This part of ISO 7174 describes methods for determining the rearward stability of chairs with tilting, reclining and adjustable back angle mechanisms when they are fully tilted or reclined, and of rocking chairs. Forward and sideward stability of these chairs and of upright chairs is determined by methods described in ISO 7174-1. This part of ISO 7174 describes test methods only for the rearward stability of chairs when fully tilted or reclined, and should not be considered as an alternative test for upright chairs. The test results are only valid for the article tested. When the test results are intended to be applied to other similar articles, the test specimen should be representative of the production model. In the case of designs not catered for in the test procedures, the test is to be carried out as far as possible as described, and deviations from the test procedure recorded in the test report. NOTE 1 This International Standard is one of a series being prepared on the strength, durability and stability of furniture. The series currently consists of the International Standards listed in annex A.