Development of bridges By c y a n y e a h 1300 Bridges made from fallen trees https://en.wikipedia.org/wiki/Bridge 1400 Plank bridges 1400 Planks between stones 1500 Flat slabs of stones over rivers https://slate.com/human-interest/2016/08/england-s-tarr-steps-is-an-ancient-bridge-of-stone-slabs-said-to-have-been-created-by-the-devil.html 1570 Truss bridge https://en.wikipedia.org/wiki/Truss_bridge#:~:text=The%20Pratt%20truss%20was%20invented,moved%20from%20wood%20to%20metal. 1741 Suspension bridge https://en.wikipedia.org/wiki/Suspension_bridge#:~:text=The%20first%20iron%20chain%20suspension,designed%20by%20inventor%20James%20Finley. 1801 Big suspension bridge https://www.wonderopolis.org/wonder/how-does-a-suspension-bridge-work 1867 First cantilever bridge https://howbridgeswork.weebly.com/cantilever-bridge.html
