Isoisänsilta Isoisänsilta /Farfarsbron | |
|---|---|
 Isoisänsilta viewed from the Kalasatama (mainland) end | |
| Coordinates | 60°10′56″N24°58′57″E / 60.182167°N 24.982556°E /60.182167; 24.982556 |
| Carries | Pedestrians, bicycles |
| Crosses | Sompasaarensalmi |
| Locale | East Helsinki |
| Begins | Kalasatama |
| Ends | Mustikkamaa |
| Named for | Isoisänniemi, Mustikkamaa |
| Characteristics | |
| Design | Cantilever, withorthotropic deck |
| Material | Steel |
| Total length | c. 170 metres (560 ft) |
| Width | 4 metres (13 ft) (minimum) |
| Longest span | 144 metres (472 ft) |
| Clearance below | 6.7 metres (22 ft) |
| History | |
| Designer | Pontek |
| Construction start | August 2014 |
| Opening | June 2016 |
| Location | |
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Isoisänsilta (Swedish:Farfarsbron) is apedestrian and cycling bridge inHelsinki,Finland, opened in June 2016.[1]
The bridge connects theKalasatama neighbourhood on the Helsinki mainland to the island ofMustikkamaa and, via it, to the islands ofKorkeasaari andKulosaari.[1]
The total length of the bridge isc. 170 metres (560 ft),[1] including the 144 metres (472 ft) main span. The minimum width of thedeck is 4 metres (13 ft),[1] which at the Kalasatama end widens and splits into two lanes separated by the central bridge arch. Conversely, at the Mustikkamaa end, the arch splits into two supports on either side of the central bridge deck.[2]
The bridge was designed by the civil engineering firm Pontek,[3] and is based on their winning entry, titledTiikerihai ("Tiger Shark"), into the design contest held by the City of Helsinki in 2011.[1] Construction began in 2014 and was completed in 2016, with the bridge opening to traffic on 1 June 2016.[1]
The bridge is named after the Isoisänniemipromontory of Mustikkamaa, and its name literally translates as "Grandfather's Bridge".[4][1]
Some locals have taken to climbing on top of the bridge arch, in a number cases jumping off into the sea approximately 14 metres (46 ft) below, which the police and rescue service strongly advice against as dangerous.[5][6]
In 2017, the Finnish Association of Civil Engineers chose Isoisänsilta as the 'Bridge of the Year'.[7]
