726PORTABLE CONCRETE SAFETY BARRIERS

622

PORTABLE CONCRETE SAFETY BARRIERS AND IMPACT ATTENUATORS

726.01Description

This Section shall cover the work of furnishing and installing a portable concrete safety barrier and impact attenuators at the locations shown on the plans, designated in the proposal or directed, along with the satisfactory removal thereof, if so directed. This Section shall also cover the work of picking up State furnished portable concrete barrier units at a designated State storage yard, their installation at the designated location shown on the plans, and the returning of the units to the State storage yard. Portable Safety Barriers shall be classified as to "Type" which will designate the size, shape, height, etc., all in accordance with details shown in the plans. Unless specified otherwise, the type shall be optional, but once a type is selected it shall be used throughout the contract, unless otherwise approved by the Engineer. Portable Impact Attenuators shall be in accordance with details shown in the plans.

726.02Materials

All materials furnished for use shall conform to the appropriate requirements of Division 800, Materials, the details shown on the plans and the following:

the requirements given in Section 831.

A concrete given in Section 501.

726.03Construction Requirements

The Construction of barrier units shall be in accordance with the appropriate provisions of Section 501, unless otherwise noted on the plans or directed. The finished concrete shall be within reasonably close conformity to the lines, grades and dimensions shown on the plans or directed. The barrier unit shall present a smooth uniform appearance free of objectionable cavities or projections. Where a 10 foot {3 m} straightedge is placed horizontally on the exposed faces of the unit, the surface shall not vary more than 0.02 feet {6 mm} from the edge of the straightedge. The exposed concrete surfaces shall be finished in accordance with the requirements given in Portable Impact Attenuators shall be constructed in accordance with plan details. The Contractor shall inspect the attenuators for damage periodically (at least weekly), and immediately after a known impact. The Contractor shall notify the Engineer of the results of the inspection in writing immediately after every inspection. Damaged attenuators shall immediately be repaired or replaced in accordance with the manufacturer's recommendations.

The Contractor shall be responsible for the proper handling, transporting and installation of the barrier units and impact attenuators, complete in place, at the designated locations. Unless otherwise approved by the Engineer, the units shall be lifted and supported at the points shown on the plans or directed. Damage to any unit caused by improper handling, transporting or installation on the part of the Contractor shall be cause for the Engineer to order it to be repaired or replaced at no additional cost to the State.

726.04Method of Measurement

The Portable Concrete Safety Barriers of the type designated will be measured in linear feet {meters} to the nearest 0.1 feet {0.1 m} along the top surface of the barrier. The Portable Impact Attenuators will be measured per each in accordance with the plan details for one complete attenuator and its accessories. State Furnished Portable Impact Attenuators will be measured per each. TRUCK MOUNTED IMPACT ATTENUATOR 623

726.05Basis of Payment

The ordered and accepted Portable Concrete Safety Barrier of the designated type, measured as noted above, will be paid for at the contract unit price bid which shall be full compensation for the fabrication and furnishing of the complete barrier unit and its exclusive use for the duration of the contract, all handling, hauling, installation, relocation, maintenance, removal and satisfactory disposal of the units when deemed of no further use on the project by the Engineer includes all tools, equipment, labor and incidentals necessary to complete the work.

The ordered and accepted Portable Concrete Safety Barrier of the designated type, measured as noted above, will be paid for at the contract unit price bid which shall be full compensation for the fabrication and furnishing of the complete barrier unit and its exclusive use for the duration of the contract, all handling, hauling, installation, relocation, maintenance, and when deemed of no further use on the project by the Engineer, the removal, repair, if necessary, and delivery of the units to the Department's local storage yard and includes all materials, tools, equipment, labor and incidentals necessary to complete the work.

The ordered and accepted State Furnished Portable Safety Barrier units, measured as noted above, shall be paid for at the contract unit price bid which shall be full compensation for the pick-up of barrier units from Departmental storage sites, all handling, hauling, installation, relocation, maintenance, and when deemed of no further use on the project by the Engineer, the satisfactory removal and delivery of the units to the Department's local storage yard, including all materials, tools, equipment, labor and incidentals necessary to complete the work.

