806.01 DESCRIPTION. Furnish and place reinforcing steel for
reinforced concrete structures.
806.02 MATERIALS. Comply with Section 1009. Use accessories
compatible with the reinforcement.
806.03 FABRICATION. Fabricate reinforcement to the shapes shown
on the plans.
806.03.1 Bending: Cold bend reinforcement unless otherwise
permitted. Do not rebend bars. Special fabrication will be required for bending No. 14 and 18 bars more than 90 degrees. Bend bars around a pin having a diameter as specified in Table 806-1, unless otherwise specified: Table 806-1 Pins for Bar Bends Bar Size and Use Minimum Pin Diameter Nos. 3 through 5 – General Nos. 3 through 5 – Stirrups and Ties Nos. 6 through 8 – General Nos. 9, 10 and 11 Nos. 14 and 18 6.0 db 4.0 db 6.0 db 8.0 db 10.0 db db=bar diameter
806.03.2 Tolerances: Fabricate bars in accordance with the tolerances
specified in Table 806-2. All dimensions given in Table 806-2 are out-to-out of bars. Table 806-2 Fabrication Tolerances Symbol Tolerance (inches) 1/2 1 + 0, -1/2 1/2 *Not to differ for opposite parallel dimension by more than 1/2 inch. **Angular Deviation-Maximum 2 1/2° or 1/2 inch/ft., but no less than 1/2 inch.
806.03.3 Shipping: Ship in standard bundles, tagged, and marked in
accordance with the Manual of Standard Practice of the Concrete Reinforcement Steel Institute (CRSI). Make tags of durable material and legibly mark with waterproof markings. Attach at least one tag per bundle by wire. Show size of reinforcing, number of pieces, mark and length of bars on tags.
806.03.4 Handling and Coating Repairs:
Handle reinforcing steel without damaging the reinforcing steel or coatings. Repair coatings to bars damaged or cut during field operations before rusting occurs in accordance with the manufacturer's recommendations.
806.04 MATERIAL STORAGE. Store reinforcing steel above ground on
platforms, skids, or other supports to protect from damage and keep clean. At time of concrete placement, reinforcing steel shall be clean and damage free.
806.05 PLACING AND FASTENING. Provide reinforcing steel in the position
shown on the plans. Support reinforcing steel during placing and setting of forms and concrete. Additional bracing may be required to handle reinforcing cages to prevent damage. Additional bracing may be required to support and stabilize reinforcing cages to prevent damage or collapse. When placed in the work, reinforcement shall be free from dirt, loose rust, loose scale, paint, oil, grease, form release agent, or other foreign material. Thin powdery rust and light rust need not be removed. Do not field bend reinforcing steel unless specified on the plans or permitted by the engineer. Do not cut bars by burning. Tie reinforcing steel with wire adequate to support the construction loads including erection of reinforcing steel cages and placement of concrete. In no case use less than a No. 16 gauge wire. Tie reinforcing steel at all intersections. When bar spacing is less than 1 foot in each direction tie alternate intersections, except for drilled shafts which require all intersections of vertical and horizontal bars to be tied. Maintain distance of reinforcement from forms by use of metal chairs, ties, hangers, or other approved supports. Do not use pebbles, pieces of broken stone or brick, metal pipe, and wooden blocks as bar supports. Precast concrete blocks may be used when approved by the engineer in applications where concrete is to be placed against soil. When allowed, use concrete blocks meeting the requirements of the concrete placement. Repair damaged coatings on bar supports (chairs) and accessories in accordance with manufacturer’s recommendations before rusting occurs.
806.06 SPLICING. Furnish reinforcement bars un-spliced to the full lengths
indicated on the plans. Do not splice bars, except as indicated in the plans, without approval of the Engineer of Record. Maintain the minimum required clear distance to other bars and the specified concrete cover. Minimum required clear distance is three times the maximum aggregate size.
806.06.1 Lap Splices: Unless otherwise specified, provide lap splices in
accordance with the requirements of Table 806-3. Do not place a construction joint within the limits of the lap splice. In lapped splices, place bars in contact and tie together. Stagger splices by at least one lap splice length when locations are not shown in the plans.
806.06.2 Mechanical Splices: When shown in the plans, make reinforcing
steel splices with a mechanical splice listed in the AML and used in accordance with the manufacturer's recommendations. The mechanical splice shall develop in tension or compression, as required, at least 125 percent of the specified yield strength of the bars being spliced. Stagger mechanical splices to maintain proper minimum clear distances between bars and mechanical devices.
806.06.3 Welded Splices: Use welded splices only if detailed on the plans
or if authorized by the Engineer of Record. Welding shall comply with Section 809. Stagger splices as far as possible. Do not use welded splices on coated reinforcing steel. Table 806-3 Lap Splice Length for Grade 60 Steel Bar No. Lap Splice Length (inches)
806.07 MEASUREMENT. Quantities of deformed reinforcing steel will be the
design quantities as specified on the plans. Design quantities are based on theoretical weights in accordance with ASTM A615 as shown in Table 806-4: Table 806-4 Reinforcing Bar Weights Bar No. Weight Lb/Lin Ft 0.376 0.668 1.043 1.502 2.044 2.670 3.400 4.303 5.313 7.650 13.600 Measurement and payment of structural shapes used as reinforcement will be made in accordance with Section 807 Structural Metals on a lump sum basis. Measurement and payment of mechanical splices will be based per each. The following will not be measured for payment:
1.Reinforcement furnished for testing purposes.
2.Additional reinforcement used for laps in splices other than those shown on the plans.
3.Mechanical splices not shown on the plans.
4.Welded Splices.
5.Additional weight of reinforcement used at the contractor's request as substitutions for reinforcement shown on the plans.
6.Additional weight of reinforcement used for bracing and additional support.
7.Spacers, clips, bar supports (chairs), and other material used in installing reinforcement.
8.Additional weight of coating or cleaning and coating repair.
806.08 PAYMENT. Payment for reinforcing steel will include all labor,
materials, testing, and equipment required to complete the accepted item. Payment will be made at the contract unit price under: Item No. Pay Item Pay Unit 806-01 Deformed Reinforcing Steel Pound 806-02 Deformed Reinforcing Steel (Corrosion Resistant) Pound 806-03 Deformed Reinforcing Steel Mechanical Splice Each
Referenced in this section
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Source: Standard Specifications for Roads and Bridges, 2016 Edition. Pages 695–701 of 1,145. View official source ↗