The 24 hour deadlift record by an individual is 475,065 kg (1,047,337 lb 12 oz) by Ian Atkinson at Thorn Cross Young Offenders Institution, Warrington, UK on 15-16 November 2002.
Ian is a prison officer at this YOI.
The previous record was:
The deadlift record by an individual is 455,677.5 kg (1,004,595 lb) by Steph Smit at Warren’s Health Club, Pietermaritzburg, South Africa on 13-14 September 1997.