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Published on December 5, 2021 2:10:24 AM ● Video Link: https://www.youtube.com/watch?v=3eH4Gg93fCU

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Bridge, by Wikipedia https://en.wikipedia.org/wiki?curid=3397 / CC BY SA 3.0

#Bridges
#Infrastructure
#Structural_engineering
The Orwell Bridge in Ipswich, Suffolk, England Underneath the Fort Pitt Bridge in Pittsburgh, Pennsylvania The old stone-made arch bridge over the Kerava River in Kerava,
Finland A bridge is a structure built to span a physical obstacle （such as a body of water, valley, road, or rail） without blocking the way underneath.
It is constructed for the purpose of providing passage over the obstacle, which is usually something that is otherwise difficult or impossible to cross.
There are many different designs of bridges, each serving a particular purpose and applicable to different situations.
Designs of bridges vary depending on factors such as: the function of the bridge, the nature of the terrain where the bridge is constructed and anchored, and the material used to make it and the funds available to build it.
The earliest bridges were likely made with fallen trees and stepping stones.
The Neolithic people built boardwalk bridges across marshland.
The Arkadiko Bridge （dating from the 13th century BC, in the Peloponnese） is one of the oldest arch bridges still in existence and use.
The Arkadiko Bridge in Greece （13th century BC）, one of the oldest arch bridges in existence The Siosepol bridge over Zayandeh River is an example of Safavid dynasty （1502–1722） bridge design.
Isfahan, Iran.
The 13th century Wetherby Bridge spans the River Wharfe.
The Oxford English Dictionary traces the origin of the word bridge to an Old English word brycg, of the same meaning.
The word can be traced directly back to Proto-Indo-European *bʰrēw-.
The word for the card game of the same name has a different origin.
Seasonal bridge north of Jispa, H.P., India.
2010 Bridges in Amsterdam, Netherlands The simplest and earliest types of bridges were stepping stones.
Neolithic people also built a form of boardwalk across marshes; examples of such bridges include the Sweet Tr...