Article 22 -Static Test of Escalator Step Tread Surface
How to Do the Step Deflection Test?
in the static test of escalator step tread surface first for the step deflection test in escalators we must apply a single perpendicular load of 3000 N (including weight of plate) to the tread surface center on a steel plate (0.20 m x 0.30 m & at least 25 mm thick). The edge of the plate which is 0, 20 m long must be arranged parallel to the front edge of the step and the other edge of the plate which is 0, 30 long must be placed at right angles to the front edge of the step.
must not be more than 4 mm and no permanent deformation must be seen but initial tolerance settings are acceptable. This Test must be applied to steps with rollers
(not rotating), axles and stub shafts (if existing) together in horizontal position and at maximum inclination. New tests are not required for inclinations less than the maximum. This test is not required for the installed step together with the guide rails and the truss of the escalator.
What is Step Side Deflection Test?
For the step side deflection test, near the skirting, we must apply a single perpendicular load of 1500 N on a steel plate (50 mm x 50 mm & at least 25 mm thickness) and in this case the deflection of the tread surface on the sides must not exceed 4 mm.
If there are, insert / fixing on the tread surface we must only apply the perpendicular load on insert / fixing itself. The area of the load must be 50 mm by width of the inserts and fixings. Do not change the direction of the applied load during the test. After the test, no permanent deformation must be observed.