The ordered and accepted Portable Impact Attenuators of the designated design, measured as noted above, will be paid for at the contract unit price bid which shall be full compensation for the fabrication and furnishing of the complete impact attenuator unit and its exclusive use for the duration of the contract, all handling, hauling, installation, relocation, maintenance, removal and satisfactory disposal of the units when deemed of no further use on the project by the Engineer and includes all tools, equipment, labor and incidentals necessary to complete the work.

The ordered and accepted State Furnished Portable Impact Attenuators, measured as noted above, shall be paid for at the contract unit price bid which shall be full compensation for the pick-up of Attenuator units from Departmental storage sites, all handling, hauling, installation, relocation, maintenance, and when deemed of no further use on the project by the Engineer, the satisfactory removal and delivery of the units to the Department's local storage yard, including all materials, tools, equipment, labor and incidentals necessary to complete the work.

726-A Portable Concrete Safety Barriers, Type * - per linear foot {meter} 726-B Portable Concrete Safety Barriers, Type * - per linear foot {meter} 726-C State Furnished Portable Concrete Safety Barriers - per linear foot {meter} 726-D Portable Impact Attenuator ( ** ) - per each 726-E State Furnished Portable Impact Attenuator - per each * Show specific type, if required. ** Description and model of attenuator assembly TRUCK MOUNTED IMPACT ATTENUATOR

728.01Description

This Section shall cover the work of furnishing Truck Mounted Impact Attenuator Units and all services and operational supplies necessary to provide a functional unit during the life of the contract. Impact attenuator units that attach by a trailer will also be considered as truck mounted. TRAFFIC SIGNALS 624

The Contractor shall retain ownership of the truck and impact attenuator unit, including all hardware and attachments, after their use on the project is complete.

728.02Materials

All truck-mounted impact attenuator units furnished for use under this Section shall be new or acceptable used units which include all of the latest modifications to manufacturer's current production models. The Contractor shall furnish the Engineer a copy of the certification by the testing agency that the attenuator meets the performance standards given in NCHRP Report 350, TL-2 for a work zone speed limit of 45 miles per hour and TL-3 for a work zone speed limit of 50 mph or greater. Truck mounted attenuators shall be used in accordance with the manufacturer's recommendations including the support truck weight and roll ahead distance. The impact attenuator shall have a standard trailer lighting system, including brake lights, tail lights, and turn signals.

728.03Construction Requirements

The truck mounted attenuator unit furnished under this Section shall be used when work is performed under traffic.

All truck mounted impact attenuator units shall be maintained in such a manner as to provide continuous service during their use on the project. Units which become non-operational during use will require the Contractor to suspend work until the units can be repaired or replaced. The truck mounted impact attenuator units shall be stored in an approved secure storage area when not in use.

728.04Method of Measurement

Measurement of Truck Mounted Impact Attenuator Units will be made in complete functional units.

728.05Basis of Payment

The ordered and accepted truck mounted impact attenuator units under this item, measured as noted above, will be paid for at the contract unit price bid which shall be full compensation for the furnishing of the unit, complete with truck, and its exclusive use on the project, for providing all equipment, supplies, services, labor and incidentals necessary to operate and to maintain the units in good serviceable condition during the life of the contract.

728-A Truck Mounted Impact Attenuator Unit - per each TRAFFIC SIGNALS

730.01Description

This Section shall cover the work of furnishing and installing of traffic signal control equipment. These requirements may be supplemented or amended by the requirements given elsewhere in the specifications, or on the plans and Special and Standard Highway Drawings. Descriptions and definitions of the equipment, words and terminology used in the furnishing and installing of traffic signal control equipment are given in the Manual of Uniform Traffic Control Devices

Manufactures Association (NEMA), the National Electrical Code (NEC), and the International Municipal Signal Association (IMSA).

730.02Materials

All materials furnished for use shall conform to the requirements given in Section 890, shown on the plans, or listed in the MSDSAR manual. All furnished materials and equipment shall be new and free from defects. Existing equipment shall only be used if shown on the plans to be re-used.