Permacast supplied a range of specialised precast and prestressed concrete components for the Gateway WA project, enhancing the strength, durability, and safety of the infrastructure. The scope included prestressed concrete bridge planks, gas protection trench units, wing beams and planks for the Horrie Miller Overpass, fascia panels, precast column formwork, and bridge parapet panels. Each element was engineered to meet stringent structural and durability requirements, contributing to the resilience and longevity of the bridges and associated structures. Through precision manufacturing and careful coordination, Permacast’s products played a key role in delivering one of Western Australia’s landmark transport projects.

Main Roads WA

WA Perth Airport

2013 – 2014

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• 228 prestressed bridge planks ranging from 15 to 24 meters in length
• 54 L-shaped protection walls and cover units
• 4 post-tensioned wing beams, each weighing 110 tonnes
• 578 precast parapet panels

• Wing beams were highly complex, requiring 3D modelling of reinforcement to ensure accuracy during fabrication
• Parapet panels featured intricate shapes with minimal repetition, necessitating advanced steel moulding techniques
• Storage was carefully managed to support just-in-time delivery
• All products were finished to Class 2 standards to meet stringent project requirements
• Single-pour construction methods were used, eliminating joints and potential leaks
• Added value through post-tensioning of wing beams
• Close collaboration with the client enabled resolution of design changes and improved construction efficiencies
• Numerous cast-in items were incorporated to facilitate onsite connections