Three firms have been fined after an electrician suffered serious leg injuries when he became trapped under a prefabricated wall in Portsmouth.
Martin Cox, 28, from Hayling Island, was injured in the accident at the BAE Systems site in Broad Oak in 2008.
BAE Systems Properties, BS Interiors South and Emcor Facilities Services, of Cheshire, pleaded guilty to breaching work regulations.
The hearing took place at Portsmouth Crown Court earlier.
Principal contractor Emcor Facilities Services Ltd, of Birdhall Lane, Stockport, and the subcontractor, BS Interiors (South) Ltd, of Cardiff Road, Portsmouth, took the decision to put the 10.4m-long wall together on the floor of the site on 20 August 2008.
Seven workers, including Mr Cox, then attempted to lift the 1,136kg wall but when the lift was aborted, Mr Cox was trapped underneath, dislocating both ankles and fracturing his left foot.
He was confined to a wheelchair for a year after the accident and is still unable to work full-time.
BAE Systems, as the construction design and management co-ordinator, was fined £8,000 with costs of £6,110.
Emcor Facilities Services was fined £15,000 and ordered to pay costs of £6,110.
BS Interiors (South) was fined £1,500 with no costs.
The case was brought by the Health and Safety Executive.