8-173 Section 819. Lighting
819.01 Description
This work consists of providing operating lighting units; removing, salvaging, or disposing of existing lighting components; excavating, backfilling , restoring the site; and disposing of waste excavated materials . Complete this work in accordance with this section; sections 816, 818, and 820; and the contract . For items not specified in section 816, 818, or 820 or the contract, complete the work in accordance with the requirements of the NEC and the MDLARA. Provide personnel who are qualified and experienced in perform ing the required work . Provide the on- site presence of a licensed journeyman electrician supervisor for the electrical system installation and during electrical construction. Contact the MDLARA for electrical service inspection and pay the appl icable fees.
819.02 Materials
Provide material in accordance with the following sections : Granular Material Class II ..................................................................... 902 Coarse Aggregate 17A .......................................................................... 902 Light Standard and Tower Anchor Bolts ................................................ 908 Conduit ................................................................................................. 918 Electrical Grounding System ................................................................. 918 Electrical Wire and Cable ...................................................................... 918 Direct Burial Cable ................................................................................ 918 Equipment Grounding Conductor .......................................................... 918 Handholes ............................................................................................. 918 Light Standard Foundation .................................................................... 918 Light Standard ....................................................................................... 918 Luminaires ............................................................................................ 918 Wood Poles ........................................................................................... 918 Tower Lighting Unit ............................................................................... 918 Concrete, Grade 3500 ........................................................................ 1004
819.03 Construction
A.Light Standard Foundation
1.Remove . Remove foundations in accordance with section 204.
2.Installation . Install light standard foundations as shown on the plans and the MDOT Standard Plans , as applicable. Drill foundation holes with an auger of the same diameter as the foundation. If the diameter MDOT Standard Specifications for Construction Section 819 8-174 of the auger cannot accommodate the planned foundation size, excavate the hole. Do not use construction rubble, broken sidewalk, or other deleterious material in place of concrete in the foundation. The Engineer will not accept cracked or otherwise deformed foundations. Obtain the Engineer’s approval before placing foundations . Secure steel reinforcement, raceway conduits, and anchor bolts to each other in the augured hole to prevent displacement during concrete placem ent. Position and m aintain the vertical and horizontal alignment of anchor bolt projections on top of the foundation. Space the anchor bolt on the bolt circle and parallel to the curb . Place the lower portion of the foundation without forms if the soil is stable and the hole remains open. For unstable soil conditions, subject to cave -in, use forms for the entire depth of the hole for the foundation. Install a #4 AWG bare bonding jumper as required by the NEC from steel reinforcement to pole. Form the upper 12 inches of the foundation and provide a uniform finish and a horizontal top surface. Cure the foundations 7 days before installing bases and standards or until minimum strength is achieved. Backfill with Class II granular material . The Engineer will determine whether excavated material meets the backfill requirement . If the Engineer determines that excavated material does not meet the backfill requirement, use Class II granular material.
B.Light Standa rd. Install light standards consisting of the light standard shaft and light standard arm on new foundations, bridges, retaining walls, concrete barrier walls, frangible transformer bases, or other structures . Use new or salvaged materials.
1.Submittals . Submit Test Data Certifications and structural calculations for fabricated light standard and frangible transformer bases . Light standards must be listed for use. Before installation, submit a complete set of light standard fabrication and installation shop drawings to the Engineer for approval in accordance with section 104.
2.Steel Light Standard Fabrication . Weld steel light standards in accordance with subsection 707.03.D.10.b . The Contractor may MDOT Standard Specifications for Construction Section 819 8-175 provide a shaft with one longitudinal welded joint and one transverse welded joint as shown on the plans.
a.Ensure that the welded area is free of flat spots, protuberances, cracks, discolorations, weld splatter, mill scale, and other imperfections that would mar the appearance or structural continuity of the welded area. Provide circumferential butt weld splices and base connection welds using full penetration welds, ground flush. The Contractor may make the remaining portion of the longitudinal weld a partial penetration weld of at least 60 %. Provide a base that telescopes onto the shaft . Weld the base onto the shaft with two continuous electric arc welds with one weld on the inside of the base at the end of the shaft and one weld on the outside of the shaft at the top of the base.
b.Blast clean all components prior t o galvanizing and galvanize in accordance with ASTM A123/A123M . Galvanize the bracket arm assembly separately.
