N.Y.C. Admin. Code § BC 1907: Section BC 1907: Details of Reinforcement

1907.1 Hooks.

Standard hooks on reinforcing bars used in concrete construction shall comply with ACI 318, Section 25.3.

1907.2 Minimum bend diameters.

Minimum reinforcement bend diameters utilized in concrete construction shall comply with ACI 318, Section 25.3.2.

1907.3 Bending.

The bending of reinforcement shall comply with Sections 1907.3.1 and 1907.3.2.

1907.3.1 Cold bending.

Reinforcement shall be bent cold, unless otherwise permitted by the registered design professional of record.

1907.3.2 Embedded reinforcement.

Reinforcement partially embedded in concrete shall not be field bent, except as shown on the construction documents or permitted by the registered design professional of record.

1907.4 Surface conditions of reinforcement.

The surface conditions of reinforcement shall comply with the provisions of Sections 1907.4.1 through 1907.4.3.

1907.4.1 Coatings.

At the time concrete is placed, reinforcement shall be free from mud, oil or other nonmetallic coatings that decrease bond. Zinc and epoxy-coating of steel reinforcement in accordance with ACI 318, Section 20.6.2 shall be permitted.

1907.4.2 Rust or mill scale.

Except for prestressing reinforcement, steel reinforcement with rust, mill scale or a combination of both, shall be permitted, provided the minimum dimensions, including height of deformations and weight of a hand-wire-brushed test specimen, comply with applicable ASTM specifications specified in Section 1903.6.

1907.4.3 Prestressing reinforcement.

Prestressing reinforcement shall be clean and free of oil, dirt, scale, pitting and excessive rust. A light coating of rust is permitted.

1907.5 Placing reinforcement.

The placement of concrete reinforcement shall comply with the provisions of Sections 1907.5.1 through 1907.5.4.

1907.5.1 Support.

Reinforcement, including tendons, and posttensioning ducts shall be accurately placed and adequately supported before concrete is placed, and shall be secured against displacement within tolerances permitted in Section 1907.5.2. Where approved by the registered design professional of record, embedded items (such as dowels or inserts) that either protrude from precast concrete members or remain exposed for inspection are permitted to be embedded while the concrete is in a plastic state, provided the following conditions are met:

1. Embedded items are maintained in the correct position while the concrete remains plastic.

2. The concrete is properly consolidated around the embedded item. Embedded items are not required to be hooked or tied to reinforcement within the concrete.

1907.5.2 Tolerances.

Unless otherwise specified by the registered design professional of record, reinforcement, including tendons, and posttensioning ducts shall be placed within the tolerances specified in Sections 1907.5.2.1 and 1907.5.2.2.

1907.5.2.1 d and cover.

Tolerance for d and concrete cover shall be as required in ACI 318, Section 26.6.2.1(a).

1907.5.2.2 Bends and ends.

Tolerance for longitudinal location of bends and ends of reinforcement shall be as required by ACI 318, Section 26.6.2.1(b).

1907.5.3 Welded wire reinforcement.

Welded wire reinforcement with wire size not greater than W5 or D5 used in slabs not exceeding 10 feet (3048 mm) in span is permitted to be curved from a point near the top of the slab over the support to a point near the bottom of the slab at midspan, provided such reinforcement is either continuous over, or securely anchored at support.

1907.5.4 Welding.

Welding of crossing bars shall not be permitted for assembly of reinforcement unless authorized by the registered design professional of record.

1907.6 Minimum spacing of reinforcement.

The clear distance between reinforcing bars, bundled bars, tendons and ducts shall comply with ACI 318, Section 25.2.

1907.7 Concrete protection for reinforcement.

The minimum concrete cover for reinforcement shall comply with Sections 1907.7.1 through 1907.7.8.

1907.7.1 Cast-in-place concrete (nonprestressed).

Minimum specified concrete cover shall be provided for reinforcement in nonprestressed cast-in-place concrete construction in accordance with ACI 318, Section 20.6.1.3.1, but shall not be less than required by Sections 1907.7.6 and 1907.7.8 of this code.

1907.7.2 Cast-in-place concrete (prestressed).

The minimum specified concrete cover for prestressed and nonprestressed reinforcement, ducts and end fittings in cast-in-place prestressed concrete shall comply with ACI 318, Section 20.6.1.3.2.

1907.7.3 Precast concrete (manufactured under plant control conditions).

The minimum specified concrete cover for prestressed and nonprestressed reinforcement, ducts and end fittings in precast concrete manufactured under plant control conditions shall comply with ACI 318, Section 20.6.1.3.3.

1907.7.4 Bundled bars.

The minimum specified concrete cover for bundled bars shall comply with ACI 318, Section 20.6.1.3.4.

1907.7.5 Headed shear stud reinforcement.

For headed shear stud reinforcement, the minimum specified concrete cover shall comply with ACI 318, Section 20.6.1.3.5.

1907.7.6 Corrosive environments.

In corrosive environments or other severe exposure conditions, prestressed and nonprestressed reinforcement shall be provided with additional protection in accordance with ACI 318, Section 20.6.1.4.

1907.7.7 Future extensions.

Exposed reinforcement, inserts and plates intended for bonding with future extensions shall be protected from corrosion.

1907.7.8 Fire protection.

When this code requires a thickness of cover for fire protection greater than the minimum concrete cover in Section 1907.7, such greater thickness shall be specified on the construction documents.

1907.8 Special reinforcement details for columns.

Offset bent longitudinal bars in columns and load transfer in structural steel cores of composite compression members shall comply with the provisions of ACI 318, Section 10.7.4.

1907.9 Connections.

Connections between concrete framing members shall comply with the provisions of ACI 318, Chapters 15 and 16.

1907.10 Transverse

reinforcement for compression members. Transverse reinforcement for compression members shall comply with the provisions of ACI 318, Section 25.7.2.

1907.11 Transverse reinforcement for flexural members.

Transverse reinforcement for compression reinforcement in flexural members shall comply with the provisions of ACI 318, Section 25.7.1.

1907.12 Shrinkage and temperature reinforcement.

Reinforcement for shrinkage and temperature stresses in concrete members shall comply with the provisions of ACI 318, Section 24.4.

1907.13 Requirements for structural integrity.

The detailing of reinforcement and connections between concrete members shall comply with the provisions of ACI 318, Section 4.10 and Section 1912 of this code.