The step involving construction documentation CAD is the one that most BIM courses omit, since it is the aspect that contractors actually rely upon. Although a well-presented 3D model makes a good impression when shown to clients, no mason, plumber or electrician builds directly from a Revit model on a screen; instead they work from 2D sheets such as dimensioned floor plans, sections, elevations and details which are posted in the site office. For site engineers and junior ar