Pole Foundation Art. 836.03
835.05 Basis of Payment. This work will be paid for at the contract unit price
per each for LIGHT TOWER, of the mounting heights, luminaire mounting positions, and finish specified. The concrete foundation and luminaires will be paid for according to Sections 837 and 821, respectively. FOUNDATIONS AND BREAKAWAY DEVICES SECTION 836. POLE FOUNDATION
836.01 Description. This work shall consist of constructing or furnishing and
installing a light pole foundation.
836.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Portland Cement Concrete ..................................................................... 1020
b.Anchor Rods ...................................................................................... 1070.02
c.Light Pole Foundation, Metal ............................................................. 1070.01
d.Fine Aggregate .................................................................................. 1003.04 CONSTRUCTION REQUIREMENTS
836.03 Installation. Foundations installed within the clear zone (unless
behind guardrail) shall not protrude more than 4 in. (100 mm) above the finished grade within a 5 ft (1.5 m) chord across the foundation, with anchor rods and breakaway device included. If foundation heights, including anchor rods and fractured breakaway device extend beyond these specified limits, the foundation shall be replaced.
a.Drilled Shaft Foundations. Drilled shaft foundations shall be constructed according to Section 516 and the following. The submittal requirements as stated in Article 516.04 shall not apply and the entire length of the drilled shaft shall be vibrated. Grounding electrodes shall be according to Section 806. The raceway and full length anchor rods shall be properly positioned and secured in the augered hole prior to placing the concrete. The bend radius of the anchor rods shall be at least four times the rod diameter. The wiring window shall be perpendicular to the roadway. After installation of cable, voids within the wiring window shall be filled with fine aggregate. The top of the foundation shall be constructed level. A liner or form shall be used to produce a uniform smooth side to the top of the foundation. The depth of the form shall be as shown on the plans. Art. 836.03 Pole Foundation The foundation form shall remain undisturbed for at least 24 hours after the concrete has been poured. Concrete shall be cured before poles are installed. When obstructions are encountered, the Contractor shall request to relocate the foundation. Any abandoned holes shall be backfilled to the satisfaction of the Engineer. When rock is encountered, the foundation depth may be reduced 6 in. (150 mm) for every 12 in. (300 mm) of embedment in rock. The minimum depth of any foundation shall be 4.5 ft (1.4 m). When the foundation depth is reduced to less than specified, the anchor rods shall be cut, threaded, and a steel plate of the diameter shown on the plans shall be installed on the bottom of the anchor rods 6 in. (150 mm) above the bottom of the excavated hole with 1 in. (25 mm) nuts.
b.Metal Foundations. The metal foundation shall be installed with its axis plumb. The light pole shall be installed plumb without the use of shims, grout, or other leveling devices. Any voids within the metal screw-in foundation shall be filled with fine aggregate. Wiring windows shall be oriented to be parallel to the roadway unless otherwise directed by the Engineer to achieve alignment with grade or to minimize bends in the feeder wiring into the foundation. The Contractor shall use a torque indicating device to install metal foundations. A shear pin indicator or other Engineer approved method shall be used to ensure the foundation is installed properly. A metal foundation shall not be installed to a torque which exceeds the manufacturer’s maximum torque rating nor shall it be installed to an installation torque value of less than 3,500 ft lb (5,000 N m). Metal foundations that are not installed to full installation depth or do not achieve the minimum installation torque shall be removed and replaced with a concrete foundation at no additional cost to the Department. Driven grounding electrodes will not be required when metal foundations are specified.
836.04 Method of Measurement. Concrete foundations will be measured for
payment in feet (meters) in place. The length measured will be limited to that shown on the plans or authorized by the Engineer. Any offsets in the foundation will be measured along the vertical and horizontal centerlines of the foundation without overlap. Relocation of a foundation due to an obstruction and any shaft excavation to that point will not be measured for payment. Light Tower Foundation Art. 837.03 Excavation in rock will be measured for payment according to Article 502.12.
836.05 Basis of Payment. Concrete foundations will be paid for at the
contract unit price per foot (meter) for LIGHT POLE FOUNDATION, of the diameter specified. Metal foundations will be paid for at the contract unit price per each for LIGHT POLE FOUNDATION, METAL, of the bolt circle, diameter, and length specified. Excavation in rock will be paid for according to Article 502.13. SECTION 837. LIGHT TOWER FOUNDATION
837.01 Description. This work shall consist of constructing a drilled shaft
foundation for a light tower.
837.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Portland Cement Concrete (Note 1) ....................................................... 1020
b.Light Tower Anchor Rod Assembly .................................................... 1070.03
c.Fine Aggregate .................................................................................. 1003.04
d.Reinforcement Bars ....................................................................... 1006.10(a) Note 1. Class SI concrete shall be used for the concrete work pad and shall be cured according to Article 1020.13 under other incidental concrete. CONSTRUCTION REQUIREMENTS
837.03 Installation. Drilled shaft foundations shall be constructed according
to Section 516 and the following. When obstructions are encountered, the Contractor shall request to relocate the foundation. Any abandoned holes shall be backfilled to the satisfaction of the Engineer. Grounding electrodes shall be according to Section 806. The anchor rod assembly may be factory fabricated with the reinforcing cage or it may be field assembled. The cage shall be hand tied, no tack welding will be allowed. Anchor rods shall sufficiently overlap with the rebar cage to develop their full holding strength. Full length anchor rods shall not be used unless approved by the Engineer. The top of the foundation to 18 in. (450 mm) below grade shall be formed. The reinforcing cage, anchor rods, and wireway shall be accurately held in place by the form. The anchor rods shall be held plumb above the top of the foundation during concrete placement.
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Source: Illinois Standard Specifications for Road and Bridge Construction, 2022 Edition. Pages 726–728 of 1,217. View official source ↗