Wall+OP

===A wall is a usually solid structure that defines and sometimes protects an area. Most commonly, a wall delineates a building and supports its superstructure, separates space in buildings into rooms, or protects or delineates a space in the open air. === === · __Retaining Walls __: are special types of wall that may be either external to a building or part of a building that serves to provide a barrier to the movement of earth, stone or water. === === · __Portable Walls __: can be static such as cubicle walls, or they can be wall panels mounted on casters to provide an easy way to reconfigure assembly space. ===