Autodesk 24000-000000-9860 - Revit Architecture - PC, User Manual

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However, if room-bounding elements occur within the range of the room’s defined limits, Revit Architecture
uses the space defined by the room-bounding elements when computing the volume. For example, if a
ceiling or roof occurs below the specified upper limit of a room, then Revit Architecture computes the volume
up to the room-bounding element.
For rooms under roofs, such as attic spaces, specify an upper boundary that is greater than the height of the
roof. This strategy ensures that the volume is computed up to the roof pitch. For example, the following
section view shows a room that starts at Level 1 and extends 7000 mm above Level 2 (indicated in blue).
When computing the room volume, however, Revit Architecture uses the intervening roof as the upper
boundary for the room (indicated in red).
When a floor occurs above the computation height, it becomes top-bound, not bottom-bound, which results
in an incorrect room volume. This situation typically occurs when the ceiling is modeled as part of the floor
or when you move a floor to a point above the room's lower boundary. If this occurs, create a new level for
the elevated floor, and add the room on this level. Then Revit Architecture can compute the room volume
correctly.
Sharing Room/Space Information Between Revit Architecture and
Revit MEP
In Revit Architecture, architects use rooms and areas to divide a building model by usage, occupancy, or
other criteria. In Revit MEP, engineers use spaces and zones for analysis of heating and cooling loads.
Architects and mechanical engineers who collaborate on a Revit project need to understand some behavior
about Revit rooms and spaces.
Workflow: Linking an MEP Model to an Architectural Model
The following describes a typical workflow for an architect and a mechanical engineer collaborating on a
project:
1 The architect uses Revit Architecture to create a project.
All building geometry is defined in the Revit Architecture project. The project may include rooms
defined by room-bounding elements and room separation lines.
2 The mechanical engineer does the following:
a Uses Revit MEP to create a new project.
b Creates a link to the Revit Architecture project.
See Linking Revit Models on page 1213.
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