SECTION 032000 - CONCRETE REINFORCING



This master should be used by designers working on Port of Portland construction projects and by designers working for PDX tenants (“Tenants”). Usage notes highlight a few specific editing choices, however the entire section should be evaluated and edited to fit specific project needs.

SECTION 032000 – CONCRETE REINFORCING

GENERAL

1. DESCRIPTION

A. This section describes concrete reinforcement.

2. RELATED WORK SPECIFIED ELSEWHERE

A. Section 031100, Concrete Formwork

B. Section 033000, Cast-In-Place Concrete

3. REFERENCES

A. ACI: American Concrete Institute:

1. ACI SP-66: ACI Detailing Manual.

2. ACI 318: Building Code Requirements for Structural Concrete and Commentary.

B. ASTM: American Society for Testing and Materials:

1. ASTM A82: Standard Specification for Steel Wire, Plain, for Concrete Reinforcement.

2. ASTM A185: Standard Specification for Steel Welded Wire Reinforcement, Plain, for Concrete.

3. ASTM A615: Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement.

4. SUBMITTAL OF SHOP DRAWINGS

A. Submit complete bar schedule, bar details, and erection drawings in accordance with ACI SP-66.

B. Show each type of bar marked with identification corresponding to identification tag on bar.

C. Erection drawings shall be clear and easily legible and to a minimum scale of:

Edit for manholes.

1. 1/4 inch - 1 foot.

2. 1/8 inch - 1 foot if bars in each face are shown on separate drawings.

D. Erection drawings shall show size and location of all openings.

5. REINFORCEMENT STEEL STORAGE

A. Store reinforcing steel blocked up off the ground and in orderly stacks.

B. Each stack shall only contain bars with the same identifying label.

PRODUCTS

1. MATERIAL

A. Reinforcement Bars:

1. No. 4, or larger, bars shall conform to ASTM A615, Grade 60.

2. No. 3 bars shall conform to ASTM A615, Grade 40.

B. Welded Wire Fabric: Conform to ASTM A185 using bright basic wire meeting ASTM A82.

C. Bolster, Chairs, and Accessories:

1. Conform to ACI SP-66.

2. Provide all spacers, bolsters, chairs, ties, and other devices necessary to properly space, place, support, and fasten reinforcement in place.

3. Metal accessories shall be galvanized or plastic-protected where legs will be exposed in finished concrete surfaces.

4. Do not use rocks, broken bricks, wood blocks, or concrete fragments for reinforcing support.

D. Testing: Perform at the mill for each heat. Submit certified test results, if required.

2. FABRICATION OF BARS

A. Fabricate with cold bends conforming to the recommended dimensions shown in ACI 318, Chapter 7.

B. Field fabrication will be allowed only if the Contractor has equipment to properly fabricate steel.

C. Attach metal tags for identification.

EXECUTION

1. PLACING METAL REINFORCEMENT

A. Place in accordance with ACI 318, Chapters 7 and 12.

B. Tie securely with 16-gauge or larger annealed iron wire.

C. Place steel with concrete cover in accordance with ACI 318, Chapter 7, Paragraph 7.7, unless otherwise indicated.

D. Splice steel not less than 30-bar diameter for ASTM A615, Grade 40, and 43-bar diameter for ASTM A615, Grade 60, unless otherwise indicated. For plain bars, splice not less than twice that for deformed bars.

E. Lap welded wire fabric not less than the length of one mesh.

END OF SECTION 032000

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