Section 03212 REINFORCING BAR COUPLERS

Section 03212

_{REINFORCING BAR COUPLERS}

PART 1 - GENERAL

1.1 THE REQUIREMENT

A. The CONTRACTOR shall furnish and install all reinforcing bar couplers.

1.2 REFERENCES

A. American Society of Testing and Materials (ASTM):

A 615 Specification for Deformed and Plain Billet-Steel Bars for

Concrete Reinforcement

A 706 Specification for Low-Alloy Steel Deformed Bars for Concrete

Reinforcement

1.3 SYSTEM DESCRIPTION

A. Performance Requirements:

1. Do not exceed the following total slip of the reinforcing bars within the splice sleeve after loading reinforcing bar in tension to 30,000 pounds per square inch and relaxing to 3,000 pounds per square inch, measured between gauge points clear of the splice sleeve:

a. 0.010 inch for Number 14 reinforcing bars or smaller. b. 0.030 inch for Number 18 reinforcing bars.

1.4 SUBMITTALS

A. Submit the Following Information for Each Shipment of Splice Material:

1. The type or series identification of the splice material. For sleeve-threaded type, the heat treatment lot number.

2. The bar grade and size number to be spliced by the material.

3. A copy of the manufacturer's catalog giving complete data on the splice material and procedures.

4. A statement that the splicing systems and materials used in accordance with the manufacturer's procedures will develop not less than the minimum tensile strengths, based on the nominal bar area, of 63,000 pounds per square inch for ASTM A 615, Grade 40 bars and 80,000 pounds per square inch for ASTM A 615, Grade 60 and ASTM A 706 bars, and will comply with the total slip requirements and the other requirements in these Specifications.

PART 2 - PRODUCTS

2.1 MATERIALS

A. Reinforcing Bar Couplers: Mechanical butt splices of the sleeve-threaded type or the sleeve-swaged type, at the option of the CONTRACTOR.

1. Sleeve-threaded Type of Reinforcing Bar Coupler:

a. Steel splice sleeve with tapered interior threads that joins the reinforcing bars with matching tapered threads.

b. Taper threads to such a degree that cross threading will not occur during assembly.

c. Mark each splice sleeve with the heat treatment lot number.

d. After completion of assembly of the splice, tighten splice to a torque value of not less than 200 foot pounds for all bar sizes.

2. Sleeve-swaged type of reinforcing bar coupler: Seamless steel sleeve applied over the ends of the reinforcing bars and swaged to the bars by means of a hydraulic press.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Use reinforcing bar couplers where indicated on the Drawings or accepted by the

ENGINEER.

B. Splice in accordance with the manufacturer's recommendations, except as modified in this section. Make splices using manufacturer's standard equipment, jigs, clamps, and other required accessories.

C. Cut ends of reinforcing bars to be spliced nominally square.

D. Provide clear cover over reinforcing bar couplers of not less than indicated on the Drawings or specified for the bars when measured from the surface of the concrete to the outside of the sleeve. Adjust stirrups, ties, and other reinforcement and place additional reinforcement if necessary to provide planned clear cover over reinforcement.