AS 1684 SUPP 4-1992

1 - AS 1684-1992 NATIONAL TIMBER FRAMING CODE
4 - PREFACE
5 - CONTENTS
7 - SECTION 1 SCOPE AND GENERAL
7 - 1.1 SCOPE
7 - 1.2 REFERENCED DOCUMENTS
7 - 1.3 USE OF ALTERNATIVE MATERIALS OR METHODS
7 - 1.4 DEFINITIONS
7 - 1.4.1 Coupled roof
7 - 1.4.2 Deep-joisted floors
7 - 1.4.3 Grade
7 - 1.4.4 Stress grade
7 - 1.4.5 Mechanically stress-graded timber
7 - 1.4.6 Visually stress-graded timber
7 - 1.4.7 Spacing
7 - 1.4.8 Span
7 - 1.4.9 Continuous span members
10 - 1.4.10 Rafter span
10 - 1.4.11 Stud height
10 - 1.4.12 Two-storey construction
10 - 1.4.13 Non-load-bearing wall
10 - 1.4.14 Load-bearing wall
10 - 1.5 DESIGN
10 - 1.5.1 Design criteria
10 - 1.5.2 Design basis
10 - 1.5.3 Design loads
11 - 1.6 CLASSIFICATION OF ROOFING
11 - 1.7 LONG SPAN AND CONTINUOUS SPAN MEMBERS
11 - 1.7.1 Long span members
11 - 1.7.2 Continuous span members
11 - 1.8 TABLES
11 - 1.8.1 Tables of spans and spacing for stress grade
11 - 1.8.2 Use of tables for two storey construction
11 - 1.8.3 Interpolation in use of tables
11 - 1.8.4 Interchanging hardwood and softwood tables
12 - 1.8.5 Application of tables to design gust wind speeds higher than 33m/s
12 - 1.9 VERTICAL LAMINATION
12 - 1.10 STORAGE AND HANDLING OF TIMBER
12 - 1.11 MATERIALS
12 - 1.11.1 Timber
13 - 1.11.2 Particle board
13 - 1.11.3 Structural plywood
13 - 1.11.4 Wood block parquetry flooring
13 - 1.11.5 Wood mosaic parquet flooring
13 - 1.11.6 Finger-jointed structural members
14 - SECTION 2 SUBSTRUCTURE
14 - 2.1 SITE PREPARATION
14 - 2.2 PROTECTION OF TIMBER IN SERVICE
14 - 2.2.1 Ventilation of subfloor spaces
14 - 2.2.2 Termite protection
14 - 2.2.3 Durability classes
14 - 2.3 FOUNDATIONS
15 - 2.4 FOOTINGS
15 - 2.4.1 General
16 - 2.4.2 Timber sole plates
16 - 2.4.3 Sizes of footings and sole plates
16 - 2.5 TIMBER STUMPS AND POSTS
16 - 2.5.1 General
17 - 2.5.2 Timbers in contact with ground
17 - 2.5.3 Timbers not in contact with ground
17 - 2.5.4 Lateral stability
20 - SECTION 3 TIMBER FLOOR FRAMING AND FLOORING
20 - 3.1 SCOPE OF SECTION
20 - 3.2 MEMBER SIZES
20 - 3.2.1 Bearers
20 - 3.2.2 Joists
20 - 3.3 PERFORMANCE OF FLOOR TIMBERS
20 - 3.3.1 Protection and durability of floor timbers
20 - 3.3.2 Shrinkage of floor framing
20 - 3.4 DRILLING AND NOTCHING OF MEMBERS
21 - 3.5 FLOOR BEARERS
21 - 3.5.1 General requirements
23 - 3.5.2 Location of bearers
23 - 3.6 FLOOR JOISTS
23 - 3.6.1 General requirements
24 - 3.6.2 Deep-joisted floors
24 - 3.6.3 Floor joists under walls
26 - 3.7 OFFSET AND CANTILEVERED FLOOR JOISTS AND BEARERS
26 - 3.7.1 Under offset walls
26 - 3.7.2 Balconies
26 - 3.8 OPENINGS IN FLOORS
26 - 3.8.1 Joints between members
26 - 3.8.2 Trimming of openings
26 - 3.9 FLOORING
26 - 3.9.1 Types of flooring
