ISO 7173:2023
Furniture — Chairs and stools — Determination of strength and durability
This document specifies test methods for the determination of strength and durability of the structure of all types of seating without specific regard to end use, materials, design/construction or manufacturing process.
This document does not apply to children’s highchairs, table mounted chairs and bath seats.
Test methods for the assessment of ageing, degradation, ergonomics and electrical functions are not included.
The test methods are not intended to assess the durability of upholstery materials.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 General test conditions
4.1 Preliminary preparation
4.2 Application of forces
4.3 Tolerances
5 Test equipment and apparatus
5.1 General
5.2 Seat loading point template
5.3 Floor
5.4 Stops
5.5 Seat loading pad
5.6 Smaller seat loading pad
5.7 Back loading pad
5.8 Local loading pad
5.9 Foam for use with loading pads
5.10 Seat impactor
5.10.1 General
5.10.2 Circular body
5.10.3 Springs
5.10.4 Striking surface
5.11 Impact hammer
5.12 Armrest durability test apparatus
5.13 Test surface for castor testing
5.14 Front load locator device
5.15 Loading discs
6 Test procedures – Seating other than work chairs
6.1 General
6.2 Determination of seat and back loading points
6.2.1 General
6.2.2 Seating with a backrest
6.2.3 Seating without a backrest
6.3 Determination of angle of backrest inclination
6.4 Seat static load and backrest static load test
6.4.1 General
6.4.2 Seating with rocking runners
6.5 Seat front edge static load test
6.6 Vertical load test on backrests
6.7 Horizontal forward static load test on backrests
6.8 Footrest static load test
6.9 Apply a vertical force by means of the local loading pad (5.8) — Legrest static load test
6.10 Armrest sideways static load test
6.11 Arm rest downwards static load test
6.12 Headrest static load test
6.13 Vertical upwards static load test on armrests
6.13.1 Seating which can be moved when occupied
6.13.2 Stacking seating
6.14 Vertical static load test on auxiliary writing surfaces
6.15 Leg forward static load test
6.16 Leg sideways static load test
6.17 Combined seat and backrest durability test
6.17.1 General
6.17.2 Seating with rocking runners
6.18 Seat front edge durability test
6.19 Durability test on outdoor seating with a multi-position backrest
6.20 Armrest durability test
6.21 Footrest durability test
6.22 Auxiliary writing surfaces durability test
6.23 Tipping seat operation test
6.24 Seat impact test
6.25 Backrest impact test
6.26 Armrest impact test
6.27 Drop tests
6.27.1 Drop test for multiple seat units
6.27.2 Drop test for stacking seating
6.27.3 Drop test from the height of a table
6.28 Backward fall test
6.29 Castor and chair base durability test
6.29.1 Castor and chair base durability test for chairs with castors on all legs
6.29.2 Castor and chair base durability test for chairs with castor and glide combinations
6.30 Rolling resistance test of the unloaded chair
6.31 Seat side-to-side durability test in D-G points for single column seating
6.31.1 General
6.31.2 Loading points
7 Test procedures – Work chairs
7.1 General
7.2 Loading points
7.2.1 General
7.2.2 Loading point A
7.2.3 Loading point B
7.2.4 Loading point C
7.2.5 Loading point D
7.2.6 Loading point E
7.2.7 Loading point F
7.2.8 Loading point G
7.2.9 Loading point H
7.2.10 Loading point J
7.3 Combined seat and backrest static load test
7.4 Seat front edge static load test
7.5 Armrest downward static load test – central
7.6 Armrest downward static load test – front
7.7 Armrest sideways static load test
7.8 Footrest static load test
7.9 Seat and backrest durability test
7.10 Armrest durability test
7.11 Swivel test
7.12 Footrest durability test
7.13 Castor and chair base durability test
7.14 Rolling resistance test of the unloaded chair
8 Test procedures – Loungers
8.1 General
8.2 Seat and backrest static load test
8.3 Additional seat and legrest static load test
8.4 Seat and backrest durability test
8.4.1 Seat and backrest durability test procedure
8.4.2 Additional seat durability test procedure
8.5 Durability test on backrest mechanism
8.6 Armrest downwards static load test
8.7 Armrest durability test
8.8 Impact test
8.9 Lifting test for mobile loungers
9 Test report
Annex A (normative) Seat loading pad data
