ACI 349M-06

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This standard covers the proper design and construction of concrete structures that form part of a nuclear power plant and that have nuclear safety-related functions, but does not cover concrete reactor vessels and concrete containment structures (as defined by Joint ACI-ASME Committee 359).

The structures covered by the Code include concrete structures inside and outside the containment system. This Code may be referenced and applied subject to agreement between the owner and the Regulatory Authority.

All notation sections have been removed from the beginning of each chapter and consolidated into one list in Chapter 2.

The format of this Code is based on the Building Code Requirements for Structural Concrete (ACI 318-05) and incorporates recent revisions of that standard.

The commentary, which is presented after the Code, discusses some of the considerations of ACI Committee 349 in developing Code Requirements for Nuclear Safety-Related Concrete Structures (ACI 349-06).This information is provided in the commentary because the Code is written as a legal document and therefore cannot present background details or suggestions for carrying out its requirements.



Keywords: 349M06

This product is related to: ACI 349-06 - Code Requirements for Nuclear Safety-Related Concrete Structures and Commentary (Metric)

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Chapter 1--General requirements, p. 349M-6
1.1--Scope1.2--Drawings and specifications1.3--Inspection1.4--Approval of special systems of design or construction1.5--Quality assurance program
Chapter 2--Notation and definitions, p. 349M-7
2.1--Code notation2.2--Definitions
Chapter 3--Materials, p. 349M-17
3.1--Tests of materials3.2--Cements3.3--Aggregates3.4--Water3.5--Steel reinforcement3.6--Admixtures3.7--Storage and identification of materials3.8--Referenced standards
Chapter 4--Durability requirements, p. 349M-21
4.1--Water-cementitious material ratio4.2--Freezing and thawing exposures4.3--Sulfate exposures4.4--Corrosion protection of reinforcement
Chapter 5--Concrete quality, mixing, and placing, p. 349M-22
5.1--General5.2--Selection of concrete proportions5.3--Proportioning on the basis of field experience or trialmixtures, or both5.4--Proportioning without field experience or trial mixtures5.5--Average compressive strength reduction5.6--Evaluation and acceptance of concrete5.7--Preparation of equipment and place of deposit5.8--Mixing5.9--Conveying5.10--Depositing5.11--Curing5.12--Cold weather requirements5.13--Hot weather requirements
Chapter 6--Formwork, embedded pipes, and construction joints, p. 349M-26
6.1--Design of formwork6.2--Removal of forms, shores, and reshoring6.3--Conduits and pipes embedded in concrete6.4--Construction joints
Chapter 7--Details of reinforcement, p. 349M-28
7.1--Standard hooks7.2--Minimum bend diameters7.3--Bending7.4--Surface conditions of reinforcement7.5--Placing reinforcement7.6--Spacing limits for reinforcement7.7--Concrete protection for reinforcement7.8--Special reinforcement details for columns7.9--Connections7.10--Lateral reinforcement for compression members7.11--Lateral reinforcement for flexural members7.12--Minimum reinforcement7.13--Requirements for structural integrity
Chapter 8--Analysis and design--general considerations, p. 349M-32
8.1--Design methods8.2--Loading8.3--Methods of analysis8.4--Redistribution of negative moments in continuous flexural members8.5--Modulus of elasticity8.6--Stiffness8.7--Span length8.8--Columns8.9--Arrangement of live load8.10--T-beam construction8.11--Joist construction8.12--Separate floor finish
Chapter 9--Strength and serviceability requirements, p. 349M-34
9.1--General9.2--Required strength9.3--Design strength9.4--Design strength for reinforcement9.5--Control of deflections
Chapter 10--Flexure and axial loads, p. 349M-37
10.1--Scope10.2--Design assumptions10.3--General principles and requirements10.4--Distance between lateral supports of flexural members10.5--Minimum reinforcement of flexural members10.6--Distribution of flexural reinforcement in beams and one-way slabs10.7--Deep beams10.8--Design dimensions for compression members10.9--Limits for reinforcement of compression members10.10--Slenderness effects in compression members10.11--Magnified moments--general10.12--Magnified moments--nonsway frames10.13--Magnified moments--sway frames10.14--Axially loaded members supporting slab system10.15--Transmission of column loads through floor system10.16--Composite compression members10.17--Bearing strength
Chapter 11--Shear and torsion, p. 349M-42
11.1--Shear strength11.2--Lightweight concrete11.3--Shear strength provided by concrete for nonprestressed members11.4--Shear strength provided by concrete for prestressed members11.5--Shear strength provided by shear reinforcement11.6--Design for torsion11.7--Shear-friction11.8--Deep beams11.9--Special provisions for brackets and corbels11.10--Special provisions for walls11.11--Transfer of moments to columns11.12--Special provisions for slabs and footings
