ACI CODE-530/530.1-11: Building Code Requirements and Specification for Masonry Structures and Related Commentaries

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The 2011 edition represents a major update from the former edition both in technical requirements and in layout. The Code and Specification are written as legal documents so that they may be adopted by reference in general building codes. The Code covers the design and construction of masonry structures, with subjects covered ranging from quality assurance to the details and development of reinforcement. Compliance with the Specification is required by the Code to control materials, labor and construction. The commentaries present background details, committee considerations, and research data used to develop the Code and Specification. The Commentaries are not mandatory and are for information only.

Many revisions and enhancements have been made including:

• a recalibration of allowable stresses;

• the addition of provisions for infill masonry; and

• a refinement of the quality assurance/special inspection provisions for masonry that includes references to relevant requirements for each inspection task.

(TMS 402-11/ACI 530-11/ASCE 5-11) (TMS 602-11/ACI 530.1-11/ASCE 6-11)

Keywords: AAC; masonry; anchors; autoclaved aerated concrete (AAC) masonry; clay brick; clay tile; concrete block; concrete brick; construction; construction materials; curing; grout; grouting; inspection; joints; materials handling.


Document Details

Author: Joint ACI/ASCE/TMS

Publication Year: 2011

Pages: 319

ISBN: 9781929081363

Categories: Codes, Masonry

Formats: Printed Document or Protected PDF/Web View

This document is Historical

Table of Contents

Building Code Requirements for Masonry Structures (TMS 402-11/ACI 530-11/ASCE 5-11)

Specification for Masonry Structures (TMS 602-11/ACI 530.1-11/ASCE 6-11)