Annex B (informative) Armrest loading pad details
Annex C (normative) Front load locator device (5.14)
Annex D (informative) Purpose and applicability of test methods
Annex E (informative) Suggested loads and cycles
Annex F (informative) Example construction of front load locator device
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 General test conditions
4.1 Preliminary preparation
4.2 Application of forces
4.3 Tolerances
5 Test equipment and apparatus
5.1 General
5.2 Seat loading point template
5.3 Floor
5.4 Stops
5.5 Seat loading pad
5.6 Smaller seat loading pad
5.7 Back loading pad
5.8 Local loading pad
5.9 Foam for use with loading pads
5.10 Seat impactor
5.10.1 General
5.10.2 Circular body
5.10.3 Springs
5.10.4 Striking surface
5.11 Impact hammer
5.12 Armrest durability test apparatus
5.13 Test surface for castor testing
5.14 Front load locator device
5.15 Loading discs
6 Test procedures – Seating other than work chairs
6.1 General
6.2 Determination of seat and back loading points
6.2.1 General
6.2.2 Seating with a backrest
6.2.3 Seating without a backrest
6.3 Determination of angle of backrest inclination
6.4 Seat static load and backrest static load test
6.4.1 General
6.4.2 Seating with rocking runners
6.5 Seat front edge static load test
6.6 Vertical load test on backrests
6.7 Horizontal forward static load test on backrests
6.8 Footrest static load test
6.9 Apply a vertical force by means of the local loading pad (5.8) — Legrest static load test
6.10 Armrest sideways static load test
6.11 Arm rest downwards static load test
6.12 Headrest static load test
6.13 Vertical upwards static load test on armrests
6.13.1 Seating which can be moved when occupied
6.13.2 Stacking seating
6.14 Vertical static load test on auxiliary writing surfaces
6.15 Leg forward static load test
6.16 Leg sideways static load test
6.17 Combined seat and backrest durability test
6.17.1 General
6.17.2 Seating with rocking runners
6.18 Seat front edge durability test
6.19 Durability test on outdoor seating with a multi-position backrest
6.20 Armrest durability test
6.21 Footrest durability test
6.22 Auxiliary writing surfaces durability test
6.23 Tipping seat operation test
6.24 Seat impact test
6.25 Backrest impact test
6.26 Armrest impact test
6.27 Drop tests
6.27.1 Drop test for multiple seat units
6.27.2 Drop test for stacking seating
6.27.3 Drop test from the height of a table
6.28 Backward fall test
6.29 Castor and chair base durability test
6.29.1 Castor and chair base durability test for chairs with castors on all legs
6.29.2 Castor and chair base durability test for chairs with castor and glide combinations
6.30 Rolling resistance test of the unloaded chair
6.31 Seat side-to-side durability test in D-G points for single column seating
6.31.1 General
6.31.2 Loading points
7 Test procedures – Work chairs
7.1 General
7.2 Loading points
7.2.1 General
7.2.2 Loading point A
7.2.3 Loading point B
7.2.4 Loading point C
7.2.5 Loading point D
7.2.6 Loading point E
7.2.7 Loading point F
7.2.8 Loading point G
7.2.9 Loading point H
7.2.10 Loading point J
7.3 Combined seat and backrest static load test
7.4 Seat front edge static load test
7.5 Armrest downward static load test – central
7.6 Armrest downward static load test – front
7.7 Armrest sideways static load test
7.8 Footrest static load test
7.9 Seat and backrest durability test
7.10 Armrest durability test
7.11 Swivel test
7.12 Footrest durability test
7.13 Castor and chair base durability test
7.14 Rolling resistance test of the unloaded chair
8 Test procedures – Loungers
8.1 General
8.2 Seat and backrest static load test
8.3 Additional seat and legrest static load test
8.4 Seat and backrest durability test
8.4.1 Seat and backrest durability test procedure
8.4.2 Additional seat durability test procedure
8.5 Durability test on backrest mechanism
8.6 Armrest downwards static load test
8.7 Armrest durability test
8.8 Impact test
8.9 Lifting test for mobile loungers
9 Test report
Annex A (normative) Seat loading pad data
Annex B (informative) Armrest loading pad details
Annex C (normative) Front load locator device (5.14)
Annex D (informative) Purpose and applicability of test methods
Annex E (informative) Suggested loads and cycles
Annex F (informative) Example construction of front load locator device
Bibliography