Chapter 12--Development and splices of reinforcement, p. 349M-51
12.1--Development of reinforcement--general12.2--Development of deformed bars and deformed wire in tension12.3--Development of deformed bars and deformed wire in compression12.4--Development of bundled bars12.5--Development of standard hooks in tension12.6--Mechanical anchorage12.7--Development of welded deformed wire reinforcement in tension12.8--Development of welded plain wire reinforcement in tension12.9--Development of prestressing strand12.10--Development of flexural reinforcement--general12.11--Development of positive moment reinforcement12.12--Development of negative moment reinforcement12.13--Development of web reinforcement12.14--Splices of reinforcement--general12.15--Splices of deformed bars and deformed wire in tension12.16--Splices of deformed bars in compression12.17--Special splice requirements for columns12.18--Splices of welded deformed wire reinforcement in tension12.19--Splices of welded plain wire reinforcement in tension
Chapter 13--Two-way slab systems, p. 349M-56
13.1--Scope13.2--Definitions13.3--Slab reinforcement13.4--Openings in slab systems13.5--Design procedures13.6--Direct design method13.7--Equivalent frame method
Chapter 14--Walls, p. 349M-62
14.1--Scope14.2--General14.3--Minimum reinforcement14.4--Walls designed as compression members14.5--Empirical design method14.6--Nonbearing walls14.7--Walls as grade beams14.8--Alternative design of slender walls
Chapter 15--Footings, p. 349M-63
15.1--Scope15.2--Loads and reactions15.3--Footings supporting circular or regular polygonshaped columns or pedestals15.4--Moment in footings15.5--Shear in footings15.6--Development of reinforcement in footings15.7--Minimum footing depth15.8--Transfer of force at base of column, wall, or reinforced pedestal15.9--Sloped or stepped footings15.10--Combined footings and mats
Chapter 16--Precast concrete, p. 349M-65
16.1--Scope16.2--General16.3--Distribution of forces among members16.4--Member design16.5--Structural integrity16.6--Connection and bearing design16.7--Items embedded after concrete placement16.8--Marking and identification16.9--Handling16.10--Strength evaluation of precast construction
Chapter 17--Composite concrete flexural members, p. 349M-67
17.1--Scope17.2--General17.3--Shoring17.4--Vertical shear strength17.5--Horizontal shear strength17.6--Ties for horizontal shear
Chapter 18--Prestressed concrete, p. 349M-68
18.1--Scope18.2--General18.3--Design assumptions18.4--Serviceability requirements--flexural members18.5--Permissible stresses in prestressing steel18.6--Loss of prestress18.7--Flexural strength18.8--Limits for reinforcement of flexural members18.9--Minimum bonded reinforcement18.10--Statically indeterminate structures18.11--Compression members--combined flexure and axial loads18.12--Slab systems18.13--Post-tensioned tendon anchorage zones18.14--Intentionally left blank18.15--Intentionally left blank18.16--Corrosion protection for unbonded tendons18.17--Post-tensioning ducts18.18--Grout for bonded tendons18.19--Protection for prestressing steel18.20--Application and measurement of prestressing force18.21--Post-tensioning anchorages and couplers18.22--External post-tensioning
Chapter 19--Shells, p. 349M-73
19.1--Scope19.2--General19.3--Design strength of materials19.4--Section design and reinforcement requirements19.5--Construction
Chapter 20--Strength evaluation of existing structures, p. 349M-74
20.1--Strength evaluation--general20.2--Analytical investigations--general20.3--Load tests--general20.4--Load test procedure20.5--Loading criteria20.6--Acceptance criteria20.7--Safety
Chapter 21--Provisions for seismic design,p. 349M-75
21.1--Definitions21.2--General requirements21.3--Flexural members of moment frames21.4--Moment frame members subjected to bending and axial load21.5--Joints of moment frames21.6--Intentionally left blank21.7--Reinforced concrete structural walls and coupling beams21.8--Intentionally left blank21.9--Structural diaphragms and trusses21.10--Foundations
APPENDIXES
Appendix A--Strut-and-tie models, p. 349M-82A.1--DefinitionsA.2--Strut-and-tie model design procedureA.3--Strength of strutsA.4--Strength of tiesA.5--Strength of nodal zones
Appendix B--Intentionally left blank, p. 349M-84
Appendix C--Alternative load and strength reduction factors, p. 349M-84
C.1--GeneralC.2--Required strengthC.3--Design strength
Appendix D--Anchoring to concrete, p. 349M-85
D.1--DefinitionsD.2--ScopeD.3--General requirementsD.4--General requirements for strength of anchorsD.5--Design requirements for tensile loadingD.6--Design requirements for shear loadingD.7--Interaction of tensile and shear forcesD.8--Required edge distances, spacings, and thicknesses to preclude splitting failureD.9--Installation of anchorsD.10--Structural plates, shapes, and specialty insertsD.11--Shear strength of embedded plates and shear lugsD.12--Grouted embedments