3.Aluminum Light Standard Fabrication . Weld aluminum light standards in accordance with AWS D1.2. As required by the Engineer, qualify welding procedures by testing qualification welds. Use two continuous welds made by the metal inert -gas method using aluminum filler metal meeting the requirements of AWS D1.2 to secure the cast aluminum anchor base to the lower end of the shaft. Provide a base that telescopes onto the shaft . Weld the base onto the shaft with two welds with one weld on the inside of the base at the end of the shaft and one weld on the outside of the shaft at the top of the base.
4.Shipping . Provide clean shafts, free of scrat ches, dents, or similar disfiguring marks. Provide round standards with a uniform finish . Provide protection for the standards during shipping, handling, storage, and erection. Repair galvanized coating on steel light standard components damaged in transportation, handling, or erection in accordance with subsection 716.03.E and at no additional cost to the Department.
5.Light Standard Frangible Base . Provide and install or remove light standard frangible bases. MDOT Standard Specifications for Construction Section 819 8-176 a. Light Standard Frangible Base – Remove . Remove t he frangible base from the foundation. Take ownership of the removed frangible base.
b.Construction . Install frangible transformer bases on concrete foundations . Finish the top surface of the concrete foundation level to within ¼ inch over 10 feet. Mount the frangible base directly on the concrete foundation and secure to the anchor bolts in accordance with manufacturer’s specifications . Mount the frangible transformer base to the concrete foundation so the tabs project at least half the anchor bolt diameter beyond the nut . Tighten the anchor bolts to a snug condition in accordance with subsection
810.03 N.2.
Tighten bolts connecting the pole to the frangible base to a snug tight condition in accordance with subsection 707.03.E.6. d. The lock washers must be fully compressed. Do not use bolt or nut covers.
6.Equipment Ground Conductor . Provide and install equipment grounding conductors in accordance with subsection 818.03.D.
7.Light Standard Arm . Provide and install or remove light standard arms, including bracket arm assemblies.
a.Light Standard Arm – Remove . Remove light standard arms from the shaft . Take ownership of removed light standard arms.
b.Light Standard Arm – Remove and Salvage. Remove and salvage light standard arms from the shaft . Transport light standard arms and hardware to a storage location, if required, as shown on the plans or otherwise directed by the Eng ineer.
c.Light Standard Arm . Provide light standard arms on the required light standard shafts.
d.Light Standard Arm – Install . Install light standard arms, provided by the Engineer, on the required light standard shafts.
e.Light Standard Arm – Install Salvaged . Install light standard arms, salvaged in accordance with subsection 819.03. B.7.b, on the required light standard shafts. Replace parts of light standard arms damaged during disassembly, handling, or storage operations at no additional c ost to the Department.
8.Light Standard Shaft . Provide and install or remove light standard shafts . The light standard shaft includes the shaft, anchor base, MDOT Standard Specifications for Construction Section 819 8-177 associated hardware, and No. 10 wire extending from the fusing at the base of the pole to the luminaire. Install two feeder wires plus a ground wire for each luminaire . Per NEC, do not use w aterlines in street lighting standards or bases.
a.Light Standard Shaft – Remove. Remove light standard shafts from the foundations . Take ownership of removed light standard shafts.
b.Light Standard Shaft – Remove and Salvage. Remove and salvage light standard shafts from the foundations . Light standards and hardware should be stored in a secure and safe location approved by the Engineer.
c.Light Standard Shaft – Single, Double, or No Arm. Provide light standard shafts of the length required for single, double, or no arm light standards on the light standard foundations shown on the plans . If the plans show no arm light standard shafts, include the tenon at the top of the pole with the light standard shaft.
d.Light Standard Shaft – Install . Install light standard shafts provided by the Engineer on the required light standard foundations.
e.Light Standard Shaft – Install Salvaged . Install light standard shafts, salvaged in accordance with subsection 819.03. B.8.b, on the required light standard foundations. Replace parts of light standard shafts damaged during reassembly at no additional cost to the Department. Replace parts of light standard shafts damaged during disassembly, handling, or storage operations at no additional cost to the Department.
