ISO 19682:2023
(Main)Furniture — Tables — Test methods for the determination of stability, strength and durability
Furniture — Tables — Test methods for the determination of stability, strength and durability
This document specifies test methods for the determination of stability, strength and durability of the structure of all types of tables and desks without regard to use, materials, design/construction or manufacturing process. This document does not apply to baby changing units. This document does not cover test methods for the assessment of ageing, degradation, flammability or electrical components.
Ameublement — Tables — Méthodes d'essai pour la détermination de la stabilité, de la résistance et de la durabilité
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 19682
First edition
2023-07
Furniture — Tables — Test methods
for the determination of stability,
strength and durability
Ameublement — Tables — Méthodes d'essai pour la détermination de
la stabilité, de la résistance et de la durabilité
Reference number
© ISO 2023
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ii
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General test conditions .2
4.1 Preliminary preparations . 2
4.2 Application of forces . 3
4.3 Tolerances . 3
5 Test equipment and apparatus .3
6 Test procedures – strength and durability . 6
6.1 General . 6
6.2 Horizontal static load test . 6
6.3 Vertical static load tests . 11
6.3.1 Vertical static load on main surface . 11
6.3.2 Additional vertical static load test where the main surface has a length >
1 600 mm .12
6.3.3 Vertical static load on end extension . 13
6.4 Horizontal durability and stiffness test . 14
6.4.1 General . 14
6.4.2 Horizontal durability test . 15
6.4.3 Stiffness of the structure . 19
6.5 Vertical durability test. 20
6.6 Vertical impact test. 20
6.6.1 General .20
6.6.2 Vertical impact test for all other table tops . 21
6.7 Deflection of table tops . 21
6.8 Durability of tables with castors . 22
6.9 Drop test . 22
6.10 Table top-to-leg assembly strength. 23
7 Test procedures – stability .28
7.1 General .28
7.2 Stability under vertical load .28
7.2.1 General .28
7.2.2 Test for tables that are or can be set to a height of 950 mm or less .28
7.2.3 Test for tables that are or can be set to a height greater than 950 mm .29
7.3 Stability for tables with extension elements (drawers) .29
7.4 Stability of tables designed to support a parasol .29
7.5 Horizontal stability test for tables with castors .30
7.6 Force stability test for tall products . 31
8 Test procedures – height adjustment mechanism .33
8.1 General . 33
8.2 Durability of height adjustment mechanism . 33
9 Tilting top table — cycle test .35
9.1 Test setup . 35
9.2 Test procedure . 36
10 Tilting top table – latch strength test .36
10.1 Test setup .36
10.2 Test procedure . 36
11 Test report format .37
iii
Annex A (informative) Guidance for the choice of loads, cycles, etc. for table and desk
furniture strength, durability, and stability tests .39
Annex B (informative) Purpose and applicability . 44
iv
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO document should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use
of (a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed
patent rights in respect thereof. As of the date of publication of this document, ISO had not received
notice of (a) patent(s) which may be required to implement this document. However, implementers are
cautioned that this may not represent the latest information, which may be obtained from the patent
database available at www.iso.org/patents. ISO shall not be held responsible for identifying any or all
such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 136, Furniture.
This document cancels and replaces ISO 21016:2007, which has been technically revised.
The main changes are as follows:
— the scope has been broadened to cover not only office furniture.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
v
Introduction
This document is a proposal for test methods for stability, strength and durability for table and desk
furniture. Safety aspects (e.g. resistance to heat and electric shock) of electrically motorized furniture
are additionally covered by IEC 60335-2-116.
Other methods for determination of the strength and durability of storage components, seating
surfaces, and other features which can be incorporated into tables are covered by other standards.
This document specifies test methods only. It does not specify acceptance criteria. These should be
specified in a document for general requirements. If this is not available, suggested loads and cycles can
be found in Annex A. It is up to the specifier to determine which tests are appropriate.
Tests carried out according to these test methods are intended to demonstrate the ability of the item
to give satisfactory service in its intended environment. The tests have been developed for units/
components that have not been in use. However, when properly justified, they can be used for fault
investigation.
vi
INTERNATIONAL STANDARD ISO 19682:2023(E)
Furniture — Tables — Test methods for the determination
of stability, strength and durability
1 Scope
This document specifies test methods for the determination of stability, strength and durability of
the structure of all types of tables and desks without regard to use, materials, design/construction or
manufacturing process.
This document does not apply to baby changing units.
