One of Main Roads Western Australia’s most complex and multi-disciplinary infrastructure undertakings, the Swan River Crossings project is replacing the ageing Fremantle Traffic Bridge with Australia’s first extradosed bridge, combining cantilever and cable-supported elements to create a distinctive landmark gateway into Fremantle. Permacast is delivering a significant portion of the precast works, including the transverse tee-roff beams and the architectural parapet units. This work involves the management of complex geometries, stringent tolerances, architectural finish requirements, and highly coordinated lifting and handling systems to meet the project’s demanding engineering and aesthetic standards.

Fremantle Bridge Alliance (FBA)

Fremantle

Ongoing (EDC 2026)

Rail

When the project is complete, Permacast will have:

• Produced 1,260m³ high-performance 65MPa concrete
• Manufactured 48 transverse tee-roff beams to tight dimensional tolerances
• Delivered 8 beams weighing 100 tonnes at 2.3–2.6m high
• Delivered 38 beams weighing 70 tonnes at 1.5–1.8m high
• Delivered 579 tonnes of parapets, incorporating 193 m³ of concrete and 39 tonnes of reinforcement
• Installed 360 tonnes of reinforcement steel

When the project is complete, Permacast will have:

• Achieved ±3 mm tolerances for stitching ducts and cast-in anchors.
• Implemented controlled steam curing for all beam elements.
• Managed complex mirrored east/west parapet geometries using adaptable mould systems.
• Conducted extensive trial-cast program to achieve high architectural finishes.
• Developed custom lifting brackets and engineered lift plans for safe handling, rotation, and installation.