Standard
UPDATE AVAILABLE
AS 1684.1-1999
[Superseded]Residential timber-framed construction, Part 1: Design criteria
Sets out design methods, assumptions and other criteria used in the preparation of the span tables, uplift forces and racking pressures contained within Parts 2, 3 and 4 of the AS 1684 series. It applies to the preparation of design data for residential timber-framed construction where the loading and performance requirements correspond to those for Class 1 and Class 10 buildings as defined by the Building Code of Australia.
Published: 05/12/1999
Pages: 111
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
PREFACE
1 SCOPE AND GENERAL
1.1 SCOPE AND APPLICATION
1.1.1 Scope
1.1.2 Application
1.2 REFERENCED DOCUMENTS
1.3 OTHER METHODS
1.4 BASIS FOR DESIGN
1.4.1 General
1.4.2 Geometric limitations
1.4.3 Design methods
1.4.4 System-based assumptions
1.4.5 Durability
1.4.6 Structural timber
1.4.7 Design properties
1.4.8 Effect of temperature on strength
1.4.9 Design loads
1.4.9.1 Dead loads
1.4.9.2 Live loads
1.4.9.3 Wind loads
1.4.9.4 Snow loads
1.4.9.5 Earthquake loads
1.4.9.6 Load combinations
1.4.10 Strength limit states
1.4.11 Serviceability limit states
1.5 DEFINITIONS
1.6 NOTATION
2 DESIGN OF ROOF MEMBERS
2.1 ROOF BATTENS
2.1.1 Description
2.1.2 Design for Safety
2.1.2.1 General consideration
2.1.2.2 Loads
2.1.2.3 Structural models and load categories for strength design
2.1.2.4 Member design capacity
2.1.3 Design for serviceability
2.1.3.1 Loads
2.1.3.2 Structural models and load categories for serviceability design
2.1.3.3 Calculation of deflection
2.1.3.4 Serviceability limits
2.2 RAFTERS
2.2.1 Description
2.2.2 Design for safety
2.2.2.1 General consideration
2.2.2.2 Loads
2.2.2.3 Structural models and load categories for strength design
2.2.2.4 Member design capacity
2.2.3 Design for serviceability
2.2.3.1 Loads
2.2.3.2 Structural models and load categories for serviceability design
2.2.3.3 Calculation of deflection
2.2.3.4 Serviceability limits
2.3 ROOF BEAMS—RIDGE OR INTERMEDIATE BEAMS
2.3.1 Description
2.3.2 Design for safety
2.3.2.1 General consideration
2.3.2.2 Loads
2.3.2.3 Structural models and load categories for strength design
2.3.2.4 Member design capacity
2.3.3 Design for serviceability
2.3.3.1 Loads
2.3.3.2 Structural models and load categories for serviceability design
2.3.3.3 Calculation of deflection
2.3.3.4 Serviceability limits
2.4 UNDERPURLINS
2.4.1 Description
2.4.2 Design for safety
2.4.2.1 General consideration
2.4.2.2 Loads
2.4.2.3 Structural models and load categories used for strength design
2.4.2.4 Member design capacity
2.4.3 Design for serviceability
2.4.3.1 Loads
2.4.3.2 Structural models and load categories for serviceability design
2.4.3.3 Calculation of deflection
2.4.3.4 Serviceability limits
2.5 STRUTTING BEAMS
2.5.1 Description
2.5.2 Design for safety
2.5.2.1 General consideration
2.5.2.2 Loads
2.5.2.3 Structural models and load categories for strength design
2.5.2.4 Member design capacity
2.5.3 Design for serviceability
2.5.3.1 Loads
2.5.3.2 Structural models and load categories for serviceability design
2.5.3.3 Calculation of deflection
2.5.3.4 Serviceability limits
2.6 COUNTER STRUTTING BEAMS
2.6.1 Description
2.6.2 Design for safety
