112(1)An employer and a contractor shall each ensure that a hatchway, chute, pit or trap-door opening into which an employee may fall is guarded
(a)
by guardrails that are removable on not more than two sides and that are fixed on the other exposed sides, or
(b)
by a flush hinged cover of adequate strength and adequately supported with attached railings so as to leave only one side of the opening exposed when the cover is open.
112(2)Subsections 111(2) and (3) apply with the necessary modifications to a hatchway, chute, pit or trap-door opening referred to in subsection (1).