The 32kg beam hit a 38-year-old man while he was on a third-storey access platform, breaking six ribs and fracturing three vertebrae. The self-employed sub-contractor was in hospital for a week and unable to work for two months.
He was working on the construction of the seven-storey South Place Hotel in Wilson Street, EC2, when the incident happened on 5 October 2011.
McClaren Construction Ltd of Brentwood, Essex, was the principal contractor and John Doyle Construction Ltd, of Welwyn Garden City, which is now in liquidation, was a sub-contractor.
The Health and Safety Executive (HSE) prosecuted both companies for safety breaches and both were sentenced at Southwark Crown Court on 10 December.
The court was told that several John Doyle workers were dismantling the temporary structural framework on the sixth floor of the building when they lost control of the six-metre beam. It fell down the side of the building and hit the worker and then landed in Wilson Street, a busy public highway on one side of the site.
HSE found that John Doyle Construction failed to identify and implement reasonable control measures that should have been in place to prevent any beam from falling in that way. McClaren Construction approved their sub-contractor’s work method statement and also did not identify that controls were lacking.
In addition, neither company took any steps to make sure that no one was working below the areas where the framework structure was being dismantled.
McClaren Construction Ltd, of Kings Road, Brentwood, Essex, was fined £22,500 with £14,854 in costs after admitting a breaching the Health and Safety at Work etc Act 1974.
John Doyle Construction Ltd, registered with administrators at Temple Quay, Bristol, was fined a nominal £1 with no order for costs after being found guilty of a breach of the same act.
HSE inspector Eileen Gascoigne said: “What happened at the building site that day had the potential to kill one or more workers and members of the public passing close by. It was entirely good fortune that the consequences were not even graver.
“The incident was entirely preventable. The risks were foreseeable and the measures that needed to be in place are well-known in the industry and were readily implemented afterwards.
“As an experienced principal contractor, McClaren failed to properly check the controls that John Doyle proposed for the work, and failed to implement their own procedures for ensuring there was no risk to either other contractors, or members of the public, from the work taking place.
“John Doyle was also an experienced contractor and yet it too failed on an important safety issue.”