ASP Access Floors supplied and installed an airtight access floor system with smoke and zone baffling at ANZ’s global head office in Melbourne. ASP’s steel cementitious airtight system with a 4.5kN loading was used in this project.

Located at 833 Collins Street, Melbourne, ANZ Centre is one of the world’s greenest bank buildings. A 14-storey, low-rise ground scraper, the building features a dynamic central atrium space and fully-connected floor plan.

Due to the design of the mechanical units, the specification required each zone to be tested to comply with a controlled air leakage rate of 0.7277l/s.m² without floor coverings.

A controlled leakage rate was achieved by testing each zone to comply with an air leakage rate of 0.7277l/s.m² without floor coverings; and 0.1386l/s.m² with floor coverings.

The large floor plate spanning an area of over 10,000m² would have proved to be a challenge in terms of expansion and creep, if it weren’t for ASP’s specially designed and patented pedestal head and panel. The panel has a special expansion cut-out, and the pedestal head is fitted with an expansion gasket designed to keep the panels separated by 0.3mm at all times. This prevents the panels from clicking or rubbing up against each other during expansion.

The use of bridging stringers for services minimised penetrations in the ductwork. ASP staff coordinated with other services to ensure the penetrations were correctly located and properly sealed.