BIFMA X5.4

Dans le cadre des essais sur ameublement de bureau, Micom offre le service d’essai selon BIFMA X5.4. L’édition originale de la méthode ANSI/BIFMA X5.4 « Public and Lounge Seating » a été publiée en 1980 et a été rééditée à plusieurs reprises. L’édition actuellement en vigueur a été publiée en 2020. Cette norme s’applique aux sièges « lounge » qu’ils soient faits pour un ou plusieurs occupants, avec ou sans piédestal. BIFMA X5.4 est écrit pour mettre à l’essai les chaises dont l’occupant a une masse corporelle jusqu’à 275lbs, ce qui représente un homme du 95e percentile. Les essais ont été développés pour un produit dont la durée de vie est estimée à 10 ans, basé sur une utilisation continue durant un seul quart de travail. Les chaises de bureau régulière devraient être testées selon BIFMA X5.1. Nous offrons également les essais BIFMA X6.1, BIFMA X6.4, et BIFMA HCF 8.1 pour les chaises. Types d’essais à effectuer selon BIFMA X5.4 :

  • Chargement statique (Static load loading)
  • Chargement dynamique (Dynamic loading)
  • Essais de surabilité (Durability testing)

La plupart du temps, les manufacturiers offrent pour une même famille de produits des sièges pour un et aussi pour plusieurs occupants. Toutes les configurations n’ont pas à être testées pour tous les essais. De façon générale, certains essais dont ceux de stabilité vont être effectués sur la configuration pour un occupant, et les autres essais vont être sur la configuration à usagers multiples qui s’avère être le pire cas au niveau structurel. La façon dont est déterminé le pire cas est par l’analyse de certains facteurs dont la construction, le plus long espacement non-supporté, etc. Nos experts se feront un plaisir de revoir sans frais votre offre de produit pour déterminer quels éléments doivent être testés et mettre sur pied un programme d’essai approprié. 28 essais sont disponibles sous BIFMA X5.4 afin de couvrir les différentes options retrouvées dans les sièges de type « lounge ». Tous les essais n’ont pas à être effectués sur toutes les chaises. La norme divise les chaises en 4 catégories et sont nommées « styles ». Ces « styles sont décrit ici-bas et s’appliquent autant aux chaises simple usager qu’aux multi-usagers:

  • Style A: Avec bras et avec dossier (With arm(s) and with backrest)
  • Style B: Avec bras et sans dossier (With arm(s) and without backrest)
  • Style C: Sans bras et avec dossier (Without arms and with backrest)
  • Style D: Sans bras et sans dossier (Without arms and without backrest)

Le tableau qui suit montre quels essais doivent être réalisés sur chacun des « styles » de chaises, autant pour les usagers uniques que multiples et dans la mesure où l’option à l’essai est disponible sur la chaise et que l’essai est applicable :

Test #TestStyle usager uniqueStyle usager multiple
ABCDABCD
5Backrest Strength Test – Horizontal – StaticXXXX
6Backrest Strength Test – Vertical – StaticXXXX
7Backrest Durability Test – Horizontal – CyclicXXXX
8Backrest Durability Test – Vertical – CyclicXXXX
9Arm Strength Test – Horizontal – StaticXXXX
10Arm Strength Test – Vertical – StaticXXXX
11Arm Durability Test – Horizontal – CyclicXX
12Arm Durability Test – Vertical – CyclicXX
13Arm Durability Test – Angular – CyclicXX
14Seating Durability Test – CyclicXXXXXXXX
15Drop Test – DynamicXXXXXXXX
16Leg Strength Test – Front and Side ApplicationXXXXXXXX
17Unit Drop Test – DynamicXXXXXXXX
18Caster/Unit Base Durability Test – CyclicXXXXXXXX
19Swivel Test – CyclicXXXX
20Tilt Mechanism Test – CyclicXXXX
21Stability TestsXXXXXXXX
22Tablet Arm Load Ease Test – CyclicXXXXXXXX
23Tablet Arm Load Test – StaticXXXXXXXX
24Structural Durability Test – Side-to-side – CyclicXXXXXXXX
25Cycle Test for ReclinersXXXX
26Legrest Strength TestXXXX
27Footrest Static LoadXXXX
28Footrest Durability Test for Stools – VerticalXXXX

