Strengthening Educational Infrastructure for a Growing Community
Interspan was engaged by Builder Roberts Co. to deliver the full post-tensioned slab package for the redevelopment of Carlingford West Public School and Cumberland High School—part of the NSW Government’s $3.9B investment into modernising Western Sydney education. Working alongside Consulting Engineers TTW, Interspan supported two upgraded campuses designed to meet the needs of rapidly growing student populations.
Supporting Modern Teaching Through Smarter Structural Solutions
The upgrades introduce contemporary, flexible spaces that enhance teaching capability and student engagement. Carlingford West Public School now features a new hall, library, multipurpose areas, and refurbished facilities that promote collaboration and adaptable learning. Cumberland High School benefits from new specialist spaces, including workshops, arts studios, and performance facilities—broadening learning opportunities and supporting future-focused programs.
Building Capacity for Growing Communities
With enrolments rising across Western Sydney, both schools required expanded and modernised infrastructure. The redevelopment significantly increases teaching capacity while improving circulation, amenities and usability across each campus.
Interspan delivered 19,500 m² of post‑tensioned slabs across six buildings, ensuring structural efficiency, program certainty and streamlined construction.
Engineering for Performance, Efficiency and Long-Term Value
Interspan’s D&C post‑tensioning solutions enabled long spans, open floor plates and efficient structural systems suited to education environments.
Benefits included reduced material quantities, enhanced construction speed, improved sustainability outcomes and dependable quality control—supporting Roberts Co and TTW in meeting the project’s demanding performance requirements.
A Collaborative Project Delivering Community Impact
Interspan acknowledges the collaboration with Roberts Co. and Consulting TTW, whose leadership and technical excellence supported the successful delivery of this important education project. Together, the team has helped create modern learning environments that will benefit students, teachers and the broader community for decades to come.
Interspan
Interspan uniquely integrates in-house post-tensioning expertise, advanced forensic diagnostics, and cutting-edge strengthening technologies to enable a single-source delivery model trusted by global developers for complex retrofit and reuse projects.
NEW STRUCTURES
The Interspan Group brings unique expertise in post-tensioning, construction methodology, and lifting operations that reduce CO₂ emissions, material usage, and construction program.
EXISTING STRUCTURES
We specialise in helping clients extend the lifespan of concrete structures through advanced repair, strengthening, and carbon-fibre solutions. Adaptive reuse projects are a perfect fit for our expertise, helping to minimise waste while delivering safe, modern outcomes that support community growth.
Over the last decade, the Interspan Group has become a market leader in the application of CFRP-strengthening solutions, with notable projects including the award-winning The Space House in London and the Quay Quarter Tower in Sydney.
Quality Assurance
Quality Assurance holds immense significance for Interspan because it impacts the safety of our operatives and future occupants, the long-term durability of our structures, and our client satisfaction and relationships.
Interspan is accredited under CARES APTO1 for the Production and Supply of Post-tensioning Anchorage Systems and is the only post-tension contractor in Australia accredited under CARES APTO4 for the supply and installation of Post-tensioning systems in concrete structures.
Sustainability
Post-tensioning and adaptive reuse are powerful design approaches that reduce material use and embodied carbon—delivering more efficient, resilient, and sustainable structures for the future.
Australia – NSW
United Kingdom & Ireland
