Leonardo Bridge
In 1502 Leonardo da Vinci did a simple drawing of a graceful bridge with a single span of 720-foot span [approximately 240-meters]. Da Vinci designed the bridge as part of a civil engineering project for Sultan Bajazet II of Constantinople [Istanbul]. The bridge was to span the Golden Horn, an inlet at the mouth of the Bosphorus River in what is now Turkey. The Bridge was never built.
Leonardo's Golden Horn Bridge is a perfect pressed-bow. Leonardo surmised correctly that the classic keystone arch could be stretched narrow and substantially widened without losing integrity by using a flared foothold, or pier, and the terrain to anchor each end of the span. It was conceived 300 years prior to its engineering principals being generally accepted. It was to be 72 feet-wide [24 meters], 1080-foot total length [360 meters] and 120 feet [40 meters] above the sea level at the highest point of the span.
Norwegian painter and public art creator, Vebjorn Sand, saw the drawing and a model of the bridge in an exhibition on da Vinci's architectural and engineering designs in 1996. The power of the simple design overwhelmed him. He conceived of a project to bring its eternal beauty to life. The Norwegian Leonardo Bridge Project makes history as the first of Leonardo's civil engineering designs to be constructed for public use.
Rolling Bridge
Heatherwick Studio's Rolling Bridge is located within a new residential, office and retail quarter set around part of the Grand Union Canal.
Rather than a conventional opening bridge mechanism, consisting of a single rigid element that lifts to let boats pass, the Rolling Bridge gets out of the way by curling up until its two ends touch. While in its horizontal position, the bridge is a normal, inconspicuous steel and timber footbridge; fully open, it forms a circle on one bank of the water that bears little resemblance to its former self.
Twelve metres long, the bridge is made in eight steel and timber sections, and is made to curl by hydraulic rams set into the handrail between each section. The Rolling Bridge, un diseño roscable en acero irresistible [Thomas Heatherwick / Heatherwick Studio]. The Rolling Bridge opens every Friday at noon and won the 2005 British Structural Steel Award. Please note that on the rare occasion that wind speeds reach 30mph in the basin, the bridge will not open.
Henderson Wave Bridge
At 36 metres above Henderson Road, Henderson Waves is the highest pedestrian bridge in Singapore. It was built to connect the two hills of Mount Faber and Telok Blangah Hill. This bridge is a part of Southern Ridges, a 9 km chain of greenery, in which consist primarily of three large hill parks - Mount Faber, Telok Blangah Hill Park and Kent Ridge Park.