Autodesk 256B1-05A761-1301 - AutoCAD Revit Structure Suite 2010 User Manual page 1510

When aligning or dimensioning the wall, you can choose to measure from the center of the core or from
the interior face or exterior face of the core. See Vertically Compound Walls on page 639 and Dimensioning
to Core in Compound Structures on page 276.
crop To limit the boundaries of a view, omitting parts of the building model from the view.
See also crop region.
crop region A user interface mechanism that defines the boundaries of a view. Elements in the building
model that are outside the crop region do not display in the view or on a sheet on which the view is placed.
In the following floor plan view, the inner, solid red line indicates the model crop region. The outer, dashed
red line indicates the annotation crop region. For more information, see Crop Regions on page 211.
CSI See Construction Specifications Institute (CSI) on page 1466.
curtain system A building component consisting of panels, curtain grids, and mullions. A curtain system
usually does not have a rectangular shape. (Compare with curtain wall on page 1468).
For more information, see Curtain Systems on page 785.
curtain wall An exterior wall consisting of panels connected by joints or mullions. The panels can be made
of glass, brick, or other materials.
1468 | Glossary