| Name | Billwil Bridge, Switzerland |
|---|---|
| Who | |
| Owner | |
| Design | Robert Maillart |
| Contractor | |
| Where | Billwil, Saint Gallen, Switzerland |
| Latitude | N 47 27' 35" |
| Longitude | E 09 09' 49" |
| Why | Takes road over River Thur to village of Billwil |
| When | 1904 |
| Overall type | Arch with 3 hinges. This was Robert Maillart third bridge design - he was developing his idea of a three hinged arch. The closed spandrel makes the bridge appear to be a beam structure of variable depth. |
| Rise of arch | 4 m. |
| Main spans | 2 spans of 35 m. |
| Materials | Reinforced concrete |
| How to read a bridge | Read more about arches..... Read more about the book metaphor..... |
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