680Portable Construction Lighting

680.01 Description. Whenever the Contractor's operations are being conducted at night,

the Contractor shall provide artificial lighting as may be necessary to provide for safe and proper construction and inspection of the work . This work shall consist of furnishing, installing, maintaining, moving and removing lighting for nighttime work operations.

680.02 Materials. All lighting equipment will be furnished as required and retained by

the Contractor after the work is completed. Material and/or equipment are not required to be new but shall be in good operating condition and in compliance with applicable safety and design codes. Prior to beginning nighttime operations, the Contractor shall submit a lighting plan showing the type and location of lights proposed for use during night work. It shall clearly show the location of all lights necessary for ever y aspect of work to be done at night. In addition to the lighting plan, the Contractor shall submit catalog cuts giving the specific brand names, model numbers and ratings of the lighting equipment. The lighting plan shall include power ratings, photometric data, and lighting calculations confirming that the illumination requirements will be met by the layout. Night work shall not begin until the Contractor has submitted the above mentioned lighting plan meeting the requirements set forth in this specification. The Contractor shall take lighting level measur ements in the presence of the Engineer at locations designated by the Engineer to verify compliance with the lighting plan and the specifications. Field light level measurements shall be equal to or exceed required light levels.

680.02.1 Tower Lights. Tower lights shall consist of lighting fixtures mounted on a

tower up to thirty (30) feet in height. The tower light fixtures shall be heavy duty flood, area, or roadway style with wide beam spread. The tower shall be sturdy and free-standing without the aid of guy wires or bracing. Th e power supply shall be of sufficient capacity to operate the light(s) and shall be located for the shortest safe routing of cables to the fixtures. Tower lights shall be of sufficient wattage and/or quantity to provide an average maintained horizontal luminance in accordance with Subsection 680.02.3.

680.02.2 Machine Lights. All moving equipment used during night time operations shall

have a balloon lighting system or equivalent system and a flashing amber light on the equipment. In lieu of a flashing amber light, the Contractor may install four square feet of approved reflective material on the equipment in a location that will be seen by the traveling public. This lighting system shall illuminate the work area in each direction of travel of the equipment. Work area shall be defined as 30 feet in front and 30 feet behind moving equipment. Machine lights shall be heavy duty flood, area, or roadway style with wide beam spread mounted on supports attached to the construction machine at a height of no more than thirteen (13) feet. The power supply shall be of sufficient capacity to operate the light(s) and shall be securely mounted on the machine. Electrical grounding of generators to frames of machines on which they are mounted shall be done in conformance with the National Electrical Code (NEC). The light fixtures shall be of sufficient wattage and/or quantity to provide an average maintained horizontal luminance in accordance with Subsection 680.02.3. Machine lights are in addition to conventional automotive type head lights, which are necessary for maneuverability.

680.02.3 Lighting Levels. The submitted lighting plan shall indicate how the Contractor

intends to accomplish the lighting of the work area(s). Work areas shall be classified into one (1) of the following categories depending on the type of work to be accomplished: CATEGORY I - Category I work areas will be lit to five foot-candles (5 fc). This category of work includes general work zone safety and visual tasks with large objects. CATEGORY II - Category II work areas will be lit to ten foot-candles (10 fc). This category of work includes work around all co nstruction equipment and visual tasks that require greater accuracy such as inspection of paving and resurfacing activities. CATEGORY III - Category III work areas will be lit to twenty foot-candles (20 fc). This category of work includes activities that require the highest visual efficiency. These tasks present higher levels of visual difficulty and require significant attention from the observer, such as crack and pothole filling, joint sealing, critical connection and maintenance involving electrical connections and moving mechanical parts. Lighting equipment shall be placed so the uniformity ratio, average maintained to minimum, shall not be greater than 10:1.

680.03 Construction Requirements.

680.03.1 Lighting Systems. Tower lights may be used when the night work is confined

to a fairly small area and is essentially a stationary operation. A balloon lighting system or equivalent system shall be used when the night work is not confined to a small area and is essentially a continuous moving construction operation. Use of tower lights in lieu of balloon lights will be considered when the number of machines, type of work, or need for inspection justify their use as decided by the Engineer. The work area where traffic control devices are being set up or repositioned at night shall be illuminated. If night work requires the use of a flagger, then the flagger must be illuminated by balloon lighting or equivalent system providing ten foot-candles (10 fc). The illuminated work area shall be large enough so that the movements of all personnel and equipment engaged in the work will be contained in the area. The Contractor shall provide sufficient fuel , spare lamps, generators, and personnel qualified to operate the lights to assure that they will be maintained in operation during night work. Existing roadway lights shall not eliminate the requirement for the Contractor to provide

Portable Construction Lighting in other states

• North Carolina 1413 · PORTABLE CONSTRUCTION LIGHTING