A-A-703A
Chair controls. Seat height adjustment range shall be not less than 24 in (6.4 cm). The seat and back shall tilt not less than 16 degrees nor more than 24 degrees. The seat height adjustment and tilt tension adjustment shall be easily accomplished. The seat height shall not change unintentionally when occupied. Hardware used for the chair controls shall be modern contemporary design with an attractive corrosion resistant finish. The height adjusting mechanism shall be warranted for a period of five (5) years against defects in material or workmanship with repair or replacement made at no cost to the Government.
Adjustment instructions. Instructions shall be attached to the chair which clearly illustrates where the seat height and tilt tension adjustments are located and how these adjustments are accomplished.
Identification marking. The bottom of the chair seat shall be clearly and permanently marked with the following information: manufacturer’s name or trademark, contract or order number, national stock number, and month and year of manufacture.
Safety features. The tilting mechanism shall have a positive tilt stop in case of failure. The seat shall not separate from the base during seat raising; the seat shall be securely attached to the base when adjusted to the maximum seat height; and the seat shall be incapable of unintentional separation from the base. There shall not be any defects or conditions that in any way could be hazardous to personnel or their clothing.
Workmanship. There shall not be any defects or conditions that impair appearance, function, serviceability, comfort or durability of the chair. The chair shall be neatly upholstered with an attractive finished appearance. There shall not be any gaps between the upholstery and the outer shell around the entire perimeter. Movable parts shall be properly lubricated to prevent wear and annoying noise. All exposed metal shall have an attractive corrosion resistant finish.
Performance tests. The chair shall pass the following tests:
(1) The tests in ANSI X5.1-1977 and Amendment X5.1a-1979 listed below.
ANSI X5.1-1977 TESTS
4. Back Pull Test
5. Base Test
8. Drop Test
9. Swivel Cycling Test
11. Seating Impact Test (Cyclic)
12. Stability Test- Use test in ANSI X5.1a-1979 for Type IV chairs.
16. Back Durability Test
17. 17. Caster Durability Test-
Use obstacle course for 36,000 cycles with one caster failure allowed before 20,000 cycles and two caster failures allowed before 36,000 cycles.
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