ISO 08274 pdf download – Windows and doors一Resistance to repeated opening and closing – – Test method

ISO 08274 pdf download – Windows and doors一Resistance to repeated opening and closing – – Test method.
3.4 reference velocity: Whcn casements, sashes or leaves arc moved by lincar movement, the refcrcncc velocity
is the actual velocity of the moving parts. When leaves or casements are moved by rotation, the reference
velocity is that which can be measured on the closing edge of the member to which is attached the operating
device used to carry out the test. Reference velocity is measured in metres per second (rn/s.)
3.5 rest time: Time in seconds of a stationary period, either between two changes of direction of movement or
between two cycles.
3.6 datum points: Measurement reference points located at 50 mm from each corner of any casement, sash or
door leaf on any joint between moving elements.
4 Principks of test
4.1 General
The test specimen has its fasteners released, its casement, sash or leaf is opened to the required resting position. is brought to the closed position and its fasteners secured again before a final rest. This cycle is repeated for the specified number of times or until failure occurs. The duration of each cycle depends upon the stroke (itself depending upon (he mode ot’ operation of the specimen). upon the reference velocity, and upon the operations carried out during a cycle (see figures 1 and 2).
NOTE lithe test specimen can be operated in more than one mode. e.g. tilt and turn, each may be tested completely and separately on the same specimen. the more frequent mode being addressed first, or the two modes may be tested alternately in a continuous cycle.
4.1.1 Stroke
Side hung casements and leaves are operated from the closed position to an open position of 90 ± 100, or to the stopping position of the restrictor or closing device if this occurs at less than 90. For other modes of operation. casements, sashes or leaves are operated from the closed position to the full opened position unless specified otherwise. However the stopping position shall not be less than 60% of the fully open position.
Unless otherwise specified. dynamic forces shall be applied at both ends of the stroke.
4.1.2 Reference velocity
lithe casement, sash or leaf is manually operated. the reference velocity shall be (0.5 ± (J.(J5)nvs II the moving part has a mass not exceeding 400 kg. and (0.2 ± 0,O2flnfs if the moving part has a mass exceeding 400 kg. unless, for special purposes. the velocity is defined by the relevant standard.
lithe casement, sash or leaf is mechanically operaed during either a part or the whole of the cycle, and if the velocity is adjustable, the reference velocity shall be set as defined above. If not adjustable, the reference velocity shall be the actual velocity allowed by the system.
4.1.3 Force to operate fasteners
For manually operated fasteners, the force applied by the operating equipment shall be (50 ± 101% higher than the initial measurement of operating forces necessary to release and secure the fasteners, determined in accordance with prF.N 12046-1:1996 or prF.N 12046-2:1999.
For motor operated fasteners (either partly or totally) the amplitude of the force shall be (hat set by the mechanism itself.
4.1.4 Opening phase
The fasteners are released by the operating equipment and the casement, sash or leaf is set into motion as continuously as possible, so as to reach the reference velocity within the range 20° to 60° or 20% to 60% of the stroke of the casement, sash or leaf, and continuing at this velocity to the end of the stroke.
4.1.5 Rest time in open position
The rest time shall not be greater than 4 s for manually operated casements or leaves. For motor operated casements, sashes or leaves, the rest time shall be established with the manufacturer before the lest.