WorkSafe has begun an investigation into the incident, which happened about 11.10pm last night.
It is understood slings attached to temporary holding points on the wheel have somehow detached, allowing the wheel to turn uncontrollably.
The cause of the incident remains unclear, however, WorkSafe visited the site after the incident as well as this morning and have launched an investigation into the matter.
A non-disturbance notice has been issued at the site, ceasing work until a safe system of work is in place.
Reports that the cause of the incident happened because of wind gusts was based on preliminary information given to WorkSafe immediately after the incident.
A comprehensive investigation into the matter will determine the cause of the incident.
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