•Robert S. Weygant, CSI, CDT, SCIP

•Robert S. Weygant, CSI, CDT, SCIP
•Email: [email protected]
AIA
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Provider with The American Institute of Architects
Continuing Education Systems. Credit earned on completion
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professional education. As such, it does not include content
that may be deemed or construed to be an approval or
endorsement by the AIA of any material of construction or
any method or manner of handling, using, distributing, or
dealing in any material or product. Questions related to
specific materials, methods, and services will be addressed
at the conclusion of this presentation.
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Construction Specifications Institute of Alexandria, VA. The
content within this program is not created or endorsed by
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any product, building method, or service. Information on the
specific content can be addressed at the conclusion of this
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Overview & Outline
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What is BIM?
Types of Content - “Objects”, “Systems”, and “Materials”
Product Data – Capitalizing the “I” in BIM
BIM Graphics – How accurate should they be?
Standards and Formats
BIM as a Specification Tool
Creating Models
Discussion – Q + A
What is BIM?
Building Information Modeling (BIM): A technology which
allows relevant graphical and topical information related to the
built environment to be stored in a relational database for
access and management.
• Definitions:
BIM Definitions
– Building (n): Any structure, project, system, or space.
• Construction
• Transportation
• Geospatial
– Information (n): Knowledge of specific events or topics gathered or
received by communication.
– Modeling (v): Creation of a schematic description of a system, theory, or
design that accounts for its known or inferred properties for further study of
its characteristics.
• Definitions as they apply to BIM:
– Building Information (n): Knowledge applicable to a given project, system,
or element.
– Information Modeling (v): A description of the attributes of a design for
further study of its characteristics.
– Building Modeling (v): Description of a structure, project, system or space
by way of visual and graphic representation.
VISION OF BIM
Vision of BIM
• Documenting a Building’s Lifecycle
– Archival of building progress at each phase of
project development
– Global element and system updating facilitates
creation of “As-Built” building models
– As-Built model information leveraged for Facilities
Management building usage and maintenance
forecasting.
Benefits of BIM
• Process Automation – Eliminate Redundant Tasks
• Design Analysis – Structural / Energy Modeling
• Active Specifying – “What-if” scenarios for product
selection
• Conceptualization / Visualization
• Minimize Change Orders through Clash Detection
and Model Analysis
• Financial - $$$
Benefits of BIM
How BIM Content Works
Raw Materials
Concrete
Glass
Wood
Plastics
Building Materials
‐5/8” Laminated Glass
‐45mil TPO Membrane
‐12”x12” Honed and
Filled Travertine
Building
Products
‐Windows, Doors
‐Fixtures, Fittings
‐Lighting
‐Furnishings
Building
Assemblies
‐Roofs
‐Floors
‐Walls
‐Railings
‐MEP
BIM Materials
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Materials
– Raw Materials – Common materials used by
building industry
• Wood, Steel, Concrete, Asphalt, Glass, etc.
• Convey appearance, model behavior, and performance
• Used for development of manufactured “Products”
– System Materials - Actual products within
assemblies
• 5/8” Type X Gypsum Wallboard, 2” Solid Oak Flooring,
¾” CDX Sheathing, .060” TPO Roof Membrane
• Convey appearance, model behavior, performance,
type, classification, usage
• Used for development of assemblies
– Finishes – Finishes used within projects
• Paints, Coatings, Gloss Levels, AAMA/BHMA finishes
• Carry detailed product information for specification
purposes
• Allow designer to select available products and/or
available colors
BIM Objects
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Products carry information relevant to the
performance of the overall building
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Resource and energy consumption data
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Effective lifespan of element
Products contain descriptive indicators which
differentiate similar from same products
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MasterFormat, Uniformat, Omniclass, Annotations Tags
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Identifiers, Descriptions, Comments, Notes
Products carry properties for design and
selection criteria.
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Allows qualification and quantification for product
comparisons.
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Documents what a product is, and why it was chosen
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Creates a reference standard for replacement.
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Elements have a documented standard for future analysis
of the building.
BIM Objects
Sample Object – Hand
Dryer
Assemblies and Systems
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Assemblies and Systems
– Carry information relevant to
individual products as they relate to
an assembly as a whole (Walls,
Floors, Ceilings, Roofs)
• Configuration of systems based
on Logical Design (Rated
Assemblies)
• Configuration based on design
requirements (Thermal, Sound)
• Configuration based on
preference (Color, Finishes)
– Manufacturer specific products with
“As specified” components simplify
design process
Assemblies and Systems
Sample System – Roof Assembly, Specified
Insulation
Product Data
Product Data
• How Much is too Much?
– Data is a minor use of file size and software resources
• Better to have information and not need than to need and not have
• Data is viewed through filters such as schedules and software
“plug-ins” allowing unnecessary data to be “Hidden”
– Quality, not quantity
• Relevance is important
• Avoid descriptive data and terms
• Embed information only where necessary for model analysis
– Structural Properties
– Usage Properties
• Linking to web-based data keeps information current
– Base Information levels on project requirements
• Structural information on interiors project
• Lighting Information on structural project
Product Data
Links
Materials & Finishes
Dimensions
Product ID
Lifecycle
Analysis
Contact
System Data
Product ID
Materials
Dimensions
Links
Lifecycle
Analysis
Contact
BIM Graphics
Product Design vs. Product Implementation
• Graphics - Product Design vs. Product
Implementation
– Product Design Graphics
• AutoCAD, Inventor, Solidworks
• Purpose – Product Development, CNC,
Manufacturing
• Represents values necessary to manufacture.
