• As early as 1840s there was an efficient ferry service across the harbour. Before the opening of the bridge it carried about 40000 people each day. This explains why it took so long to get a bridge project approved.
• John Bradfield was the engineer who designed it.
• The arch of the bridge is 134 metres above the sea level.
• The length of the arch span is 503 metres. The bridge is 49 metres wide.
• The Sydney Harbour Bridge pylon is 89 metres above the sea level.
• The steel expands with heat up to 180 mm in height.
• The span, width and load bearing capacity make it the greatest bridge in the world, even if it is the third longest.
• Originally the Sydney Harbour Bridge had 6 vehicles lanes, 2 train lanes and 2 tram lanes, a footway, a cycleway.
• Now it has 7 vehicle lanes, 2 train lanes, one bus lane, a footway, a cycleway.
• White cats lived in the Sydney Harbour Bridge pylon between 1948 - 1971 as part of the "All Australian Exhibition".
• Francis Edward de Groot, a member of the right wing paramilitary party slashed the opening ribbon before the official opening of this Australian icon.
• Approximately 6000000 rivets were used in construction.
• One coat of paint requires approximately 30000 litres of paint.
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