BS ISO 7171 pdf free download

BS ISO 7171-2019 pdf free download.Furniture – Storage units – Test methods for the determination of stability.
4 General test conditions
4.1 Preliminary preparations
The unit(s)/component(s) shall be tested as delivered. The unit(s)/component(s) shall be assembled and/or configured according to the instructions supplied. Unless otherwise stated, the most adverse configuration shall be used for each test. If mounting or assembly instructions are not supplied, the mounting or assembly method shall be recorded in the test report. Fittings shall be tightened before testing and shall not be re-tightened. If the configuration needs to be changed to produce the worst- case conditions, this shall be recorded in the test report.
During testing, the unit shall be placed on the floor and levelled, unless otherwise specified. Levelling devices shall be set to the mid position but not more than 13 mm from the fully closed position.
Unless otherwise specified by the manufacturer, the sample for test shall be stored in indoor ambient conditions for at least 24 hours immediately prior to testing.
Annex B explains the purpose and the applicability of the test methods that this document contains.
4.2 Application of forces
The test forces shall be applied sufficiently slowly to ensure that negligible dynamic force is applied.
The forces can be replaced by masses. The relationship 10 N = 1 kg shall be used.
Annex A suggests loads and forces to ensure that this document can be of use where no requirements document is available or to assist in the development of one.
4.3 Tolerances
Unless otherwise stated, the following tolerances are applicable to the test equipment:
— Forces: ±5 % of the nominal force;
— Masses: ±1 % of the nominal mass;
— Dimensions: nominal dimension ±1 mm;
— VelocitIes: ±10% of the nominal velocity;
— Angles: nominal angle ±2°.
The accuracy for the positioning of loading pads shall be ±5 mm.
Test forces, masses, dimensions, velocities and angles used to perform the test shall be targeted at the nominal values specified and shall be subjected to the above tolerances.
NOTE For the purposes of uncertainty measurement, test results are not considered to be adversely affected when the above tolerances are met.
4.4 Prevention of movement during test
If a free standing unit tends to slide during the tests, the unit shall be restrained by stops (5.2), which do not prevent overturning.
4.5 Loading
Unless otherwise specified, all storage components shall be uniformly loaded with the load(s) specified in Table 1.
5 Test equipment and apparatus
Unless otherwise specified, the tests can be applied by any suitable device, because results are dependent only upon correctly applied forces and not on the apparatus.
The equipment shall not inhibit deformation of the unit/component, i.e. it shall be able to move so that it can follow the deformation of the unit/component during testing, so that the loads are always applied at the specified points and in the specified directions.
5.1 Floor surface, consisting ala rigid, horizontal and flat surface.
5.2 Stops, consisting of devices to prevent the article from sliding but not tilting. The lowest height that will prevent the item from moving shall be used.
5.3 Masses, which shall be designed so that they do not reinforce the structure or re-distribute the stresses.
5.4 Loads for filing pockets. Suspended Filing pockets shall be loaded with filing paper or an equivalent alternative.
5.5 LoadIng pads, consisting of rigid discs 100 mm in diameter, with a flat face and a 12 mm front edge blend radius. Where space prevents the use of a 100 mm diameter loading pad, a 50 mm diameter loading pad with similar properties can be used.
6 Stability tests
6.1 General
The stability tests shall be carried out with the unit placed on the test floor (&1).
Units for which the manufacturer’s instructions state that they are to be placed against a wall or other rigid vertical structure shall not be tested in the rearward’s direction. Castors and height adjustment devices shall be in the position most likely to cause the unit to overturn.BS ISO 7171 pdf download.