Technical drawings may comprise two-dimensional plans, sections and elevations, or may include three-dimensional or exploded projections. They may be drawn to scale by hand, or prepared using Computer Aided Design software. However, increasingly, building information modelling software is being used to create three-dimensional representations of buildings and their components. For more details download the CAD file from our cadbull websit. This can be used by architects and engineers. Download this 2d AutoCAD drawing file.