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Revit 与 IFC 交换的手册
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2018-12-18
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详细讲解了Revit与IFC格式的交换机制和具体的转换选项含义!
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Detailed instructions for handling IFC files
Revit IFC manual
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Autodesk Revit IFC manual
INSTRUCTIONS FOR REVIT USERS
1. INTRODUCTION ....................................................................... 3
2. THE BASICS .............................................................................. 5
2.1 IFC file formats 5
2.2 IFC versions (schema) 5
2.3 Model view definition (MVD) 6
2.4 IFC structure 8
2.4.1 IFC classes and types 9
2.4.2 Geometric representation of IFC items 10
2.4.3 Default attributes 11
2.4.4 Reference structure within an IFC file 14
2.5 LOD 14
2.6 Open-source IFCs 15
2.7 IFC viewers 16
3 LINKING IFC FILES IN REVIT................................................ 17
4 OPENING IFC FILES................................................................. 18
4.1 Mapping table 18
4.2 Import options 19
5 EXPORTING IFC FILES............................................................. 22
5.1 Mapping tables 22
5.2 Revit IFC exporter settings 25
5.2.1 General settings 26
5.2.2 Additional content 31
5.2.3 Property sets 32
5.2.4 Level of detail 37
5.2.5 Advanced settings 38
5.3 Other settings 40
6 EXAMPLES OF APPLICATIONS .............................................. 44
6.1 Floor slab construction 44
6.2 Aperture planning 45
6.3 Assigning assemblies 47
6.4 Assigning default attributes 48
6.5 Structuring the IFC data model 50
6.6 Usage groups in the IFC data model 51
7 SUMMARY ................................................................................. 52
CONTENTS
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Autodesk Revit IFC manual
INSTRUCTIONS FOR REVIT USERS
BIM (Building Information Modeling) is an intelligent 3D model-based process that gives
architecture, engineering, and construction (AEC) professionals the insight and tools to more
efficiently plan, design, construct, and manage buildings and infrastructure. At the heart of BIM is
a smart building data model that incorporates not only 3D geometry but also all the relevant data
relating to the building and its components. This kind of building data model can only be created
using complex, BIM-enabled software such as Autodesk Revit
®
.
1. INTRODUCTION
Provided that all of those involved in the
planning are working with the same software,
data exchange is loss-free. The native BIM
format also facilitates the coordination of all
planning stages and stakeholders.
In building projects, it can happen that
those involved in the planning process are
using different BIM software from different
providers. The buildingSMART initiative (www.
buildingSMART.org), in which Autodesk has
been actively involved from the very outset,
has developed the IFC format to support such
openBIM workflows. IFC allows the exchange
of a specific subset of the native model.
Since the IFC4 release, the IFC format has met
a recognized ISO standard (ISO 16739:2013). In
its current version, buildingSMART maintains a
list of all applications with certified IFC support:
www.buildingsmart.org/compliance/certified-
software/
IFC as the standard for exchanging BIM information
The Industry Foundation Classes (IFC) are an open standard for the exchange of building data models
used in building design and construction across different software. They are used to exchange
information within a project team and between software applications used in design, construction,
procurement, maintenance, and operation. Current IFC Model View Definitions primarily support 3D
geometry and property data. If exchange of 2D information, such as plan views and annotations,
is important, Revit and coordination tools such as Autodesk BIM 360 which support the native file
format should be preferred.
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Autodesk Revit IFC manual
INSTRUCTIONS FOR REVIT USERS
With IFC, the standard workflow is as per this model:
Find out more on the buildingSMART website:
https://www.buildingsmart.org/users/international-user-group-faqs/
Native format IFC
Coordination/
No editing
Using IFC in practice
In an ideal scenario, the IFC file should be used
for coordination purposes in an IFC viewer or
as a reference within the editor software. For
instance, the architect would receive an IFC file
from the building equipment engineer, allowing
them to see where the installation is placed.
This workflow is referred to as the coordination
workflow and is covered with the Coordination
Model Views in IFC.
In some cases they may be the need for a design
transfer workflow, for example if the architect
had created the design in another software, but
needs to carry on planning the building in Revit.
This is the more difficult workflow and often
requires manual adjustments to deal with the
differences in software.
The Revit IFC manual
This document is intended to serve as a guide
for Revit users handling IFC data and providing
a better understanding of the settings available
in Revit, discussing the way they can influence
the quality and the content of the IFC file. The
Revit IFC manual therefore sets out the basics
of IFC and explains in detail how to export, link
and open IFC files in Revit.
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Autodesk Revit IFC manual
INSTRUCTIONS FOR REVIT USERS
The key considerations when using an IFC file are the file format, IFC version, model view definitions,
and file structure. We explain all these on the following pages.
2. THE BASICS
2.1 IFC file formats
.ifc
Standard format, based on STEP (STEP: Standard for the Exchange of
Product Model Data).
.ifcZIP
Compressed IFC files with much smaller file size; can be read by most
software applications that support IFC. It can be unpacked to make the
uncompressed IFC file visible.
.ifcXML
XML-based representation of IFC data, required by certain calculation
software.
2.2 IFC versions (schema)
The IFC definitions are regularly updated and developed by buildingSMART. It is recommended that
you use the latest versions wherever possible. Among other things, the IFC4 format allows better
representation of complex geometries.
Current versions:
• IFC4 (still in beta, certification process in progress, offers certain advanced possibilities but is
not widely supported yet);
• IFC2x3 (currently the most supported and stable format, certified in Revit and recommended for
production);
• IFC2x2 (recommended if the recipient of the file does not have software with IFC2x3 or IFC4
support).
Revit no longer supports the following older versions: IFC2.0 (import still supported), IFC1.5.1,
IFC1.5, and IFC1.0
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