Aberdeen Sheriff Court heard that on 21 September 2016, Joseph Kane, an employee of Henderson and Aitken Limited fell from the top rungs of a ladder when it slipped sideways on the scaffold.
Kane died of multiple injuries.
The scaffolding had been erected by Henderson and Aitken employees and the ladder was tied, using a blue nylon cord, to the scaffold ledger at only the left stile.
An HSE investigation estimated the lateral movement of the ladder due to the lack of fixings was approximately 20cm.
HSE found a Henderson and Aitken Limited employee had erected the scaffold even though he was not a qualified or competent scaffolder.
He had been asked to do this by the company director who was aware he was unqualified.
The director then allowed three people to access the scaffold which was not erected to the correct standard.
Henderson and Aitken Limited of Aberdeen pleaded guilty to breaching safety regulations and was fined £53,000.
Speaking after the hearing HSE Principal Inspector Niall Miller said: “Falls from height remain one of the most common causes of work-related fatalities in this country and the risks associated with working at height are well known.
“This tragic and preventable death highlights the need for those undertaking work at height to ensure that it is carried out safely, that industry guidance is followed and that the relevant regulations are complied with.
“It is vitally important that those planning and arranging for such work give sufficient regard to the risks posed to workers and members of the public through their actions.”