ISO 7174-1:1988 pdf download. Furniture — Chairs — Determination of stability — Part 1: Upright chairs and stools.
Scope and field of application
This part of ISO 7174 describes methods for determining the stability of all types of upright chairs, stools and pouffes. It does not apply to settees and other multiple seating, nor to reclining chairs when they are reclined, chairs with tilting mechanisms when they are tilted, nor to swivelling or rocking chairs. The methods are, however, applicable to testing chairs with reclining, tilting and adjustable back-angle mechanisms when these are used as upright chairs.
Part 2 of ISO 7174 deals with stability for chairs with tilting or reclining mechanisms when fully reclined.
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, he test should be carried out as far as possible as described and deviations from the test procedure recorded in the test report.
The annex does not form part of IS07174-1. The chart demonstrates how this part of ISO 7174 may be applied to any type or design of adult chair. The stability requirements con tained in it should be considered as suggestions only.
2 Reference
ISO 7173 Furniture – Chairs and stools – Determination of strength and durability.
3 Definition
stability: Ability to withstand forces that tend to cause the article to overturn.
Test equipment
4.1 Loading pad, rigid circular object 200 mm in diameter with a face having a convex spherical curvature of 300 mnm radius with a 12 mm edge radius. It shall be designed to remain in pos ition without restricting the freedom of the chair to overturn.ISO 7174-1:1988 pdf download.