Lion Steel Ltd has been sentenced to a fine of £480,000 for the corporate manslaughter of 45-year-old Steven Berry.
Steven Berry fell through a fragile roof panel and tragically died as a result of injuries sustained in falling 12m on 29 May 2008.
Mr Berry worked as a maintenance worker at the company, in Johnsonbrook Road, which produces steel cabinets and shelving.
Greater Manchester Police, which carried out a joint investigation with the Health and Safety Executive (HSE), said Mr Berry fell through a perspex sheet in a roof he was trying to fix and landed on a stone floor.
The investigation found that Lion Steel never offered health and safety training to Mr Berry and it also emerged that considerable sections of the roof were fragile.
No risk assessment was made to any employee working on the roof, the investigation found.
The court ordered Lion Steel to pay the fine in four annual instalments by September 2015, – £100,000 by September 2012; £150,000 by the following September; £150,000 by September 2014; and £80,000 by September 2015.
They were also ordered the company to pay prosecution costs of £84,000 within two years.