9.Installation Details . Install the light standards to a vertical position for the upper one-third of the shaft with the bracket arm and luminaire attached. Erect bracket arms at right angles to the edge of pavement . Install light standards so the handhole faces away from oncoming traffic . On barrier wall and bridge installations, install the handhole facing, and accessible from, the roadway . Tighten anchor bolts in accordance with subsection 810.03.N.2. Splice wire at access points, including handholes or access holes located on the shaft of the light standards . Loop direct burial wire up into the standards and make connecti ons at the handholes. Splice joints, insulate, and tape in accordance with the manufacturer’s specifications for the type and cable voltage class . Use lug connectors MDOT Standard Specifications for Construction Section 819 8-178 or solder with non-corrosive flux for bonding joints . Use nationally recognized and approv ed plastic tape. Provide moisture-proof joints, insulated for the required voltage. Submit to the Engineer for approval samples of pre -insulated, solderless connectors, or mechanical connectors requiring special tools. The Contractor may install luminaires with the light standards. If installing luminaires with light standards, repair interior and exterior damage caused by the Contractor before operation at no additional cost to the Department. Ground the light standards in accordance with the current NEC unless the local agency requirements exceed NEC grounding practices.
C.Luminaires . Provide and install or remove and salvage luminaires . Use new or salvaged luminaires, as shown on the plans.
1.General . Provide luminaires of the type, size, and lighting distribution pattern shown on the plans. Individually package luminaires for shipment.
2.Submittals . Provide the Engineer with a drawing showing a general diagram of the luminaire unit and the assembly and installation method. Provide a General Certification for luminaires.
3.Luminaire . Install luminaires of the size, type, and lighting distribution shown on the plans.
a.Luminaire – Remove. Remove luminaires from the shaft and arm . Take ownership of the removed luminaires.
b.Luminaire – Remove and Salvage. Remove and salvage luminaires from the shaft and arm . Transport the luminaires and hardware to a storage location, if required, as shown on the plans or otherwise directed by the Engineer.
c.Luminaire – Install Salvaged . Install luminaires salvaged in accordance with subsection 819.03. C.3.b on the light standard shaft and arm shown on the plans. Replace parts of the luminaires damaged during disassembly, handling, or storage operations at no additional cost to the Department.
4.Installation . Clean the lumi naire reflector and glassware at time of installation in accordance with the manufacturer ’s recommendations. MDOT Standard Specifications for Construction Section 819 8-179 D. Tower Lighting Unit . Construct tower lighting unit foundations in accordance with subsections 810.03.J and 810.03.K . Provide and install tower lighting units with steel shafts and base plates, head frame assemblies, luminaire mounting rings, luminaires with ballasts /drivers and lamps, lowering devices, rodent screens, and related items to mount operating tower lighti ng units on foundations.
1.Submittals . Before fabrication, submit complete tower lighting unit drawings, including welding details, to the Engineer for approval . Submit calculations for the light standard design sealed by a Professional Engineer licensed in the State of Michigan to the Engineer for approval . Include contract and job numbers. Submit a Test Data Certification covering the material used by the fabricator in the fabrication of the lighting installation. The Engineer may request tests on certified material. Submit the manufacturer ’s certification of the tower lighting unit design. Submit design calculations for the following:
a.Stress sized components of l uminaire mounting rings ;
b.Head frame assembly lowering devices ;
c.Poles at joints ; and
d.Sections through handholes and anchor bases.
2.Fabrication . Fabricate in accordance with S ection 707, except as modified by this subsection.
a.Welding. Weld in accordance with subsection 707.03.D.10.b. Use submerged arc welding for the longitudinal seam and circumferential welds . Ensure that circumferential seams are full-penetration groove welds. Use full -penetration groove welds on the longitudinal seams for the full length of the slip joint plus an additional 10 inches on both the male and female sections. Grind weld reinforcement flush on the faying surfaces in the slip joint area for the entire l ength of the full -penetration weld. Ensure that longitudinal welds other than in the slip joint area have a penetration of at least 60% . Ensure that base plate joints are full -penetration, single -bevel groove welds with reinforcing fillet welds. Provide nondestructive testing on welds as required. Ensure that the personnel performing the ultrasonic testing (UT) and magnetic MDOT Standard Specifications for Construction Section 819 8-180 particle testing (MT) are qualified as nondestructive testing ( NDT) Level II or Level III in accordance with ASNT S NT-TC-1A. The Engineer may have the opportunity to witness both MT and UT . Provide the Engineer with certified inspection reports from the ASNT inspector for tested welds.
b.Magnetic Particle Testing . Perform MT on welds in accordance with subsection 707.03.D.12, AWS D1.1, and ASTM E1444/E1444M.
