Archways are often free standing elements in gardens or parks, which is why we deal with them here under "Object Greening". We show different constructs, and possibilities how to green them up. But please also take note of the themes "Pergola" and "Canopies". Some arcades border on buildings or combine buildings. Further more, there are archways that act as outer corridors on buildings. Some examples on the page climbing plant walls.
Archways and arcades can have angular or round roofs made of wood or metal. They are often built like pergolas. Modern, basic components are round arches made of steel pipes that are grounded in the earth, and angled and braced up top. There are kits available for such projects. In addition, wooden slats are installed, or a wire rope arrangement similar to that of a pergola is added. How to green these structures? Take a look at the page pergolas. The concept is pretty much the same.