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Grids
Grids are AEC objects on which you can anchor other objects, such as columns, and constrain their locations. Grids
are useful in the design and documentation phases of a project.
Types of Grids
There are several types of grids, each with its own purpose:
Layout grids help you position objects relative to each other in your building design. For more information about layout
grids, see “
Layout Curves and Grids ” on page 1474.
Column grids are layout grids that place a column at each intersection of the grid as you add it to your drawing. They
are unique also in that they have automatic labeling tools. For more information about columns, see “
Creating a
Freestanding Column ” on page 1396 or “ Creating Grid-Anchored Columns ” on page 1398.
Ceiling grids are specialized layout grids that represent suspended ceiling systems or cassette ceilings. They can be
anchored to a space object at ceiling height.
All of these grid types share some common features.
Layout Types for Grids
There are 3 different layout types that control the spacing of lines in a grid. Layout type is specified separately for the
X and Y planes.
■
Manual: You specify the position of each line on the grid.
■
Repeat (Fixed Bay Size): You specify equidistant spacing between lines on the grid. The number of lines is
determined by the size of the grid. As the size of the grid changes, lines are added or subtracted accordingly. The
distance between lines remains fixed.
■
Space Evenly: You specify the number of lines on the grid. The space between lines is determined by the size of
the grid. As the size of the grid changes, the spacing between lines is lengthened or shortened accordingly. The
number of lines remains fixed.
NOTE By default, grids are inserted with evenly spaced lines.
Anchoring Objects to Grids
Grids can be used to anchor other objects. This is most visible in column grids, where special functionality allows you
to anchor columns to the grid during insertion. Once the grid is inserted, you can add other objects to it as well.
There are 2 anchoring mechanisms available for grids:
■
Anchoring objects to a grid cell (Cell Anchor)
■
Anchoring objects to a grid intersection (Node Anchor)
For more information about anchoring objects, see “ Anchors ” on page 1454.
Using Column Grid Tools to Create Column Grids
Tools in the software let you quickly place column grids using a structural column grid tool with specific predefined
properties. You can use the default settings of the tool, or you can change the properties. You can also use structural
column grid tools to convert linework to column grids, and to apply the settings of a structural column grid tool to
existing column grids.
1498 | Chapter 32 Grids