c.Ultrasonic Testing . Use the shear wave or angle beam method to perform UT of 100 % of the full -penetration groove welds . Perform UT in accordance with ASTM E587 and AWS D1.1, except as modified by this subsection. Use UT to evaluate the full -penetration groove weld of the slip joints as cycli cally loaded, nontubular connections . Evaluate materials thinner than 5/16 inch in accordance with subsection
819.03 D.2.e. Before beginning inspection, establish the material
thickness and the near field of the transducer to ensure detection of relevant indications with repeatable results . Evaluate flaws at the location of the sound path beyond the firs t leg, as specified in Table 6.7 of AWS D1.1. Establish the material thickness and near field of the transducer to ensure that near field interfer ence is not a factor in the testing.
d.Equipment and Calibration . Provide pulse- echo type ultrasonic units capable of generating, receiving, and amplifying electrical impulses for the required application. Use instruments equipped with a decibel or attenuati on control . Calibrate instruments to ensure performance in the operation range. Qualify equipment as specified in Section 6.24 of AWS D1.1. Provide 70-degree angle, piezo-electric type search units (transducers) . The search unit may be composed of two separate elements or one integral unit . Before calibrating for testing, verify that the angle is within 2 degrees . Mark the exit point on the side of the transducer if different from the original exit point. Provide a search unit with a 5.0 MHz frequency and a diameter no greater than ½ inch. Calculate the near field using Formula 819-1 or Formula 819 -2. 𝑁𝑁=�𝐷𝐷2×𝐹𝐹� (4×𝑉𝑉) Formula 819-1 𝑁𝑁=𝐷𝐷2 (4𝜆𝜆) when λ=𝑉𝑉 𝐹𝐹 Formula 819-2 MDOT Standard Specifications for Construction Section 819 8-181 Where: N = near field (in ch); D = transducer diameter (inch ); F = frequency (MHz) ; V = velocity (in/sec x 106) ; and λ = wavelength (inch ). Use a suitable non- detrimental couplant . Perform calibrations using the same type of couplant as used to perform the inspection. Before beginning the calibration procedure, ensure that the operator verifies reject controls are turned off . Use of the reject controls may alter the amplitude linearity of the instrument and invalidate the test results . Calibrate the ultrasonic equipment in accordance with Section 6.24 of AWS D1.1.
e.UT Acceptance Criteria. Perform ultrasonic inspections in accordance with Section 6.13 of AWS D1.1. Perform the inspection beyond the first leg of the sound path to avoid the near field effects . If recording indications, note the leg of the sound path where the signal peaks . Calculate the sound path, or full V -path, using Formula 819-3. 𝑆𝑆𝑆𝑆(𝐹𝐹𝐹𝐹𝑆𝑆) = 2𝑇𝑇 𝐶𝐶𝐶𝐶𝐶𝐶∠ Formula 819-3 Where: SP(FVP) = sound path or full V -path (inch ); T = material thickness (in ch); and ∠ = wedge angle. The Engineer will accept or reject the weld in accordance with Table 6.3 of AWS D1.1 for 5/16-inch material thickness, except the values sh own in the table will be increased by 10 decibels to account for the thinner material tested and the modified frequency and diameter of the search unit. Prepare the surface so the transducer can be freely manipulated through the full surface area to evaluate the sound path. The Contractor may grind or use other means to clean the surface before inspection. Test in accordance with Section 6.25 of AWS D1.1. Calculate attenuation in accordance with Section 6.25.6.4 of AWS D1.1. Due to the short length of the sound path in thin materials, in most cases attenuation will not be a factor.
3.Galvanizing . Blast clean all components prior to galvanizing and galvanize in accordance with ASTM A123/A123M. MDOT Standard Specifications for Construction Section 819 8-182 4. Shipping . Repair galvanized poles and related components damaged in transportation, handling, or erect ion in accordance with subsection
716.03 E at no additional cost to the Department.
5.Installation . Submit the manufacturer’s pole assembly method and the Contractor’s assembly method to the Engineer prior to beginning the work . After raising the luminaires to the normal operating position, verify that the center of the apparent light source of each luminaire is within 2 feet of the nominal mounting height, as measured from the top of the foundation. Provide and erect the pole without field welds. Field assemble sectional poles before erecting on the foundations. During the final assembly, place the pole on aligned supports and apply force to seat each splice . Use axial or concentric compressive loading applied by hydraulic jacks, turnbuckles, or cable coffing hoists to obtain the last 3 inches of the lap. To ensure required lapping of the joint, place a temporary circumferential mark outside the lower tube. Mark the lower tube a distance of 1½ times the diameter plus 12 inches from the top. Consider the j oint tight when the bottom of the overlapping section is within 12 inches, measured equally around the pole, of the temporary mark. Erect the tower lighting unit so the horizontal offset at the top of the pole is within 4 inches of the true vertical positi on with respect to the base of the pole, and the offset at the midpoint of the pole is equal to or less than one-fourth of the offset position at the top of the pole. Install and tighten anchor bolts in accordance with subsection
810.03 N.
Provide the pole alignment method to the Engineer prior to beginning work. Install rodent screens at the base of the pole in accordance with section 909.11.
