555.01 Description
This work is furnishing, protecting, and placing reinforcing steel and wire fabric.
555.02 Materials
Furnish materials in accordance with the following subsection requirements: Epoxy-coated Reinforcing Bars ............................... 711.01.2 Reinforcing Steel ..................................................... 711.01.1 Wire and Wire mesh ................................................ 711.01.3 Use reinforcement listed on the QPL and in accordance with Section 711.
555.03 Construction Requirements
555.03.1 Protection of Material
Protect new and existing reinforcing steel from damage. The Project Manager will reject damaged material or allow a repair in accordance with ASTM A775 at Contractor expense. Handle epoxy-coated steel reinforcing with padded or nonmetallic slings and padded straps to prevent damage to the epoxy coating. Store reinforcing and supports on wooden blocks. Cover all reinforcing steel from weather exposure using an opaque moisture resistant covering that permits air circulation. Do not permit epoxy coated reinforcing steel to be exposed to sunlight in excess of 60 calendar days.
555.03.2 Fabrication
Bend reinforcing bar as specified in the contract. Bend all bars cold. Do not field bend bars partially imbedded in concrete unless otherwise specified. Meet Table 555-1 bend radii for standard hooks and all other bars other than stirrups and ties. Provide a minimum inside radii of 2 bar diameters for stirrups and ties. TABLE 555-1 MINIMUM BENDING RADII Bar Size Minimum Inside Radii 3 thru 8 (#10 thru #25) 3 bar diameters 9 thru 11 (#30 thru #35) 4 bar diameters 14 or 18 (#45 or #55) 5 bar diameters Obtain approval for special fabrication or bends exceeding 90° for No’s. 14S and 18S reinforcing steel. Ship reinforcing bar in bundles tagged and marked in accordance with the Concrete Reinforcement Steel Institute Code of Standard Practice. Submit fabrication drawings when specified or requested.
555.03.3 Placing and Fastening
Place the reinforcing steel as shown in the contract and hold in place during concrete work. Submit a written request for approval to weld reinforcing steel to hold in place or fasten. Include in the request ANSI/AWS procedures to be used. 555 – REINFORCING STEEL 2020 EDITION V5.1 555-2 Ensure steel reinforcing is free of loose rust and scale, dirt, paint, oil, or other foreign material. Verify the anchor bolt clearances before placing reinforcing steel. Tie bars at all intersections unless bar spacing is less than 1-foot (305 mm) in each direction, which requires alternate intersections be tied. Provide the minimum cover for reinforcing bars shown in Table 555-2. TABLE 555-2 REBAR COVER Bar Location Cover Top of Slab 2½ inches (60 mm) Bottom of Slab 1-inch (25 mm) Stirrups and Ties 1½ inches (38 mm) Footing and Pier Shafts 3 inches (75 mm) Separate forms using stays, ties, hangers, metal chairs, blocks, or other approved supports. Precast mortar blocks may be used at locations approved by the Project Manager, excluding supports for bridge deck slab reinforcing steel. Use blocks precast from concrete used on the project and water cured for 7 days before use. Use blocks of the size specified having an embedded wire for fastening to the reinforcing bar. Separate bar layers using precast mortar blocks, upper continuous metal chairs, or other approved devices. Separate the upper and lower mats of reinforcing steel for deck slabs, depending upon the vertical distance between the mats, using “Upper Continuous High Chair” or “Slab Bolsters with Runners”. Place Continuous bar supports at right angles to structure centerline for “Flat Slab” structures and parallel to structure centerline for all other deck slabs. Do not use pebbles, pieces of broken stone, concrete rubble, broken brick or building blocks, metal pipe, or wooden blocks. Use metal chairs and supports contacting epoxy-coated bars that are epoxy coated or coated with another inert approved coating. Use plastic-coated tie wires or tie wires coated with another inert coating approved by the Project Manager to tie the coated bars in place. Space deck slab reinforcing supports a maximum 4 feet (1.2 m). Space supports closer, if necessary, to prevent deflection during placement of concrete. Obtain approval of reinforcing placement before placing concrete. Remove concrete placed before inspection. Flatten rolled reinforcing fabric into sheets before placing.
555.03.4 Splicing
Furnish all reinforcing steel in the specified lengths. Splice as shown in the contract or as directed.
