摘要: |
It is only very recently that Germany's historic wooden covered bridges have been extensively catalogued and basic information about age, size and type of construction collected and analysed.There are 69 known such bridges still surviving in their original condition and at their original site.Over half of these bridges were built before the middle of the 19th Century, in other words they were built before industrialisation and its methods and before modern engineering with its structural analysis that changed the way bridges were conceived and constructed. |