Section 67G(16)(e) in The Punjab Factory Rules, 1952
(e)Where tracks are carried on a ganty or other elevation, a footway or footways with hand rails and toe-boards shall be provided at all positions where persons work or pass on foot; and where there is an opening in the stage of an elevated track for the dropping of materials to a lower level, the position shall be adequately fenced or the opening itself provided with a grill through which a person cannot fall.