2022 Manitoba Workplace Safety and Health Act and Regulation

Required inspection
26.18(1) An employer must ensure that a support structure is immediately
inspected by a professional engineer if
(a) a safety and health officer is of the opinion that the support
structure may create a risk to the safety or health of a worker;
or
(b) there is a change in ground stability in the excavation in which
the support structure has been installed.
26.18(2) If an inspection results in a recommendation that the support
structure be redesigned, an employer must ensure that
(a) the structure is redesigned and certified by a professional
engineer; and
(b) the structure is constructed, installed, used, maintained and
dismantled in accordance with the professional engineer’s
specifications.
Reshoring
26.19
If an employer installs reshoring in an excavation, the employer must
ensure that, before a worker enters the excavation, the reshoring or
any other support structure in the excavation is
(a) designed and certified by a professional engineer; and
(b) constructed, used, maintained and dismantled in accordance
with the professional engineer’s specifications.
Support structure when earth exposed
26.20
When 1.5 m of earth is exposed on a side of a vertical excavation
in which a worker is required or permitted to enter, an employer
must ensure that a support structure is immediately installed in the
excavation to support the exposed earth.

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Workplace Safety And Health Regulation
240
Installing shoring
26.21
An employer must ensure that shoring is installed from the top to
the bottom of an excavation in descending order and removed in the
reverse order from which it was installed.
Scaling walls
26.22
If a worker is required or permitted to enter an excavation with a
support structure, an employer must ensure that the walls of the
excavation are scaled and trimmed, where necessary, to reduce the
danger of falling material.