726.01 Description.
PORTABLE CONCRETE SAFETY BARRIERS AND IMPACT ATTENUATORS
726.01 Description.
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.
726.02 Materials.
All materials furnished for use shall conform to the appropriate requirements of Division 800, Materials, the details shown on the plans and the following: Concrete Safety Barriers shall be manufactured by an approved producer in accordance with the requirements given in Section 831. Concrete, unles s otherwise provided by plan details, shall meet the requirements for Class A concrete given in Section 501. Steel Reinforcement shall meet the requirements of Section 502.
726.03 Construction Requirements.
a.General . 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 direct ed. 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 Section 501 for a Class 2 finish on exposed surfaces, unless otherwise specified by plan details. Portable Impact Attenuators sh all 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 w riting immediately after every inspection. Damaged attenuators shall immediately be repaired or replaced in accordance with the manufacturer's recommendations.
b.Handling, Storage, Transporting and Installation. The Contractor shall be responsible for th e 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.
726.04 Method of Measuremen t.
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.
728.01 Description.
726.05 Basis of Payment.
a.Unit Price Coverage .
1.Item 726-A. 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 ha ndling, 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.
2.Item 726-B. 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 u nit 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.
3.Item 726-C. The ordered and accepted State Furnished Portable Safety Barrier units, measured as noted above, shall be pai d 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 En gineer, 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.
4.Item 726-D. The ordered and accepted Portable Impact Atte nuators 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 co mplete the work.
5.Item 726- E. 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 Depart mental 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 m aterials, tools, equipment, labor and incidentals necessary to complete the work.
b.Payment will be made under Item No .: 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 Attenu ator - per each * Show specific type, if required. ** Description and model of attenuator assembly SECTION 728 TRUCK MOUNTED IMPACT ATTENUATOR
728.01 Description.
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.
Source: Alabama Standard Specifications for Highway Construction, 2022 Edition. Pages 623–623 of 934.