This standard is intended to provide manufacturers, specifiers, and users with a common basis for evaluating the safety, durability, and structural adequacy of general-purpose office chairs. General-purpose office chairs are normally used in an office environment and may include, but are not limited to those seating styles typically referred to as: executive/management, task/secretarial, side/guest chairs, nesting folding chairs, tablet arm chairs and stools. This standard describes the means of evaluating general-purpose office chairs, independent of construction materials, manufacturing processes, mechanical designs or aesthetic designs. This standard does not address lounge seating, flammability, surface material durability, cushioning materials, product emissions, or ergonomic considerations. The standard defines specific tests, the laboratory equipment that may be used, the conditions of tests, and the minimum acceptance levels to be used in evaluating general-purpose office chairs. The acceptance levels and test parameters given in this standard are based on the actual field use and test experience of BIFMA members. Where appropriate, the National Health and Nutrition Examination Survey (NHANES) 2007-2010 study, which indicates the weight of the 95th percentile male is 125 kg (275 pounds), was used in the development of the tests. This does not mean that users with weights above the percentiles referenced cannot safely or comfortably use a chair developed to a given BIFMA standard. (See also Appendix E). The tests were developed with an estimated product life of ten years based on single-shift usage. Product life will be affected by user size/weight, product use, care and maintenance, environment, and other factors, and, as such, product compliance to this standard does not necessarily guarantee a ten-year product life. The tests in this standard are intended to assess the performance of new products only. They are not intended to assess a product that has been in use. ISO 17025 requirements for measurement uncertainty do not apply to this standard.

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PDF Pages	PDF Title
7	1 Scope
8	2 Definitions
11	3 General 3.1 Testing Considerations
12	3.2 Manufacturer’s Instructions 3.3 Figures
13	3.4 Figure Symbols 3.5 Measurements 3.6 Tolerances
14	3.7 Test Force Application 3.8 Pretest Inspection 3.9 Recommended Test Report Format
15	3.10 Temperature & Humidity Conditions
16	Figures 4 Types of Chairs
17	4 Types of Chairs
18	Tables 1 Test Guide by Chair Type
23	5 Backrest Strength Test – Static – Type I and II
27	6 Backrest Strength Test – Static – Type III
29	5 Backrest Strength Test – Static -Type I and II ……………………………… 17-20 6 Backrest Strength Test – Static – Type III ……………………………………. 23-24 7 Drop Test – Dynamic
30	7 Drop Test – Dynamic
32	8 Swivel Test – Cyclic
33	8 Swivel Test – Cyclic
34	9 Tilt Mechanism Test – Cyclic
35	9 Tilt Mechanism Test – Cyclic
39	10 Seating Durability Tests – Cyclic
41	10 Seating Durability Tests – Cyclic and Front Corner Load-Ease .. 34-36 &
45	11 Stability Tests
55	12 Arm Strength Test – Vertical – Static
57	11 Stability Tests ……………………………………………………………….. 41-42, 47-49 12 Arm Strength Test – Vertical – Static …………………………………………… 52-53 13 Arm Strength Test – Horizontal – Static
58	13 Arm Strength Test – Horizontal – Static
62	14 Backrest Durability Test – Cyclic – Type I
64	14 Backrest Durability Test – Cyclic – Type I ……………………………. 57-59, &
69	15 Backrest Durability Test – Cyclic – Type II and Type III
71	15 Backrest Durability Test – Cyclic – Type II and Type III ………….. 64-66 &
74	16 Caster/Chair Base Durability Test – Cyclic
75	16 Caster/Chair Base Durability Test – Cyclic ……………………………….. 71 &
80	17 Leg strength Test – Front and Side Application
83	18 Footrest Static Load Test – Vertical 17 Leg Strength Test – Front and Side Application …………………………… 76-78 18 Footrest Static Load Test – Vertical
85	19 Footrest Durability Test – Vertical – Cyclic 19 Footrest Durability Test – Vertical – Cyclic
87	20 Arm Durability Test – Cyclic
88	20 Arm Durability Test – Cyclic
89	21 Out Stop Test for Chairs with Manually Adjustable Seat Depth
90	21 Out Stop Tests for Chairs with Manually Adjustable Seat Depth
91	22 Tablet Arm Chair Static Load Test
92	22 Tablet Arm Chair Static Load Test
93	23 Tablet Arm Chair Load Ease Test – Cyclic
94	23 Tablet Arm Chair Load Ease Test – Cyclic
95	24 Structural Durability Test – Cyclic
96	24 Structural Durability
97	Appendix A: Impact Test Bag Construction Details
104	Appendix B: Stability Disk Construction Details Appendix A: Impact Test Bag Construction Details ………………………………. 95-101 Appendix B: Stability Disk Construction Details
105	Appendix C: Base Test – Informative
106	Appendix C: Base Test – Informative
107	Appendix D: Front Stability Load Locator Fixture Construction Details
115	Appendix E: BIFMA Position – Chair Weight Limits / Load Ratings
116	Appendix F: Summary of Significant Changes
118	Appendix G: Template for Rear Stability Appendix D: Front Stability Load Locator Fixture Construction Details ….. 105-112 Appendix G: Template for Rear Stability
119	Appendix H: Simultaneous Side Legs Strength Test
120	Appendix H: Simultaneous Side Legs Strength Test
121	Appendix J: Figure of Leg-Base Chair
122	Appendix J – Figure of Leg-Base Chair

Published By	Publication Date	Number of Pages
BIFMA	2017	122


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Standard Title	ANSI/BIFMA X5.1-2017 (R2022) Office Chairs
Published Code	BIFMA
Publication Date	2017
Pages Count	122

BIFMA X5.1 2017 RA2022

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