800-34b. Temporary Precast Concrete Safety Barrier. The Engineer will measure the precast concrete safety

800-34 b. Temporary Precast Concrete Safety Barrier. The Engineer will measure the precast concrete safety

barrier by the linear foot (number of sections times the nominal section lengt h). A precast concrete safety barrier transition section (regardless of actual length) will be me asured as a nominal section length of temporary precast concrete safety barrier. The quantity of precast concrete safety barrier measur ed for payment is the maximum quantity required on the project at any one time, plus any replacement sections measured for payment, and is paid fo r as Concrete Safety Barrier (*) (Temporary). Each section of temporary precast concrete safety barrier will be measur ed for payment when put in use on the project. Sections of temporary precast concrete safety barrier used to replace sec tions damaged by traffic while in use will be measured for payment and paid as Concrete Safety Barrier (*) (Tempor ary-Installation Only) when put in use on the project. When provided by the Cont ractor, sections of temporary precast conc rete safety barrier used to replace deteriorated sections or sections damaged through negligen ce of the Contractor are not measured for payment. When stage construction requires that the precast concre te safety barrier be moved from its initial position to an alternate position, the Engineer will measure the relocated barrier by the linear foot (number of sections times the nominal section length). The barrier will be measured for payment in each relocated position the barrier is placed and is paid as Concrete Safety Barrier (* ) (Temporary-Relocate). If the stage c onstruction requires that the barrier be removed from the project to a storage location, and returned to the project during a subse quent construction stage, each movement of the barrier will be considered a relocation. Removal of the precast concrete safety barrier, when no longer required on the proj ect, is not measured for separate payment. Payment for "Concrete Safety Barrier (*) (Temporary)", "Concrete Safety Barrier (*) (Temporary-Installation Only)", and "Concrete Safety Barrier (*) (Temporary-Relocate)" at the contract unit prices is full compensation for the specified work. The quantities shown in the Contract Documents for the various items of temporary precast concrete safety barrier are estimated. The contract unit prices will not be adjusted, regardless of overruns or underruns. 810 - INERTIAL BARRIER SYSTEM

800-35 Section 810

INERTIAL BARRIER SYSTEM 810.1 DESCRIPTION Install and relocate inertial barrier systems as shown in the Contract Documents. Stockpile the replacement modules at the project site. B I D I T E M S U N I T S Inertial Barrier System Each Replacement Modules (*) Each *Series 810.2 MATERIALS Provide aggregate for underdrains, UD-1 or fine ag gregate for concrete, or FA-A that complies with

Division 1100

Provide inertial barrier systems and replacement modules that comply with DIVISION 1700 . Provide commercially available rock salt. The Engineer will accept the rock salt based on visual inspection at the point of usage. Impact attenuators prequalified under DIVISION 1700 may be substituted for inertial barrier systems with approval of the Engineer. 810.3 CONSTRUCTION REQUIREMENTS Provide the Engineer with the manufacturer’s product data sheets for the inertial barrier system. Install the inertial barrier system according to the manufacturer’s recommendations. At the beginning of each project and in the presence of the Engineer, fill the inertial barrier system modules with a mixture of 95% aggregate and 5% rock salt by weight . Use aggregate with a moisture content of 3% or less by weight, determined according to DIVISION 2500 . Fill each of the modu les with any of the specified mixture of aggregates and rock salt. Do not mix the types of aggregates within a module. When shown in the Contract Documents relocate the inertial barrier system. Install replacement modules of the inertial barrier system when damaged by traffic. Unless otherwise noted in the Contract Documents, the inertial barrier system and replacement modules are the property of the Contractor upon completion of the project. 810.4 MEASUREMENT AND PAYMENT The Engineer will measure each inertial barrier system . Each unit will be measured only once, even if the unit is relocated on the project. The Engineer will measure each replacement module used on the project. The quantity of replacement modules stockpiled on the project site, but not used on the project, will not be measured for payment. Payment for each for "Inertial Barrier System" and "Rep lacement Modules" at the contract unit prices is full compensation for the specified work. 811 – IMPACT ATTENUATOR