Hi Joey

In the Nova Scotia Occupational Safety General Regulations the minimum aisle width is spelled out as the widest part of the lift truck or load plus 600mm (24") in a one way aisle and 900mm (36") plus the width of two lift trucks or loads if wider than the truck for a two way aisle.
You may want to check in your provincial regulations, most can be accessed on line. For most provinces you can call up the Queens Printers website and do some navigating or searches and you will come up with a digital copy of your provincial regulations.
Good Luck with your safety quest.