- 202 - SECTION 407 -- POLE AND TOWER FOUNDATIONS
407.01 Description
1.Concrete Foundations (Conventional and High Mast, Traffic Signal, and ITS devices):
a.Concrete foundations for poles and towers shall be of the size and type shown in the contract. Foundations shall include a ground rods, reinforcing steel, anchor bolts, conduit entrance bends, and a spare conduit bend.
b.If the foundation details are not shown in the contract, the Contractor shall obtain the necessary soil data, design the foundation according to the soil test data, and construct the foundation. Two copies each of the soil test data and foundation design must be submitted to the Engineer two weeks before construction of the foundation will be allowed to begin.
c.The concrete foundation must be designed by a Professional Engineer registered in Nebraska. The Professional Engineer must stamp and sign all design documents.
2.Power Installed Foundations: Power installed pole foundations may only be used when specified in the contract. Power installed foundations shall be of the size and type shown in the contract.
407.02 Material Requirements
1.Materials for use in concrete foundations shall conform to the requirements of Sections 1002 and 1020.
2.Anchor bolts shall conform to the requirements in Section 1073.
407.03 Construction Methods
1.Staking:
a.The Engineer will stake the locations of all pole and tower foundations. Before constructing a foun dation, it will be the Contractor's responsibility to verify that the staked location will not place the finished pole or tower in an overhead or underground conflict situation.
b.Any locations or elevations that appear unreasonable or in conflict with specifications should be br ought to the attention of the Engineer. The Engineer will review and decide any changes in location or elevation.
2.Conventional Light Poles: The C ontractor shall construct the size and type of foundations sh own in the contract.
3.High Mast Towers, Traffic Signal Poles, and ITS devices: The Contractor shall construct foundations according to the design details shown in the contract or to those the C ontractor has been required to furnish.
4.Concrete foundations for both pole and tower installations shall be constructed according to the following:
a.All foundation excavations shall be free of loose dirt.
b.All concrete shall be Class 47B-3000 (47B-20). c. The anchor bolt pattern sha ll be centered in the foundation. Pole and Tower Foundations 407.05 - 203 - d. The Contractor shall perf orm all excavations, backfilling, and placing of reinforcing steel and concrete in accordance with Sections 702, 704, and 707.
5.Power Installed Foundations: a. The Contractor shall furnish and install power installed foundations in accordance with the manu facturer's instructions and details shown.
b.Foundations shall be installed before trenching for conduit or direct buried wire or cable.
6.The Contractor shall backfill a nd compact around the foundation to the optimal stiffness as defined by a deflection target value established by the Engineer and an optimal moisture as determined by NDOT T 99.
407.04 Method of Measurement
1.If the pole or tower foundation design is shown in the contract:
a.No measurements are necessary.
b.The foundation is subsidiary to the new or relocated pole or tower.
c.Ground rods, conduit entrance bends, and a spare conduit bend (if required) are subsidiary to the tower or pole.
2.If the pole or tower foundation des ign is not shown in the contract:
a.The pole or tower foundation design is measured by the each per structure.
b.The pole or tower foundation concrete is measured by the cubic yard (cubic meter).
c.The pole or tower foundation reinforcing steel is measured by the pound (kilogram).
d.The pole or tower foundation anchor bolts are measured by the each.
e.Ground rods, conduit entrance bends, and a spare conduit bend (if required) are subsidiary to the tower or pole.
407.05 Basis of Payment
1.Pay Item Pay Unit Foundation Design Each (ea) Concrete for Foundation Cubic Yard (CY) [Cubic Meter (m 3)] Reinforcing Steel Pound (lb) [Kilogram (Kg)] Anchor Bolts Each (ea)
2.All labor, equipment, excavation, and incidentals necessary to complete the foundation according to plan are subsidiary.
3.Payment is full compensation for all work described in this Section. - 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.
Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 236–237 of 1,048.