Workplace Health and Safety Queensland has laid charges against three companies and an executive officer following an investigation into the deaths of two Gold Coast workers last year.

The workers were fatally injured on June 21, 2008, when the swing stage scaffold they were using to carry out concrete patchwork on the Pegasus high-rise at Broadbeach failed and fell 26 levels to the ground.

The charges allege various breaches of the Workplace Heath and Safety Act 1995 for failing to ensure the health and safety of the workers. Allscaff Systems, which erected the swing stage, is charged with failing to ensure the company complied with its obligations under the Act. Karimbla Construction Services, which built the high-rise, is also charged with breaching its obligation to ensure workplace health and safety.