2.6.2.1 General consideration
2.6.2.2 Loads
2.6.2.3 Structural models and load categories for strength design
2.6.2.4 Member design capacity
2.6.3 Design for serviceability
2.6.3.1 Loads
2.6.3.2 Structural models and load categories for serviceability design
2.6.3.3 Calculation of deflection
2.6.3.4 Serviceability limits
2.7 COMBINED HANGING STRUTTING BEAMS
2.7.1 Description
2.7.2 Design for safety
2.7.2.1 General consideration
2.7.2.2 Loads
2.7.2.3 Structural models and load categories for strength design
2.7.2.4 Member design capacity
2.7.3 Design for serviceability
2.7.3.1 Loads
2.7.3.2 Structural models and load categories for serviceability design
2.7.3.3 Calculation of deflection
2.7.3.4 Serviceability limits
2.8 CEILING BATTENS
2.8.1 Description
2.8.2 Design for safety
2.8.2.1 General consideration
2.8.2.2 Loads
2.8.2.3 Structural models and load categories for strength design
2.8.2.4 Member design capacity
2.8.3 Design for serviceability
2.8.3.1 Loads
2.8.3.2 Structural model for serviceability design
2.8.3.3 Calculation of deflection
2.8.3.4 Serviceability limit
2.9 CEILING JOISTS
2.9.1 Description
2.9.2 Design for safety
2.9.2.1 General consideration
2.9.2.2 Loads
2.9.2.3 Structural models and load categories for strength design
2.9.2.4 Member design capacity
2.9.3 Design for serviceability
2.9.3.1 Loads
2.9.3.2 Structural model for serviceability design
2.9.3.3 Calculation of deflection
2.9.3.4 Serviceability limits
2.10 HANGING BEAMS
2.10.1 Description
2.10.2 Design for safety
2.10.2.1 General consideration
2.10.2.2 Loads
2.10.2.3 Structural models and load categories for strength design
2.10.2.4 Member design capacity
2.10.3 Design for serviceability
2.10.3.1 Loads
2.10.3.2 Structural models and load categories for serviceability design
2.10.3.3 Calculation of deflection
2.10.3.4 Serviceability limits
2.11 COUNTER BEAMS
2.11.1 Description
2.11.2 Design for safety
2.11.2.1 General consideration
2.11.2.2 Loads
2.11.2.3 Structural models and load categories for strength design
2.11.2.4 Member design capacity
2.11.3 Design for serviceability
2.11.3.1 Loads
2.11.3.2 Structural models and load categories for serviceability design
2.11.3.3 Calculation of deflection
2.11.3.4 Serviceability limits
2.12 VERANDAH BEAMS
2.12.1 Description
2.12.2 Design for safety
2.12.2.1 General consideration
2.12.2.2 Loads
2.12.2.3 Structural models and load categories used for strength design
2.12.2.4 Member design capacity
2.12.3 Design for serviceability
2.12.3.1 Loads
2.12.3.2 Structural models and load categories for serviceability design
2.12.3.3 Calculation of deflection
2.12.3.4 Serviceability limits
3 DESIGN OF WALL MEMBERS
3.1 POSTS
3.1.1 Description
3.1.2 Design for safety
3.1.2.1 General consideration
3.1.2.2 Loads
3.1.2.3 Structural models and load categories for strength design
3.1.2.4 Member design capacity
3.1.3 Design for serviceability
3.2 LOADBEARING WALL STUDS
3.2.1 Description
3.2.2 Design for safety
3.2.2.1 General consideration
3.2.2.2 Loads
3.2.2.3 Structural models and load categories for strength design
3.2.2.4 Member design capacity
3.2.3 Design for serviceability
3.2.3.1 General consideration
3.2.3.2 Loads
3.2.3.3 Structural model for serviceability design
3.2.3.4 Calculation of deflection
