2022 Manitoba Workplace Safety and Health Act and Regulation

Hook to have positive means of securement
26.31
An employer must ensure that a hook used for hoisting a worker
or any other object in a deep foundation excavation is fitted with a
positive means of securement.
Guarding deep foundation excavation
26.32
An employer must ensure that a deep foundation excavation is
adequately guarded or covered whenever work on the excavation is
not being performed.
SHAFTS AND TUNNELS
Professional engineer to design support structure
26.33(1) An employer must ensure that, during the excavation of a shaft or
a tunnel, the walls of the shaft or tunnel are retained by a support
structure that is

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Workplace Safety And Health Regulation
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(a) designed and certified by a professional engineer as being of
sufficient strength to prevent the walls from collapsing or caving
in; and
(b) constructed, installed, used, maintained and dismantled in
accordance with the professional engineer’s specifications.
26.33(2) An employer must ensure that the professional engineer’s design
specifications are kept at the site of the excavation of the shaft or
tunnel and are made readily accessible to a worker, on request.
Work areas to be free of mud and debris
26.34
An employer must ensure that the following areas of a shaft
or tunnel excavation are kept free of loose mud and other
accumulations of debris:
(a) the access landing;
(b) the bottom of the shaft or tunnel excavation;
(c) other similar work areas.
Ventilation to be provided
26.35
An employer must provide a suitable ventilation system in a shaft or
tunnel to ensure that
(a) the ventilation rate is at least 0.25 m
3
per second per square
metre of face of the shaft or tunnel; and
(b) the concentrations of toxic vapours, gases, aerosols, dusts or
other hazardous substances are reduced to and remain at levels
that will not be hazardous to the safety or health of a worker.