This document does not cover test methods for the assessment of ageing, degradation, flammability or
electrical components.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 48-4, Rubber, vulcanized or thermoplastic — Determination of hardness — Part 4: Indentation
hardness by durometer method (Shore hardness)
ISO 2439, Flexible cellular polymeric materials — Determination of hardness (indentation technique)
ISO 7170:2021, Furniture — Storage units — Test methods for the determination of strength, durability
and stability
ISO 12543-4, Glass in building — Laminated glass and laminated safety glass — Part 4: Test methods for
durability
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
duty cycle
length of time the height adjustable table’s drive system may be operated without impairing its useful
life
3.2
end extension
added surface beyond the original surface that is not directly supported by the floor and adds 200 mm
or more to an end
3.3
levelling device
device whose primary function is to keep the table top horizontal
EXAMPLE Adjustable feet, glide, or similar with a limitation of 40 mm of vertical range.
3.4
main surface
surface that is not a shelf
3.5
safety glass
glass with additional features that make it less likely to break, or less likely to pose a threat when
broken
3.6
secondary surface
surface that is vertically separated from, and smaller than, the main surface (3.4) and used for storage
or occupied exclusively by the equipment placed on the surface
EXAMPLE Shelf.
3.7
structure
load bearing parts of furniture
EXAMPLE Frame, top and legs.
3.8
type 1 table
table having a main surface (3.4) 600 mm or more above the floor surface and a surface area greater
than 0,50 m
3.9
type 2 table
table that is not a type 1 table (3.8)
4 General test conditions
4.1 Preliminary preparations
The furniture shall be tested as delivered. Knock-down furniture shall be assembled according to the
instructions supplied with it. If the instructions allow the furniture to be assembled or combined in
different ways, the most adverse combination shall be used for each test. Knock-down fittings shall
be tightened before testing. Further tightening shall not take place unless specifically required by the
manufacturer.
During testing, the unit shall be placed on the floor and levelled, unless otherwise specified. Levelling
devices shall be set to the mid position but not more than 13 mm from fully closed.
Products with adjustable features shall be set at their most adverse position for testing unless otherwise
specified.
Unless otherwise specified by the manufacturer, the sample for test shall be stored in indoor ambient
conditions for at least 24 h immediately prior to testing. The tests shall be carried out at indoor ambient
conditions, but if during a test the temperature is outside the range of 15 °C to 27 °C, the maximum and/
or minimum temperature shall be recorded in the test report. The test for deflection of table tops (see
6.7), except those made from metal, glass and stone, shall be carried out at a relative humidity of 45 %
to 55 %. If during a test the relative humidity is outside of the range of 45 % to 55 %, the maximum
and/or minimum humidity shall be recorded in the test report.
If a test cannot be carried out as specified (e.g. because a loading pad cannot be used for the application
of a force due to the design of a product), the test shall be carried out as closely as possible to that
specified. Any modification to the test method shall be technically justified and shall be recorded in the
test report.
Before beginning the testing, visually inspect the unit thoroughly. Record any defects so that they are
not assumed to have been caused by the tests. Carry out measurements, if specified.
It is not necessary that all tests be carried out on the same unit, but all tests specified for a particular
component shall be carried out on the same component.
4.2 Application of forces
The test forces in durability and static load tests shall be applied sufficiently slowly to ensure that a
negligible dynamic load is applied. Unless otherwise specified, each static load shall be maintained for
not less than 10 s and not more than 15 s. The forces in durability tests shall be applied sufficiently
slowly to ensure that kinetic heating does not occur. Unless otherwise stated, durability loads shall be
maintained for (2 ± 1) s.
Forces shall be applied in a manner which ensures normal functioning of self-closing and damping
mechanisms.
The forces may be replaced by masses. The relationship 10 N = 1 kg shall be used.
4.3 Tolerances
Unless otherwise stated, the following tolerances are applicable to the test equipment:
— forces: ±5 % of the nominal force;
— masses: ±1 % of the nominal mass;
— dimensions: ±1 mm of the nominal dimension; except loading pads ±5 mm of the nominal dimension;
for dimensions greater than 200 mm, the tolerance shall be ±0,5 % of the dimension;
— angles: ±2° of the nominal angle;
— the accuracy for the positioning of loading pads and impact plates shall be ±5 mm.
Test masses, forces, dimensions, angles, times, rates and velocities used to perform the tests shall be
targeted at the nominal values specified.
NOTE For the purposes of uncertainty measurement, test results are not considered to be adversely affected
when the above tolerances are met.
