1 - AS 4440-1997 INSTALLATION OF NAILPLATED TIMBER TRUSSES
4 - PREFACE
5 - CONTENTS
7 - SECTION 1 SCOPE AND GENERAL
7 - 1.1 SCOPE
7 - 1.2 APPLICATION
7 - 1.3 REFERENCED DOCUMENTS
8 - 1.4 USE OF ALTERNATIVE MATERIALS OR METHODS
8 - 1.5 DEFINITIONS
8 - 1.5.1 Approved
8 - 1.5.2 Approved specification
8 - 1.5.3 Boxed eaves
8 - 1.5.4 Camber
8 - 1.5.5 Eaves
8 - 1.5.6 Gable-end truss
8 - 1.5.7 Galvanized steel
8 - 1.5.8 Girder truss
8 - 1.5.9 Nailplates
8 - 1.5.10 Overhang
8 - 1.5.11 Pitching point
9 - 1.5.12 Raking eaves
9 - 1.5.13 Raking truss
9 - 1.5.14 Regulatory authority
9 - 1.5.15 Reinforced-head nails
9 - 1.5.16 Spacing
9 - 1.5.17 Span
9 - 1.5.18 Station
9 - 1.5.19 Steel-brace
9 - 1.5.20 Structural fascia
9 - 1.5.21 Timber truss
9 - 1.5.22 Truss engineer
9 - 1.5.23 Valley (saddle) trusses
9 - 1.5.24 Verge overhang
9 - 1.5.25 Waling plate
13 - 1.6 LOADS
13 - 1.7 DOCUMENTATION AT APPROVAL STAGE AND DELIVERY
14 - SECTION 2 SUPPORTING STRUCTURES
14 - 2.1 GENERAL
14 - 2.2 WALLS
14 - 2.2.1 Load-bearing walls
14 - 2.2.2 Non-load-bearing walls
15 - 2.2.3 Fixing to top plates of non-load-bearing walls
17 - SECTION 3 TRUSS INSTALLATION
17 - 3.1 TRUSS LAYOUT
17 - 3.2 TEMPORARY BRACING
18 - 3.3 INSTALLATION TOLERANCES
18 - 3.3.1 General
18 - 3.3.2 Bow
18 - 3.3.3 Plumb
18 - 3.3.4 Spacing
19 - 3.4 PLASTERBOARD FIXED DIRECTLY TO BOTTOM CHORDS
19 - 3.5 TIE-DOWN REQUIREMENTS
19 - 3.6 MULTIPLE (MULTI-PLY) TRUSS
19 - 3.7 TRUSS MODIFICATION
19 - 3.8 REJECTION CRITERIA
19 - 3.9 TRANSPORT, STORAGE, LIFTING AND HANDLING
20 - SECTION 4 ROOF BRACING
20 - 4.1 GENERAL
20 - 4.2 ROOF BATTENS
20 - 4.2.1 General
20 - 4.2.2 Intermediate battens for valley intersection
21 - 4.3 TOP CHORD BRACING
21 - 4.3.1 General
21 - 4.3.2 Steel-brace
22 - 4.3.3 Steel-brace for gable roof
27 - 4.3.4 Steel-brace for hip roof
30 - 4.3.5 Steel-brace for dual-pitched roof
30 - 4.3.6 Steel-brace for bell roof
31 - 4.3.7 Steel-brace for mono-pitched roof
31 - 4.3.8 Fixing
34 - 4.4 BOTTOM CHORD BRACING
34 - 4.4.1 General
34 - 4.4.2 Ceiling battens
35 - 4.4.3 Bottom chord ties
35 - 4.5 WEB BRACING
37 - SECTION 5 TRUSS CONNECTION
37 - 5.1 GENERAL
37 - 5.2 HIP ENDS
37 - 5.2.1 Hip-end connection for low wind (design wind speed up to 41 m/s, non-cyclonic area)
40 - 5.2.2 Hip-end connection for high wind (design wind speed from 41 m/s to 60 m/s, cyclonic area)
43 - 5.3 GIRDER TRUSSES
43 - 5.3.1 Girder brackets (truss boots)
44 - 5.3.2 Waling plates for Dutch-hip girder
45 - 5.4 VALLEY (SADDLE) TRUSSES
45 - 5.4.1 Valley truss connection for low wind (design wind speed up to 41 m/s, non-cyclonic area)
46 - 5.4.2 Valley truss connection for high wind (design wind speed from 41 m/s to 60 m/s, cyclonic area)
47 - SECTION 6 OVERHANGS
47 - 6.1 STANDARD OVERHANGS
47 - 6.1.1 General
47 - 6.1.2 Raking eaves in hip corner
47 - 6.1.3 Boxed eaves
48 - 6.2 GABLE VERGE
48 - 6.2.1 Gable-end truss
49 - 6.2.2 Verge overhang
51 - 6.3 BOXED GABLE ENDS
51 - 6.4 VERANDAHS
51 - 6.5 PERGOLAS
52 - APPENDIX A - DOCUMENTATION AT APPROVAL STAGE AND ON DELIVERY
52 - A1 INTRODUCTION
52 - A2 APPROVAL STAGE
52 - A3 DELIVERY
52 - A4 CHECK LIST
54 - APPENDIX B - RECOMMENDED PRACTICE FOR TRUSS INSTALLATION
54 - B1 INTRODUCTION
54 - B2 CAMBERS
54 - B3 FIX OF CORNICE
54 - B4 BEARING WIDTH
55 - APPENDIX C - RECOMMENDATIONS FOR TEMPORARY BRACING
55 - C1 GENERAL
55 - C2 HIP OR DUTCH-HIP END ROOF
56 - C3 GABLE-END ROOF
57 - APPENDIX D - TRANSPORT, STORAGE, LIFTING AND HANDLING OF TRUSSES
57 - D1 SCOPE AND GENERAL
57 - D2 TRANSPORT
57 - D3 STORAGE
57 - D4 LIFTING AND HANDLING
59 - APPENDIX E - TYPICAL SPECIFICATION FOR, AND EXAMPLE OF, A STEEL-BRACE
60 - APPENDIX F - PERMANENT BOTTOM CHORD TIES
63 - APPENDIX G - FIXING DETAILS FOR TYPICAL GIRDER BRACKETS (TRUSS BOOTS)