CADD Standards Layering

Layering
CADD Standards • Version 1.0

AIA layering guidelines are the basis for the layering system. This uses a 7 pen layering system. Colors are used to assign pen weights for plotting. Layers are named in the following format:

The construction category is represented by a single letter designating the type of construction (i.e. Architectural, Structural, Mechanical, Plumbing). The hyphen following the construction category indicates this is new construction. The first hyphen is replaced by an 'X' for existing to be demolished and by an 'E' for existing to remain. Refer to Appendix 'A' for a complete listing of the most commonly used layer names.

Pick the layering system needed depending on the phase of your drawing (i.e. existing, new, demo). Be sure to use the layers best applicable for the task you are performing. The creation of new layer, not listed in appendix 'A' will need to follow the AIA guidelines. Verify the creation of all new layers with the MIS.

The chart in Appendix 'B' represents the standard layer colors with associated pen weights for a standard drawing. These layer standards can be applied to new drawings by devising a set of template drawings.