Abstract： AS/NZS 4688.2:2000 pdf download.Furniture—Fixed height chairs Part 2: Determination of strength and durability. 7.2 Back static load test Position the centre of the back loading pad (6.5) either at the back loading position as specified b...

AS/NZS 4688.2:2000 pdf download.Furniture—Fixed height chairs Part 2: Determination of strength and durability.

7.2 Back static load test

Position the centre of the back loading pad (6.5) either at the back loading position as specified by the chair loading position

template (see figure 20) or at 100 mm below the top of the back, whichever is the lower. Prevent the chair from moving rearwards by placing stops behind the rear feet or castors.

Apply the test load of the appropriate magnitude specified r the table perpendicular to the back when under load.

Conduct the test by the application of the load 10 times, with the balancing seat load specified in the table applied at the seat

loading position (see the annex). During each application, maintain the load for at least 10 s.

The back static force shall be at least 410 N. If the chair tends to overbalance at this force, the force applied to the seat shall be increased until this tendency ceases.

When this test is applied to a chair fitted with a spring rocking action base that has a tension adjustment, increase the tension

so that the least possible rocking movement is obtained during the test.

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