The actual construction of an arch bridge is difficult

Arch bridges have a beautiful design. Early arch bridges were made of cement and stones. They proved to be very strong. Many early arch bridges are still standing today. The design allows the weight to be carried along the arch to the ends rather than being pushed straight down. Supports are added to the ends to make the bridge even stronger. These supports, called abutments, keep the ends from spreading out and cracking. This is the secret to why the design has held through the test of time.

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