2022 Manitoba Workplace Safety and Health Act and Regulation

Support structure for deep foundation excavations
26.28(1) An employer must ensure that the support structure for a deep
foundation excavation is designed and certified by a professional
engineer and constructed, installed, used, maintained and dismantled
in accordance with the professional engineer’s specifications.
26.28(2) If a worker is required or permitted to enter a deep foundation
excavation, an employer must ensure that the professional engineer’s
design specifications for the support structure to be used in the
excavation for the deep foundation include a method for the worker
to enter and leave the excavation.
26.28(3) If a worker is required or permitted to enter a deep foundation
excavation, an employer must ensure that the support structure for
the excavation
(a) extends from a point 300 mm above ground level to the point
where work is being carried out;
(b) has a minimum diameter of 700 mm; and
(c) is secured against movement.
Worker to wear body harness
26.29(1) An employer must ensure that a worker in a deep foundation
excavation always wears a full body harness attached to a secured
lifeline. The harness and lifeline must both meet the requirements of
Part 14 (Fall Protection).

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Workplace Safety And Health Regulation
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26.29(2) When a worker is in a deep foundation excavation, an employer must
ensure that the worker’s lifeline
(a) extends to the top of the excavation and is secured in a suitable
manner to an anchorage point as required under Part 14 (Fall
Protection); and
(b) is attended to continuously by at least one other worker.
Hoisting device
26.30(1) If a worker is required or permitted to enter a deep foundation
excavation, an employer must ensure that a tripod-type or similar
hoist is used to lower and raise the worker.
26.30(2) An employer must ensure that a hoist used in a deep foundation
excavation, and all of the hoist’s cables, hooks and components, are
(a) designed and certified by a professional engineer;
(b) installed, used, maintained and dismantled in accordance with
the professional engineer’s specifications;
(c) inspected regularly to ensure that the hoist and its components
are in safe operating condition;
(d) of a sufficient height to safely raise a worker completely above
the ground surface; and
(e) equipped with a brake capable of supporting at least four times
the maximum load likely to be imposed on it.