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I <br /> 1 coated bars. Other epoxy-coated bars shall also be tied at all intersections, but shall be tied <br /> 2 at alternate intersections when spacing is less than 1 foot in each direction. Wire used for <br /> 3 tying epoxy-coated reinforcing steel shall be plastic coated. Tack welding is not permitted <br /> I <br /> 4 on reinforcing steel. <br /> 5 <br /> 6 Abrupt bends in the steel are permitted only when one steel member bends around <br /> I <br /> 7 another. Vertical stirrups shall pass around main reinforcement or be firmly attached to it. <br /> 8 <br /> 9 For slip-formed concrete, the reinforcing steel bars shall be tied at all intersections and <br /> 10 cross braced to keep the cage from moving during concrete placement. Cross bracing shall <br /> 11 be with additional reinforcing steel. Cross bracing shall be placed both longitudinally and <br /> 12 transversely. <br /> 13 <br /> 14 After reinforcing steel bars are placed in a traffic or pedestrian barrier and prior to slip-form <br /> 15 concrete placement, the Contractor shall check clearances and reinforcing steel bar <br /> 16 placement. This check shall be accomplished by using a template or by operating the slip- <br /> 17 form machine over the entire length of the traffic or pedestrian barrier. All clearance and <br /> 18 reinforcing steel bar placement deficiencies shall be corrected by the Contractor before <br /> 19 slip-form concrete placement. <br /> 20 <br /> I <br /> 21 Precast concrete supports (or other accepted devices) shall be used to maintain the <br /> 22 concrete coverage required by the Plans. The precast concrete supports shall: <br /> 23 <br /> I <br /> 24 1. Have a bearing surface measuring not greater than 2 inches in either dimension, and <br /> 25 <br /> 26 2. Have a compressive strength equal to or greater than that of the concrete in which <br /> 27 they are embedded. <br /> 28 <br /> 29 In slabs, each precast concrete support shall have either: (1) a grooved top that will hold <br /> 30 the reinforcing bar in place, or (2) an embedded wire that protrudes and is tied to the <br /> 31 reinforcing steel. If this wire is used around epoxy-coated bars, it shall be coated with <br /> 32 plastic. <br /> 33 <br /> 34 Precast concrete supports may be accepted based on a Manufacturer's Certificate of <br /> 35 Compliance. <br /> 36 <br /> 37 In lieu of precast concrete supports, the Contractor may use metal or all-plastic supports to <br /> 38 hold uncoated bars. Any surface of a metal support that will not be covered by at least 1/2 <br /> 39 inch of concrete shall be one of the following: <br /> 40 <br /> 41 1. Hot-dip galvanized after fabrication in keeping with AASHTO M232 Class D; <br /> 42 <br /> 43 2. Coated with plastic firmly bonded to the metal. This plastic shall be at least 3%32 I <br /> 44 inch thick where it touches the form and shall not react chemically with the <br /> 45 concrete when tested in the State Materials Laboratory. The plastic shall not <br /> 46 shatter or crack at or above -5°F and shall not deform enough to expose the metal <br /> 47 at or below 200°F; or <br /> 48 <br /> 49 3. Stainless steel that meet the requirements of ASTM A493, Type 302. Stainless <br /> 50 steel chair supports are not required to be galvanized or plastic coated. <br /> 51 <br /> City of Everett Page AM-40 Amendments <br /> I <br /> Everett Station 80 Stall Parking Expansion June 2019 <br /> I <br />