The wholly owned Leighton Holdings subsidiary said it will undertake structural, mechanical and piping (SMP) projects as part of the mining giant’s iron ore expansion.

Rio Tinto plans to expand its iron ore mining capacity in Pilbara to 353 million tonnes per annum by 2015, in a phase-wise manner.

Leighton said the framework agreements will deliver the earthworks contracts for the eastern stream of Rio Tinto’s expansion, which covers the Hope Downs 4 mine, Marandoo mine, Yandicoogina mine and Koodaideri mine.

Additionally, the framework agreements includes SMP work in the western stream of Rio Tinto’s expansion, which covers Brockman 4 mine phase two, Western Turner Syncline mine, Brockman 4 mine phase three and Nammuldi mine.