The West Bengal Lift, Escalator And Travelator Rules, 2022State Rules of West Bengal · 2019
(1) The factor of safety based on the static loads shall be at least as follow:
(a) For trusses and all structural members including tracks - five.
(b) For driving machine parts:
(i) Where made of steel or bronze
(ii) Where made of cast iron or other materials
(c) For power transmission members - eight.
-ten.
-ten,
(2) Step change composed of cast steel links which, if thoroughly annealed shall be permitted with a factor of safety of twenty.
(3) The Escalator truss or girders shall be designed to safely sustain the steps and running gear in operation. In the event of failure ofthe track system it shall retain the running gear in its guides.
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