620.1 General Description
This work provides for Method 1 and Method 2 temporary barrier systems.
620.1.01 Definitions
Method 1- Method of furnishing, placing, maintaining, moving, and reusing where required, and removing temporary barrier of the length and at the locations shown on the Plans. Method 1 barrier is not suitable on bridges where the distance from the centerline of the barrier to the free edge of the bridge deck is less than 6 ft.- 0 in. (1.8 m) measured normal to the barrier. Method 2- Method of furnishing, placing, maintaining, moving, and reusing where required, and removing manufactured barrier of the length, and at the locations shown on the Plans. Method 2 barrier is to be used on bridges and bridge approaches where the distance from the centerline of the barrier to the free edge of the bridge deck is less than 6 ft.- 0 in. (1.8 m) measured normal to the barrier.
620.1.02 Related References
A. Standard Specifications Section 500—Concrete Structures Section 501—Steel Structures Section 511—Reinforcement Steel B. Referenced Documents General Provisions 101 through 150 National Cooperative Highway Research Program (NCHRP) Report 350 Manual for Assessing Safety Hardware (MASH) Report No. TRP-03-386-19 – MASH TL-3 Evaluation of Concrete and Asphalt Tied-Down Anchorage for Portable Concrete Barrier
620.1.03 Submittals
Method 1 - For temporary barrier produced on or before December 31, 2019, submit certification from the manufacturer that the proposed barrier and its interconnecting hardware replicate an NCHRP-350 or MASH “Test Level 3” approved barrier, documented in an eligibility letter from FHWA or certification that the barrier meets the requirements of Ga. Std. 4961. Submit all certification documents to the engineer prior to delivery of the barrier to the project. For temporary barrier produced after December 31, 2019, submit certification from the manufacturer that the proposed barrier and its interconnecting hardware replicate a MASH 2016 “Test Level 3” approved barrier, documented in an eligibility letter from FHWA. Submit all certification documents to the engineer prior to delivery of the barrier to the project. Method 2 - For temporary barrier produced on or before December 31, 2019, submit certification from the manufacturer that the proposed barrier and its interconnecting hardware replicate an NCHRP-350 or MASH “Test Level 3” approved barrier, documented in an eligibility letter from FHWA and that the barrier does not deflect more than 1 ft. – 0 in. (300mm) under NCHRP-350 or MASH test conditions. Attach the eligibility letter stating that the proposed barrier is in compliance with NCHRP-350 or MASH “Test Level 3” and that the barrier meets the deflection criteria to the certification. Submit all certification documents to the engineer prior to delivery of the barrier to the project. For temporary barrier produced after December 31, 2019, submit certification from the manufacturer that the proposed barrier and its interconnecting hardware replicate a MASH 2016 “Test Level 3” approved barrier, documented in an eligibility letter from FHWA and that the barrier does not deflect more than 1’- 0” (300mm) under MASH 2016 test conditions or certification that the proposed barrier, its interconnecting hardware, and anchoring system replicate the Midwest F-Shape (22.5”x32”x12.5’) and Technical Report TRP-03-386-19 (for deck depths less than 8 in., anchor bolt must extend through deck with washer and nut on underside of deck). For barrier other than the Midwest F-Shape, attach the eligibility letter stating that the proposed barrier is in compliance with MASH 2016 “Test Level 3” and that the barrier meets the deflection criteria to the certification. Submit all certification documents to the engineer prior to delivery of the barrier to the project.
620.2 Materials
A. Method 1 Supply a temporary barrier. Ensure that materials are in accordance with the manufacturer’s recommendations, specifications, and details or that the materials meet the requirements of the Standard Specifications and Ga. Std. 4961. B. Method 2 Supply a temporary barrier. Ensure that materials used in the barrier are in accordance with the manufacturer’s recommendations, Specifications, and details.
620.2.01 Delivery, Storage, and Handling
General Deliver, store, and handle barrier in accordance with the manufacturer’s recommendations. Repair damage to the barrier and its connections in accordance with the manufacturer’s recommendations at no additional cost to the Department prior to acceptance for use by the Department .
620.3 Construction Requirements
620.3.01 Personnel
General Provisions 101 through 150.
620.3.02 Equipment
General Provisions 101 through 150.
620.3.03 Preparation
General Provisions 101 through 150
620.3.04 Fabrication
A. Method 1 Perform barrier fabrication as detailed on Ga. Std. 4961 or in accordance with the manufacturer’s recommendations. B. Method 2 Perform barrier fabrication in accordance with the manufacturer’s recommendations.
620.3.05 Construction
A. General Handle and transport units to prevent damage and/or as recommended by the manufacturer. When required, use units at one or more sites on the same project. Ensure that the units are complete and in acceptable condition and located where designated on the plans or directed by the Engineer before acceptance by the Department. Use the Plan quantity of barrier effectively to complete the work within the Contract time. If scheduling the work requires additional barrier, furnish it at no additional expense to the Department. Use only one section shape, length, and connection type in a single run of interconnected barrier. Interconnect all barrier sections within each single run of barrier. B. Method 2 Rigidly attach the barrier to the bridge deck and extend it off the bridge a transition distance indicated in the Standard Plans. Use non-shrink grout to fill all holes remaining in permanent bridge decks after barrier is removed.
620.3.06 Quality Assurance
General Provisions 101 through 150.
620.3.07 Contractor Warranty and Maintenance
General Provisions 101 through 150.
620.4 Measurement
This work will be measured per unit {per linear foot (meter)} of accepted barrier delivered and used. The quantity shall be computed by multiplying the number of units by the length of each unit as per Standard 4961 or approved alternate, subject to the maximum amount specified in Subsection 620.3.05.
620.4.01 Limits
General Provisions 101 through 150.
620.5 Payment
This work is paid for at the Contract Price per linear foot (meter) of temporary barrier Method 1or barrier Method 2 as designated complete in place. Payment includes fabrication, use, moving, reuse, and removal of the units. No separate payment will be made for moving and/or reusing units during the work or for using additional units beyond the plan quantity to facilitate the construction schedule. No separate payment will be made for filling holes used to bolt Method 2 barrier to bridge decks. The first 75 percent of the Contract Unit Price bid will be paid on the first monthly estimate following initial delivery, installation, and acceptance. The remaining 25 percent will be paid when the project is complete or when the material is no longer needed and removed from the Project, whichever applies. Payment will be made under: Item No. 620 Temporary Barrier, Method No. 1 Per linear foot (meter) Item No. 620 Temporary Barrier, Method No. 2 Per linear foot (meter)
620.5.01 Adjustments
General Provisions 101 through 150.
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