FACTS & FIGURES
Length: 369 metres.
Original construction of present bridge cost GPB 112,500.
Fourteen spans make up the bridge, Australian Ironbark timber is used on 12 spans, while the two central swingspans are constructed from steel.
The base weighs 6,800 tonnes, is 13 metres in diameter and 19 metres deep with 10 metres lying below the harbour floor.
The swingspan weighs 1,000 tonnes. It is supported on a base made from concrete and yellow block sandstone that was sourced from Pyrmont.
It takes approximately 60 seconds to open.
It opens fully to 83 degrees.
It is driven by the original two 50Hp 600V DC General Electric type 57 electric motors.
Manual drum-type General Electric tramway controllers are used to drive the motors.
Power was originally drawn from Ultimo Power House (now Powerhouse Museum).
Bridge openings are required for vessels seven to 14 metres in height. For taller ships, but only on special occasions, the Monorail beam is opened with the bridge.