The site work drawings include architectural plans, title and legend sheets, plot plan, foundation plan, floor plans, and roof framing plans, interior elevations, trade plans and specifications. The details in the site drawings may vary based on building design, owners need and the architect. Good and specific site drawings are important for plan visualization, a process by which architects visualize the final design based on the site work drawings. Orthographic projection is a technique by which designers create drawings of three dimensional objects from the projections of straight lines. The projection represents objects drawn with common relationship.