In construction and industrial settings, if there is a foreseeable danger of injury to a worker's head at a work site, the employer must ensure that the worker wears protective headwear that is appropriate to the hazards.

If there is a significant possibility of lateral impact to the head, the protective headwear must meet the requirements of:

• CSA Standard Z94.1-15, Industrial protective headwear - Performance, selection, care and use
• ANSI Standard Z89.1-2003, American National Standard for Industrial Head Protection, for Type II helmets
• CEN Standard EN 12492: 2000, Mountaineering equipment - Helmets for mountaineers - Safety requirements and test methods, if the manufacturer's specifications allow the helmet to be used for industrial work at height
• UIAA Standard 106: 2004, Mountaineering and Climbing Equipment - Helmets, if the manufacturer's specifications allow the helmet to be used for industrial work at height

If the possibility of lateral impact to the worker's head is unlikely, protective headwear must meet the requirements of:

• CSA Standard Z94.1-15, Industrial protective headwear - Performance, selection, care and use
• ANSI Standard Z89.1-2003, American National Standard for Industrial Head Protection, for Type I or Type II helmets
• CEN Standard EN 397: 2006, Specification for industrial safety helmets
• CEN Standard EN 12492: 2000, Mountaineering equipment - Helmets for mountaineers - Safety requirements and test methods, if the manufacturer's specifications allow the helmet to be used for industrial work at height
• UIAA Standard 106: 2004, Mountaineering and Climbing Equipment - Helmets, if the manufacturer's specifications allow the helmet to be used for industrial work at height

The protective headwear must be equipped with a retention system having at least 3 separate points of attachment to the helmet shell, and includes a chin strap. The worker must secure the protective headwear according to the manufacturer's specifications.