Project Description

Post-tensioning for Sydney’s new Surf Park

URBNSURF Sydney is located within the heart of the Sydney Olympic Park precinct and incorporates a 16,000m2 surf lagoon holding 26 million litres of water. The lagoon can create both left and right-hand breaks with waves surfable by beginners as well as pro surfers honing their skills.

Overlooking the lagoon is a multi-storey purpose-built facility split over three levels. The building is home to some amazing spaces such as the Surfing Academy, where beginners can learn to surf, the Fitness & Wellness Centre, a licensed restaurant and rooftop bar, a café, a hire and merchandise area, a kids’ play area and a splash pool. There is also a leisure pool with a heated hot tub.

Post-tensioned slabs for Lipman

Interspan were entrusted by Lipman with the design and construction of 1,430 square meters of post-tensioned slab comprising the first floor

The post-tensioned slabs were designed using in-house design expertise, industry best practices, and market-leading software in RAM Concept.

As UrbnSurf Homebush opens its doors to over 1,000 daily visitors, Interspan’s contributions stand as a testament to market-leading quality as the only CARES-accredited supplier and installer of post-tension systems in concrete structures.

The surf park promises to elevate Sydney’s recreational landscape and establish a new standard for urban leisure facilities.

Take a look at Lipman’s completion video featuring Project Manager Aaron Curtin and URBNSURF CEO Damon Tudor.


At Interspan, we firmly believe in fostering collaborative relationships with our clients
to identify and implement optimal solutions for their specific needs and projects. Our approach revolves around customer-centricity, emphasizing partnership, innovation, and excellence. As a result, we have established ourselves as a trusted and dependable partner for businesses worldwide.


  • Increased clear spans
  • Thinner slabs
  • Lighter structures; reduced floor dead loads
  • Reduced cracking and deflection
  • Reduced storey height
  • Rapid construction
  • Large reduction in conventional reinforcement
  • Higher degree of crack control