ABOUT THIS TYPE OF BRIDGE
The Scherzer Bridges of North Wall Quay
Location: Spanning the entrances to George's Dock and Custom House Dock respectively, on North Wall Quay in the Dublin Docklands.
Design: Scherzer Rolling Lift Bridges, named after their inventor, American engineer William Donald Scherzer. Patented in 1893, their unique design makes them both visually striking and functionally effective.
Construction: Installed in 1911-1912 for the Dublin Port and Docks Board to replace an earlier drawbridge. Built with steelwork supplied by Spencer and Company of Melksham, Wiltshire.
How Scherzer Bridges Work
- Bascule Principle: Scherzer bridges are a type of bascule bridge, meaning they have a counterweighted section that lifts to allow passage.
- Rolling Lift: The unique element is how they lift. The bridge deck is built on a curved track with a "rocking chair" like base. To open, the deck rolls backward, simultaneously counterbalancing itself for a smooth lift.
- Advantages:
- Compact: Requires less space than traditional pivot-based bascule bridges.
- Stable: The rolling movement offers stability even in windy conditions.
ABOUT THIS TYPE OF BRIDGE