Document: NRC Regulatory Guide
Document ID: c64ed18e-c0e6-4b9a-8f77-2dc65c76782d
Document Type: regulatory_guide
Title: Concrete Placement in Category I Structures
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1306/ML13064A106.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.55
CFR Part: 
CFR Title: 

Content:
cement problems that might affect the structural or functional integrity of the structure. Field generated revisions should be approved by the designer. 3. Constructor. In addition-to the coordination noted above, preplanning by the constructor is necessary for: a. Cleanness-assuring cleanness of formed area prior to and during concrete placement, including access provisions for inspection and cleanout operations. b. Installations-installations of reinforcing bars, splices, embedded items, formwork, and construction joint barriers should be checked prior to placing concrete. c. Placement layout-practicality of construction joint locations, venting of potential air pockets to prevent voids, access to congested or confined areas, sequence of placement. d. Equipment-availability of proper equipment in good operating condition and in sizes and quantities needed (vibrators, chutes, etc.). Sufficient spares (parts or equipment) should be readily available so that loss or breakdown of equipment will not interrupt the placing of concrete and result in unplanned cold joints. e. Personnel-sufficient training and experience in the proper use' of all equipment (especially vibrators) involved in the placing of concrete. Also sufficient supervisory knowledge and experience to enable the concrete placement to be completed ih accordance with specifications. 1.55-2 APPENDIX BIBLIOGRAPHY OF USEFUL REFERENCES 1. ACI 318-71 Building Code Requirements for Reinforced Concrete (and Comraentary)-Chapter 5, "Mixing and Placing Concrete". 2. ACI 301-72 Specifications for Structural Concrete for Buildings. 3. ACI 305 72 Recommended Practice for Hot Weather Concreting. 4. ACI 306-66 Recommended Practice for Cold Weather Concreting. 5. ACI 308-71 Recommended Practice for Curing Concrete. 6. ACI 347-68 Recommended Practice for Concrete Formwork. 7. ACI 614-(Proposed Revision) Recommended Practice for Measuring, Mixing, Transporting and Placing Concrete. 8. ACI Special Publication No. 4-Formwork