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The Sydney Harbour Bridge weighs 52,800 tonnes. The arch alone weighs 39,000 tonnes. Interestingly, all the weight of the bridge is borne on only four bearing pins, each only 37 centimetres in diameter, yet each weighing over 300 tonnes.
378 tonnes
Tiger 1 Ausf.E - 56.9 metric tonnes approx. Tiger 2 Ausf.B - 68.9 metric tonnes approx. weight varied depending on modifications
about 2.5 tonnes although some of the largest blocks used on the Great Pyramid of king Khufu weighed up to 70 tonnes
Almost 2 tonnes