Delivering sustainability
BIM
And the cost of sustainability
BIM the cost of sustainability
January 2013
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
BIM the cost of sustainability
January 2013
Collaboration
Collaboration
Structural
Architect
QS
BIM the cost of sustainability
MEP
PM
Main
contractor
Sub
contractor
Client
FM
January 2013
Design, Build, Operate
BIM the cost of sustainability
January 2013
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
BIM the cost of sustainability
TEKLA
Structural
ArchiCad
Architecture
Data
enrichment
Bentley Systems
MEP
Quantity
extraction
Main
contractor
Specialist
sub
contractor
Client
FM
January 2013
Benchmarking
Benchmarking
BIM the cost of sustainability
January 2013
Benchmark: Capital
The Cabinet Office has published benchmarks
Secondary school of 8-10,000 m² is average £ 2,158/m²
This school (Primary) 2,400m²
£ 2,077/m²
BIM the cost of sustainability
January 2013
Benchmark: power, revenue and carbon
CIBSE has produced benchmarks for power consumption and carbon
emissions.
Schools and seasonal public buildings
Previous school
Average
F
D
260 kW/m²
190 kW/m²
Target
B
120 kW/m²
(less than half)
£11,000
73 tCO2
(previous £27,000)
(previous 190)
Utility cost per annum
Carbon emissions
BIM the cost of sustainability
January 2013
Life cycle cost
Life cycle cost
Capital
Replacement
Maintenance
Operation
BIM the cost of sustainability
January 2013
Framework “J” curve
With a framework the supply chain can afford to invest, gain experience and
improve.
20
15
10
5
0
-5
-10
-15
BIM the cost of sustainability
January 2013
Cost benefit analysis
Capital cost
Project 1
Project 2
Project 3
2%
1%
0%
(+) £108,000
(+) £54,000
(+)
£0
Revenue savings
• power consumption
• Utility bills
• Carbon emissions
(-) 120 kW/m²pa
(-) £16,000
(-) 105 tCO2
Payback
8,4,0 years
BIM the cost of sustainability
70-190
11-27k
75-180t
January 2013
Building Information Model
BIM the cost of sustainability
January 2013
Building Information Models
BIM the cost of sustainability
January 2013
3D, 4D and 5D
A
Architecture
S
Structural
ME
Mechanical Electrical and Plumbing
4D
W
+TIME planning and construction simulation
5D
Q
+COST (Capital, life cycle & FM)
3D
BIM the cost of sustainability
January 2013
Benefits
All information in one file
Co-ordinated collaboration
Visualisation
Clash detection
Building performance
High level reporting to management
Solving problems before site
Daylight, heat loss, reverberation
Standard component library
Create a standard specification
Lean construction
economies of scale
Standard format for data
Reuse and transfer of information
Client operational data
Refurbishment / adaption / space planning
BIM the cost of sustainability
January 2013
“Family” information
Click on “Family” for Information including length, area and volume.
BIM the cost of sustainability
January 2013
“Family” additional parameters
+QS, PM, BS and FM data
Capital rates
Life cycle cost (anticipated life expectancy)
Carbon reduction
Capital allowances
Programming and phasing
Building reinstatement cost
Health & safety
Client accountancy coding
Asset registers
Trade package coding
Risk management
Facility management planning
Material scheduling
BIM the cost of sustainability
January 2013
“Family” design options and level of detail
“Level of detail”
Alternative>
Doors: Timber, metal, glass etc.
Boiler: Biomass, Gas, CHP.
1 Concept
2 Schematic
3 Technical
BIM the cost of sustainability
January 2013
Revit plus
Cost, time and carbon
Designers
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
QS & PM
M&E
Structure
Architect
Revit
Program
Supply chain
Family files (*.RFA)
Rate
£
Life
Years
Material
Truss
500
70
Steel
AHU
1000
15
Copper
Door
300
45
Hardwood
Application
Programming
Interface
(API)
SQL Database
BIM the cost of sustainability
Object
January 2013
RLBIM API “add in”
x
BIM the cost of sustainability
January 2013
RLBIM: import RLB database
BIM the cost of sustainability
January 2013
Capital cost plan in Revit
BIM the cost of sustainability
January 2013
RIBA Plan of Works
A
B
Cobie drop
3D Design
C
D
E
1
Structural
G
H
1
J
MEP
Operation
L
4
QS
4
Information
5
Owner
Contractor
3
Building
Post completion
Construction
Construction
K
3
2
Operations
Mobilisation
Pre-construction
Tender action
Tender documentation
Production information
F
2
Architecture
Construction
Design
Technical design
Design development
Concept
Preparation
Design brief
Appraisal
RIBA plan of works: COBie drops
5
Exchange
COBie
BIM the cost of sustainability
January 2013
Conclusion
Conclusion
BIM the cost of sustainability
January 2013
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
Lower utility bills (revenue costs)
Lower Carbon emissions
BIM the cost of sustainability
-£
-kW
-£pa
-CO2
January 2013
Delivering sustainability
Brendan.Patchell@uk.rlb.com
RLB.com
BIM the cost of sustainability
January 2013