NZS 4230:2004
Design of reinforced concrete masonry structures
Provides up to date information for the design of reinforced concrete masonry structures. This revision recognizes the predominant use of reinforced concrete masonry for structural applications in NZ, and incorporates research findings specifically pertaining to the performance of reinforced and prestressed concrete masonry.
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COMMITTEE REPRESENTATION
ACKNOWLEDGEMENT
© COPYRIGHT
AMENDMENTS
CONTENTS
REFERENCED DOCUMENTS
FOREWORD
Review of Standard
1 GENERAL
1.1 Scope
1.2 Interpretation
2 DEFINITIONS
2.1 General
3 LIMIT STATE DESIGN REQUIREMENTS AND MATERIAL PROPERTIES
3.1 Notation
3.2 Scope
3.3 General principles and requirements for construction
3.4 Material and strength properties
3.5 Limit state requirement for design 3.5.1
3.6 General principles, assumptions, and requirements for analysis and design
3.7 Principles and requirements for components designed for seismic loading
4 DESIGN FOR DURABILITY
4.1 Scope
4.2 Classification of sites into sea spray zones or corrosion zones
4.3 Governing reinforcing cover requirements
5 DESIGN FOR FIRE RESISTANCE
5.1 Notation
5.2 Scope
5.3 Design requirements
5.4 Fire resistance ratings for walls
5.5 Fire resistance ratings for beams
5.6 Fire resistance ratings for columns
5.7 Fire resistance ratings from fire tests
5.8 Fire resistance rating by calculation
5.9 Increase of fire resistance ratings by use of insulating materials
6 REINFORCEMENT
6.1 Notation
6.2 Scope
6.3 General principles and requirements for all structures
6.4 Principles and requirements additional to 6.3 for structures designed using a limited ductile or ductile seismic design philosophy
7 STRUCTURAL WALLS
7.1 Notation
7.2 Scope
7.3 General principles and requirements for all structures
7.4 Principles and requirements additional to 7.3 for structures designed using a limited ductile or ductile seismic design philosophy
8 BEAMS
8.1 Notation
8.2 Scope
8.3 General principles and requirements for all structures
8.4 Principles and requirements additional to 8.3 for structures designed using a limited ductile or ductile seismic design philosophy
9 COLUMNS
9.1 Notation
9.2 Scope
9.3 General principles and requirements for all structures
9.4 Principles and requirements additional to 9.3 for structures designed using a limited ductile or ductile seismic design philosophy
10 STRUCTURAL COMPONENT DESIGN
10.1 Notation
10.2 Flexure with or without axial load
10.3 Shear and torsion
11 BEAM-COLUMN JOINTS
11.1 Notation
11.2 Scope
11.3 General principles and requirements for all structures
11.4 Principles and requirements additional to 11.3 for joints in structures designed using a limited ductile or ductile seismic design philosophy
12 SECONDARY STRUCTURAL ELEMENTS
12.1 Notation
12.2 Scope
12.3 General principles and requirements
12.4 Secondary walls
12.5 Frames with masonry in-fill
12.6 Partitions
APPENDIX
A PRESTRESSED MASONRY
B DETERMINATION OF CONCRETE MASONRY COMPRESSIVE STRENGTHS
C BOLTED CONNECTIONS IN MASONRY
D PARTIAL FILL REQUIREMENTS
E SPECIFIC DESIGN FOR SMALL REINFORCED MASONRY BUILDINGS
F MASONRY VENEERS
Table
3.1 – Observation types, admissible use and design compressive strengths
3.2 – Design parameters for various design philosophies
4.1 – Masonry durability requirements
5.1 – Minimum wall thickness for fire resistance ratings for insulation
5.2 – Minimum cover to vertical reinforcement and tendons for stability of walls
5.3 – Stability requirements – Simply supported beams
5.4 – Stability requirements – Continuous beams
6.1 – Minimum diameters of bend for Class E steel bars to AS/NZS 4671 other than stirrup and tie bends
6.2 – Minimum diameters of bends for stirrups and ties for Class E steel bars to AS/NZS 4671
8.1 – Longitudinal reinforcement limits in a 390 mm x 190 mm masonry lintel beam
10.1 – Type dependent design strengths (MPa)
A1 – Maximum concrete masonry stresses and steel stress range for the design of sections at the serviceability limit state
C1 – Design strength in shear and tension of bolts cast into reinforced masonry
F1 – Maximum height of unreinforced masonry veneers which are subject to specific design (m)
Figure
3.1 – Shrinkage control joints
4.1 – Sea spray and corrosion zone map
5.1 – Standard furnace temperature-time curve
5.2 – Changes to moments in continuous beams during a fire
5.3 – Stability requirements – Columns
5.4 – Values of elastic modulus to be used in determining fire resistance rating by calculation
5.5 – Values of strength to be used in determining fire resistance rating by calculation
6.1 – Standard hooks
7.1 – Confining plates in potential plastic hinge regions
8.1 – Grout space dimensions
9.1 – Typical construction of masonry columns showing alternating courses
10.1 – Effective areas for shear
10.2 – Contribution of axial load to wall shear strength Vp
10.4 – Examples of locations where shear friction should be checked
10.5 – Relationship between ductility and masonry shear resisting mechanism
11.1 – Masonry interior beam column joints
12.1 – Subdivision of walls into primary and secondary systems
12.2 – Equivalent diagonal bracing action of masonry in-fill
12.3 – Ductility of in-fill frame based on maximum storey ductility of µS
C1 – Typical bolt detail
C2 – Edge distance requirements
Standards Council approval
- B1
Amendments
Previous versions
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Related Information
Building Code Compliance Document B1
Ministry: Ministry of Business, Innovation, and Employment - Building Systems Performance (BSP)
Section: VM1
Citation context:Building Code Compliance Document B1
Ministry: Ministry of Business, Innovation, and Employment - Building Systems Performance (BSP)
Section: VM1
Citation context:Refers to 4230:2004(NZS)A1.
