The heaviest object ever directly weighed was the Revolving Service Structure (RSS) of launch pad 39B at NASA's Kennedy Space Center, Florida, USA. The structure was lifted up on 21 jacking points which, between them, measured the mass of the RSS as 2,423 tonnes (5,342,000 lbs). The work was carried out by Industrial Steel Inc. (USA) and Buffalo Hydraulic (USA) on 23 January 2004.

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