Protection of Open-sided Floors, Platforms, and Runways. [1910.23(c)]

1910.23(c)(1)(i) Persons can pass,
1910.23(c)(1)(ii) There is moving machinery.
1910.23(c)(1)(iii) There is equipment with which falling materials could create a hazard, or
1910.23(c)(1) Every open-sided floor or platform 4 feet or more above adjacent floor or ground level shall be guarded by a standard railing (or the equivalent as specified in paragraph (e)(3) of this section) on all open sides except where there is entrance to a ramp, stairway, or fixed ladder. The railing shall be provided with a toeboard wherever, beneath the open sides, (See i, ii, and iii above)