Various kinds of machines are used during construction. The main reason why heavy machinery is used is that materials with huge weights need to be lifted and transported. One of the major brands of equipment which is used in Australia is John Deere. This company has both excavators as well as harvesters. Tractors are also part of the heavy equipment, being used in several farms. Take a look at this video to see how the excavators are being used. Combines have taken away much of the work of harvesting away from tractors, but these tractors are still being heavily used in many modern farms.