Autodesk 24000-000000-9860 - Revit Architecture - PC User Manual page 852

Creating Beam Systems for Non-Identical Boundaries
When creating a beam system, if both areas are not identical in shape and supports, then the pasted beam
system area may not attach to supports as expected. In such a case, you may need to modify the beam
system.
In the plan view illustrated below, notice that there are four distinct quadrants. Quadrants 1 and 2 are
identical in area and support structure. Quadrants 3 and 4 are more complex
Structural design with four quadrants
In the example shown above, you could
Add a separate beam system to each quadrant. This is the best action to take because you can ensure that
the beam system boundaries are locked to the supporting members by using the Pick Supports tool.
Add a beam system to Quadrant 1 and copy it to Quadrant 2. You can do this since the area and support
structure is identical. However, make sure the pasted copy attaches to all supports. You may need to
modify the pasted beam system.
Add a beam system to Quadrants 1 and 3 and mirror it to Quadrants 2 and 4 by selecting Grid 2 as the
mirror axis. This process has the same limitations as copying and pasting. You may need to modify the
system and re-pick the supports to ensure that the system is locked to a supporting member.
In the example shown above, you should not
Add a beam system that spans multiple quadrants. The intersecting beams on Grids 2 and B would not
cut the beam system; therefore, any intersections between girders and joists in such a beam system would
not display.
Copy and paste the beam system from Quadrant 1 to Quadrant 3. The area, shape, and number of their
supports differ significantly.
Cutting an Opening in a Beam System
You can cut an opening in a structural beam system by sketching a loop of lines inside the beam system
boundary.
814 | Chapter 12 Working with Structural Components