5 Test equipment and apparatus
5.1 Unless otherwise stated, the tests may be applied by any suitable device because the results are
not dependent upon the apparatus, except in the case of impact tests where the apparatus described in
5.1 shall be used.
The equipment shall not inhibit deformation nor cause unnatural deformation of the unit/component,
i.e. it shall be able to move so that it can follow the deformation of the unit/component during testing.
With the exception of the horizontal static, durability and stiffness tests, described in 6.2 and 6.4, all
loading pads shall be capable of pivoting in relation to the direction of the applied force and the pivot
point shall be as close as practically possible to the load surface.
Loading pads for the horizontal static, durability and stiffness tests described in 6.2 and 6.4, shall not
pivot.
With the exception of the horizontal static, durability and stiffness tests described in 6.2 and 6.4, if a
loading pad tends to slide, use a slip resistant material between the loading pad and the surface being
tested.
5.2 Vertical impactor, as shown in Figure 1 and comprised of the components specified in 5.2.1 to
5.2.3.
5.2.1 Circular body, 200 mm in diameter separated from the striking surface by helical compression
springs and free to move relative to it on a line perpendicular to the plane of the central area of the
striking surface.
The body and associated parts minus the springs shall have a mass of (17 ± 0,1) kg and the whole
apparatus, including mass, springs and striking surface, shall have a mass of (25 ± 0,1) kg.
5.2.2 Springs, which shall be such that the nominal spring rate of the combined spring system is
(7 ± 2) N/mm and the total friction resistance of the moving parts is less than 1 N.
The spring system shall be compressed to an initial load of (1 040 ± 5) N (measured statically) and
the amount of spring compression movement available from the initial compression point to the point
where the springs become fully closed shall be not less than 60 mm.
5.2.3 Striking surface, which shall be a rigid circular object, 200 mm in diameter, the face of which
has a convex spherical curvature of (300 ± 5) mm radius with a 12 mm front edge radius.
Key
1 joint of lifting device not inhibiting free fall
Figure 1 — Vertical impactor
5.3 Floor, horizontal, flat and rigid with a smooth surface.
For the drop test (6.9) the floor shall be faced with a 2 mm thick layer of rubber with a hardness of
(85 ± 15) IRHD according to ISO 48-4 or a steel plate with a minimum thickness of 5 mm, placed directly
on the floor.
5.4 Stops, to prevent the article from sliding but not tilting, no higher than 12 mm except in cases
where the design of the item necessitates the use of higher stops.
5.5 Loading pad, a rigid cylindrical object, 100 mm in diameter, with a flat, smooth face and a 12 mm
edge radius.
5.6 Foam, 25 mm thick layer of flexible foam with a bulk density of (120 ± 25) kg/m .
5.7 Steel test tube, (18 ± 1,5) mm in diameter and (1,5 ± 0,5) mm in wall thickness with a length
such that a force can be applied at a distance of 2 200 mm above the floor.
5.8 Test surface for castor durability test, horizontal, flat smooth and rigid steel surface.
5.9 Obstacles for castor durability test, steel strips 50 mm wide and 3,2 mm high with the top
edges having a radius of 3,2 mm, 500 mm apart and parallel on the floor surface and perpendicular to
the test direction.
5.10 Test foam for glass, which shall be a foam sheet with a thickness of 100 mm, a bulk density of
(35 ± 5) kg/m and an indentation hardness index of (170 ± 40) N HA (40 %/30 s) in accordance with
ISO 2439.
6 Test procedures – strength and durability
6.1 General
Unless otherwise specified, the tests shall be carried out in the configuration most likely to cause
failure.
NOTE There can be multiple configurations likely to cause failure. Multiple test configurations can be
required.
Where the table top can be extended or enlarged, then the extended configuration shall be considered
most likely to cause failure and tested as extended unless specified otherwise. In this case, the extended
configuration is considered to be the main surface except for end extensions. If a test cannot be carried
out as specified, the test shall be carried out as closely as possible to that specified. Any modification to
the test method shall be technically justified and shall be recorded in the test report.
If a table has storage components (secondary surfaces), then all the applicable tests in this document
shall be conducted, unless specified otherwise, by using the loads in accordance with ISO 7170:2021,
Table 1.
6.2 Horizontal static load test
Position the table on the test surface, in its normal position of use without extending end extensions.
Height adjustable tables shall be set to their highest position, but not to exceed 950 mm. Restrain the
base of the table by stops placed in all directions at the opposite end to that at which the horizontal test
force is first to be applied.
