Invited Professional Development Seminar - BIM Introduction for Quantity

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Invited Professional Development Seminar - BIM Introduction for

Quantity

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Institute for Research in Construction

BIM Introduction for Quantity

Surveyors

Centre for Computer-assisted Construction

Technology

John Dickinson, Ph.D., P. Eng.

[email protected]

28 February 2011

National Research Council

• National organization, federal government agency

• Over 4,200 full-time employees; over 1,446 guest workers

• Labs and facilities across Canada

• Dissemination of S&T information to industry

and scientific community

• Provides essential elements

of national S&T infrastructure

(3)

The NRC Centre for Computer-assisted

Construction Technologies

Part of NRC Institute for Research in Construction

Research and development driven by four issues in construction

industry:

• the need to improve productivity

• growing complexity of built environments

• sustainable development

• changing workforce demographics

NRC-CCCT

Increasing productivity of the construction

life-cycle through applied technology

• Computational tools to aid design, implementation &

management of built resources

• Decision support tools

• Digital knowledge & information management

• Tools and practices to improve the efficiency of the

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Presentation Outline

What is BIM?

 Why care?

 Intent or promise

 Definitions

 Game Changer

BIM @ work

 In use

 Bottom Line

 Organisations

BIM and QS

 Task & Role

Implications

 Standards

 Products

What is BIM?

Why care?

BIM Intent or Promise

BIM Definitions

Game Changer

(5)

Why Care?

Lost Money

2004 NIST report

(Cost Analysis of Inadequate Interoperability in the

U.S. Capital Facilities Industry)



$15.8B/y lost due to poor interoperability

• 1-

2% industry’s revenue



2/3 during operations and maintenance phase

http://www.bfrl.nist.gov/oae/publications/gcrs/04867.pdf

The Promise:

Interoperability

(6)

BIM Standards Organisations

principal product is the

National BIM Standard

(NBIMS)

BIM Definition

A Building Information Model (BIM) is:

• a

digital

representation of physical and functional

characteristics and relationships

• a lifecycle

information collection

point

• for

collaboration

by different stakeholders at different

phases

• focused on

saving resources

- time, money, materials

• founded on

open standards

for interoperability

(7)

CAD vs. BIM

• 2D or 3D

• Lines

• Layers if done properly

• Robust exchange

standards

• No standard way of

adding contextual

• 3D or more

• Physical & functional

elements

• Well-defined collection

of facility data

• Machine interpretable

• Traceability, ownership

4D

– Time

5D

– Cost

BIM Lifecycle View

(8)

Building Information Modeling

What it isn’t:

• Formalised process

What it is:

• Using BIM for

Communication,

Collaboration

and Data Reuse

• For all aspects of a facility

• Over entire life-cycle of a facility

Autodesk (c)

Create, Use and Maintain BIM

Potential for Game Changer

• Avoid late changes

- Miss-understandings,

miss-communications, unforeseen

consequences

• Better solutions

- No missed-opportunities,

multi-disciplinary approaches,

mutual understanding

and consensus

- Less errors/clashes,

- Correct materials/tools/people

at correct time,

- Offsite work, prefab assemblies

http://www.cenews.com/magazine-article-cenews.com-october-2008-what_does_bim_mean_for_civil_engineers_-6098.html

Communication

Collaboration

(9)

BIM @ Work

BIM In Use

GC Bottom Line

Organisations Backing/Using BIM

Design

Visualisation

• Architects

• Industrial Designers

• Functional Analysis

• Real Estate

• Commercial Property

Managers

• Interior Decorators

h ttp :// m y. o p e ra .co m /ki e n tru cvn /a lb u m s/ sh o w p ic. d m l? a lb u m = 7 2 4 0 1 2 & p ict u re =9 7 7 9 6 6 2 h tt p :/ /d isco u n t. b in a o ffi ce fu rn itu re .co m /2 0 1 0 _ 0 7 _ 0 1 _ a rch ive .h tm l

(10)

Facility Appearance - Visualisation

Geographical Rendering and Neighbourhood Impact

Interior Rendering and Walk through

(11)

Engineering

- Green/LEED/Sustainable

Orientation Optimization

Energy Analysis

Engineering - Systems & Structure

Source: RISA Technologies

http://www.bimoutsourcing.com/hvac-service.htm

http://www.pmengineer.com/ Articles/Cover_Story/2009/0 2/01/The-Benefits-of-BIM-in-Plumbing-Design

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Analysis Simulations

Facility Performance

– Owners/Ops

Consummation Variation on a year

4,000.00 4,500.00 5,000.00 5,500.00 6,000.00 6,500.00 7,000.00 7,500.00 8,000.00 8,500.00 9,000.00 Ja n Ja n Ja n Ja n Ja n F e b F e b F e b F e b M a r M a r M a r M a r A p r A p r A p r A p r A p r M a y M a y M a y M a y Ju n Ju n Ju n Ju n Jul Jul Jul Jul Jul Aug A u g A u g A u g S e p S e p S e p S e p S e p O ct O ct O ct O ct N o v N o v N o v N o v D e c D e c D e c D e c D e c E n e rg y C o n s u m m a ti o n ( k Wh ) Average 2003 Average 2004 Average 2005 Average 2006 Average 2007

