PCAD+

Building Information Modeling is a design and documentation methodology based on coordinated, high quality information. It enables design and construction teams to create and manage information about a building project consistently and reliably across the scope of the project. The information is stored in a single building model. This ensures that information is coordinated, consistent, and complete. Revit Structure Training from frank lloyd betana

Creating Your Own Linetypes AutoCAD and AutoCAD LT come with a large number of linetypes and hatch patterns. However, when these do not serve your particular needs, you can create your own linetypes and hatch patterns.  You can then use them in your drawings in the same way that you use the linetypes and hatch patterns that come with the software. Linetypes are useful whenever you don’t want a continuous linetype. They apply not only to lines, but also to polylines, arcs, ellipses, wireframes, and solids—in fact, to most objects. You use hatch patterns to fill in closed (or almost closed) areas. Hatch patterns often represent textures or materials. Creating Linetypes There are two types of linetypes: simple and complex. Simple linetypes consist of only dashes and dots. Complex linetypes usually have dashes and/or dots, but also contain text and/or shapes.  The default linetype file is acad.lin for AutoCAD and acadlt.lin for AutoCAD LT. You can add your own linetype definitions