bim - stokes & hedge

8/7/2019 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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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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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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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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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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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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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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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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US ahead of the game, for example (# 2): AIA Document E202 BIM Protocol Exhibit (2008)

Model Element Table


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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

bim - stokes & hedge

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