According to each jurisdiction’s OHS law, a worker must use fall protection when working:
FEDERAL: a) From an unguarded structure or on a vehicle at a height of more than 2.4 m above the nearest permanent safe level; b) from a temporary structure at a height of more than 6 m above a permanent safe level; or c) from a ladder at a height of more than 2.4 m above the nearest permanent safe level where, because of the nature of the work, the worker is unable to use at least one hand to hold onto the ladder [Canada OHS Regs., Sec. 12.10(1)].
ALBERTA: From a portable ladder from which the worker may fall 3 m or more [OHS Code 2006, Sec. 137(1)]. From a temporary or permanent work area if the worker may fall 3 m or more or there’s an unusual possibility of injury if the worker falls less than 3 m [Sec. 139(1)].
BRITISH COLUMBIA: At a place: a) from which a fall of 3 m (10 ft) or more may occur; or b) where a fall from a height of less than 3 m involves a risk of injury greater than the risk of injury from the impact on a flat surface [OHS Regs., Sec. 11.2(1)].
MANITOBA: Where there’s a risk of a worker falling: a) a vertical distance of 3 m or more; b) a vertical distance of less than 3 m where there is an increased risk of injury due to the surface or item on which the worker might land; or c) a vertical distance of more than 1.2 m from an area used as a path for a wheelbarrow or similar equipment [Workplace Safety & Health Regs., Sec. 14.1(1)(a), (b) and (g)]. In a mine and at risk of falling 1.5 metres or more [Operation of Mines Regs., Sec. 29(6)(b)].
NEW BRUNSWICK: From: a) more than 3 m above the nearest safe level; b) a work platform that is more than 3 m above a permanent safe level and from which the worker may fall if the work platform tips or fails; or c) a communication or power transmission tower or other similar structure that’s over 3 m in height [OHS Regs., Sec. 49(1)(a)(i), (b) and (c)].
NEWFOUNDLAND/LABRADOR: At elevations greater than 3.05 m above grade or floor level [OHS Regs., Sec. 60(1)].
NORTHWEST TERRITORIES/NUNAVUT: At an elevation 3 m (10 ft) or more above grade or floor level [General Safety Regs., Sec. 57(1)(a)].
NOVA SCOTIA: From a work area that’s 3 m or more above the nearest safe surface or water [Fall Protection & Scaffolding Regs., Sec. 7(1)(a)].
ONTARIO: Where the worker is exposed to the hazard of: a) falling more than 3 m; or b) falling more than 1.2 m, if the work area is used as a path for a wheelbarrow or similar equipment [Construction Projects Regs., Sec. 26(1) and (2)]. Where the worker is exposed to the hazard of falling to a surface that’s more than 3 m below the position where he’s situated [Industrial Establishments Regs., Sec. 85]. Where the worker is exposed to the hazard of falling more than 3 m [Mines & Mining Projects Regs., Sec. 14(1)].
PRINCE EDWARD ISLAND: Where the worker is exposed to the hazard of falling from a work area that’s 3 m or more above the nearest safe surface or water [Fall Protection Regs., Sec. 2(1)(a)].
QUÉBEC: When exposed to falls of over 3 m from the work station [Regulation respecting occupational health and safety, Sec. 346]. In construction, when using a wheelbarrow or vehicle and exposed to falls of 1.2 m or more [Safety Code for Const. Industry, Sec. 2.9.1(1)(d)].
SASKATCHEWAN: At a temporary or permanent work area where: a) the worker may fall 3 m or more; or b) there’s the possibility of injury if the worker falls less than 3 m [OHS Regs., Sec.116(2)].
YUKON: At a place from which a fall of: a) 3 m (10 ft) or more may occur; or b) less than 3 m (10 ft), if it involves an unusual risk of injury [OHS Regs., Sec. 1.37(a)].