Oil and Gas Occupational Safety and Health Regulations (SOR/87-612)

15.9 (1) Materials handling equipment that is regularly used outdoors shall be fitted with a roof or other structure that will protect the operator from exposure to any environmental condition that is likely to be hazardous to his safety or health.

(2) Where heat produced by materials handling equipment is capable of raising the temperature in any area occupied by an employee on the equipment to 27°C or more, the area shall be protected from the heat by an insulated barrier.