Development of bridges

Bridges made from fallen trees

1300

https://en.wikipedia.org/wiki/Bridge

Plank bridges

1400

Planks between stones

1400

Flat slabs of stones over rivers

1500

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

Truss bridge

1570

https://en.wikipedia.org/wiki/Truss_bridge#:~:text=The%20Pratt%20truss%20was%20invented,moved%20from%20wood%20to%20metal.

Suspension bridge

1741

https://en.wikipedia.org/wiki/Suspension_bridge#:~:text=The%20first%20iron%20chain%20suspension,designed%20by%20inventor%20James%20Finley.

Big suspension bridge

1801

https://www.wonderopolis.org/wonder/how-does-a-suspension-bridge-work

First cantilever bridge

1867

https://howbridgeswork.weebly.com/cantilever-bridge.html