Energy analysis, comfort, controls automation

2 3

1

4

N

Daily Direct Radiation Average

100 200 300 400 500 600 700 800 900 1000 D ir ec t R adi at ion (k J/ m 2)

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General Contractor

Workface planning, scheduling, coordination

• General Contractors

http://www.youtube.com/watch?v=FE_zYiltsAw

http://www.cadalyst.com/aec/bim-and-project-planning-1-2-3-revit-tutorial-3520

General Contractors

• Constructability – clashes before workers onsite

• Bid – 3D-4D visualization process

• Scheduling – planning, slippage

• Coordination meetings

• Progress tracking

• Materials / Supplies

• Off-site fabrication – ease yard management

• Reduced RFI’s – models vs. drawings

(14)

Accurate Cost Estimating

http://www.cadalyst.com/aec/army-corps-drawn-bim-design-3764

Quantity take-offs, dimensional measurements

Bottom Line

– GC

Partial VDC project vs. Benchmark projects

• 50% RFIs

• Per-RFI cost 1/5

th

• Over-runs costs 1/15

th

_typical

• Project completed months ahead schedule

- Benchmarks months delayed

http://www.tpm.com/component/content/article/1-latest-news/513-how-bim-is-being-utilized-by-general-contractors-and-its-benefits-a-general-contractor

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Sub-Contractors

• Bidding

- 3D visual models

– physical layouts

- COBie models

– spreadsheet specs

- Digital quantity take-offs, measurements

- Equipment specs

• Deliverables

- Digital paperwork – COBie

• Bottom Line

- Will become a necessity

- Make it a business advantage

Early Canadian Industry Adopters

EllisDon

HIP Architects

RAIC

RCNA

Stantec

Halsall Associates

PCL Construction

PFLA Inc

DOWCO Group

... more

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Organisations

American Institute of Architects

Associated General Contractors

General Services Administration

The FIATECH Consortium

Construction Specifications Institute

Canada/US Green Building Council

Canadian Construction Assoc.

Canada BIM Council

Steel Construction Institute

BIM and QS

Tasks and Role implications

Standards

BIM capable products

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Quantity Surveyors Tasks

Building Estimator, Construction Economist, Cost

Engineer

• Talk to architects, engineers, builders, contractors,

suppliers and project owners

• Study plans

• Prepare bills/schedules of quantities

• Check on changes of design for cost impact

• Assess and recommend payments during construction

• Prepare cash-flow forecasts and tax depreciation

schedules

• Feasibility studies assessing worth of a project

proceeding

BIM Impact on Quantity Surveyors

QS

Talk with AEC & suppliers

•Digital model exchange

Study Plans

•BIM, not drawings

Prepare bills of quantities •Model Specs Cost of RFCs •Model specs Construction payments •Record of progress Cash-flow forecasts •4D BIM

(18)

Autodesk (c)

BIM Level of Detail / Completeness

• BIM model progresses during life

• More and more information added

• Missing construction

assembly details

• Opportunities for QS

• Generic / missing data

• As-built / Model management

Key Standards IFC

IFC

:

Industry Foundation Classes

• .ifc files

• Model View Definitions – legal subsets of data

• Objects: basic building elements, spaces, ...

• Certification program

(19)

Interoperability at a glance

– IFC

IFC

: Industry Foundation Classes (.ifc)

• Objects: spaces, basic building elements, ...

• Certification program

• Model View Definitions – legal subsets of data

Two common IFC2x3 model views:

• Coordination View – design & construction

• Basic FM Hand Over – construction & operator

-

COBie

:

Construction Operations Building information exchange

- Spreadsheet based

– contractor/supplier editable

(20)

Interoperability

CIS/2.1 & gbXML

CIS/2.1

: CIMsteel Integration Standards

Release 2

• Steel Construction Institute

• Structural steelwork industry

• Detailing, analysis, analysis, …

gbXML

: green building XML

• Mostly for energy and comfort modelling packages

• Chunks facility into contiguous spaces

• Equipment

Specification’s Relevance

in Design-Bid-Build

IFC/Coordination View IFC/COBie View CIS/2.1 gbXML

Concept,

Design

Tender, Bid, Procurement Construction, Commissioning Operation, Occupation Depending on involvement Depending on involvement

Interoperability

Specifications

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Quantity Takeoffs from BIM

Functionality:

• Digital dim / counts

• Automatable – rules

• Spreadsheet export

• Automated selection /

highlighting

• Grouping assembly /

zone

• Classification (CSI)

• Comparison after

changes (colourised)

http://www.youtube.com/watch?v=BfNJJ8QwF5g

QTO Tool Manufacturers

• Vico Software

• Innovaya

• Autodesk Quantity

Takeoff

• Tocoman

Link to Sage

Timberline

or other databases

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BIM Capable Tools

All the major design suites packages:

• Autodesk – Revit

• Bentley – Microstation

• Graphisoft – ArchiCad

• Most engineering tools, many quantity tools

If you are a smaller contractor / installer /

maintenance

– MS Excel

Picking BIM Capable Tools

Ask your industry

association, colleagues

Be compatible: clients,

fellow trades, partners

Check the internet

• industry forums and

publications

• e.g. AECBytes,

Constructor

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Contact Details

John Dickinson

Tel: (519) 430-7123

[email protected]

Centre for Computer-Assisted Construction Technologies

National Research Council Canada

800 Collip Circle, London, ON N6G 4X8