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.
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. MODULAR GLARE SCRE EN 878.04 Provide modular glare screen blades and base rail manufactured from frangible or flexible light -weight material. Provide modular glare screen in accordance with Table 878:1: Table 878:1 Modular Glare Screen Blade Properties Property Measurement Weight ≤0.9 lb/ft [1.30 kg/m] Width 4½ in – 6 in [115 mm – 150 mm] Specific gravity 0.90 – 1.70 Tensile strength ≥2,900 psi [20,000 kPa] Provide green modular glare screen blades similar to Federal Standard Number 595 -34227.
A.Base Rail Provide base rail in accordance with Table 878:2: Table 878:2 Base Rail Properties Property Measurement Weight ≤1.4 lb/ft [2.00 kg/m] Width 4½ in [115 mm] – 6 in [150 mm] Rail tensile strength ≥2,900 psi [20,000 kPa]
B.Weatherability Provide glare screen blades and base rails that retain mechanical properties from −40 °F to 150 °F [−40 °C to 65 °C] and show minimum degradation after 3,000 hr in a weatherometer.
C.Certification Submit to the Resident Engineer a Type D materials certifi cation in accordance with Section 106.04, “Material Certifications.”
878.03 Equipment — Vacant
878.04 Construction Methods
Install unit component parts as shown on the Plans and in accordance with the manufacturer’s recommendations. Fasten each base rail section to the barrier wall in at least three locations. Ensure the connections have a pullout strength of at least 2,900 psi [20,000 kPa] and a shear strength of at least 2,900 psi [20,000 kPa].
880.02 Construction Signing and Traffic Control
878.05 Method of Measurement — Vacant
878.06 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.MODULAR GLARE SCREEN (PERMANENT) Each or Linear Foot [Meter]
B.MODULAR GLARE SCREEN (TEMPORARY) Sign Day SECTION 880 CONSTRUCTION SIGNING AND TRAFFIC CONTROL
880.01 Description
This work consists of providing and erecting signs, lights, barricades, and other devices.
880.02 Materials
A.General Provide materials for construction signing and traffic control in accordance with NCHRP 350 report or MASH Test Level 3 (TL -3), with letter of acceptance/eligibility from the FHWA.
B.Construction Signing and Traffic Control Materials
1.Arrow Display Provide each arrow display with a circuitry control unit, a mounting frame, and a sign panel with yellow sealed beam lamps attached in accordance with MUTCD Section 6F-3. Provide non -reflective black finish for panel fac es exposed to oncoming traffic. Provide a control unit to display higher intensity during the day and lower intensity at night. Ensure lamps display the same light intensity for a given setting. The Department will only allow the substitution of larger p anels for smaller panels. Provide a mounting frame to support the sign panel so the bottom edge of the panel is at least 7 ft [2.1 m] above the roadway surface when displayed to oncoming traffic. Mount arrow displays so the panel rotates on a horizontal a xis to hide it from the view of oncoming traffic when not in use. Mount mobile arrow displays on pneumatic -tired vehicles. Provide a power source with a separate auxiliary power source that can be immediately available to operate flashing lights. Provide a self -contained battery or electric generator power source on mobile arrow displays.
Source: Oklahoma Standard Specifications for Highway Construction, 2019 Edition. Pages 908–909 of 935.