This architectural drawing is an AutoCAD 2D drawing of the longitudinal section of the lower level of the earthwork with details, CAD file, and dwg file. A longitudinal section is a section taken through a structure's lengthwise dimension. Longitudinal sections of roads, canals, bridges, and other structures can be used to calculate the theoretical gradient of a proposed structure based on existing surface conditions. For more details and information download the drawing file. Thank you for visiting our website cadbull.com.