Last week saw a giant 157m long, 22m wide, 1,500-tonne machine bridge building machine begin work on Mersey Gateway Bridge.

Described as looking like a giant Meccano structure, Trinity is a movable scaffolding system that will attach to the bridge piers and enable the elevated approach viaducts to be built over the Mersey estuary.

In the wake of such an impressive machine roaring into existence, we wanted to share with you 5 other examples of extraordinary equipment. Watch the video below to see them in action!