Au cas où votre produit aurait été testé sous l’édition 2012, le tableau qui suit offre une comparaison essai par essai entre la nouvelle et l’ancienne version de la norme afin de vous informer de quelle façon votre produit pourrait être impacté :  

Section
#
Section TitleComparisonConclusion
TitleTitle is now “Public and Lounge Seating” instead of “Lounge and Public Seating – Tests”No impact
1Scope-Scope now includes restaurant/dining/café settings, visitor seating in patient rooms, and folding chairs.
-95th percentile male weight increased to 275lb from 253 lbs
2
Definitions – backrestModified definition and included minimum height of 7.9 inch.No retesting required:
New definition narrows scope of applicable features
Definitions – folding chairAdded definitionNo impact
Definitions – general-purpose large occupant office chairsAdded definitionNo impact
Definitions – leg baseAdded definitionNo impact
Definitions – legrestAdded definitionNo impact
Definitions – reclinerAdded definitionNo impact
Definitions – stoolAdded definitionNo impact
Definitions – tilt mechanismAdded definitionNo impact
Definitions – seat or seating positionWhen calculating number of seating positions width of seating surface now divided by 28″ (instead of 22.5″) and rounded to the nearest integer (instead of rounded down)May require retesting:
Units that were previously considered single-seaters may now be multi-seaters and vice-versa
3.1.3General – Testing ConsiderationsAdded statement that if proof loads are held longer than 10 seconds and damage occurs, it is not considered a failureNo retesting required:
Clarification is more lenient
3.5General – MeasurementsAdded ISO 24496 CMD as an optionNo retesting required:
BIFMA CMD still valid
3.6General – TolerancesAdded requirement for calibration of devices used to measure test parametersMay require retesting:
If your lab’s calibration is not as stringent as new requirements
3.9General – Test EnvironmentAdded that sample should be stored in ambient conditions for at least 24 hours before testing. Conditions should be maintained between 15 to 27°C and 10-70% RH and if outside these limits they should be recordedNo retesting required:
New limitations are suggestions
3.11General – AppendicesAdded distinction between Normative and Informative AppendicesMay require retesting:
See below
5.1Backrest Strength Test – Horizontal – Static – ApplicabilityAdded statement that test does not apply to recliners with user force activated back recline mechanisms unless backrest can be locked into position or stops at less than 35 degrees from the vertical.
No retesting required:
New changes are less critical
5.3.4Backrest Strength Test – Horizontal – Static – Test SetupLimited multi-seat test for units with >2 seats to two adjacent positions.
5.4.2Backrest Strength Test – Horizontal – Static – Proof LoadProof load now held for 10 seconds instead of 1 minute
6.3Backrest Strength Test – Vertical – Static – Test SetupLimited multi-seat test for units with >2 seats to two adjacent positions.No resting required:
Units where 3 or more seating positions were previously tested concurrently are worst case
6.4.2Backrest Strength Test – Vertical – Static – Proof LoadProof load now held for 10 seconds instead of 1 minuteNo resting required:
1 min proof load more critical than 10 seconds
7.3.4Backrest Durability Test – Horizontal – Cyclic – Test SetupLimited multi-seat test for units with >2 seats to two adjacent positions.
Retest required:
Increased load on seat makes the test more severe
7.3.6Backrest Durability Test – Horizontal – Cyclic – Test SetupLoad on seat increased to 240 lbs from 225 lbs.
8.3Backrest Durability Test – Vertical – CyclicLimited multi-seat test for units with >2 seats to two adjacent positions.No resting required:
Units where 3 or more seating positions were previously tested concurrently are worst case
9.4.2Arm Strength Test – Horizontal – Static – Proof LoadProof load now held for 10 seconds instead of 1 minuteNo resting required:
1 min proof load more critical than 10 seconds
