“It may not be possible for all risk to be eliminated from a workplace […] but it does not follow that employers need do only as little as is specifically prescribed in the regulations. There may be cases in which more is required – in which additional safety precautions tailored to fit the distinctive nature of a workplace are reasonably required by the “general duty clause” in order to protect workers.”

Ontario (Labour) v Quinton Steel (Wellington) Limited (2017 ONCA 1006 (CanLII)), para.45.

The OHSA “general duty” clause: s.25(2)(h):

“(2) Without limiting the strict duty imposed by subsection (1), an employer shall,
[…]
“(h) take every precaution reasonable in the circumstances for the protection of a worker”.