Chapter 1 General Design Requirements for Masonry

1.1 Scope

1.1.1 Minimum requirements

1.1.2 Governing building code

1.1.3 Design procedures

1.1.4 SI equivalents

1.2 Contract documents and calculations

1.3 Approval of special systems of design or construction

1.4 Standards cited in this Code

1.5 Notation

1.6 Definitions

1.7 Loading

1.7.1 General

1.7.2 Load provisions

1.7.3 Lateral load resistance

1.7.4 Load transfer at horizontal connections

1.7.5 Other effects

1.7.6 Lateral load distribution

1.8 Material Properties

1.8.1 General

1.8.2 Elastic moduli

1.8.3 Coefficients of thermal expansion

1.8.4 Coefficients of moisture expansion for clay masonry

1.8.5 Coefficients of shrinkage

1.8.6 Coefficients of creep

1.8.7 Prestressing steel

1.9 Section properties

1.9.1 Stress computations

1.9.2 Stiffness

1.9.3 Radius of gyration

1.9.4 Intersecting walls

1.9.5 Bearing area

1.9.6 Effective compressive width per bar

1.9.7 Concentrated loads

1.10 Connection to structural frames

1.11 Masonry not laid in running bond

1.12 Corbels

1.12.1 Loadbearing corbels

1.12.2 Non-loadbearing corbels

1.13 Beams

1.13.1 General Beam Design

1.13.2 Deep Beams

1.14 Columns

1.14.1 General column design

1.14.2 Lightly loaded columns

1.15 Pilasters

1.16 Details of reinforcement and metals accessories

1.16.1 Embedment

1.16.2 Size of reinforcement

1.16.3 Placement of reinforcement

1.16.4 Protection of reinforcement and metal accessories

1.16.5 Standard hooks

1.16.6 Minimum bend diameter for reinforcing bars

1.17 Anchor bolts

1.17.1 Placement

1.17.2 Projected area for axial tension

1.17.3 Projected area for shear

1.17.4 Effective embedment length for headed anchor bolts

1.17.5 Effective embedment length of bent-bar anchor bolts

1.17.6 Minimum permissibale effective embedment length

1.17.7 Anchor bold edge distance

1.18 Seismic design requirements

1.18.1 Scope

1.18.2 General analysis

1.18.3 Element Classification

1.18.4 Seismic Design Category requirements

1.19 Quality Assurance Program

1.19.1 Level A Quality Assurance

1.19.2 Level B Quality Assurance

1.19.3 Level C Quality Assurance

1.19.4 Procedures

1.19.5 Qualifications

1.19.6 Acceptance relative to strength requirements

1.20 Construction

1.20.1 Grouting, minimum spaces

1.20.2 Embedded conduits, pipes, and sleeves

Chapter 2 Allowable Stress Design of Masonry

2.1 General

2.1.1 Scope

2.1.2 Load combinations

2.1.3 Design Strength

2.1.4 Anchor bolts embedded in grout

2.1.5 Multywythe walls

2.1.6 Bearing Stress

2.1.7 Development of reinforcement embedded in grout

2.2 Unreinforced masonry

2.2.1 Scope

2.2.2 Stresses in reinforcement

2.2.3 Axial compression and flexure

2.2.4 Axial tension

2.2.5 Shear

2.3 Reinforced masonry

2.3.1 Scope

2.3.2 Design assumptions

2.3.3 Steel reinforcement - allowable stresses

2.3.4 Axial compression and flexure

2.3.5 Axial tension and flexural tension

2.3.6 Shear

Chapter 3 Strength Design of Masonry

3.1 General

3.1.1 Scope

3.1.2 Required strength

3.1.3 Design strength

3.1.4 Strength reduction factors

3.1.5 Deformation requirements

3.1.6 Anchor bolts embedded in grout

3.1.7 Nominal bearing strength

3.1.8 Material properties

3.2 Unreinforced (plain) masonry

3.2.1 Scope

3.2.2 Flexural and axial strength of unreinforced (plain) masonry members

3.2.3 Axial tension

3.2.4 Nominal shear strength

3.3 Reinforced masonry

3.3.1 Scope

3.3.2 Design assumptions

3.3.3 Reinforcement requirements and details

3.3.4 Design of beams, piers, and columns

3.3.5 Wall design for out-of-plane loads

3.3.6 Wall design for in-plane loads

Chapter 4 Prestressed Masonry

4.1 General

4.1.1 Scope

4.2 Design methods

4.2.1 General

4.2.2 After Transfer

4.3 Permissible stresses in prestressing tendons

4.3.1 Jacking force

4.3.2 Immediately after transfer

4.3.3 Post-tensioned masonry members

4.3.4 Effective prestress

4.4 Axial compression and flexure

4.4.1 General

3.3.2 Service load requirements

4.4.3 strength requirements

4.5 Axial tension

4.6 Shear

4.7 Deflection

4.8 Prestressing tendon anchorages, couplers, and end blocks

4.8.4 Bearing stresses

4.9 Protection of prestressing tendons and accessories

4.10 Developement of prestressing tendons and accessories

Chapter 5 Empirical Design of Masonry

5.1 General

5.1.1 Scope

5.1.2 Limitations

5.2 Height

5.3 Lateral stability

5.3.1 Shear walls

5.3.2 Roofs

5.4 Compressive stress requirements

5.4.1 Calculations

5.4.2 Allowable compressive stresses

5.5 Lateral Support

5.5.1 Maximum l/t and h/t

5.5.2 Cantilever walls

5.5.3 Support elements

5.6 Thickness of masonry

5.6.1 General

5.6.2 Minimum thickness

5.6.3 Foundations walls

5.6.4 Parapet walls

5.7 Bond

5.7.1 General

5.7.2 Bonding with masonry headers

5.7.3 Bonding with wall ties of joint reinforcement

5.7.4 Natural or cast stone

5.8 Anchorage

5.8.1 General

5.8.2 Intersecting walls

5.8.3 Floor and roof anchorage

5.8.4 Walls adjoining structural framing

5.9 Miscellaneous requirements

5.9.1 Chases and recesses

5.9.2 Lintels

5.9.3 Support on wood

Chapter 6 Veneer

6.1 General

6.1.1 Scope

6.1.2 Design of anchored veneer

6.1.3 Design of adhered veneer

6.1.4 Dimension stone

6.1.5 Autoclaved aerated concrete masonry veneer

6.1.6 General design requirements

6.2 Anchored veneer

6.2.1 Alternative design of anchored masonry veneer

6.2.2 Prescriptive requirements for anchored masonry veneer

6.3 Adhered Veneer

6.3.1 Alternative design of adhered masonry veneer

6.3.2 Prescriptive requirements for adhered masonry veneer

Chapter 7 Glass Unit Masonry

7.1 General

7.1.1 Scope

7.1.2 General Design Requirements

7.1.3 Units

7.2 Panel Size

7.2.1 Exterior standard-unit panels

7.2.2 Exterior thin-unit panels

7.2.3 Interior panels

7.2.4 Curved panels

7.3 Support

7.3.1 General requirements

7.3.2 Vertical

7.3.3 Lateral

7.4 Expansion joints

7.5 Base surface treatments

7.6 Mortar

7.7 Reinforcement

Chapter 8 Strength Design of Autoclaved Aerated Concrete (AAC) Masonry

8.1 General

8.1.1 Scope

8.1.2 Required Strength

8.1.3 Design Strength

8.1.4 Strength of joints

8.1.5 Strength-reduction factors

8.1.6 Deformation requirements

8.1.7 Anchor Bolts

8.1.8 Material Properties

8.1.9 Nominal bearing strength

8.1.10 Corbels

8.2 Unreinforced (plain) AAC masonry

8.2.1 Scope

8.2.2 Flexural strength of unreinforced (plain) AAC masonry members

8.2.3 Nominal axial strength of unreinforced (plain) AAC masonry members

8.2.4 Axial tension

8.2.5 Nominal shear strength of unreinforced (plain) AAC masonry members

8.2.6 Flexural cracking

8.3 Reinforced (plain) AAC masonry

8.3.1 Scope

8.3.2 Design Assumptions

8.3.3 Reinforcement Requirements and details

8.3.4 Design of beams, piers, and columns

8.3.5 Wall design for out-of-plane loads

8.3.6 Wall design for in-plane loads

Appendix B Design of Masonry Infill

B.1 General

B.1.1 Scope

B.1.2 Required Strength

B.1.3 Design Strength

B.1.4 Strength reduction factors

B.1.5 Limitations

B.2 Non-Participating Infills

B.2.1 In-Plane isolation joints for non-participating infills

B.2.2 Design of non-participating infills for out-of-plane loads

B.3 Participating Infills

B.3.1 General

B.3.2 In-plane connection requirements for participating infills

B.3.3 Out of plane connection requirements for participating infills

B.3.4 Design of participating infills for in plane loads

B.3.5 Design of frame elements with participating infills for in plane loads

Conversion of inch-pound units to si units

Reference for the code commentary


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