Summary of Significant Changes for BIFMA x5.1-2017
Scope – added nesting folding chairs and 275 lbs. was 253 lbs.
Definitions – added general-purpose office chair, general-purpose large occupant office chair, nesting folding chair, and leg-base; and modified form fitting device and tablet arm
General – added reference to ISO CMD, revised tolerance language, and added a temperature and humidity suggestion
Backrest Strength – 70 degrees for Type I and II was 90 degrees, and forces modified for all Types (harmonized to 150/225 lbf. – formerly 200/300 for Type I and formerly 150/250 for Type II and III), Type I and II combined (was Type II and III combined). Added Note: For this test, the test platform may be placed at an angle to facilitate testing/load application.
Base Test – moved to Informative Annex (thus no longer Normative)
Drop Test – added requirement that if applicable a center column may not touch the platform/floor during the functional drop (raised platform or hole in test platform is acceptable).
Swivel Test – 270 lbs. was 250 lbs.
Tilt Mechanism Test – 240 lbs. was 225 lbs.
Seating Durability – clarified Bag requirements and 200 lbf. was 165 lbf. Drop height of 36mm (1.4”) was 30mm (1.2”). For 5-star base with casters, one leg is placed forward and the caster on that leg is oriented 90 degrees. All casters are oriented at 90 degrees for pedestal base chairs and front to back for 4 leg chairs. For Impact test: Note: For chairs with lockable seat angles, the seat shall be tested in the unlocked position.
Stability Tests – added rear stability disk locating method and require pulling back to full tilt position when loading disks (new method is optional for Type I and II). Added reference to optional fixture for locating the front stability load point.
Arm Strength Vertical – proof test at 15 seconds was 1 minute
Arm Strength Horizontal – proof test at 15 seconds was 1 minute
Backrest Durability – load in seat of 240 lbs. was 225 lbs. Added note regarding tilt lock mechanisms for Type II / III.
Caster Durability – added notes and clarifications, 30” +/- 2 was 30” minimum, 270 lbs. in the seat was 250 lbs., Caster/Chair Frame Durability Test for Non-pedestal Chairs with Casters was Caster/Chair Frame
Durability Test for Chairs with Legs Leg Strength – no significant change (note Informative Annex H offers Simultaneous Side test)
Footrest Tests – applicable to units with seat heights of 24 inches or greater for durability.
Armrest Durability – no significant change
Outstop – no significant change Tablet
Arm Static Load – no significant change Tablet
Arm Load Ease – 55 lbs. at 1” was 77 lbs. centered
Structural Durability – new test similar to that found in ANSI/BIFMA X5.11
Appendix A Test Bag – no change
Appendix B Stability Disk – no change Appendix C Base Test – was previously normative Section 7
Appendix D Front Stability Load Locator Fixture – new informative Appendix E Weight Loads / Ratings – new informative Appendix F Summary of Changes – new informative Appendix G Template for Rear Stability – new appendix
Appendix H Simultaneous Side Legs Strength Test – new informative
Appendix J Figure of Leg-Base Chair – new informative