274 SECTION 612
612.01 Description
This work consists of furnishing and placing reinforcing steel.
612.02 Equipment
Reserved.
612.03 Materials
Item Section Reinforcing Steel, Dowel Bars, and Tie Bars 836 Fabricate reinforcing steel in accordance with CRSI’s Manual of Standard Practice. Furnish reinforcing steel in the full length specified without using splices.
612.04 Construction Requirements
A.Bar List. Add a prefix to all bar designations to differentiate between the different structures on the same project.
B.Storage of Reinforcing Steel. Do not store reinforcing steel in direct contact with the ground. Incorporate reinforcement into the work only if it is free of deleterious material and detrimental scale or rust.
C.Field Bending. Do not field bend bars, unless specified. If field bending is specified, bend reinforcing bars cold.
D.Placing and Tying. Provide the Engineer 24 hours to inspect reinforcing steel before concrete placement. Tie bars at intersections unless the spacing is l ess than 12 inches in any direction, then only tie alternate intersections. Use 16 gauge non-corrosive wire ties. Do not weld, flame cut, or heat bars. Tie the top layer of transverse deck slab reinforcing steel to the shear connectors at each beam/girder line with two wraps of 16 gauge non-corrosive wire ties at a maximum longitudinal spacing of 6 feet. Anchor the top layer of transverse approach slab reinforcing steel to the ground using steel stakes at a maximum spacing of 7 feet in the longitudinal and transverse directions. Use bar supports that are made of plastic or metal. Use corrosion-proof legs if metal bar supports rest on the forms. Place bol sters and bar supports for deck slabs , approach slabs, and box culvert roof slabs at a maximum of 4 foot spacing. Tie bundled bars at 6 foot maximum spacing.
E.Epoxy Coated Reinforcing Steel. Pad equipment used to handle epoxy coated reinforcing bars where the equipment is in contact with the bars. Lift bundles of bars with multiple supports or a platform bridge to prevent abrasion in the bundle. Transport bundles without dropping or dragging. Do not expose bars to ultraviolet rays for 60 or more calendar days after fabrication, including the time the bars are placed before concrete placement. If covering the bars, provide ventilation to prevent condensation. The Engineer will reject bars if damage to the epoxy coating exceeds 2 percent of the surface area of the coated reinforcing bar in any 1 foot length. Repair remaining bars as according to ASTM D 3963. Remove rust before making repairs. The Engineer will reject bars if the patched area, excluding the cut ends, exceeds 5 percent of the surface area. Use plastic, plastic coated, or epoxy coated bar supports to support epoxy coated reinforcing bars. Use plastic coated wire for tying epoxy coated reinforcing bar.
612.05 Method of Measurement
The Engineer will measure as specified in Section 109.01, “Measurement of Quantities” and as follows: The Engineer will use Table 612-01 when calculating weights: Table 612 -01 Reinforcing Steel Weights Size Pounds per Linear Foot No. 3 0.376 No. 4 0.668 No.5 1.043 No.6 1.502 No.7 2.044 No.8 2.670 No.9 3.400 No.10 4.303 No.11 5.313 No.14 7.650 No.18 13.600
612.06 Basis of Payment
Pay Item Pay Unit Reinforcing Steel – Grade 60 Pounds Reinforcing Steel – Grade 60 – Box Culvert Pounds Reinforcing Steel – Grade 60 – Epoxy Coated Pounds 276 Such payment is full compensation for furnishing all materials, equipment, labor, and incidentals to complete the work as specified. Section 616 277 SECTION 616 STRUCTURAL STEEL
616.01 Description
The work consists of fabricating, furnishing, delivering and erecting structural steel. If structural steel is included in the contract as a “Lump Sum” item, verify the estimated weight of structural steel before submitting a proposal. The contract unit price for “Lump Sum” s tructural steel will only be revised if contract revisions are issued or authorized. No revisions will be made to the contract unit price of structural steel if the actual weight of the required structural steel varies from the estimated plan weight.
616.02 Equipment
Reserved.
616.03 Materials
Item Section Structural Steel and Related Materials 834 Three Coat Organic Zinc Rich Paint System 852.02 Use welded stud shear connectors meeting the requirements of AASHTO LRFD Bridge Construction Specifications , Section 11.3.3 and AASHTO/AWS D1.5 Bridge Welding Code, Clause 7. The Department does not require performance of the Charpy V -Notch test on structural steel used in the following locations: • Bearings ; • Bearing stiffeners; • Transverse web stiffeners; • Ice noses ; • Cross frames; • Gusset plates • Diaphragms ; • Transverse connection plates; • Deck drains; and • Barrier expansion plates .
616.04 Construction Requirements
A.Work Drawings. Submit work drawings for the fabrication and erection of steel. Show dimensions and sizes of materials for fabrication, bolt lists for field erection, a match-marking diagram, and a complete field erection plan. The Engineer’s review applies only to the requirements for strength, details and arrangements of parts and details.
Referenced in this section
Sections that cite this one
REINFORCING STEEL in other states
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Source: North Dakota Standard Specifications for Road and Bridge Construction, 2022 Edition. Pages 309–311 of 550. View official source ↗