6.Field Test . After anchoring the tower shaft in place, noti fy the Engineer to arrange for MDOT personnel to witness the raising and lowering of the luminaire ring. Raise and lower the ring at least three times. Raise the ring to the working position and visually check to verify horizontal position. Energize the lamps and allow them to burn for at least 15 minutes before lowering. After lowering, inspect the ring for cable tension, levelness, hardware tightness, electrical connections, MDOT Standard Specifications for Construction Section 819 8-183 and power cord adjustments . Adjust the unit to provide the required operation of the lowering device and electrical system. If the operation of the ring requires more adjustments after the required tests, raise the ring until operational deficiencies are corrected. The Engineer will document successful completion of this field test before approving of the tower for operation.
819.04 Measurement and Payment
Pay Item Pay Unit Light Std Fdn ............................................................................................ Each Light Std Fdn, Rem ................................................................................... Each Light Std, Frangible Transformer Base ..................................................... Each Light Std, Frangible Transformer Base, Rem ............................................ Each Light Std Arm, (work) ................................................................................ Each Light Std Arm, __ foot ............................................................................... Each Light Std Shaft, (work) .............................................................................. Each Light Std Shaft, Square, __ foot ................................................................ Each Light Std Shaft, 30 foot or less .................................................................. Each Light Std Shaft, __ foot to __ foot ............................................................. Each Light Std Shaft, 30 foot or less, Single Arm .............................................. Each Light Std Shaft, __ foot to __ foot, Single Arm .......................................... Each Light Std Shaft, 30 foot or less, Double Arm ............................................. Each Light Std Shaft, __ foot to __ foot, Double Arm ......................................... Each Luminaire .................................................................................................. Each Luminaire, (work) ...................................................................................... Each Luminaire, (watt) LED ................................................................................ Each Luminaire, (watt) LED, Spec ...................................................................... Each Luminaire, (watt) LED, Rectangular ........................................................... Each Tower Ltg Unit , __ foot (Number) Luminaire ............................................. Each Tower Ltg Unit, Fdn Cased ........................................................................ Foot Tower Ltg Unit, Fdn Uncased .................................................................... Foot Unless otherwise required, the unit prices for the pay items listed in this subsection include the cost of excavation, granular material, backfill , and disposal of waste excavated material . Restoring the site in kind in accordance with section 816 will be paid for separately.
A.Light Standard Foundation . The unit price for Light Std Fdn includes the cost of installing the anchor bolts , conduit, hardware, and other appurtenances required. The unit price for Light Std Fdn, Rem includes the cost of removing and disposing of foundations. MDOT Standard Specifications for Construction Section 819 8-184 B. Light Standard Arm . The unit price for Light Std Arm of the size required includes the cost of removing, installing, or salvaging light standard arms.
1.Light Standard Shaft . The unit price for light standard shaft pay items includes the cost of furnishing the light standard anchor bolt assembly , installing the light standard shaft on the foundation or frangible transformer base , and providing street lighting circuit cable cutting and splicing.
2.Luminaire . The unit price for Luminaire includes the cost of the following:
a.Luminaire;
b.Lamp;
c.Wirin g;
d.Other material ; and
e.Providing connections for making luminaire operational. The unit price for Luminaire (watt) includes the cost of providing and installing the complete luminaire, including the drivers or ballasts, lamps, and associated hardware and wiring.
C.Tower Lighting . The unit price for Tower Ltg Unit, __ foot, __ Luminaire includes the cost of the following:
1.Erection ;
2.Aligning plumb ;
3.Anchoring to the foundation;
4.Electrically wiring for operation; and
5.Testing of the unit. The Engineer will measure Tower Ltg Unit, Fdn Cased and Tower Ltg Unit, Fdn Uncased vertically from the bottom to the top of the shaft . The unit prices for Tower Ltg Unit, Fdn Cased and Tower Ltg Unit, Fdn Uncased include the cost of providing and installing the anchor bolts , conduit, casing, hardware, and other appurtenances required.
Source: Michigan Standard Specifications for Construction, 2020 Edition. Pages 734–745 of 1,146.