Model View Definitions For Precast Concrete Priority One

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Model View Definitions For Precast Concrete
Priority One
PCI Specifiers and Implementers Conference Call
Chuck Eastman Rafael Sacks Ivan Panushev Shiva
Aram Manu Venugopal
Monday, June 22, 2009 , Web-meeting
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MVD For Precast Concrete Priority One
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Exchanges according to priorities set in Chicago
1st Priority Grid control lines and location
references to these Building spatial
hierarchy All precast pieces (as manifold B-Reps)
and piece type definitions Systems (slabs,
stairs, bleacher, raker, P-cells, tube) Exchange
camber and twist parameters Generic nonprecast
pieces 2nd Priority Metadata and status
information for precast other pieces Extrusion
geometry for precast pieces Connection shape
modifications to precast pieces, blockouts
B-reps 3rd Priority Structural model
and relations to physical pieces 4th
Priority Embeds articulated internal
connections Reinforcing and tendons 5th
Priority Add ability to exchange architectural
pieces as CSG Concrete mix, Facades, Joint
information, Finishes 6th Priority Elaborations
toppings distinct from washes, plant applied vs
field applied components, etc.
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Background IDM
Test here
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Workflow and Use Case Exchanges
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Generic Concepts
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MVD Priority One Focus
Site Contained in Project Spatial Structure -
Building in Site Site Perimeter Spatial Structure
- Building Storey in Building Spatial Structure
- Space in Building Spatial Structure - Space in
Building Storey Grid and Grid Axis
Representation Grid Axis Assignment Grid
Placement in Spatial Structure
GENERAL MVD DIAGRAMS NOT SPECIFIC TO PRECAST
PRECAST SPECIFIC MVD DIAGRAMS
PRECAST PIECES
Element Attributes Element Type
Assignment Precast Property Set
Assignment Precast General Attributes Precast
Fabrication Attributes System Piece
Aggregation Actor Assignment Approval
Assignment Precast Piece Material
Association Precast Piece Containment Relative
Placement Absolute Placement Placement Relative
to Grid Generic Shape Representation Generic Brep
Shape Geometry
PRECAST PIECE TYPE Precast Piece Type
Attributes Piece Type Geometry Assignment Precast
Piece Aggregation
NON-PRECAST ELEMENTS
APPENDIX A BUILDING ENTITY SUBTYPES FOR PRECAST
PIECES AND PRECAST PIECE TYPES
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IFC 2x - IFC 2x4 Concept Bindings
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Level of Detail (LOD) - AGC
Level of Detail (LOD) 100. Conceptual 200.
Approximate geometry 300. Precise geometry 400.
Fabrication 500. As-built
Jim Bedrick, AIA, Webcor Builders
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Level of Detail (LOD) - AGC
Jim Bedrick, AIA, Webcor Builders
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Level of Detail (LOD) - AGC
Jim Bedrick, AIA, Webcor Builders
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Level of Detail (LOD) for Precast

• User-defined LODs for precast intended to
  facilitate BIM exchanges
• Propose defining LOD with Priority Two OK??
• Who takes the initiative to develop their
  definitions?
• Should be integrated with the IDM?

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Overview of Schedule Issues
Merge and show relationships between three
different schedules
1. Our main schedule and its products and timing
2. The IFC release schedule for 2.x4, which has
precast extensions
3. When and what software companies can
implement, based on their production cycles?
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Current Work and Proposed Schedule
Part One 2x3 Implementation
Part Two 2x3 Implementation
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Current Work and Proposed Schedule
Part One 2x3 Implementation
Part Two 2x3 Implementation
Part Three 2x3 Implementation
Full 2x4 Implementation
IFC 2.x4 Release (4/1/2010)
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Exchanges according to priorities set in Chicago
1st Priority Grid control lines and location
references to these Building spatial
hierarchy All precast pieces (as manifold B-Reps)
and piece type definitions Systems (slabs,
stairs, bleacher, raker, P-cells, tube) Exchange
camber and twist parameters Generic nonprecast
pieces 2nd Priority Metadata and status
information for precast other pieces Extrusion
geometry for precast pieces Connection shape
modifications to precast pieces, blockouts
B-reps 3rd Priority Structural model
and relations to physical pieces 4th
Priority Embeds articulated internal
connections Reinforcing and tendons 5th
Priority Add ability to exchange architectural
pieces as CSG Concrete mix, Facades, Joint
information, Finishes 6th Priority Elaborations
toppings distinct from washes, plant applied vs
field applied components, etc.
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Issues
Software implementation?
Questions regarding the Exchange Standard
Specification and Schedule?
Questions about IFC Implementation or other
aspects?
Open questions are we proceeding in the best
direction?
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Action Items