BIFMA X5.41

BIFMA X5.41 « Large Occupant Public and Lounge Seating » a été publié le 24 mai 2021 par BIFMA (Business Institutional Furniture Manufacturer’s Association). Cette norme s’applique aux sièges dont l’occupant a une masse corporelle comprise entre 400 lb et 600 lb, ce qui représente une personne aux États-Unis du 99e percentile. BIFMA X5.4 est destiné aux sièges dont l’occupant a une masse corporelle jusqu’à 275 lb. BIFMA X5.41 est divisé en deux niveaux :

  • 41-400 pour les utilisateurs de 400 lb et
  • 41-600 pour les utilisateurs de 600 lb

En général, BIFMA X5.4 et X5.41 sont similaires puisque les procédures d’essai sont les mêmes. Cependant, la plupart des charges et forces ont été augmentées pour la version BIFMA X5.41. Ainsi, pour que les chaises soient admissibles au BIFMA X5.41, elles doivent avoir une largeur d’assise minimale de 22 pouces pour X5.41-400 et de 26 pouces pour X5.41-600.

Comme dans BIFMA X5.4, il existe quatre « styles » de sièges qui s’appliquent à la fois aux configurations de sièges uniques et multiples :

  • Style A : Avec appuis-bras et avec dossier
  • Style B : Avec appuis-bras et sans dossier
  • Style C : Sans appuis-bras et avec dossier
  • Style D : Sans appuis-bras et sans dossier

Le tableau ci-dessous indique quels essais doivent être effectués sur chacun des styles de chaise pour des configurations de sièges à usager unique et multiples et si la fonctionnalité testée est disponible et l’essai est applicable :

# d’essaiDescription de l’essaiStyle de siège uniqueStyle de sièges multiples
ABCDABCD
5Test de force du dossier- Horizontal – StatiqueXXXX
6Test de force du dossier – Vertical – StatiqueXXXX
7Test de durabilité du dossier – Horizontal – CycliqueXXXX
8Test de durabilité du dossier – Vertical – CycliqueXXXX
9Test de force des appuis-bras – Horizontal – StatiqueXXXX
10Test de force des appuis-bras – Vertical – StatiqueXXXX
11Test de durabilité des appuis-bras- Horizontal – Cyclique – Positions MultiplesXX
12Test de durabilité des appuis-bras – Vertical – Cyclique – Positions MultiplesXX
13Durabilité des appuis-bras pour les unités à siège uniqueXX
14Essai de durabilité des sièges – Impact cycliqueXXXXXXXX
15Test de chute – DynamiqueXXXXXXXX
16Test de force sur les pattes du siègeXXXXXXXX
17Test de chute unitaire – DynamiqueXXXXXXXX
18Test de durabilité sur roulette/unité de base pour les unités piédestalXXXXXXXX
19Test de pivotement – CycliqueXXXX
20Test du mécanisme d’inclinaison – CycliqueXXXX
21Tests de stabilitéXXXXXXXX
22Test de facilité de charge de l’accoudoir pour tablette – CycliqueXXXXXXXX
23Test de charge statique de l’accoudoir pour tabletteXXXXXXXX
24Test de durabilité structurelle – Côte à côte – CycliqueXXXXXXXX
25Test cyclique pour fauteuils inclinables – Durabilité du mécanisme du dossier et/ou du repose-jambesXXXX
26Test de résistance des repose-jambes – Charge statiqueXXXX
27Test de charge statique des repose-pieds pour tabourets – VerticalXXXXXXXX
28Test de durabilité des repose-pieds pour tabourets – Vertical – CycliqueXXXXXXXX
29Mesure de la largeur du siègeXXXXXXXX

Pour télécharger une version en format PDF de ce tableau, cliquez sur ce bouton.

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De plus, nous avons inclus une comparaison test par test entre cette norme et BIFMA X5.4 pour vous donner une meilleure compréhension des différences entre les deux normes.

