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161
New CAD on the Block
By: Elizabeth Bollinger
Date: 18 April 2001
Web Address:
http://www.ArchitectureWeek - Tools - New CAD on the Block 2001_0418.htm
http://www.ArchitectureWeek - the magazine of design and
building.htm
Presented By:
Nermin Galal Bahgat Salem
The Hillier Group, of Princeton, New
Jersey, has a long history with computeraided design
Recently the architecture firm has added
to their repertoire a new software product
that they believe to be revolutionary in the
world of CAD
Revit, offers an integrated, digital model of
a building that can be used to maintain
and operate that building throughout its
lifecycle
Why Revit is Different
Revit Technology Corporation has revolutionized the way
buildings are designed, constructed and operated
throughout their lifecycle (the first parametric building
modeler)
This technology gives building design elements the
"intelligence" necessary for them to understand both
their own properties and how they should relate to the
rest of the design
Design elements can be physical components such as
walls, windows, or roofs, but they also include plans,
elevations, sections, dimensions, and even drawing
sheets, schedules, and renderings
A parametric change engine is necessary to provide the
context for these components to be assembled into a
cohesive design. That change engine must be able to
handle the effect of a single change in very large
buildings
That’s meanRevit stands out as the only AEC software
tool that can promulgate a change throughout a 3D
model from any view of the building. With more
traditional CAD software, you must rework the model to
successfully publish any drawing updates
With Revit you can make a data change in a schedule or
a graphic change in a drawing layout view, and all
references to that item are changed everywhere. There
is no need to publish a new set of updated files and
there is no way to accidentally damage a model with 2D
commands
Revit at Work in Practice
In the Newark office of Hillier, Howard Davis is project
manager for the Commercial Realty & Resources
Corporation (CRRC) building, a two-story, 40,000square-foot (3700-square-meter) office building located
in Wall, New Jersey
A portion of the floor
plan construction
drawing of the CRCC
building
A wire frame view of
Hillier's 3D model created
for studying the CRCC
building's interior office
layout
A wire frame view of
the CRCC exterior
The project, whose
scope consists of
designing and
documenting both the
interior and exterior, is
similar to other projects
Hillier has done for the
same client
Therefore the firm was
familiar with the systems
and materials, which Davis
said made this project
ideal for a Revit beta test
within six hours they
were able to produce floor
plans, elevations, and
most importantly, several
3D design studies.
They worked with
rendered models to
develop ideas for
exterior materials
A partially rendered
model for studying
the CRCC building's
exterior entrance
The CRCC building
model partially
rendered to study
the exterior
A partially rendered
model for studying
the CRCC building's
exterior entrance
Recent Developments
Revit began volume shipments of
Revit's first release in April, 2000 and
was well received when exhibiting the
product at the American Institute of
Architects national convention in
2001
Today Revit is in its third release, with
over 500 architecture firms
subscribing. In the recently released
version 3.0, Revit introduces
"worksets," which extend the
software's multi-user functionality
The latest release of Revit
improves the system's
support for 2D
construction drawings
With worksets, multiple users
can work on a model
simultaneously without
problems with version control
Worksets allow team members to work simultaneously
on separate sections of a single building model. Team
members can view the entire model, but individuals can
edit only components within worksets they have
"checked out" of the shared model. Changes can be
saved on the fly and are available to other team
members when the workset is returned to the shared
model
Revit also introduces in its new release the concept of
4D, or time-related properties. Components can now be
associated with construction phases and be related to
each other over time intervals
The construction and demolition of any component can
be recorded in a phase, and multiple generations of
phased construction documents can be created from the
single parametric model as for existing structures,
multiple generations of renovations can be recorded
sequentially in one model
The Subscription Model
Revit Technology has implemented an Internet and ecommerce-based subscription model that eliminates
high initial costs for its clients. The company has also
made innovative use of the Internet in marketing, sales,
training, and client service
Revit is available by subscription on a month-to-month
basis with prepayment discounts for longer terms. With
quantity discounts available starting with as few as two
seats, subscribers have access to all upgrades,
instructor-led Internet-based training, customer
support, and maintenance, current subscribers can
download the product and subsequent releases and
upgrades via the Internet
favorite Autodesk® Revit®
features
1. Revit Building Maker
Access a better
workflow for common
conceptual and
schematic tasks.
Easily create
expressive forms to
produce an overall
massing study. Then
select faces to design
walls, roofs, floors,
host objects, and
curtain systems. You
can even use tools to
extract important
information such as
gross area per floor
2. Vectorial Shadows
See the effects of
changing design features
as you edit with shadows
that adjust in real time as
your model changes
3. Sectional Perspectives
Explain your design intent better using
sectional perspectives, a flexible tool
that complements other features in
Autodesk® Revit® 7, including hiddenline and shaded views, vectorial
shadows, capped section boxes, and
silhouette edges
4. Legends
Create symbol legends
without adding elements to a
project. Use them to display
model and annotation
elements. And since legends
are fully associative, you can
make changes in your
design, and the legend’s
graphic symbol display
always stays coordinated
5. Stacked Walls
New to Autodesk Revit 7,
stacked walls more easily
describe cases where wall
thickness changes at
different building heights.
These subwalls can also be
scheduled.
6. Revit Parametric
Components
Parametric Components can
be used to generate the most
elaborate assemblies—
including intricate iterative,
algorithmic, and behavioral
characteristics—as well as
the most elementary building
parts
7. Import Improvements–
ACIS
Collaborate better with users
of AutoCAD® software and
other CAD applications, by
importing 3D solid geometry
9. Revit Worksharing
Revit Worksharing
distributes the
power of the
parametric building
modeling
environment across
the project team.
Worksharing
provides a complete
range of
collaboration modes
THANKS