318-99 / 318R-99: Building Code Requirements for Structural Concrete & Commentary

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Description

The code portion of this documents covers the proper design and construction of buildings of structural concrete. The code has been written in such form that it may be adopted by reference in a general building code and earlier editions have been widely used in this manner.

Among the subjects covered are: drawing and specifications; inspection; durability requirements; concrete quality; mixing & placing; formwork; embedded pipes; construction joints; reinforcement details; analysis & design; strength & serviceability; flexural & axial loads; shear & torsion; development & splices of reinforcement; slab systems; walls; footings; precast concrete; composite flexural members; prestressed concrete; shells & folded plate members; strength evaluation of existing structures; special provisions for seismic design; structural plain concrete; an alternate design method in Appendix A; unidentified design provisions in Appendix B; and alternative load and strength reduction factors in Appendix C.

The quality and testing of materials used in construction are covered by reference to the appropriate ASTM standard specifications. Welding of reinforcement is covered by reference to the appropriate ANSI/AWS standard.

Because the ACI Building Code is written as a legal document so that it may be adopted by reference in a general building code, it cannot present background details or suggestions for carrying out its requirements or itent. It is the function of this commentary to fill this need.

The commentary discusses some of the considerations of the committee in developing the code with emphasis given to the explanation of new or revised provisions that may be unfamiliar to code users.

References to much of the research data referred to in preparing the code are cited for the user desiring to study individual questions in greater detail. Other documents that provide suggestions for carrying out the requirements of the code are also cited.

*** Older editions of the 318 are available. Please contact member services for pricing.

 