3.2.3.5 Serviceability limit
3.3 WALL PLATES FOR LOADBEARING WALLS
3.3.1 Description
3.3.2 Design for safety
3.3.2.1 General consideration
3.3.2.2 Loads
3.3.2.3 Structural models and load categories used for strength design
3.3.2.4 Member design capacity
3.3.3 Design for serviceability
3.3.3.1 Loads
3.3.3.2 Structural model and load categories for serviceability design
3.3.3.3 Calculation of deflection
3.3.3.4 Serviceability limits
3.4 LINTELS
3.4.1 Description
3.4.2 Design of safety
3.4.2.1 General consideration
3.4.2.2 Loads
3.4.2.3 Structural models, design loads and load categories
3.4.2.4 Design action effects in bending and shear
3.4.2.5 Member design capacity
3.4.3 Design for serviceability
3.4.3.1 Loads
3.4.3.2 Structural models and load categories for serviceability design
3.4.3.3 Calculation of deflection
3.4.3.4 Serviceability limits
4 DESIGN OFF LOOR MEMBERS
4.1 FLOOR JOISTS
4.1.1 Description
4.1.2 Design for Safety
4.1.2.1 General consideration
4.1.2.2 Loads
4.1.2.3 Structural models and load categories for strength
4.1.2.4 Member design capacity
4.1.3 Design for serviceability
4.1.3.1 General consideration
4.1.3.2 Loads
4.1.3.3 Structural models and load categories for serviceability design
4.1.3.4 Calculation of deflection
4.1.3.5 Serviceability limits
4.2 BEARERS
4.2.1 Description
4.2.2 Design for safety
4.2.2.1 General consideration
4.2.2.2 Loads
4.2.2.3 Structural models and load categories for strength
4.2.2.4 Member design capacity
4.2.3 Design for serviceability
4.2.3.1 Loads
4.2.3.2 Structural models and load categories for serviceability design
4.2.3.3 Calculation of deflection
4.2.3.4 Serviceability limits
5 DETERMINATION OF UPLIFT FORCES
5.1 SCOPE AND GENERAL
5.1.1 Scope of Section
5.1.2 General
5.2 DETERMINATION OF NET UPLIFT PRESSURES
5.2.1 Roof uplift
5.2.2 Net uplift pressures at bottom plate or subfloor level
6 PRESSURES FOR DETERMINATION OF RACKING FORCES
6.1 SCOPE AND GENERAL
6.1.1 Scope of Section
6.1.2 Notation
6.1.3 Assumptions
6.2 EQUIVALENT PRESSURES ON PROJECTED AREAS
6.2.1 For flat wall surfaces, gable or skillion roof ends
6.2.2 For side elevations, single or upper storey, gable or hip-ended roofs
6.2.3 Side elevation, lower storey of two storeys or subfloor, gable or hip-ended roof
6.2.4 End elevation, single or upper storey, hip-ended roof
6.2.5 End elevation, lower storey of two storeys, hip-ended roof
APPENDIX A
APPENDIX B
B1 WIND CLASSIFICATIONS
B2 FREE STREAM DYNAMIC GUST PRESSURE
APPENDIX C
C1 GENERAL
C2 EFFECT OF BIRDSMOUTH NOTCH ON RIGIDITY
C3 LOAD SHARING FOR PARALLEL RAFTER OVERHANGS
C4 RAFTER STRENGTH AT BIRDSMOUTH NOTCH
C4.1 Bending Strength
C4.2 Shear strength at birdsmouth notch
C4.3 Combined bending and shear (fracture strength) at the birdsmouth notch
Amendment control sheet
AS 1684.1-1999
Amendment No. 1 (2002)
Correction
Cited references in this standard
[Available Superseded]
Minimum design loads on structures (known as the SAA Loading Code), Part 1: Dead and live loads and load combinations
[Available Superseded]
Minimum design loads on structures (known as the SAA Loading Code), Part 2: Wind loads
[Superseded]
Minimum design loads on structures (known as the SAA Loading Code), Part 3: Snow loads
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