WOOD ARCH BRIDGE SERIES
When doing this it means you create a series of bridges joined together.Ī beam bridge may include several beams running in parallel to support the deck above.
To achieve a longer continuous span, (e.g., over 250 ft (80 m), piers need to be added to provide extra support. In its most basic form, all that is needed is a crossbeam long enough to cover the span, and support from abutments under each end. Requires considerable expertise to build.īeam Bridges Above: Beam bridge constructed using steel and concrete.īeam bridges are the simplest type of bridge.Requires strong side support to complete a successful span.Time-consuming to construct and maintain.Creating a long span length requires more arches.Can be constructed from many different materials stone, brick, concrete, iron, and steel.Greater span compared to beam bridges (though less span than cantilever and suspension types).Adapts to local environmental conditions well.High levels of strength and resistance (many Roman bridges still exist).Whatever material is used the principle remains the same: An arch bridge uses compression – downward pressure from the deck travels laterally towards the keystone and to the supporting structures at each end of the bridge (the abutments). However, in modern times you will see arch bridges constructed from concrete. This method dates back many thousands of years, with stone and brick being the most commonly used materials. Above right: a more modern arch bridge made using concrete.Īrch types of bridges use one or more arches as the main structural component, with the arches positioned beneath the deck. Arch Bridges Above left: Arch type of bridge constructed using brick and stone.
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