Apply a 50 kg mass to an area of (300 ± 50) mm × (300 ± 50) mm, or a diameter of (300 ± 50) mm, to the
approximate centre of the table top. See Figure 2 for recommended examples of load placement.
For type 2 tables, apply the 50 kg mass or the manufacturer's recommended maximum but no less than
25 kg.
For vertical flat edge tops (no profile-edge), apply the specified horizontal force by means of a loading
pad (5.5) centred within 10 mm of the table top level (see Figure 3) in a direction perpendicular to a
line joining the two legs/supports, midway between the legs/supports of the side of the applied force.
See Figures 2 a), c), e), g) and i). For tops without a vertical edge (profile-edge), apply the load with the
loading pad centred at the outermost edge even if more than 10 mm from the top (see Figure 3).
If the table top is not secured to the understructure and the top moves when the specified force is
applied, reduce the force sufficiently to just prevent movement. Record the force applied. The applied
force shall not be reduced below the specified minimum force.
If the unrestrained portion of the base lifts when the specified force is applied, reduce the force
sufficiently to just prevent lifting. Record the force applied. The applied force shall not be reduced
below the specified minimum force. If unrestrained portion of the base lifts at this force, the specified
mass applied to the table top shall be increased gradually until this tendency ceases.
Leaving the stops in position, use the same procedure to determine the force to be applied in the
opposite direction.
One application of the force in each direction represents one cycle. Repeat the load application for a
total of 10 cycles.
Repeat the test method applying the specified horizontal force at the work top level along the line
joining the two legs/supports. See Figures 2 b), d), f), h) and j).
Apply the same force in the opposite direction.
One application of the force in each direction represents one cycle. Repeat the load application for a
total of 10 cycles.
Repeat this procedure until each unique leg design/construction has been tested.
a) Rectangular table – first and second directions
b) Rectangular table – third and fourth directions
c) Irregular shape table - first and second directions
d) Irregular shape table - third and fourth directions
e) Cantilever table – first and second directions
f) Cantilever table – third and fourth directions
g) Oval/round table – first and second directions
h) Oval/round table – third and fourth directions
i) Oval/round table with central column – first and second directions
j) Oval/round table with central column – third and fourth directions
Key
F force in first direction 1 table
F force in second direction 2 specified mass
F force in third direction 3 stop
F force in fourth direction
Figure 2 — Examples of positions of forces and stops in horizontal static load test
a) Vertical edge b) Profile edge
Key
F horizontal force
T table top
V vertical edge
Figure 3 — Vertical edge vs. profile edge
6.3 Vertical static load tests
6.3.1 Vertical static load on main surface
Height adjustable tables shall be set to their highest position but not to exceed 950 mm.
Apply the specified vertical downward force using the loading pad (5.5) anywhere on the top that is
most likely to cause a failure, but not less than 100 mm from any edge. If the table tends to overturn,
gradually move the loading point towards the centre of the table until this tendency ceases. See Figure 4.
If there are several such positions, carry out the test at a maximum of three different positions.
Repeat the procedure for each point a total of 10 times.
a) Main surface
b) Cantilever support
Key
F vertical static load
Figure 4 — Vertical static load test - main surface
6.3.2 Additional vertical static load test where the main surface has a length > 1 600 mm
Measure the table’s greatest length. If it is greater than 1 600 mm conduct this test.
Height adjustable tables shall be set to their highest position but not to exceed 950 mm.
Apply two vertical downward forces simultaneously using the loading pad (5.5) at points positioned on
the longitudinal axis of the table top, 400 mm on either side of the transversal axis. See Figure 5.
The longitudinal axis of a non-symmetrical table shall be a line drawn between the two points furthest
apart.
Apply and remove the load a total of 10 times.
Dimensions in millimetres
Key
L length of top
F vertical static load
Figure 5 — Additional vertical static load test
6.3.3 Vertical static load on end extension
A table extension inserted within the main frame of the table shall be considered as the main surface. A
part of the main surface in the unextended configuration may become an end extension in the extended
configuration.
Height adjustable tables shall be set to their highest position but not to exceed 950 mm.
Apply a vertical downward force using the loading pad (5.5) anywhere on the end extension that is
likely to cause a failure, but not less than 100 mm from any edge (see Figure 6). If there are several such
positions repeat the test at a maximum of two different positions.
If the table tends to overturn, gradually move the loading point towards the main surface (the force
must remain on the end extension) until this tendency ceases.
The test shall be run for 10 cycles.
