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AS/NZS 4438:1997

[Current]

Height adjustable swivel chairs

Specifies requirements, selection and evaluation criteria for height adjustable swivel chairs. The Standard is the first of a series to be developed under a memorandum of understanding between Standards Australia and the Australasian Furnishing Research and Development Institute Limited (AFRDI).
Published: 05/01/1997
Pages: 61
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
PREFACE
FOREWORD
1 SCOPE AND GENERAL
1.1 SCOPE
1.2 OBJECTIVE
1.3 COMPARISON WITH OTHER NATIONAL STANDARDS
1.4 REFERENCED DOCUMENTS
1.5 DEFINITIONS
1.6 CLASSIFICATION BY FUNCTION
1.7 CLASSIFICATION BY STRENGTH AND DURABILITY
1.8 STABILITY
2 GENERAL REQUIREMENTS
2.1 COMPONENTS AND MATERIALS
2.1.1 Chair general
2.1.2 Chair components general
2.1.3 Footrings, castors and gas springs
2.1.4 Actuating mechanism and control base
2.1.5 Pedestal base
2.1.6 Timber
2.1.7 Metal
2.1.8 Burning behaviour
2.1.9 Filling material
2.1.10 Care
2.2 SPECIFIC REQUIREMENTS RELATED TO END USE
2.3 TOLERANCES
3 FUNCTIONAL CRITERIA
3.1 GENERAL
3.1.1 Postural support
3.1.2 Corners and edges
3.1.3 Adjusting devices
3.1.4 Connections
3.1.5 Soiling
3.1.6 Underframe and base
3.1.7 Upholstery and covering
3.1.8 Seat height adjustment
3.2 DIMENSIONAL REQUIREMENTS—DEFINITIONS OF REFERENCE POINTS, AXES AND PLANES
3.2.1 General
3.2.2 Point ‘A’
3.2.3 Back supporting point ‘S’
3.2.4 Axis of rotation
3.2.5 Reference planes
3.3 DIMENSIONAL REQUIREMENTS—DEFINITION OF FUNCTIONAL DIMENSIONS
3.3.1 General
3.3.2 Seat height ‘a’
3.3.3 Seat depth ‘b’
3.3.4 Depth of seat surface ‘c’
3.3.5 Seat width ‘d’
3.3.6 Inclination of seat surface ‘e’
3.3.7 Height ‘f’ of the backrest supporting point ‘S’ above the seat surface
3.3.8 Height of the backrest ‘g’
3.3.9 Height ‘h’ of the upper edge of the back pad above the seat surface
3.3.10 Backrest width ‘i’
3.3.11 Horizontal radius ‘k’ of backrest
3.3.12 Vertical radius ‘l’ of backrest
3.3.13 Maximum rearward projection ‘m’ of the backrest
3.3.14 Length of armrest ‘n’
3.3.15 Width ‘o’ of armrest
3.3.16 Height ‘p’ of armrest above seat
3.3.17 Distance ‘q’ from the front of the armrests to the front edge of seat surface
3.3.18 Clear width ‘r’ between the armrests
3.3.19 Maximum off-set ‘λ’ of chair underframe
3.3.20 Stability dimension ‘t’
3.3.21 Dimension ‘w’
4 TESTING—STRENGTH AND DURABILITY REQUIREMENTS
4.1 GENERAL
4.2 TEST PREREQUISITES
4.2.1 General prerequisites
4.2.2 Seat loading point (SLP) and back loading point (BLP) determination
4.3 PERFORMANCE REQUIREMENTS
4.3.1 Seat static load test
4.3.2 Back static load test with flexibility assessment
4.3.3 Arm sideways static load test
4.3.4 Arm downwards static load test
4.3.5 Seat and back fatigue test
