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SECTION 1907A DETAILS OF REINFORCEMENT

1907A.1 Hooks.


Standard hooks on reinforcing bars used in concrete construction shall comply with ACI 318, Section 7.1.

1907A.2 Minimum bend diameters.


Minimum reinforcement bend diameters utilized in concrete construction shall comply with ACI 318, Section 7.2.

1907A.3 Bending.


The bending of reinforcement shall comply with ACI 318, Section 7.3.

1907A.4 Surface conditions of reinforcement.


The surface conditions of reinforcement shall comply with the provisions of ACI 318, Section 7.4.

1907A.5 Placing reinforcement.


The placement of reinforcement, including tolerances on depth and cover, shall comply with the provisions of ACI 318, Section 7.5. Reinforcement shall be accurately placed and adequately supported before concrete is placed.

1907A.5.1 Prestressing tendons.


Prestressing tendons shall be placed within plus or minus ¼-inch (6.4 mm) tolerance for member depths equal to and less than 8 inches (203 mm) and not to exceed the lesser of  3/8 inch (9.5 mm) or one third the minimum concrete cover for member depths greater than 8 inches (203 mm).


1907A.6 Spacing limits for reinforcement.


The clear distance between reinforcing bars, bundled bars, tendons and ducts shall comply with ACI 318, Section 7.6.

1907A.7 Concrete protection for reinforcement.


The minimum concrete cover for reinforcement shall comply with Sections 1907A.7.1 through 1907A.7.7.

1907A.7.1 Cast-in-place concrete (nonprestressed).


Minimum concrete cover shall be provided for reinforcement in nonprestressed, cast-in-place concrete construction in accordance with ACI 318, Section 7.7.1.

Concrete tilt-up panels cast against a rigid horizontal surface, such as a concrete slab, exposed to the weather shall have 1-inch (25 mm) concrete cover for No. 8 or smaller bar and 2-inches (51 mm) cover for No. 9 or larger bars.


1907A.7.2 Cast-in-place concrete (prestressed).


The minimum concrete cover for prestressed and nonprestressed reinforcement, ducts and end fittings in cast-in-place prestressed concrete shall comply with ACI 318, Section 7.7.2.

1907A.7.3 Precast concrete (manufactured under plant control conditions).


The minimum 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 7.7.3.

1907A.7.4 Bundled bars.


The minimum concrete cover for bundled bars shall comply with ACI 318, Section 7.7.4.

1907A.7.5 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 7.7.5.

1907A.7.6 Future extensions.


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

1907A.7.7 Fire protection.


When this code requires a thickness of cover for fire protection greater than the minimum concrete cover specified in Section 1907A.7, such greater thickness shall be used.

1907A.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 7.8.

1907A.9 Connections.


Connections between concrete framing members shall comply with the provisions of ACI 318, Section 7.9.

1907A.10 Lateral reinforcement for compression members.


Lateral reinforcement for concrete compression members shall comply with the provisions of ACI 318, Section 7.10.

1907A.11 Lateral reinforcement for flexural members.


Lateral reinforcement for compression reinforcement in concrete flexural members shall comply with the provisions of ACI 318, Section 7.11.

1907A.12 Shrinkage and temperature reinforcement.


Reinforcement for shrinkage and temperature stresses in concrete members shall comply with the provisions of ACI 318, Section 7.12.

1907A.13 Requirements for structural integrity.


The detailing of reinforcement and connections between concrete members shall comply with the provisions of ACI 318, Section 7.13, to improve structural integrity.