Head of WorkSafe's general inspectorate Jo Pugh said the company's disregard for the safety of workers using scaffolding was alarming.
"This was a seriously dodgy set up and it is not the way to do scaffolding. If scaffolding is not maintained and not set up properly, then your workers are walking on a tightrope of risk," Pugh said.
Dong Xing had previously been issued with one infringement notice, eight prohibition notices, and nine improvement notices for health and safety matters on building sites between December 2011 and 12 August 2016.
"This is a company that had been warned, repeatedly, and continued to flout the law," Pugh said.
"It is a reminder to everyone providing scaffolding to ensure their systems are up to scratch and their equipment maintained and fit for purpose."
Dong Xing Group Ltd was imposed a fine of $180,000 and costs of $2333.40 were ordered.
Training orders were also made requiring the defendant to arrange for five workers to undertake a low-level scaffolding course.