26 - 3.9.2 Moisture content
26 - 3.9.3 Flooring systems
28 - 3.9.4 Structural strip flooring
29 - 3.9.5 Structural plywood sheet flooring
30 - 3.9.6 Particle board sheet flooring
30 - 3.9.7 Non-structural flooring
31 - SECTION 4 TIMBER WALL FRAMING
31 - 4.1 GENERAL
31 - 4.1.1 Erection
31 - 4.1.2 Effective roof length (EL)
31 - 4.1.3 Effect of eaves overhang
31 - 4.2 WALL PLATES
31 - 4.2.1 Size and grade
31 - 4.2.2 Joining of plates
31 - 4.2.3 Local stiffening of plates
33 - 4.2.4 Trenchings or housings for studs
33 - 4.3 STUDS
33 - 4.3.1 General
33 - 4.3.2 Straightening of studs
34 - 4.3.3 Housing, notching or drilling
35 - 4.3.4 Studs at wall junctions
36 - 4.3.5 Studs at sides of openings
37 - 4.3.6 Studs supporting concentrations of loading
37 - 4.3.7 Studs for gable or skillion ends
38 - 4.4 LINTELS TO OPENINGS
38 - 4.5 EAVES BEAMS AND VERANDAH PLATES
38 - 4.6 VERANDAH POSTS
38 - 4.7 NOGGINGS
38 - 4.8 TEMPORARY BRACING OF STUD WALLS
38 - 4.9 PERMANENT BRACING OF STUD WALLS
38 - 4.9.1 General
41 - 4.9.2 Building geometry
41 - 4.9.3 Fixing of bracing units to sub-floor
41 - 4.9.4 Fixing of bracing units to ceiling or roof framing
41 - 4.9.5 Type A bracing unit
44 - 4.9.6 Type B bracing unit
46 - 4.9.7 Minimum number and distribution of bracing units
48 - 4.10 FRAMING AROUND CHIMNEYS AND FLUES
48 - 4.11 CLADDING, LININGS AND JOINERY
48 - 4.12 INSULATION AND SARKING
51 - 4.13 NON LOAD-BEARING INTERNAL WALLS
53 - SECTION 5 TIMBER ROOF FRAMING
53 - 5.1 SCOPE OF SECTION
53 - 5.2 COUPLED ROOFS
53 - 5.3 CONVENTIONAL HIPPED AND GABLED ROOFS
53 - 5.3.1 Wall plates
53 - 5.3.2 Ceiling joists
54 - 5.3.3 Hanging beams
55 - 5.3.4 Common rafters
55 - 5.3.5 Ridge boards
55 - 5.3.6 Hip rafters
56 - 5.3.7 Valley rafters
57 - 5.3.8 Valley boards
57 - 5.3.9 Hip and valley rafter overhangs
57 - 5.3.10 Under purlins
57 - 5.3.11 Roof strutting
62 - 5.3.12 Collar ties
63 - 5.3.13 Lateral bracing to tops of external walls
63 - 5.3.14 Wind bracing
63 - 5.3.15 Eaves constructions
64 - 5.3.16 Gable or verge construction
64 - 5.3.17 Roofing battens
64 - 5.4 PURLINS
64 - 5.5 ROOF BEAMS
64 - 5.5.1 General
64 - 5.5.2 Birdsmouthed roof beams
64 - 5.6 NON-TRAFFICABLE ROOFS
65 - 5.7 ROOFING MATERIAL GROUPS
67 - SECTION 6 FIXING REQUIREMENTS
67 - 6.1 SCOPE OF SECTION
67 - 6.2 METHOD OF NAILING
67 - 6.2.1 General
67 - 6.2.2 Skew nailing
67 - 6.3 DIAMETER OF NAILS
67 - 6.4 PENETRATION OF NAILS
67 - 6.5 GENERAL FIXING REQUIREMENTS
67 - 6.6 SPECIFIC TIE-DOWN REQUIREMENTS
67 - 6.6.1 General
67 - 6.6.2 Procedure
67 - 6.6.3 Rafter fixing at ridge
73 - 6.7 VERTICALLY LAMINATED BEAMS
74 - 6.8 ALTERNATIVE METHODS OF FIXING
74 - 6.9 CORROSION PROTECTION
75 - APPENDIX A - LIST OF REFERENCED DOCUMENTS
76 - APPENDIX B - STORAGE AND HANDLING OF TIMBER
