14-24 Payment will be made under:
Pay Item Pay Unit Underpass Luminaires , Type ____ Each Underpass Circuitry at ____ Lump Sum 1413 -1 DESCRIPTION Furnish, operate and maintain everything necessary to provide lighting for compliance with
Article 105 — 14 requirement for artificial lighting.
1413 -2 MATERIALS Furnish all lig hting equipment as required and r emove after the work is completed. Material and/or equipment is not required to be new but shall be in good operating condition and in compliance with applicable safety and design codes. Submit, for review and approval , catalog cuts giving the specific brand names, model numbers and ratings of the lighting equipment. Include in the submittals power ratings and photometric data. Do not begin night work without approval of the equipment and/or materials. 1413 -3 TOWER LIGHT Use tower lights which consist of mercury vapor, metal halide, high pressure sodium , low pressure sodium or light emitting diode (with correlated color temperature of 4000 Kelvin or less) fixtures mounted on a tower approximately 30 f eet in height. Use tower light fixtures which are heavy duty flood, area, or roadway style with wide beam spread, have suffic ient output to provide minimum illumination requirements for the Category of work, are weatherproof and supplied with attached waterproof power cord and plug. Use a sturdy tower which is freestanding without the aid of guy wires or bracing. Provide suffi cient capacity in the power supply to operate the light(s) and locate it for the shortest safe routing of cables to the fixtures. A tower light consisting of the combined fixture(s), tower and power supply is preferred. Provide tower lights of sufficient wattage or quantity to provide the minimum average maintained horizontal illuminance over the work area based on the Category of work as shown in Table 1413- 1. For any work not covered in Table 1413- 1, provide a minimum average maintained horizontal illumi nance of 20.0 footcandles over the work area.
14-25 Table 1413 -1
MINIMUM ILLUMINATION REQUIREMENTS FOR PORTABLE CONSTRUCTION LIGHTING Category Description of Task Minimum Average Maintained Horizontal Illumination I Excavation; Embankment, Fill and Compaction; Maintenance of Embankment; Asphalt Pavement Rolling; Subgrade, Stabilization and Construction; Base Course Rolling; Sweeping and Cleaning; Landscaping, Sod and Seeding; Reworking Shoulders. 5.0 footcandle II Barrier Wall and Traffic Separators; Milling, Removal of Pavement; Asphalt Paving and Resurfacing; Concrete Pavement; Base Course Grading and Shaping; Surface Treatment; Waterproofing and Sealing; Sidewalk Construction; Guardrails and Fencing; Striping and Pavement Marking; Highwa y Signs; Bridge Decks; Drainage Structures and Drainage Piping; Other Concrete Structures; Repair of Concrete Pavement; Pothole Filling; Repair of Guardrail and Fencing. 10.0 footcandle III Traffic Signals; Highway Lighting Systems; Crack Filling. 20.0 footcandle Aim and position the lights to illuminate the area for construction work. Make sure that there is not any disabling glare to the motorist. In no case should the main beam of the light be aimed higher than 60° above straight down. The lights should be set as far from traffic as practical and aimed in the direction of, or normal to, the traffic flow. 1413 -4 MACHINE LIGHTS Use machine lights which have mercury vapor, metal halide, high pressure sodium , low pressure sodium or light emitting diode (with corelated color temperature of 4000 Kelvin or less) fixtures mounted on supports attached to the construction machine at a height of approximately 13 f eet. Use a power supply with sufficient capacity to operate the light(s) and securely mount on the machine. Perform electrical grounding of generators to frames of machines on which they are mounted in conformance with the NEC. Use machine light fixtures with sufficient wattage and/or quantity to provide an average maintained horizontal illuminance greater than 10 footcandles on the machine and the surrounding work area. Machine lights are in addition to conventional automotive type headlights which are necessary f or maneuverability. Balloon lights are an acceptable alternate luminaire for machine lights. 1413 -5 CONSTRUCTION METHODS Use tower lights when the night work is confined to a f airly small area and is essentially a stationary operation. Space tower lights no closer than 100 f eet apart and no further than 300 feet apart. Submit photometric calculations showing the minimum average maintained horizontal illuminance over the work area and the tower spacing to the Engineer for review and approval prior to installation. Use machine lights when the night work is not confined to a small area and is essentially a continuous moving construction operation. A continuous moving constr uction operation is one that is either moving at 3 MPH, or greater, or is not occupying a 1,000 foot section of road for more than 10 minutes.
14-26 Tower lights may be provided instead of machine lights upon approval by the Engineer. Use
of tower lights inste ad of machine lights will be considered when the number of machines, type of work, or need for inspection justify their use as decided by the Engineer. Illuminate the work area where traffic control devices are being set up or repositioned at night. Where night time flagging operations are required, all flagging stations shall be illuminated to a minimum of 5 footcandles. The work areas to be illuminated are the areas where construction equipment and labor are in operation and may be different from the work areas shown in the plans. Illuminate a large enough work area so that the movements of all personnel and equipment engaged in the work will be contained in the area. Provide sufficient fuel, spare lamps, generators and personnel qualified to operate the l ights to assure that they will be maintained in operation during night work. Existing streetlights do not eliminate the requirement for the Contractor to provide lighting. Consideration may be given to the amount of illumination provided by existing light s in determining the wattage and/or quantity of lights to be provided. 1413 -6 MEASUREMENT AND PAYMENT Portable Lighting provided by tower and machine lights will be paid only w hen a significant amount of nighttime work is explicitly required and a pay item for portable lighting has been included in the contract. Otherwise, portable construction lighting will be incidental to other contract items and no direct payment will be ma de. The aggregate amount to be paid on each partial payment estimate will be equal to the percentage that the item of Portable Lighting is complete as estimated by the Engineer. Payment will be made under: Pay Item Pay Unit Portable Lighting Lump Sum