If deflection measurements are required from a specifier, maintain the load at the last cycle for 30 min
in order to measure the maximum deflection, Δ. The maximum deflection, Δ, is the difference in height
at the point of loading, between the initial unloaded state and the final state under load. There are no
recommended requirements for deflection for this test in Annex A.
Key
d 100 mm minimum 1 main surface Δ deflection
F vertical static load 2 end extension
Figure 6 — Vertical static load test – end extension
Key
x less than 300 mm
Figure 7 — Extended table top example
6.4 Horizontal durability and stiffness test
6.4.1 General
Position the table on the test surface, in its normal position of use. Tables with extensions inserted in
the centre shall be tested in the extended configuration. Where the table top can be extended, and the
smallest dimension of the unextended table top is less than 300 mm, then the extended configuration
shall be considered most likely to cause failure. In this case, the extended configuration is considered
to be the main surface (Figure 7). All other tables shall be tested without end extensions. This test does
not apply to tables with castors unless there are at least two castors with locking devices.
Height adjustable tables shall be set to their highest position but not greater than 950 mm.
Restrain the base of the table by placing stops around each leg/base (in all directions) (see Figure 8).
For type 1 units, place a 50 kg mass on the table top on an area of (300 ± 50) mm x (300 ± 50) mm, or a
diameter of (300 ± 50) mm, at the point most likely to prevent the table lifting off the floor. For type 2
units, the mass shall be 25 kg.
6.4.2 Horizontal durability test
Apply two alternating 300 N horizontal forces within 10 mm of the table top surface by means of two
loading pads (5.5), one at one end of the table 50 mm from one corner/edge, a, (and one at the opposite
end/edge, b, [see Figure 8 a)].
If the table top is not secured to the understructure and the top moves when the specified force is
applied, reduce the force sufficiently to prevent movement. Perform the test using this reduced force in
that direction only. Record the value of any reduced force used.
If the table tends to lift in one direction of loading at a load less than that specified, reduce the horizontal
force sufficiently to prevent lifting. Perform the test using this reduced force in that direction only.
Record the value of any reduced force used.
Repeat the procedure at the other corner positions, c and d [see Figure 8 a)].
Carry out the test for the number of cycles specified.
The test may be carried out in a one stage cycle a, c, b, d or in a two-stage cycle a, b followed by c, d.
For table tops with a cantilever support at one end, carry out the test as shown in Figure 8 b).
For table tops attached to another table top at one end, carry out an additional test as shown in Figure 8
c).
If measurements of the horizontal movement are required, this shall be measured at the beginning and
end of the test, when the load is changed from one end to the opposite end.
For tables with circular or oval tops, direction a, b shall be through the longitudinal axis. Direction c, d
shall be on a line perpendicular to the direction a, b and 50 mm from outermost edge of the table [see
Figure 8 d)].
For tables with curved table tops special loading pads may be used.
For tables with a triangular base or three legs, direction a, b shall be perpendicular to one side of the
base or to the line joining two legs and passing throughout the third corner of the base or the third leg.
Direction c, d shall be parallel to one side of the base or the line joining two legs. For tables with circular
or oval tops, and featuring a triangular base or three legs, a, b shall be through the longitudinal axis.
Direction c, d shall be on a line perpendicular to the direction a, b and 50 mm from outermost edge of
the table [see Figure 8 e)].
For tables with circular or oval tops, and featuring a cross leg support, direction a, b shall be through
the longitudinal axis. Direction c, d shall be on a line perpendicular to the direction a, b and 50 mm
from outermost edge of the table [see Figure 8 f)].
For vertical flat edge tops (no profile-edge), apply the specified horizontal force by means of a loading
pad (5.5) centred within 10 mm of the table top level (see Figure 3) in a direction perpendicular to a
line joining the two legs/supports, midway between the legs/supports of the side of the applied force.
See Figures 2 a), c), e), g) and i). For tops without a vertical edge (profile-edge), apply the load with the
loading pad centred at the outermost edge even if more than 10 mm from the top (see Figure 3).
Dimensions in millimetres
a) Main surface
b) Cantilevered tables
c) Additional tops
d) Round and elliptical tops
e) Round and elliptical tops with three legs
f) Round and elliptical tops with crossing legs
Key
F force applied at point a 1 main table top
a
F force applied at point b 2 specified mass
b
F force applied at point c 3 stops
c
F force applied at point d 4 additional top
d
Figure 8 — Horizontal durability test
6.4.3 Stiffness of the structure
This test is applicable to tables 950 mm or less in height. Height adjustable tables shall be set to their
highest position but not to exceed 950 mm.