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COMMITTEE REPRESENTATION
ACKNOWLEDGEMENT
© COPYRIGHT
AMENDMENTS
CONTENTS
REFERENCED DOCUMENTS
FOREWORD
Review of Standard
1 GENERAL
1.1 Scope
1.2 Interpretation
2 DEFINITIONS
2.1 General
3 LIMIT STATE DESIGN REQUIREMENTS AND MATERIAL PROPERTIES
3.1 Notation
3.2 Scope
3.3 General principles and requirements for construction
3.4 Material and strength properties
3.5 Limit state requirement for design 3.5.1
3.6 General principles, assumptions, and requirements for analysis and design
3.7 Principles and requirements for components designed for seismic loading
4 DESIGN FOR DURABILITY
4.1 Scope
4.2 Classification of sites into sea spray zones or corrosion zones
4.3 Governing reinforcing cover requirements
5 DESIGN FOR FIRE RESISTANCE
5.1 Notation
5.2 Scope
5.3 Design requirements
5.4 Fire resistance ratings for walls
5.5 Fire resistance ratings for beams
5.6 Fire resistance ratings for columns
5.7 Fire resistance ratings from fire tests
5.8 Fire resistance rating by calculation
5.9 Increase of fire resistance ratings by use of insulating materials
6 REINFORCEMENT
6.1 Notation
6.2 Scope
6.3 General principles and requirements for all structures
6.4 Principles and requirements additional to 6.3 for structures designed using a limited ductile or ductile seismic design philosophy
7 STRUCTURAL WALLS
7.1 Notation
7.2 Scope
7.3 General principles and requirements for all structures
7.4 Principles and requirements additional to 7.3 for structures designed using a limited ductile or ductile seismic design philosophy
8 BEAMS
8.1 Notation
8.2 Scope
8.3 General principles and requirements for all structures
8.4 Principles and requirements additional to 8.3 for structures designed using a limited ductile or ductile seismic design philosophy
9 COLUMNS
9.1 Notation
9.2 Scope
9.3 General principles and requirements for all structures
9.4 Principles and requirements additional to 9.3 for structures designed using a limited ductile or ductile seismic design philosophy
10 STRUCTURAL COMPONENT DESIGN
10.1 Notation
10.2 Flexure with or without axial load
10.3 Shear and torsion
11 BEAM-COLUMN JOINTS
11.1 Notation
11.2 Scope
11.3 General principles and requirements for all structures
11.4 Principles and requirements additional to 11.3 for joints in structures designed using a limited ductile or ductile seismic design philosophy
12 SECONDARY STRUCTURAL ELEMENTS
12.1 Notation
12.2 Scope
12.3 General principles and requirements
12.4 Secondary walls
12.5 Frames with masonry in-fill
12.6 Partitions
APPENDIX
A PRESTRESSED MASONRY
B DETERMINATION OF CONCRETE MASONRY COMPRESSIVE STRENGTHS
C BOLTED CONNECTIONS IN MASONRY
D PARTIAL FILL REQUIREMENTS
E SPECIFIC DESIGN FOR SMALL REINFORCED MASONRY BUILDINGS
F MASONRY VENEERS
Table
3.1 – Observation types, admissible use and design compressive strengths
3.2 – Design parameters for various design philosophies
4.1 – Masonry durability requirements
5.1 – Minimum wall thickness for fire resistance ratings for insulation
5.2 – Minimum cover to vertical reinforcement and tendons for stability of walls
5.3 – Stability requirements – Simply supported beams
5.4 – Stability requirements – Continuous beams
6.1 – Minimum diameters of bend for Class E steel bars to AS/NZS 4671 other than stirrup and tie bends
6.2 – Minimum diameters of bends for stirrups and ties for Class E steel bars to AS/NZS 4671
8.1 – Longitudinal reinforcement limits in a 390 mm x 190 mm masonry lintel beam
10.1 – Type dependent design strengths (MPa)
A1 – Maximum concrete masonry stresses and steel stress range for the design of sections at the serviceability limit state
C1 – Design strength in shear and tension of bolts cast into reinforced masonry
F1 – Maximum height of unreinforced masonry veneers which are subject to specific design (m)
Figure
3.1 – Shrinkage control joints
4.1 – Sea spray and corrosion zone map
5.1 – Standard furnace temperature-time curve
5.2 – Changes to moments in continuous beams during a fire
5.3 – Stability requirements – Columns
5.4 – Values of elastic modulus to be used in determining fire resistance rating by calculation
5.5 – Values of strength to be used in determining fire resistance rating by calculation
6.1 – Standard hooks
7.1 – Confining plates in potential plastic hinge regions
8.1 – Grout space dimensions
9.1 – Typical construction of masonry columns showing alternating courses
10.1 – Effective areas for shear
10.2 – Contribution of axial load to wall shear strength Vp
10.4 – Examples of locations where shear friction should be checked
10.5 – Relationship between ductility and masonry shear resisting mechanism
11.1 – Masonry interior beam column joints
12.1 – Subdivision of walls into primary and secondary systems
12.2 – Equivalent diagonal bracing action of masonry in-fill
12.3 – Ductility of in-fill frame based on maximum storey ductility of µS
C1 – Typical bolt detail
C2 – Edge distance requirements
Standards Council approval
- B1
Amendments
Previous versions
NZS 4230:2004
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.