MODEL IMPORTEXPORT AND BIM

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MODEL IMPORT/EXPORT AND BIM

• Brian Cobb
• Structural Detailing, LLC

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Topics to be covered

• Model export - everyone can do it!!
• 3d-DXF export
• CIS/2 export
• VRML export
• Creating an IFC file
• Troubleshooting
• Model import -
• Import a CIS/2 file
• Troubleshooting
• BIM
• What is it? How do I do it?

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Demo Model
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Model Export
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Model Export
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3d-DXF Output
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3d-DXF Output
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3d-DXF Output

• Pros
• Accurate Representation
• Easy to navigate
• Import direct to REVIT
• Common MEP format
• Cons
• Large File Size (6MB this job, 500MB on 2000 ton
  job)
• Cannot pick members to export (PR item)
• No direct import to NavisWorks
• No intelligence

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VRML Output
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VRML Output
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VRML Output - NavisWorks
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VRML Output

• Pros
• Accurate Representation
• Intelligence (finish, member data, sequencing
  data )
• Direct import to NavisWorks
• Cons
• Medium File Size (750kb this job, 150MB on 2000
  ton job)
• Does not import directly to REVIT
• Cannot pick members to export

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CIS/2 OUTPUT

• Pros
• Most Comprehensive Data from SDS/2
• Send to CIS/2 compatible software (RAM and other
  design software)
• Can be used to convert to IFC
• Small file size 4MB on 2000 ton job)
• Cons
• Need to remove connections to go to Revit.
• Does not load to Navis Works.

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CIS/2 OUTPUT
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CIS/2 OUTPUT
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CIS/2 OUTPUT
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CIS/2 to VRML / IFC translator

• CIS2.NIST.GOV
• Written by Robert Lipman
• Converts CIS/2 to VRML and to IFC

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VRML via CIS/2 convert
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VRML via CIS/2 convert
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VRML via CIS/2 convert

• Pros
• Smaller File Size (181kb for this file vs. 750kb
  directly from SDS/2)
• Can use CIS/2 to specifically select members for
  export.
• Cons
• Problems with bent plate
• Curved workpoints mis-aligned
• Some intelligence lost

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IFC via CIS/2 convert
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IFC via CIS/2 convert
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IFC via CIS/2 convert

• Pros
• REVIT compatibility
• Members to be exported can be specifically chosen
  (in original CIS/2 file)
• Cons
• Doesnt do bent plate
• Curved members represented incorrectly
• No intelligence

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Model Import
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Model Import

• Import via CIS/2
• Start with a new job
• Make sure you have enough members and views
  allocated.

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Model Import
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Model Import
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Model Import

• Potential Import Problems
• Columns modeled to nodal points
• Beams modeled to nodal points
• Top of steel vs. top of slab
• Poor modeling techniques

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Model Import

• Columns modeled to nodal points
• If importing from RAM or another design model,
  the columns will more than likely be modeled from
  floor-to-floor, not from base to roof or base to
  splice level.
• BE CAREFUL HERE ABM KILLER!!

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Model Import

• Beams modeled to nodal points
• If importing from RAM or another design model,
  the beams may be modeled at beam centerline.
• Beams may be come in at top of slab instead of
  top of steel.
• If importing from REVIT, this can be controlled
  make sure to ask for a drawing model (not an
  analytical model or analytical / drawing combo).

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Model Import

• Beams modeled to nodal points

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Model discipline
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Model discipline
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Model discipline
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Model discipline
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BIM

• Building Information Modeling
• A process, not a software
• The AGC defines BIM as an object-oriented
  building development tool that utilizes 5-D
  modeling concepts, information technology and
  software interoperability to design, construct
  and operate a building project, as well as
  communicate its details.

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BIM

• What is your definition / application of BIM?
• Receiving a model from the engineer.
• Providing a model to the engineer.
• Providing a model to the MEP sub for duct
  penetration coordination.
• Providing a model to the architect for
  incorporation to the design model,
• Providing the contractor with a model for
  incorporation into a multi-discipline model.
• Receiving AutoCAD drawings from the A/E team,
  with instructions to scale all dimensions.

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Keys to a successful BIM project

• Walk away (JUST KIDDING!!)
• Know your capabilities.
• Define the scope of BIM up front.
• Its probably too late to go BIM mid-way through
  the project.
• Do you need to model in all of the bent plate,
  hangers, kickers, etc?
• Test compatibility with other software before
  starting.

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QUESTIONS??