ANSI/BIFMA X5.41-2021ANSI/BIFMA X5.4-2020ComparisonConclusion
SectionX5.41-400X5.41-600
1. Scope400 lb user is the basis of the standard (99th percentile)600 lb user is the basis of the standard (99th percentile)275 lb user is the basis of the standard (95th percentile)X5.41 has a higher user weight than X5.4
2. Definitions: seat or seating position: Determine number of seating positions by dividing unit width by 31″
X5.41-400: minimum seat width=22″
seat or seating position: Determine number of seating positions by dividing unit width by 35″
X5.41-600: minimum seat width=26″
seat or seating position: Determine number of seating positions by dividing unit width by 28″X5.41 determines the seating positions using a larger denominator than X5.4.
X5.41 has added seat width requirements.
3. GeneralNo difference.No difference.No difference between X5.4 and X5.41.Both methods equivalent.
4. Classification and Applicable TestsSeat width measurement test is applicableNo seat width measurement required.BIFMA X5.41 has an additional seat width measurement test.X5.41 covers X5.4
5. Backrest Strength Test – Horizontal – StaticFunctional Load: 150 lbf applied to each seating position (max 2) for 1 minute.
Proof Load: 250 lbf applied to each seating position (max 2) for 10 seconds.
Functional Load: 200 lbf applied to each seating position (max 2) for 1 minute.
Proof Load: 300 lbf applied to each seating position (max 2) for 10 seconds.
Functional Load: 150 lbf applied to each seating position (max 2) for 1 minute.
Proof Load: 250 lbf applied to each seating position (max 2) for 10 seconds.
Higher force applied in X5.41-600X5.41 covers X5.4
6. Backrest Strength Test – Vertical – StaticFunctional Load: 200 lbf applied to each seating position (max 2) for 1 minute.
Proof Load: 300 lbf applied to each seating position (max 2) for 10 seconds.
Functional Load: 200 lbf applied to each seating position (max 2) for 1 minute.
Proof Load: 300 lbf applied to each seating position (max 2) for 10 seconds.
No difference between X5.4 and X5.41.Both methods equivalent.
7. Backrest Durability Test – Horizontal – CyclicLoad applied to backrests: 75 lbf
Load on other seats: 350 lbs
120,000 cycles
Load applied to backrests: 100 lbf
Load on other seats: 540 lbs
120,000 cycles
Load applied to backrests: 75 lbf
Load on other seats: 240 lbs
120,000 cycles
The force applied to the backrest and the load on other seats are both higher in X5.41.X5.41 covers X5.4
8. Backrest Durability Test – Vertical – CyclicLoad applied to backrests: 200 lbf
10,000 cycles
Load applied to backrests: 200 lbf
10,000 cycles
No difference between X5.4 and X5.41.Both methods equivalent.
9. Arm Strength Test – Horizontal – StaticFunctional Load:
-Arm distance < 35″: 100 lbf for 1 minute
-Arm distance ≥ 35″: 133 lbf for 1 minute
Proof Load:
-Arm distance < 35″: 150 lbf for 10 seconds
-Arm distance ≥ 35″: 200 lbf for 10 seconds
Functional Load:
-Arm distance < 35″: 100 lbf for 1 minute
-Arm distance ≥ 35″: 133 lbf for 1 minute
Proof Load:
-Arm distance < 35″: 150 lbf for 10 seconds
-Arm distance ≥ 35″: 200 lbf for 10 seconds
No difference between X5.4 and X5.41.Both methods equivalent.
10. Arm Strength Test – Vertical – StaticFunctional Load:
-Armrest width > 3″: 200 lbf for 1 minute
-Armrest width ≤ 3″: 169 lbf for 1 minute
Proof Load:
-Armrest width > 3″: 300 lbf for 10 seconds
-Armrest width ≤ 3″: 253 lbf for 10 seconds
Functional Load:
-Armrest width > 3″: 200 lbf for 1 minute
-Armrest width ≤ 3″: 169 lbf for 1 minute
Proof Load:
-Armrest width > 3″: 300 lbf for 10 seconds
-Armrest width ≤ 3″: 253 lbf for 10 seconds
