9−51inch diameter and shall be listed on the Department’s approved materials list. Each anchor must be capable of developing a minimum of 6,000 pounds tension and 2500 pounds shear for a 10-foot barrier section, with the number of anchors and spacing as shown on the Plans. Anchors shall be installed per manufacturer’s recommendations. For existing bridge decks, ¾ inch minimum diameter through-bolts may be used in lieu of adhesive or expansion anchors. All anchors, nuts and washers shall conform to ASTM A325 and shall be galvanized according to ASTM A153. All bolts, anchors, nuts, and washers shall conform to the applicable requirements of Subsection M.05.04.4 of these Specifications except as modified by the Plans. Other anchorage systems may be used in lieu of above only upon approval of the Engineer.
926.03 Construction Methods.
926.03.1 Plant Requirements. Plant requirements shall conform to the applicable provisions of
Subsection 909.03.1 of these Specifications.
926.03.2 Delineators. White delineators shall be installed on the right side of the travel way and
amber delineators on the left side of the travel way. The delineators shall be installed at 50-foot intervals and they shall be located 3 inches from the top of the concrete barriers.
926.03.3 Placement. Precast concrete barrier used for temporary traffic control shall be placed on
the pavement at locations indicated on the Plans or as directed by the Engineer. Care shall be exercised during transporting, storing, hoisting and handling of the units to prevent cracking or damage. No damaged units or units that have markings painted on them from previous work-sites shall be installed. Units showing defects or damage as a result of the Contractor's operations or negligence shall be remo ved and replaced or repaired by the Contractor at no additional cost to the State. Unanchored barrier shall be carefully removed fr om their initial locations and transported to alternate locations where they shall be plac ed on the pavement as directed by the Engineer. Anchored barrier units shall be firmly secured to the bridge deck surface. Traffic shall not be allowed near the barrier until units are firmly anchored and highway approach transitions are in place. Anchors shall be placed on the traffic side of the barrier and located such that interference with the longitudinal deck reinforcement is minimized. Prior to barrier placement, deck reinforcement shall be located and marked using a pachometer. The position of the barrier shall then be adjusted, at the direction of the Engineer, to minimize interference between the anchors and deck reinforcement. The barrier units shall be placed in such a manner as not to leave exposed blunt ends of said units.
926.03.4 Removal. Upon completion of the work the Contractor shall completely remove and
legally dispose of said barrier units from the project site. For anchored barrier, the remaining holes in the new deck shall be patched with high strength non-shrink grout. 9−52 926.04 METHOD OF MEASUREMENT.
926.04.1 Unanchored Barrier Units. “Unanchored Precast Concrete Barrier for Temporary Traffic
Control” will be measured in linear feet of continuous runs of those units actually placed in accordance with the Plans and/or as directed by the Engineer. The measured length includes all 3- inch joints between the units.
926.04.2 Anchored Barrier Units. “Anchored Precast Concrete Barrier for Temporary Traffic
Control" and “Anchored Single-Face Precast Concrete Barrier for Temporary Traffic Control” will be measured in linear feet of continuous runs of those units actually placed in accordance with the Plans and/or as directed by the Engineer. The measured length includes all 3-inch joints between the units.
926.04.3 Delineators. “Reflective Delineators" will be m easured by the number of said units
provided and installed in accordance with the Plans and/or as directed by the Engineer.
926.05 BASIS OF PAYMENT. 926.05.1 Unanchored Barrier Units. The accepted quantity of "Unanchored Precast Concrete
Barrier for Temporary Traffic Control" will be paid for at the contract unit price per linear foot as listed in the Proposal. The price so-stated consti tutes full and complete compensation for all labor, tools, materials, equipment, initial placement of the units in accordance with the Plans, furnishing, hauling, handling, any new parts required to secure the units to the pavement or to adjacent units, subsequent removal of said units and for all incidentals required to finish the work, complete and accepted by the Engineer. The Contractor shall not be compensated for any work necessary to realign barrier units if they are disturbed or damaged as a result of the Contractor’s operations. The Contractor shall be paid 90 percent of the contract unit price when the barrier units are in place. The remaining 10 percent of the contract unit price will be paid when the barrier units have been removed from the project.
926.05.2 Anchored Barrier Units. The accepted quantity of "Anchored Precast Concrete Barrier
for Temporary Traffic Control" and “Anchored Single-Face Precast Concrete Barrier for Temporary Traffic Control” will be paid for at the contract unit price per linear foot as listed in the Proposal. The price so-stated constitutes full and complete compens ation for all labor, tool s, materials, equipment, initial placement of the units in accordance with the Plans, anchoring, furnishing, hauling, handling, any new parts required to secure the units to the bridge deck or to adjacent units, subsequent removal of said units, grouting and for all incidentals required to finish the work, complete and accepted by the Engineer. The Contractor shall not be compensated for any work necessary to realign barrier units if they are disturbed or damaged as a result of the Contractor’s operations. The Contractor shall be paid 90 percent of the contract unit price when the barrier units are in place. The remaining 10 percent of the contract unit price will be paid when the barrier units have been removed from the project.
926.05.3 Delineators. The accepted quantity of “Reflective Delineators" for anchored and
unanchored barrier units will be paid for at the contra ct unit price per each as listed in the Proposal. The price so-stated constitutes full and complete compensation for all labor, materials and 9−53equipment, including surface preparation and adhesives, and all incidentals required to finish the work, complete and accepted by the Engineer. SECTION 927 [SECTION NOT USED] SECTION 928 TRUCK MOUNTED ATTENUATOR (TMA) WITH TRUCK MOUNTED FLASHING ARROW BOARD (TMFAB)
928.01 DESCRIPTION. This work consists of providing, operating, and maintaining truck mounted
energy absorbing impact attenuators, replacem ent attenuator cartridges, and truck mounted flashing arrow boards, at the locations indicated on the Plans or as directed by the Engineer, all in accordance with these Specifications. 928.02 MATERIALS. 928.02.1 Truck Mounted Attenuator (TMA). The TMA is a lightweight attenuation system designed for installation at the back of traffic control trucks. It consists of three basic component sections - a crushable module, a lightweight steel backup, and a support frame for attaching the backup to the truck. The complete TMA shall be designed to make attachment or detachment from the truck simple and fast and shall be installed in accordance with the manufacturer's recommendations.
a.Module Materials. Light fixtures shall consist of combination run, turn, brake, and side clearance lights with ICC identification lights on the rear of the TMA. All light fixtures shall have rubber grommet seals. A standard SAE/AT/TTMA interchangeable 7-way trailer light wire connector shall be installed and wired to SAE standards. All standard modules shall have a chevron patte rn painted on the rear of the module. The standard chevron pattern shall have 4-inch wide st ripes, alternating black and yellow, slanted at 45 degrees in an inverted "V" form with the "V" located at the center of the module. All standard modules assembly shall be covered for debris containment during an impact and for environmental protection.
b.Crushable Frame. The crushable frame which supports the TMA assembly shall be fabricated from standard steel shapes. The module shall be fastened to the internal frame.
c.Steel Backup. The steel backup shall be special lightweight assembly which shall support the TMA cartridge during normal use and shall resist the loads applied to it during impacts.
Source: Rhode Island Standard Specifications (Bluebook), 2024 Edition. Pages 583–585 of 826.