Section 49A(16)(e) in The West Bengal Factories Rules, 1958
(e)Where tracks are carried on gantry or other elevation, a safe footway or footways with hand rails and toe-boards shall be provided at all positions where persons works or pass on foot, and where there is an opening in the stage of an elevated track for the dropping of material to a lower level, the position shall be adequately fenced or the opening itself provided with grill through which a person cannot fall.