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

I 1 2. Shipment—Within 7 days prior to shipment; I 2 3 3. Erection —After girder erection and cutting temporary top strands but prior to 4 any equalization, placement of weld ties or placement of diaphragms. 5 I6 At a minimum, survey data shall be taken at each girder end and at midspan. The 7 Contractor shall perform and record each check at a time when the alignment of the 8 girder is not influenced by temporary differences in surface temperature. Records for 1 9 the initial check (Item 1 above) shall be included in the Contractor's Prestressed 10 Concrete Certificate of Compliance. Records for all other checks shall be submitted as a 11 Type 1 Working Drawing. I 12 13 The "D" dimensions shown in the Plans are computed upper and lower bounds of girder 14 vertical deflections at midspan based on a time lapse of 40 and 120 days after release 15 of the prestressing strands. Any temporary top strands are assumed to be cut 30 days 16 prior to these elapsed times (10 and 90 days after release of the prestressing strands). 17 The "D" dimensions are intended to advise the Contractor of the expected range of 18 girder vertical deflection at the time of deck placement. A positive (+) "D" dimension 19 indicates upward deflection. 20 21 If the girder vertical deflection measured for the shipment check (Item 2 above) is not I22 between the lower bound shown in the Plans and the upper bound shown in the Plans, 23 the Contractor shall immediately notify the Engineer and shall submit the camber data 24 as a Type 2 Working Drawing. The Engineer shall be notified prior to shipping the 1 25 girders. 26 27 If the girder vertical deflection measured for the erection check (Item 3 above) is not I 28 between the lower bound shown in the Plans and the upper bound shown in the Plans 29 plus 3/ inches, the Contractor shall submit a Type 2 Working Drawing describing how 30 the deficient or excess girder camber will be addressed. I 31 32 All costs including bridge deck form adjustments, maintaining steel reinforcing bar 33 clearances, changes in deck profile or thickness, or any other modifications needed to I 34 accommodate girder deflections shall be at the Contractor's expense. 35 36 6-02.3(25)L Handling and Storage I 37 The first paragraph is revised to read: 38 39 During handling and storage, each prestressed concrete girder shall always be kept 40 plumb and upright. It shall be lifted only by the lifting embedments (strand lift loops or 1 41 high-strength threaded steel bars) at either end. 42 43 The first sentence of the third paragraph is revised to read: I 44 45 For high-strength threaded steel bars, a minimum of two 1%-inch diameter bars 46 conforming to Section 9-07.11 shall be used at each end of the girder. I 47 48 The third sentence of the fourth paragraph is revised to read: 49 50 Alternatively, these temporary strands may be post-tensioned provided the strands are 51 stressed on the same day that the permanent prestress is released into the girder and 52 the strands are tensioned prior to lifting the girder from the form. I I AMENDMENTS TO THE 2014 STANDARD SPECIFICATIONS BOOK Revised: 8/3/15