Laserfiche WebLink
1 19.3(2)B, and the Engineer's review of Contractor's daily reports and Inspector's <br /> 2 daily logs concerning excavation, steel reinforcing bar placement, and concrete <br /> 3 placement. <br /> 4 <br /> 5 6-19.3(6) Access Tubes for Crosshole Sonic Log (CSL) Testing <br /> 6 This section title is revised to read: <br /> 7 <br /> 8 6-19.3(6) Contractor Furnished Accessories for Nondestructive QA Testing <br /> 9 <br /> 10 This section is supplemented with the following three new subsections: <br /> 11 <br /> 12 6-19.3(6)D Shafts Requiring Thermal Wire <br /> 13 The Contractor shall furnish and install thermal wire in all shafts receiving the thermal <br /> 14 wire method of TIP testing, except as otherwise noted in Section 6-19.3(1)B1. <br /> 15 <br /> 16 6-19.3(6)E Thermal Wire and Thermal Access Points (TAPs) 111 <br /> 17 The thermal wire and associated couplers shall be obtained from the source specified in <br /> 18 the Special Provisions. <br /> 19 <br /> 20 The Contractor shall securely attach the thermal wire to the interior of the reinforcement <br /> 21 cage of the shaft in conformance with the supplier's instructions. At a minimum, one <br /> 22 thermal wire shall be furnished and installed for each foot of shaft diameter, rounded to <br /> 23 the nearest whole number, as shown in the Plans. The number of thermal wires for <br /> 24 shaft diameters specified as "X feet 6 inches" shall be rounded up to the next higher <br /> 25 whole number. The thermal wires shall be placed around the shaft, inside the spiral or <br /> 26 hoop reinforcement, and tied to the vertical reinforcement with plastic "zip" ties at a <br /> 27 maximum spacing of 2-feet. Steel tie wire shall not be used. <br /> 28 <br /> 29 The thermal wire shall be installed in straight alignment and taut, but with enough slack <br /> 30 to not be damaged during reinforcing cage lofting. The wires shall be as near to parallel <br /> 31 to the vertical axis of the reinforcement cage as possible. The thermal wire shall extend <br /> 32 from the bottom of the reinforcement cage to the top of the shaft, with 15-feet of slack <br /> 33 wire provided above the top of shaft. Care shall be taken to prevent damaging the <br /> 34 thermal wires during reinforcement cage installation and concrete placement operations <br /> 35 in the shaft excavation. ' <br /> 36 <br /> 37 After completing shaft reinforcement cage fabrication at the site and prior to installation <br /> 38 of the cage into the shaft excavation, the Contractor shall install and connect thermal <br /> 39 access points (TAPs) to the thermal wires. The TAPs shall record data for at least one <br /> 40 hour after the cage is placed in the excavation to measure the slurry temperature and <br /> 41 enable the steel and slurry temperatures to equilibrate prior to placing concrete in the <br /> 42 shaft. The TAPs shall record and store data every 15 minutes. The TAPs shall remain <br /> 43 active for a minimum of 36 hours. <br /> 44 <br /> 45 Prior to beginning concrete placement the TAPs shall be checked to ensure they are <br /> 46 recording data and that the wires have not been damaged. If a TAP unit is not <br /> 47 functioning due to a damaged wire, the Contractor shall repair or replace the wire. If a <br /> 48 TAP unit fails or a wire breaks after concrete placement has started, the Contractor <br /> 49 shall not stop the concrete placement operation to repair the wire. <br /> 50 <br /> 111 <br /> AMENDMENTS TO THE 2016 STANDARD SPECIFICATIONS BOOK <br /> Revised: 8/1/16 <br />