Document Details

Author: ACI Committee 318

Publication Year: 2017

Pages: 369

ISBN: 9780870311369

Categories: Codes, Design

Formats: Protected PDF/Web View

This document is Historical

Table of Contents

TABLE OF CONTENTS 318/318R-4

ACI 318 Building Code and Commentary

CONTENTS

PART 1—GENERAL

CHAPTER 1—GENERAL REQUIREMENTS

1.1—Scope

1.2—Drawings and specifications

1.3—Inspection

1.4—Approval of special systems of design or

construction

CHAPTER 2—DEFINITIONS

PART 2—STANDARDS FOR TESTS AND MATERIALS

CHAPTER 3—MATERIALS

3.0—Notation

3.1—Tests of materials

3.2—Cements

3.3—Aggregates

3.4—Water

3.5—Steel reinforcement

3.6—Admixtures

3.7—Storage of materials

3.8—Standards cited in this code

PART 3—CONSTRUCTION REQUIREMENTS

CHAPTER 4—DURABILITY REQUIREMENTS

4.0—Notation

4.1—Water-cementitious materials ratio

4.2—Freezing and thawing exposures

4.3—Sulfate exposures

4.4—Corrosion protection of reinforcement

CHAPTER 5—CONCRETE QUALITY, MIXING, AND PLACING

5.0—Notation

5.1—General

5.2—Selection of concrete proportions

5.3—Proportioning on the basis of field experience or trial

mixtures, or both

5.4—Proportioning without field experience or trial mixtures

5.5—Average strength reduction

5.6—Evaluation and acceptance of concrete

5.7—Preparation of equipment and place of deposit

5.8—Mixing

5.9—Conveying

5.10—Depositing

5.11—Curing

5.12—Cold weather requirements

5.13—Hot weather requirements

CHAPTER 6—FORMWORK, EMBEDDED PIPES, AND

CONSTRUCTION JOINTS

6.1—Design of formwork

6.2—Removal of forms, shores, and reshoring

6.3—Conduits and pipes embedded in concrete

6.4—Construction joints

CHAPTER 7—DETAILS OF REINFORCEMENT

7.0—Notation

7.1—Standard hooks

7.2—Minimum bend diameters

7.3—Bending

7.4—Surface conditions of reinforcement

7.5—Placing reinforcement

7.6—Spacing limits for reinforcement

7.7—Concrete protection for reinforcement

7.8—Special reinforcement details for columns

7.9—Connections

7.10—Lateral reinforcement for compression members

7.11—Lateral reinforcement for flexural members

7.12—Shrinkage and temperature reinforcement

7.13—Requirements for structural integrity

TABLE OF CONTENTS 318/318R-5

ACI 318 Building Code and Commentary

PART 4—GENERAL REQUIREMENTS

CHAPTER 8—ANALYSIS AND DESIGN—

GENERAL CONSIDERATIONS

8.0—Notation

8.1—Design methods

8.2—Loading

8.3—Methods of analysis

8.4—Redistribution of negative moments in continuous

nonprestressed flexural members

8.5—Modulus of elasticity

8.6—Stiffness

8.7—Span length

8.8—Columns

8.9—Arrangement of live load

8.10—T-beam construction

8.11—Joist construction

8.12—Separate floor finish

CHAPTER 9—STRENGTH AND SERVICEABILITY

REQUIREMENTS

9.0—Notation

9.1—General

9.2—Required strength

9.3—Design strength

9.4—Design strength for reinforcement

9.5—Control of deflections

CHAPTER 10—FLEXURE AND AXIAL LOADS

10.0—Notation

10.1—Scope

10.2—Design assumptions

10.3—General principles and requirements

10.4—Distance between lateral supports of flexural

members

10.5—Minimum reinforcement of flexural members

10.6—Distribution of flexural reinforcement in beams and

one-way slabs

10.7—Deep flexural members

10.8—Design dimensions for compression members

10.9—Limits for reinforcement of compression members

10.10—Slenderness effects in compression members

10.11—Magnified moments—General

10.12—Magnified moments—Nonsway frames

10.13—Magnified moments—Sway frames

10.14—Axially loaded members supporting slab system

10.15—Transmission of column loads through floor

system

10.16—Composite compression members

10.17—Bearing strength

CHAPTER 11—SHEAR AND TORSION

11.0—Notation

11.1—Shear strength

11.2—Lightweight concrete

11.3—Shear strength provided by concrete for nonpre-stressed

members

11.4—Shear strength provided by concrete for pre-stressed

members

11.5—Shear strength provided by shear reinforcement

11.6—Design for torsion

11.7—Shear-friction

11.8—Special provisions for deep flexural members

11.9—Special provisions for brackets and corbels

11.10—Special provisions for walls

11.11—Transfer of moments to columns

11.12—Special provisions for slabs and footings

CHAPTER 12—DEVELOPMENT AND SPLICES

OF REINFORCEMENT

12.0—Notation

12.1—Development of reinforcement—General

12.2—Development of deformed bars and deformed wire

in tension

12.3—Development of deformed bars in compression

12.4—Development of bundled bars

12.5—Development of standard hooks in tension

12.6—Mechanical anchorage

12.7—Development of welded deformed wire fabric in

tension

12.8—Development of welded plain wire fabric in tension

12.9—Development of prestressing strand

12.10—Development of flexural reinforcement—General

12.11—Development of positive moment reinforcement

12.12—Development of negative moment reinforcement

12.13—Development of web reinforcement

12.14—Splices of reinforcement—General

