type _____ Each (ea)
2.Payment is full compensation for all work described in this Section.
Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 238–241 of 1,048.