AS 3700-2001 Masonry structures

217 Pages·2001·3.382 MB·English

by  Standards Australia

AS 3700—2001
(Incorporating Amendment Nos 1, 2 and 3)
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Australian Standard®
Masonry structures
This Australian Standard® was prepared by Committee BD-004, Masonry Structures. It was
approved on behalf of the Council of Standards Australia on 12 October 2001.
This Standard was published on 27 November 2001.
The following are represented on Committee BD-004:
(cid:129) Australian Building Codes Board
(cid:129) Australian Chamber of Commerce and Industry
(cid:129) Building Designers Association of Australia
(cid:129) Calcium Silicate Brick Manufacturers
(cid:129) Cement and Concrete Association of Australia
(cid:129) Clay Brick and Paver Institute
(cid:129) Concrete Masonry Association of Australia Limited
(cid:129) CSIRO, Building, Construction and Engineering
(cid:129) Housing Industry Association
A2 (cid:129) Masonry Contractors Association
(cid:129) Master Builders Australia
(cid:129) NSW Department of Public Works and Services
(cid:129) The Association of Consulting Engineers Australia
(cid:129) University of Newcastle
This Standard was issued in draft form for comment as DR 00381.
Standards Australia wishes to acknowledge the participation of the expert individuals that
contributed to the development of this Standard through their representation on the
Committee and through the public comment period.
Keeping Standards up-to-date
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systems. To maintain their currency, all Standards are periodically reviewed, and new editions
are published. Between editions, amendments may be issued.
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using a current Standard, which should include any amendments that may have been
published since the Standard was published.
Detailed information about Australian Standards, drafts, amendments and new projects can
be found by visiting www.standards.org.au
Standards Australia welcomes suggestions for improvements, and encourages readers to
notify us immediately of any apparent inaccuracies or ambiguities. Contact us via email at
[email protected], or write to Standards Australia, GPO Box 476, Sydney, NSW 2001.
AS 3700—2001
(Incorporating Amendment Nos 1, 2 and 3)
Australian Standard®
Masonry structures
Originated in part as AS CA32—1963.
Previous edition AS 3700—1998.
Third edition 2001.
Reissued incorporating Amendment No. 1 (May 2002).

Reissued incorporating Amendment No. 2 (December 2003).
Reissued incorporating Amendment No. 3 (August 2007).
COPYRIGHT
© Standards Australia
All rights are reserved. No part of this work may be reproduced or copied in any form or by
any means, electronic or mechanical, including photocopying, without the written
permission of the publisher.
Published by Standards Australia GPO Box 476, Sydney, NSW 2001, Australia
ISBN 0 7337 4173 8
AS 3700—2001 2
PREFACE
This Standard was prepared by the Standards Australia Committee BD-004, Masonry
Structures, to supersede AS 3700—1998, Masonry structures.
This Standard incorporates Amendment No. 1 (May 2002), Amendment No. 2 (December
2003) and Amendment No. 3 (August 2007). The changes required by the Amendment are
indicated in the text by a marginal bar and amendment number against the clause, note,
table, figure or part thereof affected.
The objective of this Standard is to provide minimum requirements for the design and
construction of unreinforced, reinforced and prestressed masonry, including built-in
components, for use in masonry applications.
The Standard is the result of a consensus among representatives on the Joint Committee that
it be produced as an Australian Standard.
In the preparation of this Standard valuable assistance was given by organizations and
individuals experienced in various aspects of the design and construction of masonry, and
the Committee acknowledges their help.
Acknowledgment is also made of the assistance gained from the following documents and
publications:
(a) Australian Masonry Manual, published by a joint committee of the Public Works
Department, N.S.W. and the Association of Consulting Structural Engineers, N.S.W.
(b) Publications of the Clay Brick and Paver Institute; the Concrete Masonry Association
of Australia Co-op Limited; the CSIRO Division of Building, Construction and
Engineering; and the Department of Civil, Surveying and Environmental Engineering
of the University of Newcastle.