No difference between X5.4 and X5.41.Both methods equivalent.
11. Arm Durability Test for Multiple Seat Units – Horizontal – Cyclic Note to use Test #13 when armrests are included between seating positions.
Force applied: 100 lbf
50,000 cycles
Force applied: 100 lbf
50,000 cycles
X5.41 has note that refers to Test #13 when armrests are included between seating positions. Otherwise, no difference between methods.Methods are equivalent when no armrests included between seating positions.
12. Arm Durability Test for Multiple Seat Units – Vertical – Cyclic Note to use Test #13 when armrests are included between seating positions.
Force applied: 150 lbf
10,000 cycles
Force applied: 150 lbf
10,000 cycles
X5.41 has note that refers to Test #13 when armrests are included between seating positions. Otherwise, no difference between methods.Methods are equivalent when no armrests included between seating positions.
13. Arm Durability test – Angular – Cyclic Added statement that test applies to units with armrests between seating positions.
Force applied: 100 lbf
60,000 cycles
Added statement that test applies to units with armrests between seating positions.
Force applied: 125 lbf
60,000 cycles
Force applied: 90 lbf
60,000 cycles
X5.41 has note that states this method is applicable to units with armrests included between seating positions. Loads in X5.41 are higher.For single seat units, X5.41 covers X5.4. For multi-seat units with armrests between seating positions, methods are not equivalent.
14. Seating Durability Tests – Cyclic Test bag: 200 lbs
Drop height: 1.4″ above uncompressed seat
Load on other seats: 350 lbs
100,000 cycles
Test bag: 225 lbs
Drop height: 1.4″ above uncompressed seat
Load on other seats: 540 lbs
100,000 cycles
Test bag: 125 lbs
Drop height: 1.4″ above uncompressed seat
Load on other seats: 240 lbs
100,000 cycles
Higher loads in X5.41.X5.41 covers X5.4
15. Drop Tests – DynamicFunctional Load: 250 lb test bag
Proof Load: 350 lb test bag
Drop height: 6″ above uncompressed seat
Load on other seats: 350 lbs
Functional Load: 275 lb test bag
Proof Load: 400 lb test bag
Drop height: 6″ above uncompressed seat
Load on other seats: 540 lbs
Functional Load: 225 lb test bag
Proof Load: 300 lb test bag
Drop height: 6″ above uncompressed seat
Load on other seats: 240 lbs
Higher loads in X5.41.X5.41 covers X5.4
16.3 Leg Strength Test – Front Load TestFunctional Load: 100 lbf applied to each front leg for 1 minute.
Proof Load: 150 lbf applied to each front leg for 10 seconds.
Functional Load: 125 lbf applied to each front leg for 1 minute.
Proof Load: 190 lbf applied to each front leg for 10 seconds.
Functional Load: 75 lbf applied to each front leg for 1 minute.
Proof Load: 150 lbf (max) applied to each front leg for 10 seconds.
Higher loads in X5.41.X5.41 covers X5.4
16.4 Leg Strength Test – Side Load TestFunctional Load: 100 lbf applied to a front and rear leg individually for 1 minute.
Proof Load: 150 lbf applied to a front and rear leg individually for 10 seconds.
Functional Load: 75 lbf applied to a front and rear leg individually for 1 minute.
Proof Load: 150 lbf (max) applied to a front and rear leg individually for 10 seconds.
Higher loads in X5.41.X5.41 covers X5.4
17. Unit Drop Test – DynamicDrop heights based on unit weight from Table 2Drop heights based on unit weight from Table 2.No difference between X5.4 and X5.41.Both methods equivalent.
18.1 Caster/Unit Base Durability Test for Pedestal Base UnitsLoad on seat: 400 lbs
25,500 cycles
Load on seat: 600 lbs
25,500 cycles
Load on seat: 270 lbs
25,500 cycles
Higher loads in X5.41.X5.41 covers X5.4
18.2 Caster/Unit Base Durability Test for Units with LegsLoad on seat: 400 lbs