4.3.6 Seat impact test
4.3.7 Back impact test
4.3.8 Arm impact test
4.3.9 Drop test
4.3.10 Swivelling test
5 TESTING—STABILITY REQUIREMENTS
5.1 GENERAL
5.2 OVERTURNING PERFORMANCE REQUIREMENTS
5.2.1 Rearwards overturning (all chairs)
5.2.2 Rearwards overturning of tilting or reclining chairs
5.2.3 Accidental rearward overturning
5.3 ROLLING STABILITY PERFORMANCE REQUIREMENT
6 MARKING, INSTRUCTIONS AND TEST REPORT
6.1 GENERAL
6.2 INSTRUCTIONS FOR USE
6.3 MARKING
6.4 TEST REPORT
APPENDIX A
A1 SCOPE
A2 PRINCIPLE
A3 APPARATUS
A4 PROCEDURE
APPENDIX B
B1 SCOPE
B2 PRINCIPLE A
B3 APPARATUS
B4 PROCEDURE
B5 REPORT
APPENDIX C
C1 SCOPE
C2 PRINCIPLE
C3 APPARATUS
C4 PROCEDURE
C5 REPORT
APPENDIX D
D1 SCOPE
D2 PRINCIPLE
D3 APPARATUS
D4 PROCEDURES
D5 REPORT
APPENDIX E
E1 SCOPE
E2 PRINCIPLE
E3 APPARATUS
E4 PROCEDURE
E5 REPORT
APPENDIX F
F1 SCOPE
F2 PRINCIPLE
F3 APPARATUS
F4 PROCEDURE
F5 REPORT
APPENDIX G
G1 SCOPE
G2 PRINCIPLE
G3 APPARATUS
G4 PROCEDURE
G5 REPORT
APPENDIX H
H1 SCOPE
H2 PRINCIPLE
H3 APPARATUS
H4 PROCEDURE
H5 REPORT
APPENDIX I
I1 SCOPE
I2 PRINCIPLE
I3 APPARATUS
I4 PROCEDURE
I5 REPORT
APPENDIX J
J1 SCOPE
J2 PRINCIPLE
J3 APPARATUS
J4 PROCEDURE
J5 REPORT
APPENDIX K
K1 SCOPE
K2 PRINCIPLE
K3 APPARATUS
K4 PROCEDURE
K5 REPORT
APPENDIX L
L1 SCOPE
L2 PRINCIPLE
L3 APPARATUS
L4 PROCEDURE
L5 REPORT
APPENDIX M
M1 SCOPE
M2 PRINCIPLE
M3 APPARATUS
M4 PROCEDURE
M5 REPORT
APPENDIX N
N1 SCOPE
N2 PRINCIPLE
N3 APPARATUS
N4 PROCEDURE
N5 REPORT
APPENDIX O
O1 SCOPE
O2 PRINCIPLE
O3 APPARATUS
O4 PROCEDURE
O5 REPORT
APPENDIX P
P1 SCOPE
P2 CHAIR CONTROL TYPES AND ACCEPTABLE HAND FORCES TO OPERATE THEM
P2.1 General
P2.2 Side levers
P2.3 Finger levers and buttons
P2.4 Side pulls
P2.5 Hand knobs and hand levers
P3 RECOMMENDED DIMENSIONS FOR CHAIR CONTROLS
P3.1 General
P3.2 Side levers
P3.3 Finger levers and buttons
P3.4 Side pulls
P3.5 Hand knobs and hand levers
P4 RECOMMENDED DESIGN FEATURES OF CONTROL CONTACT POINTS
P4.1 General
P4.2 Side levers
P4.3 Finger levers and buttons
P4.4 Side pulls
P4.5 Hand knobs and hand levers
P5 ENHANCING THE USEABILITY OF CHAIR CONTROLS
P6 RECOMMENDED CRITERIA FOR THE SELECTION OF CONTROLS
Cited references in this standard
[Withdrawn]
Flexible cellular polyurethane for seat cushioning and bedding
DIN 4550
Office furniture; self-supporting energized devices for the height adjustment of swivel chairs and armchairs; safety requirements and testing
[Withdrawn]
Methods for testing flexible cellular polyurethane, Method 3: Determination of apparent density
[Pending Revision]
Textiles — Care labelling
[Current]
Specification for burning behaviour of upholstered furniture, Part 1: Upholstery materials for domestic furniture — Smouldering ignitability
Content history
DR 94028
AS/NZS 4438:1997 Rec:2016
$193.66
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