12.15—Splices of deformed bars and deformed wire in

tension

12.16—Splices of deformed bars in compression

12.17—Special splice requirements for columns

12.18—Splices of welded deformed wire fabric in tension

12.19—Splices of welded plain wire fabric in tension

TABLE OF CONTENTS 318/318R-6

ACI 318 Building Code and Commentary

PART 5—STRUCTURAL SYSTEMS OR ELEMENTS

CHAPTER 13—TWO-WAY SLAB SYSTEMS

13.0—Notation

13.1—Scope

13.2—Definitions

13.3—Slab reinforcement

13.4—Openings in slab systems

13.5—Design procedures

13.6—Direct design method

13.7—Equivalent frame method

CHAPTER 14

14.0—Notation

14.1—Scope

14.2—General

14.3—Minimum reinforcement

14.4—Walls designed as compression members

14.5—Empirical design method

14.6—Nonbearing walls

14.7—Walls as grade beams

14.8—Alternative design of slender walls

CHAPTER 15—FOOTINGS

15.0—Notation

15.1—Scope

15.2—Loads and reactions

15.3—Footings supporting circular or regular polygon

shaped columns or pedestals

15.4—Moment in footings

15.5—Shear in footings

15.6—Development of reinforcement in footings

15.7—Minimum footing depth

15.8—Transfer of force at base of column, wall, or rein-forced

pedestal

15.9—Sloped or stepped footings

15.10—Combined footings and mats

CHAPTER 16—PRECAST CONCRETE

16.0—Notation

16.1—Scope

16.2—General

16.3—Distribution of forces among members

16.4—Member design

16.5—Structural integrity

16.6—Connection and bearing design

16.7—Items embedded after concrete placement

16.8—Marking and identification

16.9—Handling

16.10—Strength evaluation of precast construction

CHAPTER 17—COMPOSITE CONCRETE FLEXURAL MEMBERS

17.0—Notation

17.1—Scope

17.2—General

17.3—Shoring

17.4—Vertical shear strength

17.5—Horizontal shear strength

17.6—Ties for horizontal shear

CHAPTER 18—PRESTRESSED CONCRETE

18.0 —Notation

18.1 —Scope

18.2 —General

18.3 —Design assumptions

18.4 —Permissible stresses in concrete—Flexural

members

18.5 —Permissible stresses in prestressing tendons

18.6 —Loss of prestress

18.7 —Flexural strength

18.8 —Limits for reinforcement of flexural members

18.9 —Minimum bonded reinforcement

18.10—Statically indeterminate structures

18.11—Compression members—Combined flexure and

axial loads

18.12—Slab systems

18.13—Post-tensioned tendon anchorage zones

18.14—Design of anchorage zones for monostrand or

single 5/8 in. diameter bar tendons

18.15—Design of anchorage zones for multistrand ten-dons

18.16—Corrosion protection for unbonded prestressing

tendons

18.17—Post-tensioning ducts

18.18—Grout for bonded prestressing tendons

18.19—Protection for prestressing tendons

18.20—Application and measurement of prestressing

force

18.21—Post-tensioning anchorage zones and couplers

18.22—External post-tensioning

TABLE OF CONTENTS 318/318R-7

ACI 318 Building Code and Commentary

CHAPTER 19—SHELLS AND FOLDED PLATE MEMBERS

19.0—Notation

19.1—Scope and definitions

19.2—Analysis and design

19.3—Design strength of materials

19.4—Shell reinforcement

19.5—Construction

PART 6—SPECIAL CONSIDERATIONS

CHAPTER 20—STRENGTH EVALUATION OF

EXISTING STRUCTURES

20.0—Notation

20.1—Strength evaluation—General

20.2—Determination of required dimensions and material

properties

20.3—Load test procedure

20.4—Loading criteria

20.5—Acceptance criteria

20.6—Provision for lower load rating

20.7—Safety

CHAPTER 21—SPECIAL PROVISIONS FOR SEISMIC DESIGN

21.0—Notation

21.1—Definitions

21.2—General requirements

21.3—Flexural members of special moment frames

21.4—Special moment frame members subjected to

bending and axial load

21.5—Joints of special moment frames

21.6—Special reinforced concrete structural walls and

coupling beams

21.7—Structural diaphragms and trusses

21.8—Foundations

21.9—Frame members not proportioned to resist forces

induced by earthquake motions

21.10—Requirements for intermediate moment frames

PART 7—STRUCTURAL PLAIN CONCRETE

CHAPTER 22—STRUCTURAL PLAIN CONCRETE

22.0—Notation

22.1—Scope

22.2—Limitations

22.3—Joints

22.4—Design method

22.5—Strength design

22.6—Walls

22.7—Footings

22.8—Pedestals

22.9—Precast members

22.10—Plain concrete in earthquake-resisting structures

COMMENTARY REFERENCES

APPENDIXES

APPENDIX A—ALTERNATE DESIGN METHOD

A.0—Notation

A.1—Scope

A.2—General

A.3—Permissible service load stresses

A.4—Development and splices of reinforcement

A.5—Flexure

A.6—Compression members with or without flexure

A.7—Shear and torsion

APPENDIX B—UNIFIED DESIGN PROVISIONS FOR REINFORCED AND

PRESTRESSED CONCRETE FLEXURAL AND

COMPRESSION MEMBERS

B.1—Scope

TABLE OF CONTENTS 318/318R-8

ACI 318 Building Code and Commentary

APPENDIX C—ALTERNATIVE LOAD AND STRENGTH

REDUCTION FACTORS

C.1—General

APPENDIX D—NOTATION

APPENDIX E—STEEL REINFORCEMENT INFORMATION

INDEX

ERRATA INFO

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