Wall

The wall is a solid structure which limits and sometimes protects an area. Generally, limiting wall of a building and other support structures, limiting the space in buildings into rooms, or to protect or limit any outdoor space. Three main types of structural walls are the walls of buildings, retaining walls (boundary), as well as retaining wall (Retaining).
The walls of the building has two main functions, which support the roof and the ceiling, dividing the room, as well as protect against intrusion and weather. Retaining walls include privacy walls, boundary walls and walls of the city. The walls of this type is sometimes difficult to distinguish from the fence. Retaining wall serves as penghadang soil movement, rock, or water and can be either external or internal parts of a building.