Hundreds of workers have walked off Brisbane’s Queen’s Wharf $3.6 billion dollar redevelopment site due to asbestos concerns.

Plasterboard supplier company USG Boral sent a letter to customers, including Queens Wharf developers, warning of “very low asbestos contamination” found in the company’s Sydney plant.

 Multiplex, the construction company managing the site, says testing has found no traces of asbestos yet at the Brisbane redevelopment.

The Construction, Forestry, Maritime, Mining and Energy Union, which represents the workers, says it is impossible to know at this stage how many other sites could be affected, but the affected plasterboards  were widely used.