9−50 The Contractor shall be required to perform all maintenance recommended by the manufacturer of the units, as required to keep the unit operating properly. Said maintenance shall include the periodic cleaning of the units. The units shall be kept in good repair at all times. If there is a failure, malfunction, or damage to the unit for any reason, the Contractor will expedite the repair and furnish adequate flaggers or other approved means to pr ovide a safe means for control of traffic until the units are put back into service. 925.04 METHOD OF MEASUREMENT. "Portable Changeable Message Signs" will be measured by number of days the unit is act ually employed in the construction work in accordance with the Plans and/or as directed by the Engineer. 925.05 BASIS OF PAYMENT. The accepted quantity of "Portable Changeable Message Signs" will be paid for at the contract unit price per day as listed in the Proposal. The price so-stated constitutes full and complete compensation for all labor, materials, and equipment including the unit itself, first placement thereof, temporary storage, repositioning at different locations, diesel fuel, electric power, batteries, maintenance, and all incidentals necessary to finish the work, complete and accepted by the Engineer. SECTION 926 ANCHORED AND UNANCHORED PRECAST CONCRETE BARRIER FOR TEMPORARY TRAFFIC CONTROL
926.01 DESCRIPTION. This work consists of providing anchored or unanchored precast concrete
barrier for temporary traffic control at the locations shown on the Plans or as directed by the Engineer, all in accordance with these Specifications. Anchored barrier on bridge decks will be double-face type barrier except when single-face type units are specified on the Plans.
926.02 Materials.
926.02.1 Anchored and Unanchored Barrier Units. Portland cement concrete and reinforcing
shall conform to the requirements of Subsection 909.02.1 of these Specifications.
926.02.2 Delineators. Delineators shall have a minimum of 9 square inches of reflective surface
area. The unit shall be capable of being mounted on the side of barrier by use of an adhesive or other method approved by the manufacturer. Such delineators may be one of those products which appear on the Department's Approved Materials List.
926.02.3 High Strength Non-Shrink Grout. High Strength Non-Shrink Grout shall conform to the
requirements of Subsection 819.02.2 of these specifications.
926.02.4 Anchorage System. For new or existing bridge decks, anchors shall be a minimum ¾
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.