A table extension added in the centre of the table shall be considered as the main surface.
For type 1 units, place 50 kg on the table top on an area of (300 ± 50) mm × (300 ± 50) mm, or a diameter
of (300 ± 50) mm, at the point most likely to prevent the table lifting off the floor. For type 2 units, the
mass shall be 25 kg.
Apply a force of 200 N by means of the loading pad (5.5). For vertical flat edge tops, apply the horizontal
force by means of the loading pad centred within 10 mm of the table top surface in a direction
perpendicular to a line joining the two legs/supports, midway between the legs/supports. For tops
without a vertical edge (profile-edge), apply the load with the loading pad centred at the outermost
edge. (see Figure 3).
Maintain the force for (10 ± 1) s and record the position of a point D on the length of the table. Remove
the force and repeat it in the opposite direction and record the distance of the horizontal travel of the
point. The total distance point D moves, from its location when the force in one direction is applied to
its location when the force is applied in the other direction, is D [see Figure 9 a)]. Calculate and record
D
1.
Repeat the procedure using horizontal forces along the transverse centreline. The total distance point
D moves, from its location when the force in one direction is applied to its location when the force is
applied in the other direction, is D [see Figure 9 b)]. Calculate and record D .
2 2
If the table top is not secured to the understructure and the top moves when the 200 N force is applied,
reduce the force sufficiently to prevent movement. Perform the test using this reduced force in that
direction only. Record the value of any reduced force used. The applied force shall not be reduced below
100 N.
a) Longitudinal direction
b) Transverse direction
Key
F force applied at point a 1 main table top
a
F force applied at point b 2 specified mass
b
F force applied at point c 3 stops
c
F force applied at point d
d
D measurement point
D distance travelled by point D
D distance travelled by point D
Figure 9 — Stiffness of the structure
6.5 Vertical durability test
Position the table on the test surface in its normal position of use. Tables with extensions inserted in the
centre shall be tested in the extended configuration. All other tables shall be tested without extending
end extensions.
Where the table top can be extended, and the smallest dimension of the unextended table top is less
than 300 mm, then the extended configuration shall be considered most likely to cause failure. In this
case, the extended configuration is considered to be the main surface (Figure 7). Height adjustable
tables shall be set to their highest position but not to exceed 950 mm.
Apply the vertical force 300 N by means of the loading pad (5.5), on the table top at the most adverse
position, 100 mm from the table top edge.
If the article tends to tip, load the centre of the main table top with a mass sufficient to prevent
overturning.
Carry out the test for the specified cycles.
6.6 Vertical impact test
6.6.1 General
Position the unit on the test surface and level in its normal position of use. Tables with extensions
inserted in the centre shall be tested in the extended configuration. All other tables shall be tested
without extending end extensions. Height adjustable tables shall be set to their highest position but not
to exceed 950 mm.
Where the table top can be extended, and the smallest dimension of the unextended table top is less
than 300 mm, then the extended configuration shall be considered most likely to cause failure. In this
case, the extended configuration is considered to be the main surface (Figure 7). Vertical impact test
for glass table tops
Place the unit on the floor surface.
The impact point on glass surface shall be in the horizontal plane. If necessary, the unit shall be tilted.
Place a piece of foam (5.10) on the glass surface to be impacted in the worst-case location.
With the impactor (5.2) resting on the foam, adjust the fall height to 50 mm above the resting position.
Let the impactor fall freely onto the foam.
Before each impact, check that there are no glass splinters in the polyurethane foam or in the striking
surface of the impactor.
Repeat impact testing a total of 10 times.
6.6.2 Vertical impact test for all other table tops
Place one layer of foam (5.6) on the table top.
The height of drop shall be measured from the position where the impactor is resting on the surface of
that layer of foam. Place a second layer of foam (5.6) between the striking surface and the table top.
Allow the vertical impactor (5.2) to fall freely from a height of 100 mm above the resting position
identified above, onto the foam surface at the following three locations:
— as close as possible to one point of support of the top but not less than 100 mm from any edge;
— 100 mm from the edge of the top as far away from the supports (structure) as possible;
— 100 mm from the edges at one corner.
Allow the impactor to fall freely through the specified drop height onto the foam on the foam-covered
table top for 10 cycles at each position.
6.7 Deflection of table tops
Position the table on the test surface, in its normal position of use. Tables with extensions inserted
in the centre shall be tested in the extended configuration. All other tables shall be tested without
extending end extensions.
Testing of
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