Some of the equipment is quite large and is shipped in pieces on mafi trailers usually on roll on roll off (RoRo) vessels², following unloaded at the Port of Brisbane the parts are transferred from the mafi trailers onto multiple axle low deck trailers for delivery to the mine site where all the pieces are assembled.

The photos below are of a used Terex RH 120 ³ excavator main boom section prior to shipping overseas.

https://www.portbris.com.au

http://www.marineinsight.com/types-of-ships/what-are-ro-ro-ships/