Testing New Road Grader - Believed to be the biggest road grader to be built in Australia, and the first post war model produced by British standard Machinery Company, Pty Ltd. This hi-lift auto patrol grader was tested to-day. in Hornsby Shire. It weighs 24,000 lbs, and has all hydraulic controls. The Grader at work in Baldwin Ave, Asquith. February 25, 1947. (Photo by Ronald Leslie Stewart/Fairfax Media).