Statements expressed in mandatory terms in notes to tables and figures are deemed to be
requirements of this Standard.
The terms ‘normative’ and ‘informative’ have been used in this Standard to define the
application of the appendix to which they apply. A ‘normative’ appendix is an integral part
of a Standard, whereas an ‘informative’ appendix is only for information and guidance.
3 AS 3700—2001
CONTENTS
Page
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE AND APPLICATION.....................................................................................6
1.2 REFERENCED DOCUMENTS..................................................................................6
1.3 USE OF ALTERNATIVE MATERIALS OR METHODS..........................................8
1.4 INFORMATION TO BE PROVIDED ON DOCUMENTS.........................................8
1.5 DEFINITIONS............................................................................................................9
1.6 NOTATION..............................................................................................................16
SECTION 2 PERFORMANCE REQUIREMENTS FOR DESIGN
2.1 SCOPE OF SECTION...............................................................................................24
2.2 AIM...........................................................................................................................24
2.3 PERFORMANCE REQUIREMENTS.......................................................................24
2.4 DESIGN REQUIREMENTS.....................................................................................24
2.5 SERVICEABILITY, STRENGTH AND STABILITY..............................................25
2.6 LOADS AND LOAD COMBINATIONS..................................................................26
2.7 OTHER DESIGN REQUIREMENTS.......................................................................27
2.8 THERMAL INSULATION.......................................................................................28
2.9 SOUND INSULATION.............................................................................................28
SECTION 3 DESIGN PROPERTIES
3.1 SCOPE OF SECTION...............................................................................................29
3.2 MASONRY UNITS...................................................................................................29
3.3 MASONRY...............................................................................................................29
3.4 TIES AND ACCESSORIES......................................................................................32
3.5 GROUT.....................................................................................................................33
3.6 REINFORCEMENT..................................................................................................33
3.7 TENDONS................................................................................................................34
SECTION 4 GENERAL DESIGN ASPECTS
4.1 SCOPE OF SECTION...............................................................................................35
4.2 MEMBERS OF MIXED CONSTRUCTION.............................................................35
4.3 CHASES, HOLES AND RECESSES........................................................................35
4.4 CAPACITY REDUCTION FACTORS.....................................................................35
4.5 CROSS-SECTION PROPERTIES.............................................................................36
4.6 DESIGN FOR ROBUSTNESS..................................................................................37
4.7 PREVENTION OF MOISTURE PENETRATION....................................................39
4.8 CONTROL JOINTS..................................................................................................41
4.9 MORTAR JOINTS....................................................................................................41
4.10 WALL TIES..............................................................................................................41
4.11 BONDING, TYING AND SUPPORTING................................................................42
4.12 ARCHES AND LINTELS.........................................................................................43
4.13 INTERACTION BETWEEN MASONRY MEMBERS AND SLABS, BEAMS
OR COLUMNS.........................................................................................................43
4.14 CORBELLING..........................................................................................................43
4.15 ATTACHMENT TO FACE OF WALLS...................................................................44
AS 3700—2001 4
Page
SECTION 5 DESIGN FOR DURABILITY
5.1 SCOPE OF SECTION...............................................................................................45
5.2 EXPOSURE ENVIRONMENTS...............................................................................45
5.3 MASONRY UNITS...................................................................................................45
5.4 MORTAR..................................................................................................................45
