WHAT
EXACTLY
is BIM?
INTRODUCTION
BIM is a method of creating and managing information on a construction
project over the course of its life cycle. A coordinated digital description of
every aspect of the built asset is developed as part of this process, using a
set of appropriate technology. This digital description is likely to include a
mix of information-rich 3D models and associated structured data such as
product, execution, and handover information.
The BIM process and associated data structures are best defined
internationally in the ISO 19650 and 12006 series of standards.
WHAT EXACTLY ARE BIM DIMENSIONS?
BIM dimensions originated from the need to distinguish between modelling
geometry in two or three dimensions. This is part of the evolution of modelling,
from drawing boards to the first 2D CAD systems to 3D modelling packages.
Adding more aspects to this modelling can assist project teams in understanding
what information they are attempting to model. 4D is often referred to as
modelling scheduling information to model construction sequences.' 5D is
referred to as 'adding financial cost.' Beyond that, there is little international
agreement, and the cost is arguably not a 'dimension' at all - it is simply another
information field.
However, this article focuses on the more commonly used 'BIM dimensions.' They
could be useful phrases to start conversations with clients, demonstrate different
BIM use cases, and help develop more precise requirements.
2D BIM
2D BIM is a digital geometric model that is comprised of an X and Y
axis linked to additional information. Early CAD systems were 2D
models in which plans and sections could be created on computers
faster and more accurately than on a drawing board.
Parameters, constraints, and concepts can now be attached to the
2D model using more advanced modelling tools. However, most
industry professionals do not consider 2D geometry models to be
BIM.
3D BIM
3D BIM is a digital geometric model that includes an X, Y, and Z axis in addition to
additional information. 3D modelling tools have been a huge success because:
●
At various levels of detail, 2D views of geometric information can be
generated from the 3D model.
●
Schedules can be generated to report on various types of objects within the
3D model.
●
To report on any geometric clashes, multiple 3D models can be combined.
All of these features improve accuracy and efficiency while lowering the risk of
project errors.
Furthermore, when specific information is added or linked to these models,
additional benefits are realised.
4D BIM
4D BIM is incorporating scheduling data into model construction
sequences. By including a time dimension, the project team can
better visualise how the construction will be sequenced. This is
critical from the standpoint of a contractor. When it was first made
possible by the use of new modelling tools, 4D BIM was a huge step
forward for the industry - it illustrated collaboration between the
construction and design teams through the coordination and sharing
of 3D models.
5D BIM
5D BIM is typically believed to be the addition of cost information to
a model. When discussing 5D BIM, it is best to spell out these
specific requirements. Is the team, for example, expected to provide
capital or operational costs? Is it expected that these costs will be
pre-tender estimates or a record of as-built costs? Who is in charge
of adding this information? What measurement method will be
used?
6D BIM
Some believe that 6D BIM adds facility management to the
information set. However, there is little industry agreement on this,
and it could be argued that this isn't a 'dimension' at all. When
discussing 6D BIM, it is critical to spell out exactly what is expected
so that all parties are on the same page.
7D BIM
Some believe that 7D BIM adds sustainability information to the
information set. As with 6D BIM, carefully define the specific
information required in regard to data types, scope, units,
measurement rules, and so on.
8D BIM
Some believe that 8D BIM adds health and safety information to the
information set. As with 6D BIM, carefully define the specific
information required in terms of data types, scope, units,
measurement rules, and so on.
I hope this article would be helpful for you. And If you need any help
regarding BIM management services, then you can contact
greenbuildings.me
THANKS!
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