ASTM F851-87(2020)

Standard Test Method for Self-Rising Seat Mechanisms

SIGNIFICANCE AND USE
3.1 This test method provides the criteria for a practical, reproducible test for assuring the proper life-cycle of self-rising or automatic-lifting seat mechanisms of chairs.  
3.2 This test method should be considered suitable for the testing required for design purposes, manufacturing control, service evaluation, specification acceptance, and regulatory statutes.
SCOPE
1.1 This test method evaluates the performance of self-rising or automatic-lifting seat mechanisms of chairs in places of assembly.  
1.2 This test method addresses only the raising of the seat. It does not address the load that may be placed on that seat. Committee F15 is considering a standard addressing this load.  
1.3 The values as stated in inch-pound units are to be regarded as the standard. The values in parentheses are provided for information only.  
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 30-Apr-2020
• ICS: 43.040.60 - Bodies and body components
• Technical Committee: F15 - Consumer Products
• Drafting Committee: F15.23 - Auditorium Seating

Relations

• Replaces: ASTM F851-87(2013) - Standard Test Method for Self-Rising Seat Mechanisms
• Effective Date: 01-May-2020

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: F851 − 87 (Reapproved 2020)
Standard Test Method for
Self-Rising Seat Mechanisms
ThisstandardisissuedunderthefixeddesignationF851;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Significance and Use
1.1 This test method evaluates the performance of self- 3.1 This test method provides the criteria for a practical,
rising or automatic-lifting seat mechanisms of chairs in places reproducibletestforassuringtheproperlife-cycleofself-rising
of assembly. or automatic-lifting seat mechanisms of chairs.
1.2 This test method addresses only the raising of the seat. 3.2 This test method should be considered suitable for the
It does not address the load that may be placed on that seat. testing required for design purposes, manufacturing control,
Committee F15 is considering a standard addressing this load. service evaluation, specification acceptance, and regulatory
statutes.
1.3 The values as stated in inch-pound units are to be
regarded as the standard. The values in parentheses are
4. Apparatus
provided for information only.
4.1 A representative apparatus capable of performing this
1.4 This standard does not purport to address all of the
test is shown in Figs. 1 and 2. This unit consists of a
safety concerns, if any, associated with its use. It is the
motor-powered rotating arm with adjustable length and two
responsibility of the user of this standard to establish appro-
3 ⁄2-in. (88.9 mm) roller wheels fastened to the end of the arm.
priate safety, health, and environmental practices and deter-
4.2 Other suitable apparatus may be used.
mine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accor-
5. Sampling
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
5.1 Test Specimen—Each test specimen shall consist of a
Development of International Standards, Guides and Recom-
self-rising seat mechanism contained in a single chair.
mendations issued by the World Trade Organization Technical
5.2 Sample Size—The sample size shall consist of three test
Barriers to Trade (TBT) Committee.
specimens selected at random from a standard production run
(see Appendix X1.1). All components of the test specimens
2. Summary of Test Method
must be manufactured using that manufacturer’s standard
2.1 The principle of the test method is to test the reliability
materials, methods, and design.
of the seat-lifting mechanism.
2.2 This test method consists of using hard rubber rollers 6. Specimen Preparation
attached dually to the end of an actuating bar to lower the seat.
6.1 Assemble and mount the test specimen to simulate
Theseatisthenreleasedandallowedtoliftautomaticallytothe
installation conditions, following manufacturer’s assembly in-
“at-rest” or “raised” position. The test method requires the seat
structions. Record dimensional position of seat in “raised”
to be cycled at a specified rate, and allows for the number of
position relative to the back of the chair (see Fig. 3).
cycles completed, without failure, to be measured.
7. Procedure
2.3 The “at-rest” position for an auditorium chair is the
“raised” position. The seat is lowered to allow the occupant to
7.1 Design the apparatus to lower the seat to its complete
be seated. When released, the seat is automatically returned to
“down” position.
the “raised” position by use of a spring return mechanism or
7.2 The apparatus then releases the seat. This allows the
counter-weight for gravity lift (see Figs. 1 and 2).
seat-lifting mechanism to function, returning the seat to the
“at-rest” or “raised” position, completing one cycle.
This test method is under the jurisdiction of ASTM Committee F15 on
7.3 Continue for 100 000 cycles to be completed within a
Consumer Products and is the direct responsibility of Subcommittee F15.23 on
Auditorium Seating. period not to exceed 14 calendar days (see Appendix X1.2).
Current edition approved May 1, 2020. Published May 2020. Originally
7.4 The seat-lifting mechanism passes the test if the three
approved in 1983. Last previous edition approved in 2013 as F851 – 87 (2013).
DOI: 10.1520/F0851-87R20. specimens meet the following conditions:
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F851 − 87 (2020)
FIG. 1 Self-Rising Seat Mechanis
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