– Product Implementation Graphics
• Revit, Bentley, ArchiCAD
• Purpose – Convey design intent, simplify design
process, specify exact product
• Represents values necessary to specify, implement
and maintain.
– Dimensions
– Finishes
– Options
BIM Graphics
Detail Levels
– Coarse – Accurate to ¼”
• Defines geometric space for clash detection
• Depicts basic shape for identification
• Products that are selected by function not by form – Mechanical,
Structural.
– Medium – Accurate to 1/8”
• Accurate geometry
• Products primarily selected by function with some consideration of
form – Windows, Doors
– Fine – Accurate to 1/16”
• Accurate shape and appearance.
• Allows for quality renderings and conceptualizations
• Products selected by Form – Fixtures and Fittings, Decorative
Lighting Devices, Casework and Trim
BIM Graphics
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Determining Detail Level
Determining Detail Requirement
– Consider Design Intent
• What benefit does your model give the Architect / Engineer
– Rendering?
– Analysis?
– Research, Product Selection and Quantity Take Off?
– Consider the Location within the Project
• If nobody’s looking at it, it might as well be a cube.
– Consider How the Product is Selected
• Is a product chosen based on form or function
– Kohler Faucet vs. Taco Hydronic Pump
– Consider Budget
• The less accurate the graphics, the more products it can
represent (ie. 200 electrical receptacles modeled with 1
object). The data drives the differences.
• Products based on aesthetics typically cost more to model
overall.
– Every faucet is its own model
– Every hydronic pump can be represented in one model
STANDARDS AND
FORMATS
Standards and Formats
• MasterFormat™
– Categorization of work results
– Documents “what” work was
performed
– Top level / cross-reference /
keynote
– Acts as reference keynote to
prepared specification
– More depth of knowledge
required for BIM models
• Qualification Data Descriptors
• Quantification Data –
Performance Aspects
Metal Windows: 08
51 00
Standards and Formats
• Uniformat
– Classification of Assemblies and
Elements
– Documents Components and
Systems
– Acts as reference between
Assembly and BIM Model
– Again - More depth of
knowledge required for BIM
models
• Qualification Data Descriptors
• Quantification Data –
Performance Aspects
Aluminum
Windows:
B2020.08520
Standards and Formats
• Omniclass Tables
– Table 23 – Products
• Describes individual products by appearance
• Used in Assemblies (UF) to create Work Results (MF)
– Table 31 – Phases
• Useful as a Data Filter
• Organize data based on need at specific points during project lifecycle
– Table 41 – Materials
• Qualification and Organization of Materials used on the project
– Table 49 – Properties
• Useful as a Taxonomy
• Unify and Quantify physical properties of elements and products.
Standards and Formats
• Other Standards and Formats
– CSI GreenFormat
• Organization of data associated with Sustainability / LEED
– National CAD Standard
• Graphics layering gives way to Information layering.
• Align NCS with BIM to avoid confusion during transition
• Existing format to manage project data – Organize information
with graphics
– Other Property Set Development
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SPIE
IFC / IFD
NIBS
NBIMS
USGBC
BIM AS A SPECIFICATION
TOOL
From This…
To This…
Using BIM to Specify Products
– Product Selections and “What-if” Scenarios
• When attributes are standardized, BIM scheduling tools can create product
comparisons
• Actual products can be inserted and model analysis performed “on-the-fly”
– Research
• BIM Product data can be viewed prior to implementing in the model
• Links allow product research and related information to be found that applies to
the specific product in question
– Product Updates
• Graphics and associated data about products and systems can be changed
throughout the design
• Allows additional information to be added/changed/viewed/removed at various
points in the project
– Tabular Data Outputs (Schedules)
• Virtually anything can be scheduled as long as the data is in the model
• Performance and design data schedules can eliminate paper “data sheets”
Specification Documents from BIM Data
– Project info more organized
• Information comes from well organized data sets including performance criteria, keynotes,
assembly codes, descriptors and notes
• Informational links allow for simplified product solutions research
– More Accurate
• The more information that is provided, the more accurate the documentation can be at an
earlier point.
• Allows more time to develop solutions
– Creates a point of reference
• Singular point of data unifies information
• Model Data = Specification Data
– Accountability
• Date-stamped record of information provided
• Creates a clear division of Work
– 3rd party “plug-ins” which attach to BIM software
• Create baseline specifications
• Typically non-specific to actual manufactured product
• No reference standard
Creating Models
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Selecting Attributes
– BIM is larger than singular participant in the
project
– Provide attributes necessary for project
based on conditions, intent and necessity
– Critical need for development of standards
– Specifier doesn’t know what every
interested party needs
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Hosting vs. Owning – Pros & Cons
– Ownership
• Pro - Full control of model use
• Con - Larger upfront cost,
– Hosting
• Pro – Payment over time, Updates a part of
hosting agreement
• Con – Potentially limited use of Models
QUESTIONS, COMMENTS AND
DISCUSSION
Robert S. Weygant, CSI, CDT, SCIP
Email: [email protected]