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18TH STREET PEDESTRIAN IMPROVEMENTS 3741 RMT July 03, 2024 43 5-04.3(3)C Pavers 1 HMA pavers shall be self-contained, power-propelled units, provided with an internally 2 heated vibratory screed and shall be capable of spreading and finishing courses of HMA 3 plant mix material in lane widths required by the paving section shown in the Plans. 4 5 The HMA paver shall be in good condition and shall have the most current equipment 6 available from the manufacturer for the prevention of segregation of the HMA mixture 7 installed, in good condition, and in working order. The equipment certification shall list 8 the make, model, and year of the paver and any equipment that has been retrofitted. 9 10 The screed shall be operated in accordance with the manufacturer’s recommendations 11 and shall effectively produce a finished surface of the required evenness and texture 12 without tearing, shoving, segregating, or gouging the mixture. A copy of the 13 manufacturer’s recommendations shall be provided upon request by the Contracting 14 Agency. Extensions will be allowed provided they produce the same results, including 15 ride, density, and surface texture as obtained by the primary screed. Extensions without 16 augers and an internally heated vibratory screed shall not be used in the Traveled Way. 17 18 When specified in the Contract, reference lines for vertical control will be required. Lines 19 shall be placed on both outer edges of the Traveled Way of each Roadway. Horizontal 20 control utilizing the reference line will be permitted. The grade and slope for intermediate 21 lanes shall be controlled automatically from reference lines or by means of a mat 22 referencing device and a slope control device. When the finish of the grade prepared for 23 paving is superior to the established tolerances and when, in the opinion of the Engineer, 24 further improvement to the line, grade, cross-section, and smoothness can best be 25 achieved without the use of the reference line, a mat referencing device may be 26 substituted for the reference line. Substitution of the device will be subject to the 27 continued approval of the Engineer. A joint matcher may be used subject to the approval 28 of the Engineer. The reference line may be removed after the completion of the first 29 course of HMA when approved by the Engineer. Whenever the Engineer determines that 30 any of these methods are failing to provide the necessary vertical control, the reference 31 lines will be reinstalled by the Contractor. 32 33 The Contractor shall furnish and install all pins, brackets, tensioning devices, wire, and 34 accessories necessary for satisfactory operation of the automatic control equipment. 35 36 If the paving machine in use is not providing the required finish, the Engineer may 37 suspend Work as allowed by Section 1-08.6. Any cleaning or solvent type liquids spilled 38 on the pavement shall be thoroughly removed before paving proceeds. 39 40 5-04.3(3)D Material Transfer Device or Material Transfer Vehicle 41 A Material Transfer Device/Vehicle (MTD/V) shall only be used with the Engineer’s 42 approval, unless otherwise required by the contract. 43 44 Where an MTD/V is required by the contract, the Engineer may approve paving without 45 an MTD/V, at the request of the Contractor. The Engineer will determine if an equitable 46 adjustment in cost or time is due. 47 48