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

1 1 I 2 2-02.3(2)A Bridge Removal 3 2-02.3(2)A1 Bridge Demolition Plan Submittal 4 The Contractor shall submit a Type 2E Working Drawing consisting of a bridge 5 demolition plan, showing the method of removing the existing bridge(s), or portions I6 of bridges, as specified. 7 8 The bridge demolition plan shall show all equipment, sequence of operations, and 1 9 details required to complete the work, including containment, collection, and 10 disposal of all debris. The plan shall include a crane foundation stability analysis 11 and crane load calculations for the work. The plan shall detail the containment, I 12 collection, and disposal of all debris. The plan shall show all stages of demolition. 13 14 When the bridge removal work includes removal of a truss, and when the 15 Contractor's removal method involves use of a crane or cranes to pick, lift, and 16 remove the truss, the Contractor shall confirm the truss dead load weight prior to 17 beginning the truss removal operation. The operation of confirming the truss dead 18 load shall be performed at both ends of the truss, and shall ensure that the truss is 19 broken free of its support bearings. The Contractor's method of confirming the 20 truss dead load, whether by hydraulic jacks or other means, shall be included in the 21 Contractor's bridge demolition plan submittal. I 22 23 When the bridge removal work involves removing portions of existing concrete 24 without replacement, the methods and tools used to achieve the smooth surface I 25 and profile specified in Section 2-02.3(2)A2 shall be included in the Contractor's 26 bridge demolition plan submittal. 27 I 28 2-02.3(2)A2 Removing Portions of Existing Concrete 29 Care shall be taken in removing concrete to prevent overbreakage or damage to 30 portions of the existing Structure which are to remain. Before concrete removal I 31 begins, a saw cut shall be made into the surface of the concrete at the perimeter of 32 the removal limits. The saw cut shall be 3/4-inch deep when the steel 33 reinforcement is to remain, and may be deeper when the steel reinforcement is I 34 removed with the concrete. 35 36 Concrete shall be completely removed (exposing the deformed surface of the bar) 37 from existing steel reinforcing bars which extend from the existing members and I 38 are specified to remain. Steel reinforcing bars that are not designated to remain 39 shall be cut a minimum of 1-inch behind the final surface. The void left by removal 40 of the steel reinforcing bar shall be filled with mortar conforming to Section 9- I 41 20.4(2). The mortar shall match the color of the existing concrete surface as nearly 42 as practicable. 43 I 44 The Contractor shall roughen, clean, and saturate existing concrete surfaces, 45 against which fresh concrete will be placed, in accordance with Section 6- 46 02.3(12)B. When a portion of existing concrete is to be removed without I 47 replacement, concrete shall be removed to a clean line with a smooth surface of 48 less than 1/16 inch profile. 49 I 50 2-02.3(2)A3 Use of Explosives for Bridge Demolition 51 Explosives shall not be used for bridge demolition, except as specifically allowed by 52 the Special Provisions. I I AMENDMENTS TO THE 2014 STANDARD SPECIFICATIONS BOOK Revised: 8/3/15