76 - B1 GENERAL
76 - B2 FRAMING TIMBERS
76 - B2.1 Unseasoned framing material
76 - B2.2 Seasoned framing material
76 - B3 FLOORING, CLADDING AND MOULDINGS
76 - B4 JOINERY
77 - APPENDIX C - SITE PREPARATION
77 - C1 GENERAL
77 - C2 SITE DRAINAGE
77 - C3 DEAD TREES, TREE STUMPS AND WOOD DEBRIS
77 - APPENDIX D - AUSTRALIAN STANDARDS APPLICABLE TO TIMBER FLOORING
78 - APPENDIX E - GUIDANCE ON PLATFORM FLOOR CONSTRUCTION
78 - E1 EXPOSURE TO WEATHER
78 - E2 COVERED AND UNCOVERED FLOORS
78 - E3 FLOOR PROTECTION
78 - E4 FLOOR DRAINAGE
79 - APPENDIX F - EXAMPLE OF BRACING REQUIREMENTS FOR BUILDING
79 - F1 SCOPE
81 - F2 CALCULATION OF NUMBER OF BRACING UNITS
81 - F2.1 General
81 - F2.2 Procedure
81 - F2.3 Calculations
86 - APPENDIX G - STRENGTH OF TIE-DOWN DETAILS
96 - APPENDIX H - EXAMPLE OF SPECIFIC TIE-DOWN REQUIREMENTS FOR SHEET ROOFS
96 - H1 SCOPE
96 - H2 BATTENS TO TRUSSES
96 - H3 TRUSS TO TOP PLATE
96 - H4 TOP PLATE TO STUD AND STUD TO BOTTOM PLATE
96 - H5 BOTTOM PLATE TO SLAB
98 - APPENDIX I - SUMMARIES OF FIXING AND TIE-DOWN REQUIREMENTS
98 - I1 SCOPE
105 - INDEX
107 - NATIONAL TIMBER FRAMING CODE SUPPLEMENTS (0, 2 to 5, 9, 15)
107 - AS 1684 Supp0-1992 GENERAL INTRODUCTION AND INDEX (SUPPLEMENT TO AS 1684-1992)
109 - GENERAL INTRODUCTION
111 - AS 1684 Supp2-1992 TIMBER FRAMING SPAN TABLES-UNSEASONED TIMBER-STRESS GRADE F5 ....
137 - AS 1684 Supp3-1992 TIMBER FRAMING SPAN TABLES-UNSEASONED TIMBER-STRESS GRADE F7 .....
162 - AS 1684 Supp4-1992 TIMBER FRAMING SPAN TABLES-UNSEASONED TIMBER-STRESS GRADE F8 .....
188 - AS 1684 Supp5-1992 TIMBER FRAMING SPAN TABLES-UNSEASONED TIMBER-STRESS GRADE F11.....
216 - AS 1684 Supp9-1992 TIMBER FRAMING SPAN TABLES-SEASONED SOFTWOOD-STRESS GRADE F5.....
240 - AS 1684 Supp15-1992 TIMBER FRAMING SPAN TABLES-SEASONED HARDWOOD-STRESS GRADE F17...

The supplements are for use with the National Timber Framing Code. They are computer-calculated tables according to stress grade and condition of dryness, which give the maximum allowable span for Australia and imported species according to their intended use or purpose in the building frame. Not all of these supplements will be required by designers. The content of each supplement is technically unchanged from the previous edition. The list of tables, list of supplements and scope and application clauses have been deleted from each supplement and incorporated into Supplement 0. Minor editorial changes have been made to the title and headings to some tables, for clarity. Persons who already have supplements will not need to purchase the revised supplements. Supplements 2, 3, 4, 5, 9 and 15 are bound with the Standard.

First published as AS 1684 Supplement 4-1975.
Second edition 1992.