Definition(s)
Wall Opening
“Wall opening” means an opening at least 750 mm high and 300 mm wide in a wall, partition, or bulkhead.
Source: Nova Scotia Offshore Petroleum Occupational Health & Safety Requirements, Canada-Nova Scotia Offshore Petroleum Board, Canada, December 2000. Regulations
Source: Oil and Gas Occupational Safety and Health Regulations, SOR/87-612, Canada, current to April 29, 2013. Regulations