2022 Manitoba Workplace Safety and Health Act and Regulation

Demolition by explosives
33.8
When an explosive is to be used to carry out the demolition work,
an employer must ensure that
(a) a competent person develops a demolition procedure to
protect the safety and health of workers; and
(b) the worker who uses the explosives does so in accordance with
the requirements of Part 34 (Explosives).
Demolition by pushing or pulling
33.9(1) An employer must ensure that
(a) when a part of a building or structure is demolished by
pushing, the point at which the force is applied is located
(i) at least two-thirds up the height of the part, measured
from the base of the part being pushed, or
(ii) at the point specified by a professional engineer; and
(b) when a part of a building or structure is demolished by pulling,
(i) the horizontal distance from the machine used for the
pulling to the face of the part being pulled is at least 20%
greater than the height of the part, and
(ii) no person stands between the machine and the building
or structure.
33.9(2) When carrying out demolition work, an employer must ensure that
no crane boom is used for pushing or pulling a building or structure.

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Workplace Safety And Health Regulation
289
Presence of pre-stressed concrete parts
33.10 
An employer must
(a) determine whether pre-stressed or post-tension concrete parts
are present in the building or structure being demolished; and
(b) if present, ensure those parts are demolished in accordance with
the specifications of a professional engineer.
Structural members 
33.11 
If structural members are present in the building or structure being
demolished, an employer must ensure that each member that is
being removed is
(a) not placed under any stress other than its own weight; and
(b) secured or supported to prevent it from dropping or swinging
uncontrollably.

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Workplace Safety And Health Regulation
290