25,500 cycles for 1-seater units.
250 cycles over obstacles for multi-seater units.
Load on seat: 600 lbs
25,500 cycles for 1-seater units.
250 cycles over obstacles for multi-seater units.
Load on seat: 270 lbs
25,500 cycles for 1-seater units.
250 cycles over obstacles for multi-seater units.
Higher loads in X5.41.X5.41 covers X5.4
19. Swivel Test – CyclicLoad on seat: 400 lbs
120,000 cycles
Load on seat: 600 lbs
120,000 cycles
Load on seat: 270 lbs
120,000 cycles
Higher loads in X5.41.X5.41 covers X5.4
20. Tilt/Rocker/Glider Mechanism Test – CyclicLoad on seat: 350 lbs
200,000 cycles
Load on seat: 540 lbs
200,000 cycles
Load on seat: 240 lbs
200,000 cycles
Higher loads in X5.41.X5.41 covers X5.4
21.3 Rear-Stability for Non-tilting Units-6 disks
-Force calculated from formula in 21.3.1j or 20.9 lbf
-Force applied 0.25 inch from top of disk
-6 disks
-Force calculated from formula in 21.3.1j or 20.9 lbf
-Force applied 0.25 inch from top of disk
No difference between X5.4 and X5.41.Both methods equivalent.
21.4 Rear-Stability for Tilting Units13 disks13 disksNo difference between X5.4 and X5.41.Both methods equivalent.
21.5 Front Stability for Units Less than 80 lbs175 lbf vertical load applied at 2.4″ from front edge135 lbf vertical load applied at 2.4″ from front edgeHigher loads in X5.41.X5.41 covers X5.4
21.6 Front Stability for Units ≥ 80 lbs.32 lbf downward at 45° to the test platform.32 lbf downward at 45° to the test platform.No difference between X5.4 and X5.41.Both methods equivalent.
22. Tablet Arm Load Ease Test – CyclicLoad applied: 55 lbs
100,000 cycles
Load applied: 55 lbs
100,000 cycles
No difference between X5.4 and X5.41.Both methods equivalent.
23. Tablet Arm Load Test – StaticLoad applied: 150 lbsLoad applied: 150 lbsNo difference between X5.4 and X5.41.Both methods equivalent.
24. Structural Durability Test – Side-to-Side – CyclicLoad applied: 100 lbf
Load on other seats: 350 lbs
25,000 cycles
Load applied: 100 lbf
Load on other seats: 540 lbs
25,000 cycles
Load applied: 75 lbf
Load on other seats: 240 lbs
25,000 cycles
Higher load applied to the unit  and higher loads on seats in X5.41.X5.41 covers X5.4
25. Cyclic Test for Recliners – Backrest and/or Legrest Mechanism DurabilityLoad applied on backrest: 180 lbs
Load on seat: 180 lbs
Load on legrest: 35 lbs
25,000 cycles
Load applied on backrest: 270 lbs
Load on seat: 270 lbs
Load on legrest: 50 lbs
25,000 cycles
Load applied on backrest: 124 lbs
Load on seat: 124 lbs
Load on legrest: 27 lbs
25,000 cycles
Higher loads in X5.41.X5.41 covers X5.4
26. Legrest Strength Test – Static LoadLoad applied to legrest: 40 lbsLoad applied to legrest: 60 lbsLoad applied to legrest: 30 lbsHigher loads in X5.41.X5.41 covers X5.4
27. Footrest Static Load Test for Stools – VerticalFunctional Load: 150 lbf for 1 minute and then 300 lbf for 1 minute
Proof Load: 400 lbf for 10 seconds
Functional Load: 100 lbf for 1 minute and then 200 lbf for 1 minute
Proof Load: 300 lbf for 10 seconds
Higher loads in X5.41.X5.41 covers X5.4
28. Footrest Durability Test for Stools – Vertical – CyclicLoad applied: 300 lbf
50,000 cycles
Load applied: 200 lbf
50,000 cycles
Higher loads in X5.41.X5.41 covers X5.4
29. Seat Width MeasurementMinimum seat width: 22 inchesMinimum seat width: 26 inchesThis test not in X5.4.New section in X5.41.X5.41 covers X5.4
Appendices A, C, D, E, F, G, H, J, K, L, MInformativeInformativeN/ANo impact.
Appendices B, INo difference with X5.4.No difference with X5.41.No difference between X5.4 and X5.41.Both methods equivalent.

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