12/20/2023 0 Comments Truss arch bridge![]() Compression, or compressive force, is a force that acts to compress or shorten the thing it is acting on. Two major forces act on a bridge at any given time: compression and tension. To understand how bridges work, we must understand the forces that act on every bridge. Three basic types of bridges used in transportation are: beam and truss bridges, arch bridges and suspension bridges. (Show a map of Vancouver, BC, Canada, or another city with many bridges.) For example, the jutting features of Vancouver would be difficult to access if it were not for the bridges that tie this region together. Think about bridges as a way that engineers help us bring worlds together. Who designs these bridges? Civil engineers do. Bridges enable roadways to pass through varying terrain, over waterways and through mountains with minimal deviation, saving time in transport or commute or even connecting areas that would otherwise be inaccessible. What impacts do bridges have on our communities and cities? Bridges provide essential links between places, providing us with access to resources, other places and other people. (Optional: Provide each student with a copy of the Bridge Notes Worksheet to fill-in what they know about bridges before the activity and take notes on during the introduction portion of the activity.)
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