Appendix E--Thermal considerations, p. 349M-92
E.1--ScopeE.2--DefinitionsE.3--General design requirementsE.4--Concrete temperatures
Appendix F--Special provisions for impulsive and impactive effects, p. 349M-93
F.1--ScopeF.2--Dynamic strength increaseF.3--DeformationF.4--Requirements to assure ductilityF.5--Shear strengthF.6--Impulsive effectsF.7--Impactive effectsF.8--Impactive and impulsive loads
Appendix G--SI metric equivalents of U.S.
Customary Units, p. 349M-96
COMMENTARY
Introduction, p. 349M-101
Chapter R1--General requirements, p. 349M-101
R1.1--ScopeR1.2--Drawings and specificationsR1.3--InspectionR1.4--Approval of special systems of design or constructionR1.5--Quality assurance program
Chapter R2--Notation and definitions, p. 349M-102
R2.1--Commentary notationR2.2--Definitions
Chapter R3--Materials, p. 349M-102
R3.1--Tests of materialsR3.2--CementsR3.3--AggregatesR3.4--WaterR3.5--Steel reinforcementR3.6--AdmixturesR3.7--Storage and identification of materials
Chapter R4--Durability requirements, p. 349M-104
R4.2--Freezing and thawing exposuresR4.3--Sulfate exposuresR4.4--Corrosion protection of reinforcement
Chapter R5--Concrete quality, mixing, and placing,
p. 349M-105R5.1--GeneralR5.3--Proportioning on the basis of field experience, or trial mixtures, or bothR5.4--Proportioning without field experience or trial mixturesR5.6--Evaluation and acceptance of concreteR5.7--Preparation of equipment and place of depositR5.9--ConveyingR5.10--DepositingR5.11--CuringR5.12--Cold weather requirementsR5.13--Hot weather requirements
Chapter R6--Formwork, embedded pipes, andconstruction joints, p. 349M-108
R6.1--Design of formworkR6.2--Removal of forms, shores, and reshoringR6.3--Conduits and pipes embedded in concreteR6.4--Construction joints
Chapter R7--Details of reinforcement, p. 349M-108
R7.4--Surface conditions of reinforcementR7.12--Minimum reinforcementR7.13--Requirements for structural integrity
Chapter R8--Analysis and design--generalconsiderations, p. 349M-109
R8.2--LoadingR8.3--Methods of analysisR8.5--Modulus of elasticityR8.11--Joist construction
Chapter R9--Strength and serviceabilityrequirements, p. 349M-109
R9.1--GeneralR9.2--Required strengthR9.3--Design strengthR9.4--Design strength for reinforcementR9.5--Control of deflections
Chapter R10--Flexure and axial loads, p. 349M-113
R10.6--Distribution of flexural reinforcement in beamsand one-way slabs
Chapter R11--Shear and torsion, p. 349M-113
R11.12--Special provisions for slabs and footings
Chapter R12--Development and splices of
reinforcement, p. 349M-113R12.6--Mechanical anchorageR12.14--Splices of reinforcement--generalR12.15--Splices of deformed bars and deformed wire intension
Chapter R13--Two-way slab systems, p. 349M-114
Chapter R14--Walls, p. 349M-114
R14.3--Minimum reinforcement
Chapter R15--Footings, p. 349M-114
Chapter R16--Precast concrete, p. 349M-114
Chapter R17--Composite concrete flexuralmembers, p. 349M-114
Chapter R18--Prestressed concrete, p. 349M-114
Chapter R19--Shells, p. 349M-114
R19.1--ScopeR19.2--GeneralR19.4--Section design and reinforcement requirements
Chapter 20--Strength evaluation of existingstructures, p. 349M-115
R20.1--Strength evaluation--generalR20.2--Analytical investigations--generalR20.3--Load tests--generalR20.4--Load test procedureR20.5--Loading criteriaR20.6--Acceptance criteria
Chapter R21--Provisions for seismic design,p. 349M-116
R21.1--DefinitionsR21.2--General requirementsR21.3--Flexural members of moment framesR21.4--Moment frame members subjected to bendingand axial loadR21.5--Joints of moment framesR21.6--Intentionally left blankR21.7--Reinforced concrete structural walls and couplingbeamsR21.8--Intentionally left blankR21.9--Structural diaphragms and trussesR21.10--Foundations
APPENDIXES
Appendix RA--Strut-and-tie models, p. 349M-127
Appendix RB--Intentionally left blank, p. 349M-127
Appendix RC--Alternative load and designstrength-reduction factors, p. 349M-127
RC.1--General
RC.2--Required strength
RC.3--Design strength
Appendix RD--Anchoring to concrete, p. 349M-128
RD.1--DefinitionsRD.2--ScopeRD.3--General requirementsRD.4--General requirements for strength of anchorsRD.5--Design requirements for tensile loadingRD.6--Design requirements for shear loadingRD.7--Interaction of tensile and shear forcesRD.8--Required edge distances, spacings, and thicknessesto preclude splitting failureRD.9--Installation of anchorsRD.10--Structural plates, shapes, and specialty insertsRD.11--Shear strength of embedded plates and shear lugs
Appendix RE--Thermal considerations, p. 349M-141
RE.1--ScopeRE.2--DefinitionsRE.3--General design requirementsRE.4--Concrete temperatures
Appendix RF--Special provisions for impulsive
and impactive effects, p. 349M-144RF.1--ScopeRF.2--Dynamic strength increaseRF.3--DeformationRF.4--Requirements to assure ductilityRF.5--Shear strengthRF.6--Impulsive effectsRF.7--Impactive effectsRF.8--Impactive and impulsive loads
Summary of changes for 349M-06 Code, p. 349M-150