5.5 BUILT-IN COMPONENTS......................................................................................45
5.6 GROUT.....................................................................................................................46
5.7 REINFORCEMENT AND TENDONS......................................................................46
SECTION 6 DESIGN FOR FIRE RESISTANCE
6.1 SCOPE OF SECTION...............................................................................................49
6.2 FIRE-RESISTANCE LEVELS..................................................................................49
6.3 STRUCTURAL ADEQUACY..................................................................................49
6.4 INTEGRITY..............................................................................................................53
6.5 INSULATION...........................................................................................................54
6.6 RECESSES FOR SERVICES....................................................................................55
6.7 CHASES....................................................................................................................56
6.8 PROTECTION OF STRUCTURAL STEELWORK..................................................56
SECTION 7 STRUCTURAL DESIGN OF UNREINFORCED MASONRY
7.1 SCOPE OF SECTION...............................................................................................57
7.2 GENERAL BASIS OF DESIGN...............................................................................57
7.3 DESIGN FOR MEMBERS IN COMPRESSION.......................................................57
7.4 DESIGN FOR MEMBERS IN BENDING................................................................72
7.5 DESIGN FOR MEMBERS IN SHEAR.....................................................................79
7.6 DESIGN OF SHEAR WALLS..................................................................................81
7.7 DESIGN OF MASONRY VENEER WALLS...........................................................81
7.8 DESIGN OF CAVITY WALLS................................................................................83
7.9 DESIGN OF DIAPHRAGM WALLS........................................................................84
SECTION 8 STRUCTURAL DESIGN OF REINFORCED MASONRY
8.1 SCOPE OF SECTION...............................................................................................85
8.2 GENERAL BASIS OF DESIGN...............................................................................85
8.3 GENERAL REINFORCEMENT REQUIREMENT..................................................85
8.4 DESIGN FOR MEMBERS IN COMPRESSION.......................................................86
8.5 DESIGN FOR MEMBERS IN BENDING................................................................87
8.6 DESIGN FOR MEMBERS IN SHEAR.....................................................................88
8.7 DESIGN FOR MEMBERS IN TENSION.................................................................90
8.8 DESIGN FOR MEMBERS IN COMBINED BENDING AND COMPRESSION.....91
8.9 DESIGN FOR MEMBERS IN COMBINED BENDING AND TENSION................91
SECTION 9 STRUCTURAL DESIGN OF PRESTRESSED MASONRY
9.1 SCOPE OF SECTION...............................................................................................92
9.2 GENERAL BASIS OF DESIGN...............................................................................92
9.3 DESIGN CRITERIA FOR PRESTRESSING TENDONS.........................................93
9.4 DESIGN FOR MEMBERS IN COMPRESSION.......................................................94
9.5 DESIGN FOR MEMBERS IN BENDING................................................................94
9.6 DESIGN FOR MEMBERS IN SHEAR.....................................................................97
9.7 DESIGN FOR MEMBERS IN TENSION.................................................................97
9.8 DESIGN FOR MEMBERS IN COMBINED BENDING AND COMPRESSION.....97
9.9 DESIGN FOR MEMBERS IN COMBINED BENDING AND TENSION................98
9.10 DESIGN OF ANCHORAGE ZONES........................................................................98
5 AS 3700—2001
Page
SECTION 10 MATERIALS
10.1 SCOPE OF SECTION...............................................................................................99
10.2 MASONRY...............................................................................................................99
10.3 MASONRY UNITS...................................................................................................99
10.4 MORTAR..................................................................................................................99
10.5 WALL TIES, CONNECTORS, ACCESSORIES AND LINTELS..........................101
10.6 DAMP-PROOF COURSES, FLASHINGS AND WEATHERINGS.......................101
10.7 GROUT...................................................................................................................101
10.8 REINFORCEMENT AND TENDONS....................................................................102
SECTION 11 CONSTRUCTION
11.1 SCOPE OF SECTION.............................................................................................104