555.03.5 Reinforcing Steel - Material Guaranty and Random Sampling
Furnish the following for each shipment of reinforcing steel delivered to the project:
1.Shipping invoice showing the weight and price per pound (kg) of all the steel in the shipment. 2020 EDITION V5.1 REINFORCING STEEL – 555 555-3
2.A statement from the final fabricator identifying the size, grade, and type of steel supplied and certifying the steel furnished meets the contract requirements for quality and Domestic Materials.
3.For epoxy-coated reinforcing bars, the coating applicator must furnish with each shipment a certificate of compliance confirming that the coated reinforcing bars were cleaned, coated, and tested in accordance with ASTM A775 and Subsection 106.09
4.The name and location of the original source (Mill) of the steel and epoxy coater, if applicable, in accordance with Subsection 711.01 . A shipment is the quantity of reinforcing steel in each truckload delivered to the project. When delivery is by railroad car, each 20 tons (18.1 MT), or fraction thereof, is a shipment. The Department reserves the right to sample and test rebar. Furnish samples as requested for testing. If samples are requested, do not place concrete until the steel test results are known. If a reinforcing steel sample fails, 2 additional samples representing the failed sample will be tested. If either of the check samples fails, the steel in the shipment represented by the failing sample may be rejected; or if the Project Manager determines that the steel is usable, a price reduction will be assessed as follows: P = A x B Where: A = Total invoice price of reinforcing steel in the lot B = 10%, 20%, or 30%, dependent upon departure from specifications; the value to be used will be determined by the Project Manager P = Price reduction for the lot Notes:
1.A lot is defined as all the bars of one bar number and pattern of deformation contained in an individual shipment. The amount of reduction calculated above will be deducted from monies due the Contractor on the final estimate. Remove and replace all rejected steel at Contractor expense. Furnish invoice statements, mill reports, and fabrication certificates for replacement steel. Replacement steel is subject to the requirements specified above. Reinforcing steel shipments will not be accepted until the test results are known. The Contractor may proceed with the work at its own risk before testing.
555.04 Method of Measurement
The reinforcing steel quantity in the contract is the calculated theoretical weight of the steel in pounds (kg), measured as shown in the contract or ordered in writing, complete in place and accepted. Plan quantities will not be re-measured except as provided for in Subsection 555.05 . The weights of standard sizes of reinforcing bars in accordance with AASHTO M 31 are computed using Table 555-3. 555 – REINFORCING STEEL 2020 EDITION V5.1 555-4 TABLE 555-3 WEIGHTS OF STANDARD SIZES OF REINFORCING BARS Bar Size English (metric) Bar Diameter inch (mm) Weight lb./ft (kg/m) No. 3 (#10) 0.375 (9.5) 0.376 (0.560) No. 4 (#13) 0.500 (12.7) 0.668 (0.994) No. 5 (#16) 0.625 (15.9) 1.043 (1.552) No. 6 (#19) 0.750 (19.1) 1.502 (2.235) No. 7 (#22) 0.875 (22.2) 2.044 (3.042) No. 8 (#25) 1.000 (25.4) 2.670 (3.973) No. 9 (#29) 1.128 (28.7) 3.400 (5.060) No. 10 (#32) 1.270 (32.3) 4.303 (6.404) No. 11 (#36) 1.410 (35.8) 5.313 (7.907) No. 14 (#43) 1.693 (43.0) 7.650 (11.38) No. 18 (#57) 2.257 (57.3) 13.600 (20.24) Non-standard reinforcing bars or wire fabric, when required, have the unit weight specified in the contract. No allowance is made for clips, wires, separators, or other material used for fastening or supporting the reinforcing steel.
555.05 Basis of Payment
Payment for the completed and accepted quantities is made under the following: Pay Item Pay Unit Reinforcing Steel Pound (kg) Reinforcing steel is paid in place for the quantities shown in the contract, except as follows:
1.The calculated quantities involved in changes ordered in writing by the Project Manager are added or deducted from the plan quantities.
2.A recalculation will be made, and the corrected quantity will be included for payment, in lieu of the plan quantity, when the plan quantity of reinforcing steel in any complete structure is in error by 5% or more. A complete structure is the smallest portion of a total structure for which a quantity is included in the contract. The party to the contract requesting an adjustment must present to the other party the description, location and recalculated quantities of the structure having the quantity error. Partial payments for reinforcing steel will be made based on the contract quantity as follows:
1.85% when the material is accepted, placed, and tied.
2.100% when covered with concrete.
Referenced in this section
Reinforcing Steel in other states
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Source: Standard Specifications for Road and Bridge Construction, 2020 (v5.1) Edition. Pages 351–354 of 611. View official source ↗