10.4.2Arm Strength Test – Vertical – Static – Proof LoadProof load now held for 10 seconds instead of 1 minute
May require retesting:
Units with height-adjustable arms need to be re-evaluated
10.5.2Arm Strength Test – Vertical – Static – Acceptance LevelSudden drop of 1 inch on height-adjustable arms is no longer acceptable during proof loading.
14.3Seating Durability Tests – Cyclic – Test Setup-Drop height increased to 1.4 from 1.2.
-Weight applied on all other seats increased to 240 lbs from 225 lbs.
Retest required:
Increased drop height and load on seat make the test more severe
14.4Seating Durability Tests – Cyclic – Test ProcedureLimited number of identical seating positions to be evaluated (minimum two).
15.3Drop Test – Dynamic – Test Setup-Added requirement that any center columns not to touch the test platform during functional load.
-Added note that casters shall be placed in worst-case position.
May require retesting:
Units with center columns tested in contact with the ground and/or units with casters not tested in the worst case position require retesting
15.4Drop Test – Dynamic – Test ProceduresLimited number of identical seating positions to be evaluated (minimum two) for both functional and proof load.
16.1Leg Strength Test – Front and Side – ApplicabilityTest is no longer applicable to folding chairs without locking mechanisms.
No retesting required:
Test scope reduced, allows greater flexibility for testing, proof load now limited and applied for less time
16.3.1 & 16.4.1Leg Strength Test – Front and Side – Test SetupRestraining device may now be used to prevent unit from overturning.
16.3.2.2 & 16.4.2.2Leg Strength Test – Front and Side – Test Procedure – Proof Load-Proof load now limited to 150 lbf.
-Proof load now held for 10 seconds instead of 1 minute
17.1Unit Drop Test – Dynamic – Applicability-Test is no longer applicable to units with casters.
-Units to be combined with other units to be tested in combined configuration.
May require retesting:
Combined units that were not tested together will require retesting
18.1.3 & 18.2.3Caster/Unit Base Durability Test – Cyclic – Test SetupLoad on unit increased to 270 lbs from 250 lbs.Retesting required:
Increased load on unit makes test more severe
19.3Swivel Test – Cyclic – Test Setup-Load on seat increased to 270lbs from 250lbs.
-Added clarification regarding “return-to-center” mechanisms.
Retesting required:
Increased load on unit makes test more severe
20.1Tilt/rocker/glider Mechanism Test – Cyclic – ApplicabilityClarified that test applies to units with rocker or glider mechanisms but not to curved bottom rocking chairs or reclining mechanisms (see new test #25)
Retesting required:
Increased load on unit makes test more severe
20.3Tilt/rocker/glider Mechanism Test – Cyclic – Test SetupLoad on seat increased to 240 lbs from 225 lbs.
21.1Stability Tests – Applicability-Now only applicable to units with backrests >7.9inch high
-Individual segments of ganged units tested individually unless otherwise specified by manufacturer.
May require retesting:
Ganged units that were not tested this way may require retesting
21.3.1Rear-Stability for Non-tilting Units – Test Setup-Added additional guidance for units with casters and rotating units.
-Glides now adjusted to midpoint rather than worst case position.
-Added additional guidance for disk positioning.
-Force now applied 0.25 inch from the top disk instead of 0.24 inch.
No retesting required:
Changes make test less severe
21.4Rear-Stability for Tilting UnitsAdded note to clarify that test is applicable to recliners.May require retesting:
If recliners were not previously tested
21.4.1Rear-Stability for Tilting Units – Test Setup-Glides now adjusted to midpoint rather than worst case position.
-Use of new template to locate position of disks on the unit.
Retesting required:
Changes result in a slightly different test method.
21.4.2Rear-Stability for Tilting Units – Test ProcedureTest procedure modified to be more in-line with BIFMA X5.1.