11.2 GENERAL..............................................................................................................104
11.3 MATERIALS..........................................................................................................104
11.4 WORKMANSHIP...................................................................................................105
11.5 TOLERANCES IN MASONRY..............................................................................107
11.6 SITE CONTROL.....................................................................................................109
11.7 ADDITIONAL SITE CONTROL OF SPECIAL MASONRY.................................109
11.8 GROUTED MASONRY..........................................................................................110
11.9 MASONRY UNDER CONSTRUCTION................................................................110
11.10 CLEANING.............................................................................................................111
11.11 TESTING OF IN SITU MASONRY.......................................................................111
SECTION 12 SIMPLIFIED DESIGN OF MASONRY FOR SMALL BUILDINGS
12.1 SCOPE OF SECTION.............................................................................................112
12.2 MATERIALS..........................................................................................................115
12.3 WALL SELECTION...............................................................................................119
12.4 LINTELS.................................................................................................................131
12.5 BRACING...............................................................................................................135
12.6 DETAILING............................................................................................................141
12.7 CONSTRUCTION...................................................................................................148
12.8 FLASHINGS IN CHIMNEYS.................................................................................149
APPENDICES
A ADDITIONAL CRITERIA FOR STRUCTURES SUBJECT TO EARTHQUAKE
ACTIONS DETERMINED IN ACCORDANCE WITH AS 1170.4—1993............151
AA ADDITIONAL CRITERIA FOR STRUCTURES SUBJECT TO EARTHQUAKE
ACTIONS DETERMINED IN ACCORDANCE WITH AS 1170.4—2007............157
B DETERMINATION OF CHARACTERISTIC VALUE..........................................168
C METHOD OF TEST FOR COMPRESSIVE STRENGTH......................................170
D METHOD OF TEST FOR FLEXURAL STRENGTH.............................................174
E ATMOSPHERIC ENVIRONMENTS......................................................................181
F GUIDANCE ON THE USE OF MASONRY IN RESTORATION WORK
AND MASONRY CONSTRUCTED USING SQUARE-DRESSED
NATURAL STONE.................................................................................................184
FA DURABILITY TESTING........................................................................................185
G METHOD OF MEASUREMENT OF BOW............................................................188
H ASSESSMENT OF STRENGTH VALUES FROM TEST RESULTS....................189
I TESTING OF IN SITU MASONRY.......................................................................191
J BASIS OF DESIGN FOR SECTION 12..................................................................192
K RACKING FORCES...............................................................................................197
AS 3700—2001 6
STANDARDS AUSTRALIA
Australian Standard
Masonry structures
S E C T I O N 1 S C O P E A N D G E N E R A L
1.1 SCOPE AND APPLICATION
1.1.1 Scope
This Standard sets out minimum requirements for the design and construction of masonry,
including unreinforced, reinforced and prestressed, using manufactured units of clay,
calcium silicate and concrete laid in mortar, autoclaved aerated concrete (AAC) laid in thin-
bed mortar, and square-dressed natural stone laid in mortar.
The Standard does not give values or material properties for the design and construction of
square-dressed natural stone.
NOTES:
1 This Standard assumes that the structural design of masonry is entrusted to experienced
structural engineers or similar appropriately qualified persons, and that the execution of such
work is carried out under the direction of appropriately qualified persons who are experienced
in masonry construction and who understand the structural requirements.
2 The Standard does not give specific requirements for prefabricated masonry panels or
masonry in composite action with steel or concrete structural members. The principles of this
Standard should be followed, as far as they are applicable, for such types of construction.
3 The provisions of this Standard do not include specification for design and construction of
AAC laid in other than thin-bed mortar. However, for masonry so constructed the general
principles of this Standard may be used.
1.1.2 Application
This Standard will be referenced in the Building Code of Australia by way of BCA
Amendment 10 to be published by 1 January 2002, thereby superseding the previous
edition, AS 3700—1998, which will be withdrawn 12 months from the date of the
publication of this edition.
