AS 4420.1:2016 Windows, external glazed, timber and composite doors—Methods of test
3.3.2 Location of displacement measuring devices
Displacement readings shall be taken on the test specimen at nominated locations that would represent the maximum expected structural movement. These shall be at least at the ends and point of maximum deflection.
NOTE: Typically this should be the mid-span of structural members and swinging door stiles. The location of the probes should be as close to the ends of the structural member as possible.
The framework to support the displacement measuring devices shall be rigidly fixed, independent of the test specimen.
Before tests are commenced, the location of all displacement measuring devices shall be agreed between the client and the test laboratory.
3.3.3 Test procedure
The test procedure and loading sequence shall be as follows:
(a) An initial pressure equivalent to 50% of the test pressure shall be applied to the test specimen and held for one minute. This shall be taken as a settling-in take-up period.
(b) The pre-load pressure shall be removed and the zero position of the displacement measuring devices recorded.
(c) Differential pressures in the same direction shall then be applied across the test specimen in not less than four approximately equal increments until the test pressure is reached. The pressure shall be held for at least one minute at each pressure increment, and the readings of the displacement measuring devices recorded before the pressure is increased.
(d) The differential pressure shall be removed and after two minutes the zero displacement readings shall be taken.
(e) The direction of the pressure device, or test specimen shall be reversed and Steps (a) to (d) shall be repeated using the opposite test loading.
4.3.2 Sliding sashes
With the window closed but unlocked, an operating force shall be applied, with effort that approximates typical usage, without shock, in the plane and direction of the sash operation for both directions of sash travel. The following forces shall be noted and recorded:
(a) That capable of setting the sash in motion.
(b) That capable of maintaining the motion after the sash frame is clear of the perimeter frame of the test specimen.
Each sliding sash of the test specimen shall be tested separately.