805Reinforcement

804.05 Basis of Payment. Concrete will be paid for at the contract unit price per cubic

yard for the class or classes specified, complete in place. Prestressed concrete beams and plank will be paid for at th e contract unit per linear foot of specified size and type. Prestressed concrete voided slab units and precas t caps will be paid for at the contract unit price per each for the specified types and sizes, complete in place and accepted, which price shall be full co mpensation for furnishing, hauling and erecting the members, including all prestressing reinforcement and other reinforcement in the members. Payment at the contract unit price shall be full compensation for furnishi ng all materials, equipment, tools, labor and incidentals n ecessary to complete the work. Payment will be made under: 804-A: Bridge Concrete, Class ____ - per cubic yard 804-B: Box Bridge Concrete, Class ___ - per cubic yard 804-C: Length Prestressed Concrete Beam, Type ___ - per linear foot 804-D: Length Prestressed Concrete Plank - per linear foot 804-E: Length Prestressed Concrete Voided Slab, Size Interior - per each 804-F: Length Prestressed Concrete Voided Slab, Size Exterior - per each 804-G: Length Precast Concrete Caps, End Unit with Wall - per each 804-H: Length Precast Concrete Ca ps, Intermediate Unit - per each SECTION 805 - REINFORCEMENT

805.01 Description. This work consists of furnishi ng and placing steel reinforcement for

bridges in accordance with these specifications and in reasonably close conformity with the dimensions, bending, spacing, and other requirements shown on the plans.

805.02 Materials. Materials used shall conform to the requirements of Section 711.

Supports for bar reinforcement shall meet the requirements of Subsection 711.02.7.

805.02.1 Order Lists. Before ordering reinforcement, all order lists and bending

diagrams shall be furnished by the Contractor for the approval of the Engineer, and no materials shall be ordered until the lists and bending diagrams have been approved. All expense incident to the revision of material furnished in accordance with such lists and diagrams to make it comply with the design drawings shall be borne by the Contractor.

805.03 Construction Requirements.

805.03.1 Protection of Material. Steel reinforcement shall be protected at all times from

damage. Damaged material will not be approved for use in the work. When placed in the work and immediately prior to placing the c oncrete, the reinforcement shall be free from dirt, oil, paint, grease, and other foreign substa nces and shall be free of loose or thick rust or millscale that could impair bond of the steel with the concrete.

805.03.2 Fabrication. Bent bar reinforcement shall be cold bent to the shapes shown on

the plans, and unless otherwise provided on the plans or by authorization, bends shall be made in accordance with Subsection 711.02. Bars partially embedded in concrete shall not be field bent except as shown on the plans or permitted. Bar reinforcement shall be bundled, tagged and marked in accordance with Code of Standard Practice of the Concre te Reinforcing Steel Institute.

805.03.3 Placing and Fastening. Reinforcement shall be accurately placed in the

positions shown on the plans and firmly held during the placing and setting of concrete. Bars shall be tied at all intersections. Where sp acing is less than one foot in each direction, alternate intersections shall be tied. Distances from the forms shall be maintained by means of stays, blocks, ties, hangers, or other approved supports. Blocks for holding reinforcement from contact with the forms shall be precast mortar blocks of approved shap e and dimensions or metal chairs, reference Subsection 711.02.7. Layers of bars shall be separated by precast mortar blocks or by other equally suitable devices. The use of pebbles, pieces of broken stone or brick, metal pipe, and wooden blocks will not be permitted. The clear distance between parallel bars, except in columns and between multiple layers of bars in beams, shall not be less than the nominal diameter of the bars, 1 1/3 times the maximum size of the coarse aggregate, nor one inch. Where reinforcement in beams or girders is placed in two or more layers, the clear distance between layers shall not be less than one inch , and the bars in the upper layers shall be placed directly above those in the bottom layer. In spirally reinforced and in tied columns, th e clear distance between longitudinal bars shall not be less than 1½ times the bar diameter, 1½ times the maximum size of the coarse aggregate, nor 1½ inches. The clear distance between bars shall also a pply to the clear distance between a contact splice and adjacent splices or bars. Reinforcement in any me mber shall be inspected and approved by the Engineer before the placing of concrete begins. Conc rete placed in violation of th is provision may be rejected and removal and replacement of conc rete and reinforcement required. If fabric reinforcement is shi pped in rolls, it shall be strai ghtened into flat sheets before being placed.

805.03.4 Splicing of Bars. All reinforcement shall be furnished in the full lengths

indicated on the plans. Exce pt when shown on th e plans, Splicing of bars will not be permitted without the written approval of the Engi neer. Splices shall be staggere d insofar as possible. The minimum distance to the surface of the conc rete shall be as specified on the plans. Reinforcement shall not be welded except if detailed on th e plans or if authorized by the Engineer in writing. Welding shall conf orm to the current AWS specifications for Recommended Practices for Weld ing Reinforcement Steel, Meta l Inserts, and Connections in Reinforced Conc rete Construction.