1.2 REFERENCED DOCUMENTS
The following documents are referred to in this Standard:
AS
1141 Methods of sampling and testing aggregates
1170 Minimum design loads on structures
1170.1 Part 1: Dead and live loads and load combinations
1170.2 Part 2: Wind loads
1170.3 Part 3: Snow loads
1170.4 Part 4: Earthquake loads
A2
Not applicable
1310 Steel wire for tendons in prestressed concrete
1311 Steel tendons for prestressed concrete—7-wire stress-relieved steel strand for
tendons in prestressed concrete
© Standards Australia www.standards.org.au
7 AS 3700—2001
AS
1313 Steel tendons for prestressed concrete—Cold-worked high-tensile alloy steel
bars for prestressed concrete
1316 Masonry cement
1397 Steel sheet and strip—Hot-dipped zinc-coated or aluminium/zinc-coated
1478 Chemical admixtures for concrete, mortar and grout
1478.1 Part 1: Admixtures for concrete
1449 Wrought alloy steels—Stainless and heat-resisting steel plate, sheet and strip
1530 Methods for fire tests on building materials, components and structures
1530.4 Part 4: Fire-resistance tests of elements of building construction
1672 Limes and limestones
1672.1 Part 1: Limes for building
1684 Residential timber-framed construction
1684.2 Part 2: Non-cyclonic areas
1684.3 Part 3: Cyclonic areas
1684.4 Part 4: Simplified—Non-cyclonic areas
2870 Residential slabs and footings—Construction
2193 Methods for calibration and grading of force-measuring systems of testing
machines
2601 Demolition of structures
2699 Built in components for masonry construction
2699.1 Part 1: Wall ties
2699.2 Part 2: Connectors and accessories
2699.3 Part 3: Lintels and shelf angles—Durability requirements
2701 Methods of sampling and testing mortar for masonry construction
2758 Aggregates and rock for engineering purposes
2758.1 Part 1: Concrete aggregates
2837 Wrought alloy steels—Stainless steel bars and semi-finished products
2870 Residential slabs and footings—Construction
2904 Damp-proof courses and flashings
3582 Supplementary cementitious materials for use with portland and blended
cement
3582.1 Part 1: Fly ash
3582.2 Part 2: Slag—Ground granulated iron blast-furnace
3582.3 Part 3: Silica fume
3623 Domestic metal framing
3600 Concrete structures
3972 Portland and blended cements
4055 Wind loads for housing
AS/NZS
2311 Guide to the painting of buildings
2312 Guide to the protection of iron and steel against exterior atmospheric corrosion
www.standards.org.au © Standards Australia
AS 3700—2001 8
AS/NZS
3679 Structural steel
3679.1 Part 1: Hot-rolled bars and sections
4455 Masonry units and segmental pavers
4456 Masonry units and segmental pavers—Methods of test
4456.4 Method 4: Determining compressive strength of masonry units
4456.10 Method 10: Determining resistance to salt attack
4456.11 Method 11: Determining coefficients of expansion
4456.12 Method 12: Determining coefficients of contraction
A1
4671 Steel reinforcing materials
BCA Building Code of Australia
BS
EN 12878 Specification for pigments for portland cement and portland cement products
5628-3 Code of practice for stone masonry
ISO
9223 Corrosion of metals and alloys—Corrosivity of atmospheres—Classification
Austroads
Bridge Design Code
1.3 USE OF ALTERNATIVE MATERIALS OR METHODS
1.3.1 General
Provided that the requirements of Section 2 are met, this Standard shall not be interpreted in
a way that prevents the use of alternative materials or methods of design or construction not
specifically referred to herein.
NOTE: Where the intended use is subject to the control of a building authority, approval for the
use of alternative materials or methods will need to be obtained from the relevant authority.
1.3.2 Existing structures
Where the strength or serviceability of an existing structure is to be evaluated, the general
principles of this Standard shall be applied. Appropriate values for the properties of the
materials in the structure shall be used.
1.4 INFORMATION TO BE PROVIDED ON DOCUMENTS
1.4.1 General
Documents shall show information necessary to construct the masonry, including the
following:
(a) Category, type and work sizes, including the face shell width for units that are to be
face-shell bedded (see Clause 3.2), of the masonry units as defined in
Clauses 1.5.2.22 and 1.5.2.36.
( )
(b) Value of the characteristic unconfined compressive strength f′ required for the
uc
masonry units.
(c) Mix proportions of the mortar or, for proprietary thin-bed mortar, the specification.
(d) Finish to the joints and the depth of raking (if any) of the mortar joints.
(e) Bond pattern for the masonry.
© Standards Australia www.standards.org.au