AS 3623-1993

1 - AS 3623-1993 DOMESTIC METAL FRAMING
4 - PREFACE
5 - CONTENTS
6 - SECTION 1 SCOPE AND GENERAL
6 - 1.1 SCOPE
6 - 1.2 REFERENCED DOCUMENTS
6 - 1.3 DEFINITIONS
6 - 1.3.1 Balcony
6 - 1.3.2 Bearer
6 - 1.3.3 Bracing
6 - 1.3.4 Ceiling batten
6 - 1.3.5 Chord
6 - 1.3.6 Floor joist
6 - 1.3.7 Heel (knee)
6 - 1.3.8 Hold-down fixings
7 - 1.3.9 Internal lining
7 - 1.3.10 Internal truss member (web)
7 - 1.3.11 Jamb stud
7 - 1.3.12 Lintel
7 - 1.3.13 Load redistribution
7 - 1.3.14 Noggin
7 - 1.3.15 Non-load-bearing walls
7 - 1.3.16 Plate
7 - 1.3.17 Racking
7 - 1.3.18 Roof or tile batten
7 - 1.3.19 Sheet roofing
7 - 1.3.20 Span
7 - 1.3.21 Stud
7 - 1.3.22 Tiled roof
7 - 1.3.23 Truss
7 - 1.3.24 Truss panel points
7 - 1.3.25 Wall tie
7 - 1.4 NOTATION
9 - SECTION 2 STRENGTH REQUIREMENTS - LIMIT STATE DESIGN
9 - 2.1 GENERAL
9 - 2.2 LIMITATIONS
9 - 2.3 LOAD REDISTRIBUTION
9 - 2.4 ROOF SYSTEMS
9 - 2.4.1 Roofing battens
9 - 2.4.2 Ceiling battens
9 - 2.4.3 Roof trusses or rafters
10 - 2.5 WALL SYSTEMS
10 - 2.5.1 Studs in load-bearing walls
10 - 2.5.1.1 Single-storey or upper-storey studs
10 - 2.5.1.2 Lower storey studs
10 - 2.5.1.3 Studs at the side of openings
11 - 2.5.2 Top wall plates in load-bearing walls
11 - 2.5.2.1 Single-storey or upper-storey top wall plates
11 - 2.5.2.2 Lower-storey top wall plates
11 - 2.5.2.3 Top wall plates with studs located directly under trusses or floor joists
11 - 2.5.3 Lintels in load-bearing walls
11 - 2.5.3.1 Single-storey or upper-storey lintels
12 - 2.5.3.2 Lower-storey lintels
12 - 2.6 FLOOR SYSTEMS
12 - 2.6.1 General
12 - 2.6.2 Floor joists
12 - 2.6.3 Bearers under load-bearing walls
12 - 2.6.3.1 Single-storey or upper-storey bearers
13 - 2.6.3.2 Lower-storey bearers
13 - 2.6.4 Bearers not under load-bearing walls
13 - 2.6.5 Bearers or joists supporting a balcony
14 - 2.7 BRACING SYSTEMS
14 - 2.7.1 Permanent bracing systems
14 - 2.7.2 Wall bracing
15 - SECTION 3 STRENGTH REQUIREMENTS - PERMISSIBLE STRESS DESIGN
15 - 3.1 GENERAL
15 - 3.2 LIMITATIONS
15 - 3.3 LOAD REDISTRIBUTION
15 - 3.4 ROOF SYSTEMS
15 - 3.4.1 Roofing battens
15 - 3.4.2 Ceiling battens
16 - 3.4.3 Roof trusses or rafters
16 - 3.5 WALL SYSTEMS
16 - 3.5.1 Studs in load-bearing walls
16 - 3.5.1.1 Single-storey or upper-storey studs
16 - 3.5.1.2 Lower-storey studs
17 - 3.5.1.3 Studs at the side of openings
17 - 3.5.2 Top wall plates in load-bearing walls
17 - 3.5.2.1 Single-storey or upper-storey top wall plates
17 - 3.5.2.2 Lower-storey top wall plates
17 - 3.5.2.3 Top wall plates with studs located directly under trusses or floor joists
17 - 3.5.3 Lintels in load-bearing walls
17 - 3.5.3.1 Single-storey or upper-storey lintels
18 - 3.5.3.2 Lower-storey lintels
18 - 3.6 FLOOR SYSTEMS
18 - 3.6.1 General
18 - 3.6.2 Floor joists
19 - 3.6.3 Bearers under load-bearing walls
19 - 3.6.3.1 Single-storey or upper-storey bearers
19 - 3.6.3.2 Lower-storey bearers
19 - 3.6.4 Bearers not under load-bearing walls
20 - 3.6.5 Bearers or joists supporting a balcony
20 - 3.7 BRACING SYSTEMS
20 - 3.7.1 Permanent bracing systems
20 - 3.7.2 Wall bracing
21 - SECTION 4 SERVICEABILITY REQUIREMENTS
21 - 4.1 GENERAL
21 - 4.2 ROOF SYSTEMS
21 - 4.2.1 Roof battens
21 - 4.2.2 Ceiling battens
21 - 4.2.3 Roof trusses and rafters
22 - 4.3 WALL SYSTEMS
22 - 4.3.1 Studs
22 - 4.3.2 Load-bearing top plates in single storey or upper storey
22 - 4.3.3 Load-bearing top plates in lower storey
23 - 4.3.4 Lintels in single storey or upper storey
23 - 4.3.5 Lintels in lower storey
23 - 4.4 FLOOR SYSTEMS
23 - 4.4.1 General
23 - 4.4.2 Static serviceability requirements
23 - 4.4.2.1 Floor joists
24 - 4.4.2.2 Bearers
24 - 4.4.2.3 Bearers or joists supporting a balcony
24 - 4.4.3 Dynamic serviceability requirements
