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Defining Divisions for Curtain Wall Unit Grids
The divisions of a grid define the orientation that determines the direction
of the grid cells and mullions, and they define a division type that determines
the number and size of cells.
NOTE Creating a nested grid is not a division rule. To create a nested grid, add
a cell assignment. For more information, see Creating a Nested Grid in a Curtain
Wall Unit on page 1599 and Working with Nested Grids in Curtain Walls on page
1464.
You can create a variety of division definitions under different names, and
then assign different divisions to each grid in your curtain wall unit. Although
you can create multiple definitions, there can be only one division assignment
per grid. You create division definitions for a specific curtain wall unit style
and those definitions can be assigned only to grids in curtain wall units of
that style.
For more information about assigning divisions to a particular grid, see
Assigning a Division to a Curtain Wall Unit Grid on page 1597.
Division of Curtain Wall Unit Grids
A curtain wall unit consists of one or more grids, which are the framework
for placing design elements in the curtain wall unit. The highest-level grid is
the primary grid, which is also the outside edge of the curtain wall unit.
Each grid in a curtain wall unit has one division assignment that determines
whether the grid is divided horizontally or vertically. The division also
determines the number of cells, their size and their placement.
Within the primary grid, you can define multiple levels of grids. These grids
within are called nested grids. Each subdivision of a grid is called a cell.
Creating a Division Definition for a Curtain Wall Unit
Use this procedure to create divisions for a curtain wall unit grid.
Because curtain wall units can contain multiple nested grids, it is helpful to
use a naming convention for grids that indicates the level of each grid and
the grid location or the purpose within the curtain wall unit. For example,
L3-FL1-Stone Panels can identify a third level grid that provides a row of stone
panels on Floor 1.
1570 | Chapter 21 Curtain Walls
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