The collapsed crane at the Kings Dock Mill site.
The Health and Safety Executive (HSE) prosecuted the site's principal contractor, Bowmer and Kirkland Ltd, and structural engineering company Bingham Davis Ltd following an investigation into the incident.
Liverpool Crown Court heard the crane fell onto a partially constructed apartment block, across a road and came to rest on the Chandlers Wharf apartments. Eight counterweights on the crane, weighing a total of 56 tonnes, broke free and crashed through the roof and six floors of the building.
Crane driver Iain Gillham, 55, from Woolton, fell from his cab onto the roof of the apartments and through the hole created by the counterweights. He suffered multiple injuries including a brain haemorrhage, fractured skull, broken right shoulder, broken ribs, crush injuries to his left side, and major spinal injuries which resulted in his legs being paralysed.
No one inside the building was injured but residents had to be evacuated from the 64 apartments, and some were rescued from their balconies. The damage to the building was extensive and residents were unable to return to their homes for nearly two years while major reconstruction work took place. The HSE investigation into the incident found that the crane's foundation could not cope with the forces generated by the crane.
Both companies were found guilty of breaches of the Health and Safety at Work etc Act 1974 following a trial at Liverpool Crown Court by failing to ensure the safety of workers or residents.
Bowmer and Kirkland Ltd, of Church Street in Heage, Derbyshire, was fined £280,000. A decision on prosecution costs will be made separately.