Ariston Pacific, Inc. 5/9/2016 - Laserfiche WebLink

1 1 2 The last two paragraphs are revised to read: I 3 4 The Contractor may request permission to use lifting embedments, lifting embedment 5 locations, lifting angles, concrete release strengths, or temporary top strand 6 configurations other than specified in the Plans. The request shall be submitted as a 7 Type 2E Working Drawing and shall conform to the Criteria for Girder Stresses and 8 Stability for Handling, Shipping and Erecting in Section 6-02.3(25)M. The request 9 shall also address any effects on girder camber. 10 11 If girders are to be stored, the Contractor shall place them on a stable foundation that 12 will keep them in a vertical position. Stored girders shall be supported at the bearing 13 recesses or, if there are no recesses, approximately 2 to 3 feet from the girder ends. 14 After post-tensioning, spliced prestressed concrete girders shall be supported at points 15 between 2 and 5 feet from the girder ends, unless otherwise shown in the Plans. For 16 long-term storage of girders with initial horizontal curvature, the Contractor may wedge 17 one side of the bottom flange, tilting the girders to control curvature. If the Contractor 18 elects to set girders out of plumb during storage, the Contractor shall have the proposed 19 method analyzed by the Contractor's engineer to ensure against damaging the girder. 20 21 6-02.3(25)M Shipping 22 This section is revised to read: 23 24 After the girder has reached its 28-day design strength, the girder and a completed 25 Certification of Compliance, signed by a Precast/Prestressed Concrete Institute 26 Certified Technician or a Professional Engineer, shall be submitted to the Engineer for 27 inspection. If the Engineer finds the certification and the girder to be acceptable, the 28 Engineer will stamp the girder"Approved for Shipment". 29 30 No prestressed concrete slab girder shall be shipped for at least 3 days after concrete 31 placement. No prestressed concrete wide flange deck, deck bulb tee or tub girder shall 32 be shipped for at least 7 days after concrete placement, except that they may be 33 shipped 3 days after concrete placement when U(bd) is less than or equal to 5.0, where 34 L equals the shipping length of the girder, b equals the girder top flange width (for 35 prestressed concrete wide flange deck and deck bulb tee girders) or the bottom flange 36 width (for prestressed concrete tub girders), and d equals the girder depth, all in feet. 37 No other girder shall be shipped for at least 10 days after concrete placement. 38 111 39 Girder support locations during shipping shall be no closer than the girder depth to the 40 ends of the girder at the girder centerline. Support locations shown in the Plans have 41 been determined in accordance with the criteria specified below. The Contractor shall 42 verify the applicability of these criteria to the trucking configuration intended for transport 43 of the girders. If the trucking configuration differs from these criteria, or the Contractor 44 proposes to use support locations other than those shown in the Plans, the Contractor 45 shall submit a girder shipping plan with supporting calculations conforming to the criteria III 46 specified below as a Type 2E Working Drawing. 47 48 If the Contractor elects to assemble spliced prestressed concrete girders into 49 components of two or more segments prior to shipment, the Contractor shall submit a 50 girder shipping plan with supporting calculations conforming to the criteria specified 51 below as a Type 2E Working Drawing. 52 I AMENDMENTS TO THE 2014 STANDARD SPECIFICATIONS BOOK Revised: 8/3/15