Hello everyone.
And welcome to my presentation 2D to BIM story and better
approach to concrete design and detailing.
My name is Tomasz Fudala and I'm the Technical Marketing
Manager for Structure at Autodesk.
In this first video,
I will cover the differences between CAD and BIM.
Be sure to check out all the videos in the series.
CAD has been an important part of the AEC industry for
decades in the early eighties,
CAD was a significant innovator that radically transformed
the commendation efficiency, for the industry.
CAD has also helped move the AEC industry far beyond
manually produced paper drawings,
enabling us to produce more complex and accurate designs.
CAD programs are still in wide spread use
by engineers and detailers across the world.
But today, the AEC industry faces new challenges.
Financial constraints, for example,
are placing the entire AEC industry under increasing pressure
to deliver projects more quickly and accurately.
As a result, AEC firms are looking beyond
CAD to find a solution.
Some of the challenges we are hearing include, increasing
project complexity can lead to inaccurate estimates,
due to a lack of design information.
Detailers need a faster and more seamless way to
collaborate with the design team.
During the detailing phase in particular,
data is often disconnected from the rest of the design team,
leaving gaps in the project workflow.
A lack of skilled engineers,
detailers and shop workers impacts quality
even across global teams.
This places greater pressure on the fabricators,
to automate the lines, to increase output.
A lack of job site coordination creates
waste and inefficiencies.
Fabricators are being asked to use technology to provide
greater insight into how they will deliver
and install building components.
These are types of challenges addressed by BIM.
Many of you may be thinking, okay, what exactly is BIM?
BIM stands for, for Building Information Modeling.
And it is an integrated process of creating and
managing information for a build asset.
It is a process for exploring projects, key physical
and functional characteristics digitally,
before it is built.
The coordinated, consistent information used throughout the
BIM process helps architects, engineers, contractors,
civil engineers, and owners
to see and understand prior to construction what their
design will look like and more importantly,
how it will perform. Using the BIM process,
the intelligent information informs
the building process along the way.
This visibility enables all members of the project team,
to contribute to its success through better coordination,
improved accuracy, and the ability
to make more informed design decisions.
earlier in the process.
In the recent years, the move from CAD to BIM has
accelerated, as BIM workflows have proven
to deliver many benefits over CAD.
BIM has rapidly evolved from a new technology to an
accepted standard in many countries and BIM guidelines
are becoming increasingly common around the world.
Now let's take a quick look at one of the major differences
between AutoCAD, a well-known CAD software
and Revit, a popular BIM authoring software.
Naturally this discussion could lead us down many paths.
But I would like to start with the,
fundamental differences in the workflow.
With all its tools and sophisticated features at its core,
AutoCAD is essentially and digital drafting board.
It doesn't fundamentally change the basic drafting workflow
utilized by many design professionals in any noticeable way.
In other words, before you can create drawings in AutoCAD,
you have to decide what kind of drawing you are making.
Are you making a plan or a section?
If you want to create a plan,
you begin creating a series of lines and
curves to represent your structural design.
Specifically as a plan,
you then need to repeat this process to create a section or
some other kind of drawing that might be required.
In some cases you can copy and reuse parts of your drawings,
but these copied elements are not connected
to one another in any way.
When changes occur to your design,
you will have to update each drawing
individually to reflect those changes.
In Revit, the process is fundamentally different.
Instead of drafting individual drawings,
we built a single representation of our structural model.
This model is created from a collection of well-known
structural components, such as columns, beams, walls,
slabs, foundations, and of course rebars,
when it comes to detailing.
Each of these elements has its own settings and parameters
that in establish meant to be present and in the entire
group of structural elements comprises a single model.
This model may be viewed in plan, section, elevation,
3D or scheduled views as designed and users may define
the rules for each of these view orientations
to ensure they match industry and firm standards.
It is important to understand that in Revit
these views are not separate drawings,
but simply different way of looking at the same model.
At a glance, it may seem that the AutoCAD and
Revit approaches are similar.
But the result is completely different.
The use of a model based approach in Revit means that
when a change is made to any view,
that the change is immediately reflected in all the views.
The views cannot fall out of sync.
They are simply live representation of the same model.
Additionally,
using a BIM centric solution allows users to design and
detail with clash prevention in mind
to reduce clashes both in the pre-construction
inside execution project phases.
Using a BIM approach with Revit,
we create a federated building information model.
An aggregated assembly of distinct models for each
discipline, comprising a single complete
model of the building.
A single federated model is useful for design
coordination, clash avoidance and clash detection,
approval processes, design development estimating,
and so on.
The individual models are maintained as a separate
file, which with clean auto-ship and scope
definitions, but they are able to
be brought together as needed.
These are the fundamental differences between
AutoCAD and Revit.
For many firms, these represent the primary
benefit of using BIM over CAD.
In the next section, I will explain the benefits
of modeling reinforced concrete structures in Revit.
So please check it out.