Download - BIM - Stokes & Hedge
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Building Information Modeling (BIM):Brilliant or Balderdash?
Presentation by Zane Hedge & Michael Stokes
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Presentation Outline
Introduction
BIM Basics
BIM Expectations
Practical Considerations
Legal Considerations
Q&A
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Introduction
The State of Ohio in the US has made the useof BIM mandatory on all projects valued at >
$4 million or with a M&E content greater than40% of the construction cost
Paul Morrell the Chief Construction Adviser to
the UK Government has stated that BIM willbecome mandatory on all publicly procuredprojects
In Singapore statutory building approvalapplications can now be made on the basis ofBIM models
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BIM - What is BIM?
BIM is NOT an event
BIM is NOT a software
BIM is NOT a language
BIM is NOT simply 3D
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BIM - Focus on Information
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BIM: Full Life-Cycle Opportunities
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BIM: Design Stage
Reducing Conflicts through Better Coordination
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BIM: Construction Stage
AND:
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BIM: Facilities Management
THEN:
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BIM: Collaboration
ARCHITECTS
STRUCTURAL
ENGINEERS
MEP SYSTEMS
ENGINEERS
BUILDERS &
FABRICATORS
OWNERS
BUILDING
INFORMATION
MODEL
CIVIL
ENGINEERS
Autodesk 2009
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Expectations - Design
For Design, BIM should:
Reduce Design Errors through Better Coordination
Reduce the Number of Drawing Revisions
Reduce the Design Schedule Duration
Reduce the Outturn Cost of the Project
Improve Communication
Create a Genuine Team Spirit
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Expectations - Communication
Improving Communication with Visualization
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Expectations - Construction
For Construction, BIM should:
Reduce Shop Drawing Time
Reduce Conflicts through Better Coordination
Minimize the Construction Schedule Duration
Reduce Additional Cost to the Project
Improve Communication between the Team
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Expectations Facilities Management
For Facilities, BIM should:
Reduce Operational Costs
Organize the Paper Chase at Project Closeout
Feed Building Management / Control Systems
Deliver Reliable As-Builts
Improve Maintenance Work Order Time-to-Complete
Optimize Systems Control and Energy Planning
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Practical Considerations
Requires Whole Team Collaboration
Requires a New Approach to Procurement
Can Result in Front End Loading of DesignCosts
Partial Implementation is Unlikely to Realizethe Full Potential Benefits
Could Add an Additional Layer of
Professional FeesMay Require Financial Investment In
Hardware / Software
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Legal Considerations
Commentators and users refer to a number of
concerns / legal considerations
The most significant seem to relate, perhapsunderstandably, to design responsibility andissues related to data contained in the BIMmodel
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Legal Considerations
Key Issues relate to (see Howard AshcraftsSCL Paper D101 June 2009):
o Design responsibility / Required standard ofcare
o Legal status of the modelo Intellectual property
o Information ownership and preservation
o Data misuseo Loss of data
o Interoperability
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Legal Considerations
Design Responsibility & Standard of Care
For contractors what if a contribution to theBIM causes / results in a design change?
Design Control? E.g.o What is to be modelled?
o Can one Contributor change another Contributors input /
design?o Limits on BIM use: can others rely on (a) dimensions, (b)
quantities, (c) clash detection?
o Hierarchy of communications
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Legal Considerations
Design Responsibility & Standard of Care
Does/will the implementation of BIM change thestandard of care required of designers?
o It could, in the future
oConsider clash detection
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Legal Considerations
Information Ownership & Preservation
Fragility of the BIM (whose risk?) Considerimpact on other Contributors?
Data preservation (and associated audit trail)
Consider the impact of overwritten data
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Legal Considerations
Response to legal Issues
US ahead of the game, for example: CONSENSUSDOCS 301 BIM Addendum (2008)
o No impact on risk or contract obligations
o Incorporated into construction contracts
o Architect remains responsible for design
o Contractors participation in the BIM is not design
o Information Management (and Manager)
o BIM Execution Plan
o Risk Allocation
Youre responsible for your Contribution (made or arisingfrom access to the Model)
Dimensional accuracy (multi-choice!)
EOT for defect in software causing delay
IP rights in Models
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Legal Considerations
Response to legal Issues
US ahead of the game, for example (# 2): AIA Document E202 BIM Protocol Exhibit (2008)
o Intended to be incorporated into contracts
o Space to insert bespoke Model Standards, File Formats,, ModelManagement
Protocols to be developed for key issues E.g.:
o Clash detection
o Access rights
5 Levels of Development (LODs). At each level therequirements and uses are (loosely!) defined.
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Legal Considerations
Response to legal Issues
US ahead of the game, for example (# 2): AIA Document E202 BIM Protocol Exhibit (2008)
Model Element Table
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Legal Considerations
Response to legal Issues
Outside of the US?
No specific plans:o JCT
o NEC
o FIDIC
o ACA
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Closing Remarks
Here to stay Already well established in the US andincreasing implementation elsewhere
A different approach? if used as a piece oftechnology No. However, supporters will say it is
the technological backbone of true collaboration
A cause for concern.good designers have nothing toworry about! But some attention to duties andresponsibilities is required
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Q&A
End of Presentation