WorkSafe ACT is investigating an incident at a high rise residential construction site in Braddon on Wednesday evening.
The safety watchdog said an inspector attended the site at about 5pm following a report of a collapse of prefabricated concrete panels in a lift shaft. One of the panels fell approximately 7 metres into the shaft well.
No one was in the shaft at the time of the collapse and no one was injured.
WorkSafe ACT is investigating the cause of the collapse and has engaged an independent engineer as part of this investigation.
The safety watchdog said it will provide safety advice to industry both in the ACT and nationally, noting the significance of the incident.