805.03.5 Lapping of Mesh or Mats. Sheets of mesh or bar mat reinforcement shall

overlap each other sufficiently to maintain a uniform strength and shall be securely fastened at the ends and edges. The edge lap sha ll not be less than one mesh in width.

805.03.6 Substitutions. Substitutions of different size ba rs will be permitted only with

specific authorization by the En gineer. If steel is substitu ted, it shall have an area equivalent to the design area or larger.

805.03.7 Epoxy Coated Bars.

805.03.7 1--Repair of Damaged Epoxy Coating. When required, damaged epoxy coating

shall be repaired with patching material conforming to ASTM A 775. Repair shall be done in accordance with the patching mate rial manufacturer’s recommendations.

805.03.7 2--Handling of Epoxy Coated Bars. The Contractor shall use padded or non-

metallic slings and padded straps to protect the coated reinforcement from damage. The bundled bars shall not be dropped or dragged an d must be stored on wooded cribbing. If, in the opinion of the Engineer, the coated bars or plates have been damaged as a result of the Contractor’s negligence, the material w ill be rejected. The Contractor may propose, for the approval of the Engineer , alternate precautionary measures.

805.03.7 3--Placing of Epoxy Coated Bars. Epoxy-coated reinforcing bars supported

from formwork shall rest on coated wire bar su pports, or on bar supports made of dielectric material or other acceptable materials. Wire bar supports shall be coated with dielectric material for a minimum distance of two inches from the poin t of contact with the epoxy- coated reinforcing bars. In walls having reinforcing bars, spreader bars where specified by the Engineer shall be epoxy coated. Propriet ary combination bar clip s and spreaders used in walls with epox y-coated reinforcing bars shall be ma de of corrosion resistant material. Epoxy-coated reinforcing bars shall be fastened with nylon-, epoxy-, or plastic-coated tie wire or other acceptable materials.

805.04 Method of Measurement. Steel reinforcement incorporated in bridge concrete

and accepted will be measured in pounds based on the total computed weight for the sizes and lengths of bars, mesh or mats shown on the plans or authorized . Reinforcement for box bridge concrete will be measured and paid for in accordance with Section 602. Epoxy coated reinforcement ba rs, not included in other pay items, will be measured in pounds based on the computed weight from th e theoretical weight of plain round bars of the same nominal size as shown in the ta ble of areas and masses in Section 711. Corrosion resistant reinforcement (CCR) bars , not included in other pay items, will be measured in pounds based on the computed weight from the theoretical weight of plain round bars of the same nominal size as shown in the table of areas and masses in Section 711. The weight of mesh will be computed from th e theoretical weight of plain wire. If the weight per square foot is given on the plan, that weight will be used. The weight of plain or deformed bars, or ba r mat, will be computed from the theoretical weight of plain round bars of the same nominal size as shown in the table of area and weights in Section 711. The weight for payment of structural steel re inforcement, incorporated in the work and accepted, will be the theoretical weight of the material used. The weight of reinforcement used in railings measured on a linear foot basis will not be measured. The weight of reinforcement in precast piles and other items where the reinforcement is included in the contract pric e will not be measured. No allowance will be made for clips, wire, sepa rators, wire chairs, an d other material used in fastening the reinforcement in place. If ba rs are substituted upon th e Contractor's request and as a result more steel is used than specif ied, only the bars specified will be measured. When splices, other than those shown on the plans, are made for the convenience of the Contractor, the extra steel will not be measured.

805.05 Basis of Payment. Reinforcement will be paid fo r at the contract unit price per

pound, which shall be full compensation for completing the work. Payment will be made under: 805-A: Reinforcement - per pound 805-B Reinforcement, Epoxy Coated - per pound 805-C Reinforcement, Corrosion Resistant - per pound SECTION 806 - PRECAST CONCRETE BRIDGE CAPS, SPANS AND WINGS

806.01 Description. This work consists of furnis hing and installing precast concrete

caps, precast concrete spans co mplete with post, bridge railing or concrete barrier rail and precast wings for bridges in accordance with th ese specifications and in reasonably close conformity with the dimensions and design i ndicated on the plans and placed on a prepared substructure to the lines and grad es established by the Engineer.

806.02 Materials. The materials used in this cons truction, in additi on to the general

requirements of these specifications, shall co nform, unless otherwise stipulated, to the requirements prescribed in Division 700, Material and Tests, for the particular kind and type of material specified.