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Introduction
Mitchell Fwy Burns Beach Rd to Hester Avenue
This project involved the meticulous design, fabrication, and commissioning of a new prestress bed facility to support the Mitchell Freeway extension. It required the production of 54 Tee-Roff beams, each with an average weight of 90 tonnes, and the construction of four bridges. To meet the demanding construction schedule, daily casting was carried out. The project featured complex beam connection details to achieve continuous spans, with beam installations completed overnight to minimise disruptions to the public rail system.
Project Overview
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Client
CPB Contractors
Location
Mitchell Fwy
Duration
2016
Cost
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Project Specifications
- 54 Tee-Roff Beams (each with an average weight of 90 tonnes)
- 4 bridges
Project Details
- Designed, fabricated, and commissioned a new prestress bed facility
- Conducted daily casting to meet a demanding construction schedule
- Engineered complex beam-end connections to create continuous spans
- Installed beams overnight to accommodate public rail system shutdowns
- Achieved Class 2 surface finish for all elements
- Managed delivery of oversized beams, including police escort for exceptionally wide units
- Provided detailed joint arrangements to prevent leaks at in-situ connections
- Stored up to 25 beams on-site for just-in-time delivery
- Utilised S50 concrete with stringent specifications, achieving overnight strengths of 40 MPa
Introduction
Gateway WA
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.
Project Overview
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Client
Main Roads WA
Location
WA Perth Airport
Duration
2013 – 2014
Cost
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Project Specifications
- 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
Project Details
- 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
Testimonials
Our collaborative efforts have contributed to the success of significant projects, including major infrastructure initiatives such as the New Perth Stadium and the Gateway WA project.