24 - 4.4.3.1 Limitations
24 - 4.4.3.2 Floor response
26 - SECTION 5 DESIGN VERIFICATION
26 - 5.1 VERIFICATION OF DESIGN
26 - 5.2 LOAD TESTING OF STEEL-FRAMED STRUCTURES
26 - 5.2.1 General
26 - 5.2.2 Test specimens
26 - 5.2.3 Test loads
27 - 5.2.4 Test requirements
27 - 5.2.5 Cyclone areas
27 - 5.2.6 Criteria for acceptance
27 - 5.2.7 Acceptance of production units
28 - APPENDIX A - COMMENTARY
28 - A2 STRENGTH REQUIREMENTS - LIMIT STATE DESIGN/PERMISSIBLE STRESS DESIGN
28 - A2.1 General
28 - A2.2 Limitations
28 - A2.3 Load redistribution
28 - A2.4 Roof systems
29 - A2.4.1 Roofing battens
29 - A2.4.2 Ceiling battens
29 - A2.4.3 Roof trusses
29 - A2.5 Wall systems
29 - A2.5.1 Studs in load-bearing walls
30 - A2.5.2 Top wall plates in load-bearing walls
30 - A2.5.3 Lintels in load-bearing walls
30 - A2.6 Floor systems
30 - A2.6.1 General
30 - A2.6.2 Floor joists
30 - A2.6.3 Bearers under load-bearing walls
31 - A2.6.5 Bearers or joists supporting a balcony
31 - A2.7 Bracing systems
31 - A3 STRENGTH REQUIREMENTS - PERMISSIBLE STRESS DESIGN
31 - A4 SERVICEABILITY REQUIREMENTS
31 - A4.1 General
32 - A4.2 Roof systems
32 - A4.2.1 Roof battens
32 - A4.2.2 Ceiling battens
32 - A4.2.3 Roof trusses and rafters
33 - A4.3 Walls
33 - A4.3.1 Studs
33 - A4.3.2 Load-bearing top plates in single storey or upper storey
33 - A4.3.3 Load-bearing top plates in lower storey
33 - A4.3.4 Lintels in single storey or upper storey
33 - A4.3.5 Lintels in lower storey
33 - A4.4 Floor systems
33 - A4.4.1 General
33 - A4.4.2 Static serviceability requirements
34 - A4.4.3 Dynamic serviceability requirements
35 - APPENDIX B - LOAD COMBINATIONS FOR STRENGTH
35 - B1 INTRODUCTION
35 - B4 ROOF SYSTEMS
35 - B4.1 Roofing battens
36 - B4.2 Ceiling battens
36 - B4.3 Roof trusses or rafters
37 - B5 WALL SYSTEMS
37 - B5.1 Studs in load-bearing walls
37 - B5.1.1 Single-storey or upper-storey studs
38 - B5.1.2 Lower-storey studs
39 - B5.1.4 Noggins
39 - B5.2 Top wall plates in load-bearing walls
39 - B5.2.1 Single-storey or upper-storey top wall plates
40 - B5.2.2 Lower-storey top wall plates
41 - B5.3 Lintels in load-bearing walls
41 - B5.3.1 Single-storey or upper-storey lintels
42 - B5.3.2 Lower-storey lintels
42 - B6 FLOOR SYSTEMS
42 - B6.2 Floor joists
43 - B6.3 Bearers under load-bearing walls
43 - B6.3.1 Single-storey or upper-storey bearers
43 - B6.3.2 Lower-storey bearers
44 - B6.4 Bearers not under load-bearing walls
44 - B6.5 Bearers or joists supporting a balcony
46 - APPENDIX C - LOAD REDISTRIBUTION FACTOR
49 - APPENDIX D - DYNAMIC PERFORMANCE OF LIGHT FLOOR SYSTEMS
49 - D1 GENERAL
49 - D2 RESPONSE TO A 1 kN STATIC LOAD
50 - D3 LOWEST NATURAL FREQUENCY
50 - D4 MAXIMUM IMPACT VELOCITY

Specifies the loads and load combinations to be applied to the various components (e.g. studs, joists, etc.) of a metal frame for a domestic building up to two storeys in height and a roof pitch of up to 35 degrees. Requirements are also specified for the dynamic performance of floors.

This Standard sets out the performance requirements, in terms of structural adequacy and serviceability, for the framing of domestic buildings of up to two storeys in height and roof pitches of up to 35.Alternative methods of assessing structural adequacy using either permissible stress or limit state methods are provided in Sections 2 and 3, respectively. This Standard does not consider the effects of corrosion.NOTES:1 A Commentary is provided in Appendix A.2 This Standard should be read in conjunction with AS 4055 and the relevant Parts of AS 1170.3 In potentially corrosive environments, advice should be obtained from the respective manufacturers on appropriate protective measures.

First published as AS 3623-1993.