Article 25 -Dynamic Test of Escalator Step – Load Test
In our previous article we talked about static test of moving walk pallet in-depth. Now, in order to complete the rest of the story regarding static testing in the current article we will be discussing everything about dynamic test of escalator step and it will be only regarding load test. The information regarding the torsional test will be explained in detail in the next article.
Load Test - Dynamic Test of Escalator Step
The step dynamic test is divided into two different types: Load and Torsional. The load test is explained in-depth below:
For the step dynamic load test, we must apply a continuous sinusoidal pulsating load of 500 - 3000 N at a frequency of 5-20 Hz for a minimum of 5x106 cycles. The load must should be applied perpendicular to the tread surface center on a steel plate (0.20 m x 0.30 m & at least 25 mm thick).Test must be applied to steps with rollers (not rotating), axles and stub shafts (if existing) together in horizontal position and at maximum inclination.
No cracks or issues must be seen as a result of the test. Permanent deformation must be less than 4 mm on the tread surface and steps and its components including all inserts/ fixings must stay secure and attached firmly after the test.
Any damaged roller must be replaced during the test as required.