What are the three main types of walls?

Three main types of walls by structural function are load bearing walls, non-load bearing partition walls, and retaining walls. Load bearing walls are structural walls that support weight of floors, roof, and upper stories and transfer loads to foundation, including most exterior walls and some interior walls, essential for building stability. Non-load bearing walls, also called partition walls or curtain walls, divide interior spaces into rooms but do not support structural loads, can be moved during remodeling, typically made of wood or metal studs with drywall. Retaining walls are walls designed to hold back soil or water and resist lateral pressure, used in landscaping, basements, and foundations to prevent soil erosion and collapse. Another classification by construction includes masonry walls, framed walls, and cavity walls. But functionally, load bearing, non-load bearing, and retaining walls are three main types that cover primary roles of supporting structure, dividing space, and holding back earth.