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Based on the design of the Berendrecht Lock, it has the same length and width, but with an operational depth (TAW) of 17.8 metres (58 ft), which makes it the world's largest lock. To construct the lock, 9.1 million m 3 of earth was excavated, and 22,000 tonnes of structural steel, three times the amount required to build the Eiffel Tower .
Vessels passing from the freshwater Lakes Washington and Union to Puget Sound enter the lock chamber through the open upper gates (A in the accompanying diagram). The lower gates (B) and the draining valve (D) are closed. The vessel is assisted by the lockwall attendants who assure it is tied down and ready for the chamber to be drained.
The west gate of the lock The east gate of the lock. Kings Norton Stop Lock (grid reference) is a Grade II* listed building at Kings Norton Junction on the Stratford-upon-Avon Canal near its junction with the Worcester and Birmingham Canal. It is the only guillotine-gated stop-lock on a canal. [1]
The caisson lock is a type of canal lock in which a narrowboat is floated into a sealed watertight box and raised or lowered between two different canal water levels. It was invented in the late 18th century as a solution to the problem posed by the excessive demand for water when conventional locks were used to raise and lower canal boats ...
The first known example of a tumbler lock was found in the ruins of the Palace of Khorsabad built by king Sargon II (721–705 BC.) in Iraq. [1] Basic principles of the pin tumbler lock may date as far back as 2000 BC in Egypt; the lock consisted of a wooden post affixed to the door and a horizontal bolt that slid into the post.
A plan and side view of a generic, empty canal lock. A lock chamber separated from the rest of the canal by an upper pair and a lower pair of mitre gates.The gates in each pair close against each other at an 18° angle to approximate an arch against the water pressure on the "upstream" side of the gates when the water level on the "downstream" side is lower.
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