Jansen Inc 6/10/2019 - Laserfiche WebLink

1 1 recommended by the manufacturer. The grout may be loaded when a minimum of 4,000 2 psi compressive strength is attained. 3 • 4 The fifth paragraph is deleted. 5 6 6-02.3(23) Opening to Traffic 7 This section is supplemented with the following new paragraph: 8 9 After curing bridge approach slabs in accordance with Section 6-02.3(11), the 10 bridge approach slabs may be opened to traffic when a minimum compressive strength 11 of 2,500 psi is achieved. 12 13 6-02.3(24)C Placing and Fastening ' 14 This section is revised to read: 15 16 The Contractor shall position reinforcing steel as the Plans require and shall ensure that the 17 steel is set within specified tolerances. Adjustments to reinforcing details outside of 18 specified tolerances to avoid interferences and for other purposes are acceptable when 19 approved by the Engineer. 20 21 When spacing between bars is 1 foot or more, they shall be tied at all intersections. When 22 spacing is less than 1 foot, every other intersection shall be tied. If the Plans require 23 bundled bars, they shall be tied together with wires at least every 6 feet. All epoxy-coated 24 bars in the top mat of the bridge deck shall be tied at all intersections, however they may be 25 tied at alternate intersections when spacing is less than 1 foot in each direction and they 111 26 are supported by continuous supports meeting all other requirements of supports for epoxy- 27 coated bars. Other epoxy-coated bars shall also be tied at all intersections, but shall be tied 28 at alternate intersections when spacing is less than 1 foot in each direction. Wire used for 29 tying epoxy-coated reinforcing steel shall be plastic coated. Tack welding is not permitted I 30 on reinforcing steel. 31 32 Abrupt bends in the steel are permitted only when one steel member bends around 33 another. Vertical stirrups shall pass around main reinforcement or be firmly attached to it. 34 35 For slip-formed concrete, the reinforcing steel bars shall be tied at all intersections and 36 cross braced to keep the cage from moving during concrete placement. Cross bracing shall 37 be with additional reinforcing steel. Cross bracing shall be placed both longitudinally and 38 transversely. 39 111 40 After reinforcing steel bars are placed in a traffic or pedestrian barrier and prior to slip-form 41 concrete placement, the Contractor shall check clearances and reinforcing steel bar 42 placement. This check shall be accomplished by using a template or by operating the slip- 43 form machine over the entire length of the traffic or pedestrian barrier. All clearance and 44 reinforcing steel bar placement deficiencies shall be corrected by the Contractor before 45 slip-form concrete placement. , 46 47 Precast concrete supports (or other accepted devices) shall be used to maintain the 48 concrete coverage required by the Plans. The precast concrete supports shall: 49 50 1. Have a bearing surface measuring not greater than 2 inches in either dimension, and 51 , City of Everett Page AM-36 Amendments Everett Downtown Streetscape Improvement March 22, 2019