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498 | ChaPTER 12 Creating Walls and Curtain Walls

Figure 12.28
stacked wall
attached to an
extruded roof

When you use the attach method, be mindful of how the software treats walls that are
attached to other objects. After you use this method, the instance parameters Top Is Attached
and Base Is Attached will show the status of the selected wall’s attachment. These are read-only
parameters and are for information only. Be aware that the top constraint and any other offset
or height value will not display the actual height of the wall when it is attached to something.
For example, if a wall whose base constraint is Level 1 and top constraint is Level 4 is attached
to a floor slab on Level 2, the wall’s top constraint will still be listed as Level 4 in the Properties
palette. This anomaly does not affect other calculations such as wall length, area, and volume.

automatically attaching Walls to Floors

When you create a standard floor by sketching a boundary, the floor is hosted on a specific level.
after you complete the boundary sketch and finish the editing mode, revit offers you some help
to attach walls to the floor. any wall whose top constraint is the level on which the floor is hosted
can be automatically attached to the bottom of the floor.

as a bonus, you can access this functionality at any time—not just when you create a floor. if you
forgot to attach the walls to the floor when you first modeled the floor, simply select the floor and
then click edit Boundary. Click the finish edit Mode button, and you should be prompted to attach
walls to the floor.

c12.indd 498 5/3/2014 11:12:48 AM