21.5Front Stability for Units <80 lbsNew test procedure for units<80lbs more in-line with BIFMA X5.1.May require retesting:
Units <80 lbs will need to be retested.
21.6Front Stability for Units ≥80 lbsAdded note to clarify that test is applicable to units/recliners without legrests or with retracted legrests.
May require retesting:
If recliners not tested as described
21.6.1Front Stability for Units ≥80 lbs – Test Setup-Glides now adjusted to midpoint rather than worst case position.
-Added statement that recliner legrests shall be retracted.
21.6.2Front Stability for Units ≥80 lbs – Test ProcedureA fixed force of 32 lbf now applied to all units rather than force required to transfer unit weight to front legs.
22.3Tablet Arm Load Ease – Test Setup-Load decreased to 55 lbs from 77 lbs.
-Load application point is now 1 inch from edge instead of tablet center.
May require retesting:
Configuration of the tablet arm may make the new test setup more severe, even with decreased load.
24Structural Durability Test – Side-to-Side – CyclicNew test similar to the one in BIFMA X5.1.May require retesting:
If this test is applicable to the unit it must be done
25Cycle Test for Recliners – Backrest and/or Legrest Mechanism DurabilityNew test.May require retesting:
Recliners need to be tested
26Legrest Strength Test – Static LoadNew test.May require retesting:
Recliners with integral legrests need to be tested
27Footrest Static Load Test for Stools – VerticalNew test.May require retesting:
Stools with legrests need to be tested
28Footrest Durability Test for Stools – Vertical – CyclicNew test.May require retesting:
Stools with legrests need to be tested
Appendix AImpact Test Bag ConstructionSand removed as possible fill media.May require retesting:
If your lab uses sand in their impact bags
Appendix BStability Disk Construction DetailsAdded informative text for clarification.No retesting required:
Intent of the Appendix is unchanged
Appendix CFront Stability Load Locator FixtureNew appendix (informative).
No retesting required:
Informative Appendices
Appendix DWeight Loads/RatingsNew appendix (informative).
Appendix ERecliner Pinch Point CautionsNew appendix (informative).
Appendix FExample of a Recliner Cycle Test FixtureNew appendix (informative).
Appendix GRecliner Front Stability with Legrest ExtendedNew appendix (informative).
Appendix HFigure of Leg-Base ChairNew appendix (informative).
Appendix ITemplate for Rear StabilityNew appendix, NormativeRetesting required:
see rear-stability above
Appendix JSummary of ChangesNew appendix (informative).
No retesting required:
Informative Appendices
Appendix KGuidance for Seating Units or Tables with Privacy ScreensNew appendix (informative).
Appendix LGuidance for Seating FlammabilityNew appendix (informative).
Appendix MStructural Durability Test – Front-to-Back – CyclicNew appendix (informative).
Appendix NGuide for Seating Positions for Non-linear Multiple Seating UnitsNew appendix (informative).

BIFMA X5.4 Test #8

La vidéo ci-dessous porte sur le test #8 de la norme BIFMA X5.4 qui évalue la durabilité d’un dossier de canapé utilisé dans des lieux publics à une force appliquée verticalement.

BIFMA X5.5 Test #23

La vidéo suivante concerne le test #14.3 de la norme BIFMA X5.4 qui évalue la durabilité de l’assise d’une pièce de mobilier, comme un sofa par exemple, utilisée dans un lieu public.

Autres méthodes d’essai qui pourraient vous intéresser :

Pour voir d’autres méthodes d’essai en lien avec BIFMA  X5.4, veuillez consulter les Essais BIFMA. Pour les chaises pour personnes corpulantes, BIFMA X5.11 devrait être utilisé.  Les produits de bureaux devraient être testés selon BIFMA X5.5, les systèmes à panneaux selon BIFMA X5.6, les unités de storage selon BIFMA X5.9, sièges éducatifs selon BIFMA X6.1, et sièges à usage occasionnel selon BIFMA X6.4.  Finalement, pour les chaises d’appoints vendues aux établissements de santé, les manufacturiers devraient considérer BIFMA HCF 8.1 pour les lignes directrices de propreté de la surface.