Wagners precast concrete fast facts:
Six concrete segments are used to create one tunnel ring
4,157 tunnel rings are required to line both tunnels
25,000 segments will be produced at Wacol
Each segment is 27 centimetres thick and 1.7 metres long
One truck can only carry six segments at a time
Once in production, the facility will produce 140 segments per day
More than 105,000 cubic metres of concrete will be used to create the segments
