The BORR construction team have been hard at work on the Mega-Bridge. With over 80 precent of the columns and all 45 piles completed, this mega-impressive structure is beginning to take shape!

There’s nothing small about this section of the project with 33 columns in total needing to be installed across 11 piers to support 60 tee-roff bridge beams.

Where are we at now? The 27th column is in place at the ninth pier and the first precast concrete headstock shell now installed.

Are all these references to piles, columns, headstock shells and beams giving your head shell shock?

Think of it like this:

• Piles - These are structures that are drilled and concreted almost 30-metres deep into the ground to ensure the weight of the bridge can be supported safely.
• Columns - These are installed vertically on top to directly support the bridge itself and to make sure that the structure is clear in height over the roads.
• Headstock shells – These are cross-supporting structures that are placed on the top part of the bridge’s piers to support the tee-roff beams and the bridge superstructure.
• Tee-Roff beams – These unique beams span across the freight rail line and have been manufactured in the purpose-built facility for the project in Picton East.

All this size and scale is necessary because, once completed, the Mega-Bridge will end up running over Golding Crescent and Boyanup-Bicton Road, as well as the rail line used for freight and the Ferguson River.

“The Mega-Bridge is a complex and significant element of infrastructure for the new Bunbury Outer Ring Road,” said Jackson Lingwood, the Construction Manager for Structures and Bridges. “Our construction milestones achievement to date is very exciting for everyone who has contributed.”



The Mega-Bridge may look all mega and no bridge, but construction is well on the way!