Neville Wightman, 52, died after he was crushed when a section of pontoon tipped off the back of a lorry driven by Paul Napier from Essex.
Speaking after the verdict Health and Safety Executive Inspector Antonina Drury said:
“This tragic incident could easily have been avoided had Paul Napier followed the basic rules of undertaking a safe lifting operation.
“Had he ensured the right equipment was properly deployed, and had he kept everyone safely clear of the lifting zone, then Mr Wightman would still be alive.
“This case demonstrates all too graphically what can go wrong, and why extreme care must be taken all times during the planning, management and execution of such operations.”
More top news
The mother of a keeper killed by a tiger at a zoo in Cambridgeshire says her daughter loved the job and "wouldn't have done anything else".
A political researcher from the University of East Anglia this election could spell the end of UKIP as a political force.
Cloudy, humid at first, with thundery showers dying out.