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The work covered by this section consists of furnishing, fabricating, and placing steel reinforcement in conformity with the shape and dimensions shown on the plans and as specified in these specifications. When so indicated on the plans reinforcing steel shall be epoxy coated.
All materials shall meet the requirements of Division 10 shown below:
Steel bar reinforcement Article 1070-2
Wire mesh reinforcement Article 1070-3
Reinforcing wire Article 1070-3
Wire bar supports Article 1070-4
Epoxy Coated Reinforcing Steel Article 1070-8
425-3 PROTECTION OF MATERIALS.
Steel reinforcement shall be protected at all times from damage and when placed in the work shall be free from dirt, dust, loose mill scale, loose rust, paint, oil, or other foreign materials.
Epoxy coated reinforcing steel bars shall be stored at the project site a minimum of 1 foot above the ground on wooden or padded supports placed 10 feet apart, and completely covered with opaque cloth, canvas, or woven fiber reinforced polyethylene tarp. The bars are to be covered such that adequate ventilation will be provided to prevent condensation from forming on the material during storage, and the bars are completely protected from direct sunlight.
The Contractor shall store epoxy coated bars as close as possible to the area where they will be placed in the structure to prevent coating damage from unnecessary handling.
Epoxy coated bars shall not be stored at the project site from one construction season until the following construction season unless stored in a waterproof enclosure.
Reinforcement shall be accurately placed as shown on the plans and shall be firmly and securely held in position by wiring at intersections and by using metal bar supports, precast mortar blocks, or other approved devices of sufficient strength and location to resist distortion.
Reinforcing bars shall be tied at all intersections except where spacing is less than 1 foot in both the longitudinal and transverse directions, in which case tying at alternate intersections will be permitted.
Wire bar supports shall be provided for reinforcing steel where indicated on the plans. The supports shall be of the proper height to provide the distance from the forms and the proper spacing between rows of steel shown on the plans. Supporting legs for wire bar supports which are to rest on the forms shall be rust-proofed as provided in Article 10704. When rust proofing is provided by plastic protection, the dipped plastic coating or premolded plastic tips shall be intact on each bar support leg at the time the concrete is being placed.
Blocks for holding vertical reinforcement in position shall be precast from 1:2 mortar or concrete of the same mix used in the member being cast, and be of approved shape and dimensions. Precast blocks shall be cured in accordance with the provisions of Article 42016 for the water method or the polyethylene sheeting method. Precast blocks used to hold vertical bars in position shall have embedded wires extending from the block a sufficient distance to tie to the bar.
Mesh reinforcement shall be rolled flat before placing concrete, unless otherwise shown on the plans. Mesh reinforcement shall be held firmly in place against vertical and transverse movement by means of devices satisfactory to the Engineer.
Welding reinforcing steel shall be performed in accordance with the American Welding Society's "Reinforcing Steel Welding Code AWS D1.4". Welding shall be done only where shown on the plans or where called for in the special provisions unless the Contractor has requested and received written approval from the Engineer for additional welding. Tack welds will not be permitted unless approved by the Engineer.
The Contractor shall exercise extreme care when transporting, handling, placing and tying epoxy coated reinforcing steel to prevent damaging the coating.
Immediately before placing epoxy coated reinforcing steel bars in the forms, the Contractor shall visually inspect each bar for coating damage. The Contractor will be responsible for determining that all coating damaged by any cause is satisfactorily repaired, including hairline cracks and that each bar, including bar ends, is completely encapsulated in epoxy coating or patching material at the time of concrete placement. Coating repairs shall be made as described in Section 10708(K) with material specified in Section 10708(C). The total damaged surface area on each bar that is coated with patching material shall not exceed 5 percent. This includes patching due to damage to the coating by the coater, fabricator, transporter, and contractor. The patching limits do not include holiday repairs, overspray and coated ends of bars.
Except for barrier rail reinforcing steel, no epoxy coated reinforcing steel shall remain exposed to the weather for more than 30 days after placement in the forms. If the concrete has not been placed within 30 days, the epoxy coated reinforcing steel shall be covered as required by Article 4253.
The placing of reinforcement during the placing of concrete in the member involved will not be permitted.
Reinforcement in any member shall be placed and shall have been inspected and approved by the Engineer before the placing of concrete begins.
All reinforcement shall be furnished in the full lengths indicated on the plans.
The splicing of bars will not be permitted without the written approval of the Engineer except where shown on the plans.
Splice lengths shall be as shown on the plans.
Sheets of mesh shall overlap each other sufficiently to maintain a uniform strength and shall be securely fastened to each other at the ends and edges. The lap shall be at least the dimension of 1 mesh.
The quantity of reinforcing steel to be paid for will be the number of pounds of steel bar reinforcement, reinforcing wire, and plain rods shown on the plans as being necessary to complete the work. Where the plans have been revised, the quantity to be paid for will be the quantity shown on the revised plans. Where the Engineer directs the Contractor to deviate from the plans in such a manner to change the quantities of steel bar reinforcement, reinforcing wire, and plain rods necessary to complete the project, the quantity shown on the plans will be increased or decreased by the theoretical computed weight of reinforcing steel added or subtracted by the change.
The quantity of reinforcing steel, determined as provided in Article 4256, will be paid for at the contract unit price per pound for "Reinforcing Steel". The quantity of reinforcing steel shown on the plans is an estimate based on the theoretical computed weight of the reinforcing steel necessary to complete the work, and will be used for pay purposes. No revision in this pay quantity nor any adjustment in the contract unit price for "Reinforcing Steel" will be made except where revisions in the plans affect the quantity of reinforcing steel necessary to complete the work or where an error has been found in the estimate of reinforcing steel shown on the plans.
In the event that the elevation of the top of a footing is raised by a distance not exceeding 3 feet, and the reinforcing steel for the substructure unit has been fabricated before the elevation was raised, no decrease in the quantity of reinforcing steel to be paid for will be made from the theoretical weight of steel shown on the plans for the original substructure unit. Under the above circumstances the provisions of Article 1096 will not apply as the reinforcing steel not used in the work shall remain the property of the Contractor and payment for such reinforcing steel will be made as provided above. No separate payment will be made for the cost of cutting off reinforcing bars as payment at the contract unit price per pound for the item of "Reinforcing Steel" will be full compensation for cutting off the reinforcing bars.
There will be no direct payment for reinforcing steel when the basis of payment or compensation clause applicable to a particular section of the specifications states that payment at the contract unit or lump sum prices for the work covered by such section will be full compensation for furnishing and placing reinforcing steel.
The above price and payment will be full compensation for all work of furnishing and placing steel reinforcing other than wire mesh reinforcement, including but not limited to furnishing reinforcing steel and all related materials such as tie wire, separators, wire bar supports, and other material for fastening the reinforcing steel in place; galvanizing and/or coating where called for; and fabricating, cutting, bending, placing, and splicing the reinforcement.
No separate payment will be made for the work of furnishing and placing wire mesh reinforcement as payment at the contract unit price for the item or items covering the structure containing the mesh reinforcement will be full compensation for such work.
Payment will be made under:
Reinforcing Steel Pound
Epoxy Coated Reinforcing Steel Pound