bim and the cost of sustainability
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Delivering sustainability. BIM And the cost of sustainability. Introduction. This is a case study of a PassivHaus primary school that has been collaboratively designed, built and operated. For a modest capital investment PassivHaus generates very low: P ower consumption kW - PowerPoint PPT PresentationTRANSCRIPT
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January 2013BIM the cost of sustainability
BIMAnd the cost of sustainability
Delivering sustainability
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January 2013BIM the cost of sustainability
Introduction
This is a case study of a PassivHaus primary school that has been collaboratively designed, built and operated.
For a modest capital investment PassivHaus generates very low:•Power consumption kW•Utility bills (revenue costs) £•Carbon emissions CO2
The tools required include:•Collaboration •Benchmarking•Life cycle cost •Building Information Modelling•Facilities management
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January 2013BIM the cost of sustainability
Collaboration
Collaboration
QS
Main contractor
Client
Subcontractor
FM
ArchitectStructural MEP
PM
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January 2013BIM the cost of sustainability
Design, Build, Operate
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January 2013BIM the cost of sustainability
BIM Collaboration
Information is added to the same model as the design progresses.
The coordinator can merge the separate files by converting to IFC “common” file format
The Design & Build contractor can add supply chain information
The client owns the completed BIM and amends with refurbishment and adaption
Data enrichment
Main contractor
Client
Specialist sub
contractor
FM
ArchiCadArchitecture
TEKLAStructural
Bentley SystemsMEP
Quantity extraction
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January 2013BIM the cost of sustainability
Benchmarking
Benchmarking
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January 2013BIM the cost of sustainability
Benchmark: Capital
The Cabinet Office has published benchmarksSecondary school of 8-10,000 m² is average £ 2,158/m²This school (Primary) 2,400m² £ 2,077/m²
“More for less”“Good is good enough”20% savings in capital cost
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January 2013BIM the cost of sustainability
Benchmark: power, revenue and carbon
CIBSE has produced benchmarks for power consumption and carbon emissions.
Schools and seasonal public buildings
Previous school F 260 kW/m²Average D 190 kW/m²
Target B 120 kW/m² (less than half)
Utility cost per annum £11,000 (previous £27,000)Carbon emissions 73 tCO2 (previous 190)
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January 2013BIM the cost of sustainability
Life cycle cost
Life cycle cost
Capital
MaintenanceReplacement
Operation
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January 2013BIM the cost of sustainability
Framework “J” curve
With a framework the supply chain can afford to invest, gain experience and improve.
20
15
10
0
-5
5
-10
-15
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January 2013BIM the cost of sustainability
Cost benefit analysis
Capital cost Project 1 2% (+) £108,000Project 2 1% (+) £54,000Project 3 0% (+) £0
Revenue savings•power consumption (-) 120 kW/m²pa 70-190•Utility bills (-) £16,000 11-27k•Carbon emissions (-) 105 tCO2 75-180t
Payback 8,4,0 years
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January 2013BIM the cost of sustainability
Building Information Model
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January 2013BIM the cost of sustainability
Building Information Models
What is a Building Information Model?
A 3D drawing plus information
All the data for a project is stored in one fileThe data is dynamically inter related
The information we need to add includes:
Capital cost, time programmes, life cycle costs, capital allowances, embodied carbon, carbon in use and Facilities Management
3D + i
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January 2013BIM the cost of sustainability
3D, 4D and 5D
3D
A Architecture
S Structural
ME Mechanical Electrical and Plumbing
4D W +TIME planning and construction simulation
5D Q +COST (Capital, life cycle & FM)
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January 2013BIM the cost of sustainability
Benefits
All information in one file Co-ordinated collaboration
Visualisation High level reporting to managementClash detection Solving problems before siteBuilding performance Daylight, heat loss, reverberation
Standard component library Create a standard specificationLean constructioneconomies of scale
Standard format for data Reuse and transfer of information
Client operational data Refurbishment / adaption / space planning
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January 2013BIM the cost of sustainability
Click on “Family” for Information including length, area and volume.
“Family” information
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January 2013BIM the cost of sustainability
“Family” additional parameters
+QS, PM, BS and FM dataCapital ratesLife cycle cost (anticipated life expectancy)Carbon reductionCapital allowancesProgramming and phasingBuilding reinstatement costHealth & safetyClient accountancy codingAsset registersTrade package codingRisk managementFacility management planningMaterial scheduling
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January 2013BIM the cost of sustainability
“Family” design options and level of detail
“Level of detail”
1 Concept
2 Schematic
3 Technical
Alternative>Doors: Timber, metal, glass etc. Boiler: Biomass, Gas, CHP.
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January 2013BIM the cost of sustainability
Revit plus
Designers Cost, time and carbon
Revit file (*.rvt)
Object Position Floor X(m)
Y(m)
Z(m)
Truss A:A +2 10.3 5.60 0.003
AHU A:A +1 1.00 1.00 1.00
Door B:B 1:2 0.30 0.30 4.00
Object Rate£
LifeYears
Material
Truss 500 70 Steel
AHU 1000 15 Copper
Door 300 45 Hardwood
Supply chainFamily files (*.RFA)
Architect
Structure
M&
E
QS
& P
M
Application Programming
Interface(API)
Revit Program
SQ
L Database
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January 2013BIM the cost of sustainability
RLBIM API “add in”
x
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January 2013BIM the cost of sustainability
RLBIM: import RLB database
RLBIM External database(NRM description library).OUTSIDE of Revit but accessible from within Revit.
The “primary key” is the same assembly code as used within Revit
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January 2013BIM the cost of sustainability
Capital cost plan in Revit
And Elemental Breakdown
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January 2013BIM the cost of sustainability
RIBA plan of works: COBie drops
ArchitectureStructural MEP
1 2
Appraisal
Design brief
Preparation
Concept
Design development
Technical design
Design
Production information
Tender documentation
Tender action
Pre-construction
Mobilisation
Construction
Construction
Post completion
Operation
RIBA Plan of Works A B C D E F G H J K L
Cobie drop 1 2 3 4 5Contractor Owner
43 5
QS
COBie
3D Design
Construction Operations Building Information Exchange
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January 2013BIM the cost of sustainability
Conclusion
Conclusion
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January 2013BIM the cost of sustainability
Summary
Delivering sustainability from start to finish in a cost-effective way
A holistic approach to capital and revenue
•Collaboration•Building Information Modelling•Life cycle cost planning
Benefits:
•Economies of scale and standardisation -£•Lower power consumption -kW•Lower utility bills (revenue costs) -£pa•Lower Carbon emissions -CO2
“More for less”“Good is good enough”20% savings in capital cost
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January 2013BIM the cost of sustainability
Delivering sustainability
RLB.com