877.02 Portable Longitudinal Barrier
876.06 Basis of Payment
The Department will pay for each pay item at the contract unit price per the specified pay unit as follows: Pay Item: Pay Unit:
A.TRUCK MOUNTED ATTENUATOR Each or Sign Day
B.TRUCK MOUNTED IMPACT ATTEN. REPLACEMENT PACKAGE Each Approved trailer truck mounted attenuators will be paid for as Truck Mounted Attenuator. The Department assumes ownership of Truck Mounted Attenuators, paid for on an each basis. The Contractor retains ownership of Truck Mounted Attenuators, paid for on a sign day basis, unless otherwise indicated.
877.01 Description
This work consists of providing, placing, and relocating portable longitudinal ba rriers.
877.02 Materials
Provide materials in accordance with the following sections: Material: Section: Portland Cement Concrete, Class A 701 White Concrete 701.13 Reinforcing Steel 723 Submit alternative designs for approval by the Engineer before starting the manufacture of concrete barriers. The Engineer will consider alternative and special design features influencing the casting of a section, and attachments or holes that facilitate the handling and lifting of a section. Ensure alternative designs meet the exterior dimensions as shown on the Plans and perfor mance criteria in accordance with NCHRP 350 or MASH test level three (TL -3) guidelines. The Contractor may choose to use a steel barrier section instead of a concrete barrier section. The steel barrier system must be approved for use and listed on the QPL . Ensure the steel barrier system meets all performance criteria in accordance with NCHRP -350 or MASH test level three (TL -3) guidelines. Ensure all structural elements for the steel barrier system are fabricated from galvanized steel. Ensure all bolts, nuts and washers are galvanized. PORTABLE LONGITUDINAL BARRIER 877.04
877.03 Equipment
Use a transfer and transport vehicle for placing, resetting, and removing the portable longitudinal barriers on the Project as required by the Contract.
877.04 Construction Methods
At the locations shown on the Plans, or as directed by the Engineer, provide crashworthy impact attenuators or end treatments for portable longitudinal barrier systems. Ensure the portable longitudinal barrier systems and end treatments satisfy the NCHRP 350 or MASH for test leve l three (TL -3) guidelines. Submit certified test results meeting the test and performance criteria in accordance with NCHRP 350 or MASH guidelines. Deliver, locate, and align the portable longitudinal barrier system as shown on the Plans, or as directed by the Engineer. Ensure the surface between the portable longitudinal barrier system and the edge of the traveled way is smooth, without edge drop -offs, holes, depressions, or slope changes. When the Project no longer requires portable longitudinal barrier s to protect the work site or traveling public, remove the barriers and hardware from the Project. If utilizing Department owned portable longitudinal barrier, deliver it to the Department storage facility upon completion of the work requiring its use. A t the storage facility, stockpile the barrier sections and store hardware in sturdy containers marked for future use.
A.Concrete Longitudinal Barrier Before casting the portable longitudinal barrier, notify the Engineer of the casting site and start date. Mix, place, finish, and cure the longitudinal barriers in accordance with Subsection 627.04, “Construction Methods.” Submit written certification indicating barrier fabrication in accordance with the Specifications before delivering portable longitudinal barriers to the Project. Prevent damage to longitudinal barrier sections and hinges during fabrication, storage, handling, and placement. Repair minor chipping, spalling, and scars as directed by the Engineer. Make r epairs, or replace damaged sections and hinges at no additional cost to the Department. Finish surfaces supporting the portable longitudinal barrier units to provide a full and uniform bearing over the entire bearing area. Correct bearing defects as appro ved by the Engineer. Connect or join units as shown on the Plans. Align joint units horizontally and vertically to present a uniform appearance.
B.Steel Longitudinal Barrier Construct the steel barrier system from a series of individual sections. Ensur e each barrier section is no longer than 50 ft [15.24 m] and no shorter than 13 ft [3.96 m]. Anchor each end section of the barrier to the roadway in accordance with the manufacturer’s recommendations. Accomplish barrier system section connections in acc ordance with the manufacturer’s recommendations.
878.02 Modular Glare Screen
877.05 Method of Measuremen T
Measure Deliver Portable Longitudinal Barrier as the quantity of Department approved Contractor owned barrier delivered to the project, and placed in its first functional locatio n and removed from its last functional location on the project. Measure Relocation of Longitudinal Barrier as the quantity of barrier moved from one functional location to another functional location on the project site, when specified on the plans.
877.06 Basis of Payment
The Department will pay for each pay item at the contract unit price per the specified pay unit as follows: Pay Item: Pay Unit:
A.DELETED Linear Foot [Meter]
B.DELIVER PORTABLE LONGITUDINAL BARRIER Linear Foot [Meter]
C.RELOCATION OF PORT. LONGITUDINAL BARRIER Linear Foot [Meter] The Department will pay 80 percent of the contract unit price for Deliver Portable Longitudinal Barrier upon delivery and placement of the portable longitudinal barrier to the project in its fir st functional location, as shown on the Plans. The Department will pay the remaining 20 percent after removal of the barrier from its last functional location on the Project. For Relocation of Portable Longitudinal Barrier , the Department will pay the con tract unit price after the barrier is moved from one functional location to another functional location within the project limits, as shown on the Plans. SECTION 878 MODULAR GLARE SCREEN
878.01 Description
This work consists of providing and installing modular glare screen units on concrete median barriers.
878.02 Materials
Provide 10 ft [3 m] long modular glare screen units with glare screen blades, a flexible base rail, mounting brackets with hardware, and an anchor bolt system.
Source: Oklahoma Standard Specifications for Highway Construction, 2019 Edition. Pages 906–907 of 935.